Table of Contents
Overview
Definition and Mechanism
Photocatalysis is defined as a radiation-driven phenomenon that utilizes a substance known as a 'photocatalyst,' which is activated by either natural (solar) or artificial (ultraviolet lamps) radiation to accelerate a chemical reaction. This process is considered a clean technology as it operates without the use of corrosive materials and does not produce disinfection byproducts.[1.1] The fundamental mechanism of photocatalysis involves the interaction of a light source with the surface of semiconductor materials, leading to the generation of electron-hole pairs. These pairs are crucial for facilitating redox reactions, where the excited electrons interact with water molecules in the air, breaking them down into highly reactive hydroxyl radicals.[3.1] During the photocatalytic process, the generated electrons and holes can recombine, which can diminish the efficiency of the photocatalytic reaction. Therefore, reducing the recombination rate is essential for enhancing photocatalytic performance.[4.1] Various strategies have been employed to improve this aspect, such as optimizing the structural features of photocatalysts, including the use of phase hetero-junctions and noble-metal nanoparticles, which can extend the lifetime of excitons and improve electron-hole separation.[5.1] The ultimate goal of photocatalyst design is to facilitate effective reactions between excited electrons and oxidants, as well as between generated holes and reductants, to produce desired oxidized and reduced products.[5.1] The interest in photocatalysis has surged, particularly for applications such as wastewater treatment and solar energy harvesting, as demonstrated by early work in the 1970s that showcased the photocatalytic oxidation of cyanide ions using titanium dioxide (TiO2).[6.1] Despite significant advancements, challenges remain, including the need for new photocatalytic materials that exhibit increased effectiveness, selectivity, and reusability, as well as the optimization of semiconductor structures to enhance stability and performance under natural sunlight.[24.1]Types of Photocatalysis
Photocatalysis can be categorized into several types based on the mechanisms and materials used. One prominent type is photothermal catalysis, which combines the advantages of photocatalytic and thermochemical processes. This approach has garnered significant attention for its ability to drive energy-intensive reactions, such as CO2 reduction and pollutant decomposition, by efficiently utilizing the full solar spectrum. It captures both shorter- and longer-wavelength light, enhancing the overall effectiveness of photocatalytic processes.[28.1] Another widely studied type of photocatalysis involves the use of zinc oxide (ZnO), which has demonstrated effective photocatalytic degradation of organic compounds through an indirect pathway. ZnO is particularly noted for its high selectivity in environmental remediation applications.[18.1] Additionally, titanium dioxide (TiO2) photocatalysis is extensively utilized for water and waste treatment, addressing contaminants of emerging concern, pesticides, endocrine disruptors, and bacteria. Innovations in TiO2 photocatalysts, such as doping with nitrogen and copper, have been developed to enhance their activity under both UV and visible light, thereby improving their efficacy in wastewater treatment.[26.1] Furthermore, silver-based ternary composites have emerged as highly efficient photocatalysts due to their unique properties, including low toxicity, simple preparation, and the ability to harvest visible light up to near-infrared (NIR) regions. These materials facilitate greater charge carrier separation and transfer, which are crucial for photochemical reactions.[19.1] Despite the promise of these materials, challenges remain in producing photocatalysts that can operate effectively under visible light on a large scale, which is essential for addressing the environmental and energy issues associated with fossil fuel reliance.[27.1]In this section:
History
Early Discoveries
The early discoveries in photocatalysis can be traced back to the pioneering work of chemist Giacomo Ciamician, who conducted significant experiments as early as 1901. Ciamician was among the first to investigate whether "light and light alone" could facilitate chemical reactions, specifically noting that a chemical effect was observed only under blue light, while red light did not yield similar results.[62.1] His research culminated in a notable lecture in 1908, where he contrasted the harsh conditions of laboratory chemical synthesis with the mild conditions employed by green plants, emphasizing the potential of photochemical reactions for sustainable synthesis.[63.1] In the same year, Ciamician presented a comprehensive account of his work in molecular photochemistry, identifying various reactions induced solely by light, such as geometrical isomerization and cycloaddition reactions involving olefins.[64.1] He posited that solar light could provide a viable pathway for "green" synthetic methods, a concept that resonates with contemporary green chemistry principles.[65.1] Following Ciamician's foundational contributions, the field of photocatalysis advanced significantly with the pioneering work of Honda-Fujishima, who discovered photocatalysis using titania for photoelectrochemical water splitting.[74.1] However, early research encountered several challenges, including a prevalent misconception that solvent effects were uniform across different systems, which particularly affected studies in environmental remediation and hydrogen evolution.[75.1] Additionally, the early reliance on metal oxides, such as TiO2, which predominantly absorbed UV light due to their high band gap properties, limited the applicability of photocatalytic processes, particularly in the degradation of organic pollutants from industrial effluents.[77.1] As the field evolved, researchers began to address these misconceptions and limitations, leading to a more nuanced understanding of photocatalysis and its potential applications in developing pollution-free technologies.[74.1] The ongoing exploration of photocatalytic processes continues to build on the groundwork laid by early scientists like Ciamician, highlighting the importance of their contributions to the field.Development Through the Decades
The history of photocatalysis can be traced back to the early 20th century, with significant developments occurring over the decades. The term "photocatalysis" first emerged in 1910 within a textbook on photochemistry, marking the beginning of formal recognition of this phenomenon.[47.1] Early experiments by chemist Giacomo Ciamician in 1901 laid foundational work, as he investigated whether "light and light alone" could drive chemical reactions, discovering that chemical effects were observable only under blue light.[49.1] Throughout its history, photocatalysis has evolved significantly, drawing knowledge from various disciplines, including photochemistry, catalysis, and semiconductor physics, which have collectively shaped the understanding of the interactions between solids and radiation.[48.1] Research focus has also shifted over time, moving from inorganic oxides to more complex materials such as carbon and hybrid structures.[50.1] In recent decades, photocatalysis has garnered attention as a low-cost and environmentally friendly technology, particularly for its potential in water purification.[51.1] This interest has led to the development of numerous photocatalysts, enhancing the efficiency and applicability of photocatalytic processes in addressing global challenges such as water contamination.[80.1] The integration of nanotechnology has further advanced the field, with studies highlighting the effectiveness of nanosized ZnO-based structures in purifying air and water from pollutants and pathogens.[80.1]In this section:
Recent Advancements
Innovations in Photocatalytic Materials
Recent advancements in photocatalytic materials have significantly enhanced their efficiency and applicability in various fields, particularly in pollution mitigation and renewable energy generation. The evolution of photocatalysis can be traced back to the foundational research by Fujishima and Honda in 1972, which sparked interest in photo-electrochemical solar energy conversion and laid the groundwork for subsequent developments in the technology.[90.1] Over the decades, the focus of research has shifted from traditional inorganic oxides to more innovative materials, including carbon-based and hybrid compounds, which offer distinct advantages in photocatalytic applications.[93.1] Inorganic-organic hybrid materials have emerged as crucial components in photocatalysis due to their large specific surface area, which provides additional active sites for reactions and facilitates the transport of charge carriers.[99.1] These hybrid systems, particularly those that integrate photocatalytic materials with microbial processes, have demonstrated improved degradation efficiencies and reduced energy consumption compared to conventional technologies.[100.1] Furthermore, the combination of piezoelectric components with optical semiconductors in composite materials has optimized electron separation and migration, enhancing photocatalytic performance.[101.1] Carbon-based photocatalysts have garnered significant interest due to their cost-effectiveness and excellent quantum yield. Their unique characteristics, including non-toxicity, large surface area, and substantial pore volume, render them suitable for applications in hydrogen production through water splitting and the degradation of organic pollutants.[103.1] This paper provides an overview of the properties, performances, and combinations of different allotropes of carbon as photocatalysts, highlighting the advancements in photocatalytic efficiency achieved through solid Z-scheme heterojunctions.[104.1] To address the challenges of high charge recombination rates and poor carrier utilization in photocatalytic systems, researchers are exploring innovative strategies such as bandgap engineering, doping, and the development of composite photocatalysts.[114.1] Additionally, the integration of deep learning algorithms in photocatalyst design has provided transformative insights, allowing for a data-driven approach that accelerates the development of more effective photocatalytic materials.[116.1] This combination of advanced materials and innovative design strategies positions photocatalysis as a promising solution for addressing environmental pollution and energy crises.[117.1]Applications in Environmental Remediation
Photocatalysis has emerged as a significant technology in environmental remediation, particularly in the treatment of water and air pollutants. Its application in water treatment is notable for its ability to convert hazardous organic contaminants into non-toxic end products, thus providing a sustainable solution for purification processes.[96.1] The integration of photocatalytic technologies with existing systems can enhance their effectiveness, with potential configurations including pre-treatment, post-treatment, and hybrid processes that operate concurrently as separation and oxidation units.[95.1] Photocatalytic technologies hold significant promise for applications in water treatment; however, several challenges must be addressed to facilitate their widespread adoption. Key issues include the reusability and chemical stability of photocatalysts, low photoconversion efficiency, the costs associated with UV light sources, and the biological toxicity of certain photocatalysts.[97.1] Addressing these challenges is crucial for realizing the full potential of photocatalysis in water treatment. Developing novel photocatalytic materials, reactor designs, and operational strategies can help tackle these challenges, positioning photocatalysis as a sustainable solution for water treatment in the future.[98.1] Recent studies have highlighted the use of titanium dioxide (TiO2) photocatalysis for treating contaminants of emerging concern, such as pesticides and endocrine disruptors, utilizing both UV and visible light.[119.1] Innovations in photocatalytic materials, including solar-responsive catalysts and doped semiconductor metal sulfide nanostructures, have been developed to enhance photocatalytic activity and facilitate the degradation of large organic dyes in an eco-friendly manner.[119.1] Real-world applications of photocatalytic technologies have demonstrated their effectiveness in environmental cleanup. For instance, a photocatalytic reactor designed with a magnetic stirrer and UV lamp was reported to achieve complete inactivation of pathogenic bacteria within 60 minutes under specific light conditions.[121.1] This underscores the importance of optimizing photocatalyst properties and reaction conditions to improve performance.[122.1] Furthermore, ongoing research aims to develop advanced photocatalytic materials that are not only efficient but also cost-effective and stable for broader environmental remediation applications.[120.1]In this section:
Pollution MitigationRenewable EnergySolar Energy ConversionEnergy ConsumptionSemiconductors
Applications
Water Treatment
Photocatalysis has emerged as a promising technology for water treatment, addressing various contaminants and enhancing the quality of water resources. One of the primary applications of photocatalysis in this domain involves the treatment of water and wastewater, where it effectively degrades pollutants such as pesticides, endocrine disruptors, and bacteria using both ultraviolet (UV) and visible light irradiation.[147.1] The utilization of titanium dioxide (TiO2) as a photocatalyst has been particularly noteworthy, as it can be modified to enhance its activity under solar light, making it suitable for practical applications in environmental remediation.[147.1] Innovative approaches in photocatalytic water treatment include the development of TiO2 photocatalysts that are responsive to both UV and visible light, thereby improving the efficiency of contaminant degradation.[147.1] Additionally, advancements in the synthesis of photocatalysts, such as nitrogen and copper-doped TiO2, have shown promise in enhancing the photocatalytic activity for water decontamination.[147.1] The integration of novel materials and techniques, including the use of metal sulfide nanostructures, has further contributed to the effectiveness of photocatalytic processes in removing large organic dyes and other pollutants in an eco-friendly manner.[147.1] Photocatalysis presents a promising approach to addressing environmental challenges, particularly in the context of water treatment. This technology can theoretically be applied to a wide range of redox reactions that utilize light to activate photocatalysts, making it versatile for various applications.[134.1] One of the key advantages of photocatalysis is that it operates under mild conditions, eliminating the need for high temperatures or pressures, which enhances its appeal for sustainable practices.[134.1] Furthermore, photocatalysis offers solutions to the challenges posed by the intermittent nature of sunlight, which is recognized as a renewable energy source essential for powering activities on Earth.[137.1] Despite significant advancements in the field, several issues remain to be addressed, including the development of new photocatalytic materials with improved effectiveness, selectivity, and reusability.[136.1] Additionally, optimizing semiconductor structures to create more stable photocatalysts and enhancing photocatalytic reactions through external fields could lead to more efficient systems for environmental remediation and clean energy generation.[136.1] As research progresses, the potential for photocatalytic systems to improve water quality and contribute to cleaner water resources continues to grow, underscoring the importance of ongoing innovation in this area.[136.1]Energy Production
Photocatalysis has emerged as a significant technology in the field of energy production, particularly in the sustainable generation of hydrogen. Recent advancements in photocatalytic processes have demonstrated a substantial increase in hydrogen production rates compared to traditional methods. For instance, new synthesis methods for photocatalysts have achieved a hydrogen production rate that is 47 times greater than conventional techniques, reaching 235 μmolg −1 under 12 hours of solar light exposure and 9.8 mmolh −1 *g −1 with UV irradiation.[142.1] This remarkable enhancement underscores the potential of innovative photocatalytic materials in addressing energy needs sustainably. Among the various materials being explored for photocatalytic hydrogen production, oxide, selenide, and telluride-based photocatalysts (PTCs) have shown considerable promise due to their energy-efficient properties. Performance metrics for these materials indicate hydrogen evolution rates ranging from 0.47 mmol*h −1 g −1 for Ti@TiO2 to as high as 22.50 mmolh −1 *g −1, highlighting their effectiveness in hydrogen generation.[143.1] Photoelectrocatalytic hydrogen production, which utilizes solar energy to decompose water into hydrogen and oxygen, represents another avenue for sustainable energy technology. While this method offers environmental benefits, its low efficiency in photoelectric water splitting has limited its practical applications, resulting in relatively modest hydrogen production.[144.1] Research is also focusing on promising materials for effective water splitting. Metal oxides with low bandgaps, such as BiVO4, WO3, Fe2O3, Cu2O, and CuO, are considered among the most effective candidates for conducting water splitting, with ongoing efforts aimed at novel photocatalyst material design to enhance their efficiency.[162.1] Additionally, covalent organic frameworks (COFs) have emerged as a promising class of metal-free organic materials for photocatalytic water splitting, owing to their excellent surface area and tunable electronic properties.[163.1] These advancements in material science are crucial for improving the efficiency and viability of photocatalytic processes in hydrogen production, paving the way for more sustainable energy solutions.In this section:
Challenges And Future Perspectives
Current Limitations
Photocatalysis faces several inherent challenges that hinder its practical application and efficiency. One of the primary difficulties is achieving site- and stereoselectivity, which requires a fundamental understanding and control of catalyst-substrate interactions in both ground and excited states. These excited states are typically short-lived and high-energy intermediates, complicating the process further.[172.1] Photocatalysis is recognized as a promising technology due to its potential applications in degrading pollutants, reducing CO2 levels, and producing sustainable hydrogen fuel.[174.1] However, many areas of photocatalysis research, including solar water splitting, photocatalytic CO2 reduction, and nitrogen fixation, remain at the proof-of-concept stage, highlighting a significant gap between laboratory results and industrial application.[173.1] The design, construction, and scale-up of photocatalytic reactors for large-scale industrial applications present ongoing challenges. Critical considerations include ensuring adequate light penetration and catalyst activation, as well as addressing issues such as photon transfer limitations, mass transfer limitations, and oxygen deficiency.[179.1] Intensive research and development efforts are necessary to overcome these obstacles and facilitate the transition from laboratory-scale systems to practical industrial applications.[177.1] Furthermore, the commercial viability and environmental sustainability of photocatalytic technologies necessitate careful consideration of costs and life cycle assessments (LCA) of developed materials and processes. The application of photocatalytic methods in municipal wastewater treatment has been particularly hindered by these scale-up difficulties and associated costs.[180.1] To address these challenges, strategic development of efficient photocatalysts and optimization of reaction processes are essential. This includes enhancing light absorption, inhibiting photoelectron-hole recombination, and minimizing secondary pollution from by-products.[181.1] Overall, overcoming these limitations is crucial for advancing photocatalytic technologies toward practical and widespread industrial applications.Potential for Future Research
The potential for future research in photocatalysis is vast, particularly in addressing the challenges of catalyst design and efficiency. A significant challenge lies in the development of catalysts that exhibit both site- and stereoselectivity for C-H functionalization, which is crucial for enhancing the efficiency of photocatalytic processes.[182.1] Recent advancements have introduced design principles for topological-single-atom catalysts, which aim to achieve uniform, site-specific selectivity and activity, thereby improving catalytic performance.[183.1] Moreover, the copolymerization of CO2 with cyclohexene oxide using indium(III) phosphasalen catalysts exemplifies a promising area of research, as it contributes to the creation of sustainable polymers through homogeneous catalysis.[184.1] The ongoing exploration of photocatalytic reactor designs is also critical, as it addresses the scalability of photocatalytic systems for large-scale applications in water and air purification, as well as solar hydrogen production.[187.1] Despite the promise of photocatalysis in mitigating environmental issues, the production and application of effective photocatalysts that operate efficiently under visible light remain significant hurdles.[187.1] In terms of material properties, enhancing the efficiency of photocatalysts requires careful consideration of several factors, including the reduction of the band gap to improve visible-light utilization, increasing light absorption capacity, and ensuring rapid charge carrier transfer to minimize recombination rates.[191.1] Recent advancements in materials science have led to the development of novel photocatalysts, such as graphitic carbon nitride and metal-organic frameworks, which hold promise for applications in artificial photosynthesis, pollutant degradation, and other fields.[192.1] Furthermore, the rational design of photocatalysts based on a comprehensive understanding of their fundamental mechanisms is essential for improving industrial applications, particularly in the generation of hydrogen peroxide.[193.1] The exploration of new photocatalytic materials, including nanocomposites and heterojunctions, has shown potential for efficient wastewater treatment, highlighting the importance of continued research in this area.[194.1] Overall, the future of photocatalysis is poised for significant advancements, driven by innovative materials and designs that address current limitations and expand its applications in sustainability efforts.In this section:
Catalyst ActivationMass TransferEnvironmental SustainabilityLife Cycle AssessmentsMunicipal Wastewater
Interdisciplinary Approaches
Collaboration Across Scientific Fields
The interdisciplinary nature of photocatalysis has led to significant advancements in various scientific fields, including photochemistry, physical chemistry, surface science, and materials science. This collaboration has fostered the development of numerous characterization methods that exhibit high sensitivity, selectivity, and spatial, temporal, and spectral resolutions, which are essential for understanding the complex mechanisms involved in photocatalytic processes.[208.1] Photocatalysis is recognized for its versatility and rapid development, with applications that span artificial photosynthesis, photo-biocatalysis, and sustainable synthesis, among others.[209.1] The integration of knowledge from different disciplines has been crucial in addressing the challenges associated with photocatalytic systems, such as the need for new materials with enhanced effectiveness, selectivity, and reusability.[210.1] Moreover, interdisciplinary approaches have facilitated the exploration of innovative methods to optimize semiconductor structures, leading to the creation of more stable photocatalysts with desirable properties such as self-cleaning and flame resistance.[210.1] This collaborative effort is vital for advancing photocatalytic technologies that can effectively contribute to environmental remediation and clean energy generation, particularly in the context of utilizing natural sunlight to enhance photocatalyst lifespan.[210.1]Integration with Artificial Photosynthesis
The integration of advanced materials, such as biochar, semiconductors, and magnetic materials, plays a crucial role in enhancing solar-driven photocatalysis, particularly in the context of artificial photosynthesis. This synergistic approach not only improves the efficiency of photocatalytic systems but also addresses scalability challenges for industrial applications. Biochar contributes significantly by reducing the band gaps of semiconductors, which enhances their photocatalytic activity and improves adsorption properties, thereby facilitating the degradation of organic pollutants.[221.1] Furthermore, the incorporation of magnetic materials allows for the efficient recovery and reuse of photocatalysts, which is essential for sustainable practices in artificial photosynthesis.[221.1] This integration of materials exemplifies how interdisciplinary approaches can lead to advancements in photocatalytic technologies, making them more viable for large-scale implementation.In this section:
Conclusion
Implications for Sustainability
Photocatalysis presents significant implications for sustainability, particularly in addressing environmental challenges through its diverse applications. It is recognized for its potential in pollutant degradation, CO2 reduction, hydrogen production, nitrogen fixation, and antibacterial activity, making it an attractive option for achieving environmental sustainability.[249.1] The technological and economic importance of photocatalysis has notably increased in the 21st century, highlighting its relevance in environmental applications.[250.1] Recent advancements in photocatalytic materials, particularly bismuth-based nanophotocatalysts, have shown promise for energy and environmental applications, indicating a shift towards more effective photocatalytic systems.[251.1] The rapid development in this field has inspired global research efforts aimed at enhancing the understanding of key problems associated with nanostructured photocatalysts in environmental applications.[252.1] Specific applications of TiO2 photocatalysis have been explored for water and waste treatment, effectively addressing contaminants of emerging concern, pesticides, endocrine disruptors, and bacteria.[253.1] However, challenges remain in optimizing photocatalytic materials for enhanced effectiveness, selectivity, and reusability, as well as in developing systems that can operate efficiently under natural sunlight.[254.1] The integration of photocatalytic systems into industrial processes, such as pharmaceuticals, could lead to significant cost reductions, although achieving high efficiency and low capital costs remains a challenge.[255.1] Pilot applications for large-scale water and air purification and solar hydrogen production have been initiated, yet the scalability of photocatalytic systems continues to pose significant hurdles.[256.1] Future research must focus on expanding the practical applications of photocatalytic technology in industrial settings, addressing issues such as cost-effectiveness and scalability.[257.1] Notably, dual Z-scheme photocatalytic systems have demonstrated improved efficiency in dye degradation, yet they still face challenges in broader industrial applications.[258.1] Technological advancements in materials science and nanotechnology, driven by photocatalysis research, are essential for the development of sustainable technologies and renewable energy solutions.[259.1] Recent studies have highlighted the importance of visible light-driven photocatalysis, particularly using titanium oxide, while also addressing the challenges and perspectives that lie ahead.[260.1] Understanding the mechanisms behind photocatalysis is crucial for leveraging its potential in environmental preservation.[261.1]References
[1] Photocatalysis Explained - Eolisair — What is Photocatalysis and how does it work?Photocatalysis is a radiation-driven phenomenon that makes use of a substance known as 'photocatalyst' which is activated by either natural (solar) or artificial (ultraviolet lamps) radiation to speed up a chemical reaction. Photocatalysis is a clean technology because it is chemical-free - without corrosive materials and disinfection byproducts.
[3] How do photocatalytic air purifiers work? - Explain that Stuff — Photocatalysis means light is involved in making a catalyst do its job. In other words, light provides the energy that allows the catalyst to work. ... It's the electrons that do the useful work for us. The electrons interact with water molecules (H 2 O) in the air, breaking them up into hydroxyl radicals (OH·), which are highly reactive
[4] Photocatalysis - an overview | ScienceDirect Topics — During photocatalysis, the electrons and holes can recombine after being formed. Therefore, to improve photocatalytic performance, the recombination rate must be reduced and minimized. Despite a lot of work been done on basic photocatalytic research, there is still a vast gap between laboratory, industry, and applied applications.
[5] Photocatalysis - Wikipedia — Such exciton recombination is undesirable and higher levels cost efficiency. Efforts to develop functional photocatalysts often emphasize extending exciton lifetime, improving electron-hole separation using diverse approaches that may rely on structural features such as phase hetero-junctions (e.g. anatase-rutile interfaces), noble-metal nanoparticles, silicon nanowires and substitutional cation doping. The ultimate goal of photocatalyst design is to facilitate reactions of the excited electrons with oxidants to produce reduced products, and/or reactions of the generated holes with reductants to produce oxidized products. Due to the generation of positive holes (h+) and excited electrons (e−), oxidation-reduction reactions take place at the surface of semiconductors irradiated with light.
[6] Photocatalysts - an overview | ScienceDirect Topics — This work sparked much interest in harvesting solar energy using photocatalysis and photoelectrocatalysis for driving uphill reactions like water splitting. - In 1977 Frank and Bard propose to use photocatalysis to clean wastewater and demonstrate photocatalytic oxidation of cyanide ions using TiO 2 .
[18] Novel 3D composite for efficient photocatalysis in environmental ... — Zinc oxide is one of the most studied material for environmental remediation and shows good photocatalytic degradation of organic compounds with high selectivity 52 through an indirect pathway
[19] Advances in designing Ag-based ternary photocatalysts for energy and ... — In conclusion, Ag-based ternary composites have been considered highly efficient photocatalysts due to their unique properties, such as low toxicity, simple preparation, SPR effect, visible light harvesting properties up to NIR regions and, finally, greater charge carrier separation and transfer to the surface of catalysts for participating in photochemical reactions. Li, S.Y., Zhang, M., Qu, Z.H., Cui, X., Liu, Z.Y., Piao, C.C., Li, S.G., Wang, J., Song, Y.T.: Fabrication of highly active Z-scheme Ag/g-C3N4-Ag-Ag3PO4 (1 1 0) photocatalyst photocatalyst for visible light photocatalytic degradation of levofloxacin with simultaneous hydrogen production. Li, S.Y., Zhang, M., Qu, Z.H., Cui, X., Liu, Z.Y., Piao, C.C., Li, S.G., Wang, J., Song, Y.T.: Fabrication of highly active Z-scheme Ag/g-C3N4-Ag-Ag3PO4 (1 1 0) photocatalyst photocatalyst for visible light photocatalytic degradation of levofloxacin with simultaneous hydrogen production.
[24] Principles of Photocatalysts and Their Different Applications: A Review — Even if there has been a lot of progress, the following problems still need to be solved in the future: (1) there is a chance to create new photocatalytic materials with increased effectiveness, selectivity, and reusability by the synthesis of novel materials or modification of existing materials; (2) one novel method for enhancing the photocatalytic performance of semiconductors in a variety of applications is to optimize the semiconductor structure for the creation of flexible and more stable photocatalysts with self-cleaning and flame-resistance qualities; (3) from the economical point of view, it is promising to create photocatalytic systems that are active in the presence of natural sunlight, to significantly increase the photocatalyst lifespan; (4) enhancing photocatalytic reactions by using different types of external field, such as magnetic, electric, and piezoelectric fields, might result in the creation of more effective photocatalysts by improving light absorption, charge separation, and surface reactions; (5) to create more efficient photocatalytic systems for the generation of clean energy and environmental remediation, enhanced characterization investigations might also be carried out to get a better knowledge of the kinetics and processes of the photocatalytic reactions.
[26] Recent advances in photocatalysis for environmental applications — This review also discusses the use of TiO2 photocatalysis for water and waste treatment, treating contaminants of emerging concern (CECs), pesticides, endocrine disrupters (EDs) and bacteria using both UV and visible light irradiations. There a number of ways to improve the rate of photocatalytic activity and producing a TiO2 photocatalyst that utilises both UV and visible light. Photocatalysis with solar energy: sunlight-responsive photocatalyst based on TiO 2 loaded on a natural material for wastewater treatment Nitrogen and copper doped solar light active TiO 2 photocatalysts for water decontamination To overcome the environmental pollution, doped and heterojunction based semiconductor metal sulfide nanostructures (MSNSs) are developed as photocatalysts for the purpose of photocatalytic degradation or removal of large organic dyes in an eco-friendly and sustainable fashion.
[27] Photocatalysts for a sustainable future: Innovations in large-scale ... — Although photocatalysis is a promising technology that could partially solve the environmental and energy problems associated with excessive use of fossil fuels, the production and application of photocatalysts capable of operating in visible light on a large scale remains an unsolved problem (J. Chen et al., 2022a; Ozin, 2022; Patowary and Kalita, 2022).
[28] Advances in Photothermal Catalysis: Mechanisms, Materials, and ... — Photothermal catalysis integrates the strengths of photocatalytic and thermochemical processes and has gained significant attention in driving energy-consuming reactions such as CO2 reduction and pollutant decomposition. It is of particular interest for efficient utilization of the full solar spectrum via capturing shorter- and longer-wavelength light for photocatalysis and photothermal
[47] Photocatalysis - an overview | ScienceDirect Topics — 1.2.2 History of photocatalysis. From a historical point of view, photocatalysis is an old phenomenon. However, the question of exactly where it originates remains to be uncertain. From the record that can be found, the emergence of the term, "photocatalysis," dates back to 1910 in a textbook on photochemistry. Afterward, scientists from
[48] A Historical Introduction to Photocatalysis | SpringerLink — Therefore, it seems clear that photocatalysis, along its already centennial history, has acquired knowledge from very different disciplines. Evidently, photochemistry, catalysis and, to a lesser extent, semiconductor physics have historically shaped our understanding of this phenomena, which depends on the solid interactions with radiation but
[49] Photocatalysis: Basic Principles, Diverse Forms of Implementations and ... — 3.1 History of Photocatalysis. As early as 1901, chemist Giacomo Ciamician was one of the first to conduct experiments to study whether "light and light alone" would enable chemical reactions. 25 He carried out experiments with blue and red lights and found that a chemical effect took place only in blue light. He was careful enough to
[50] (PDF) More than One Century of History for Photocatalysis, from Past ... — The analysis of the most-investigated topics in the field of photocatalysis highlighted that, during its history, the focus of the research moved from inorganic oxides to carbon and hybrid materials.
[51] Historical development and prospects of photocatalysts for pollutant ... — Photocatalysis, as a low-cost and environment friendly technology, has demonstrated a significant potential for water pollution purification; it has received extensive attention in recent decades. The key is the photocatalyst; a large number of photocatalysts have been developed. To better understand and further develop the photocatalysis
[62] Photocatalysis: Basic Principles, Diverse Forms of Implementations and ... — As early as 1901, chemist Giacomo Ciamician was one of the first to conduct experiments to study whether "light and light alone" would enable chemical reactions. 25 He carried out experiments with blue and red lights and found that a chemical effect took place only in blue light. He was careful enough to exclude the possibility that these
[63] 1908: Giacomo Ciamician and the Concept of Green Chemistry — Giving the "green" light: In a lecture held before the Société Française de Chimie in Paris in 1908, Giacomo Ciamician contrasted the harsh conditions of chemical synthesis in the laboratory with the mild syntheses carried out by green plants.Ciamician's research, with its focus on photochemical reactions, revealed already 100 years ago several of the tenets of contemporary sustainable
[64] The 'belle époque' of photochemistry | Photochemical ... - Springer — In 1908 the pioneer of photochemistry, Giacomo Ciamician, presented a comprehensive account on his ongoing work in molecular photochemistry. He reported a number of reactions caused by light and ascertained that these were caused by light alone, not heat. These included geometrical isomerization of C=C, C=N and N=N bonds, 2 + 2 cycloaddition involving olefins as well as α,β-unsaturated
[65] Green chemistry and photochemistry were born at the same time — Where to look for really 'green' synthetic methods, under conditions as mild as those nature uses? A hundred years ago, a great scientist, Giacomo Ciamician, confronted the problem. He had no doubt of the answer: it was solar light. The approach and the discoveries by Ciamician are illustrated in connection with present-day green chemistry.
[74] Introduction, basic principles, mechanism, and challenges of ... — Photocatalysis was first discovered by Honda-Fujishima, using titania that is based on photoelectrochemical water splitting .Photocatalysis as a rapidly developing field of research has high potential for a wide range of applications in industries to provide a solution for clean energy and environment by developing pollution-free technologies .
[75] The overlooked solvent effects: a reconsideration of the paradigm in ... — As metal oxides dominated the early years of semiconductor photocatalysis research, employed light sources mostly emitted UV light. ... Additionally, there seems to have been an early misconception that solvent effects were uniform, particularly in the study of widely researched systems like environmental remediation and hydrogen evolution.
[77] Fundamentals and misconceptions in photocatalysis — Intensive research work is being undertaken globally to effectively use the process of photocatalysis for the degradation of organic pollutants from industrial effluents. For the same, TiO 2 has been extensively explored, which however, has a limitation of being able to utilise the UV spectrum only, due to its high band gap property. Since a
[80] Photocatalysis with the Use of ZnO Nanostructures as a Method for the ... — At the present time, the photocatalytic properties of nanosized ZnO based structures are investigated along a wide front of studies, which open opportunities for the application of this material for the solution of such global-scale problems as air and water purification from contaminants and pathogenic microorganisms.
[90] Photocatalysis - an overview | ScienceDirect Topics — 5.1 Background. Initial interest in environmental photocatalysis began in 1972 and initiated by Fujishima and Honda׳s research on photo-electrochemical solar energy conversion. ... Photocatalysis is an emerging technology that has gained much attention in air and water pollution control.
[93] (PDF) More than One Century of History for Photocatalysis, from Past ... — The analysis of the most-investigated topics in the field of photocatalysis highlighted that, during its history, the focus of the research moved from inorganic oxides to carbon and hybrid materials.
[95] Photocatalysis coupling with membrane technology for sustainable and ... — These advantages make it an attractive option for various applications in water treatment, air purification, and energy production. Photocatalysis can be integrated with membrane filtration in different ways, such as pre-treatment, post-treatment, and hybrid processes where the system operates concurrently as separation and oxidation units.
[96] Photocatalytic Reactor Modelling Incorporating Computational Fluid ... — Photocatalysis is a potent, advanced oxidation process that is effective in converting hazardous organic contaminants into non-toxic end products, offering a sustainable solution for water and air purification. The degradation process in photocatalysis is primarily influenced by several critical factors, including the illumination source, catalyst (either in the form of a slurry or immobilized
[97] Application of Photocatalysis in Water/Wastewater Treatment: Latest ... — The major challenges restraining the commercialization for photocatalytic application need to be considered in real water and wastewater treatment; these include the reusability of photocatalysts, chemical stability, the low photoconversion efficiency, cost estimation associated with the UV source, the biological toxicity of photocatalysts, etc
[98] Photocatalysis in Wastewater Treatment: Harnessing the Power of Light — Addressing these challenges is crucial for realizing the full potential of photocatalysis in water treatment. Developing novel photocatalytic materials, reactor designs, and operational strategies can help tackle these challenges. Future Outlook. Looking ahead, it is clear that photocatalysis is a sustainable solution for water treatment.
[99] Inorganic-organic hybrid photocatalysts: Syntheses, mechanisms, and ... — Inorganic-organic hybrid materials are crucial in the field of photocatalysis .Compared with traditional photocatalysts, inorganic-organic hybrid materials have the following advantages (Fig. 1). (1) Large specific surface area: the large specific surface area of organic components in hybrid materials provides additional active sites for photocatalysis and facilitates the transport
[100] Photocatalytic Material-Microorganism Hybrid System and Its Application ... — By combining the advantages of photocatalysis and bacterial degradation, pollution can be better degraded . Compared with conventional technologies, the photocatalytic material-microorganism hybrid system reduces the energy consumption generated by a high aeration rate and it significantly improves the degradation efficiency.
[101] Hybrid piezo-photocatalysts: Harnessing dual functionalities for ... — Composite or hybrid materials typically consist of a piezoelectric component and an optical semiconductor component. ... Optimizing electron separation and migration is one of the key advantages of piezo-photocatalysis. Nevertheless, for composite or hybrid materials, the effect of piezoelectric polarization on the semiconductor is more
[103] Carbon-based photocatalysts for hydrogen production: A review — Carbon-based compounds are both cheap and also have an excellent quantum yield. Moreover, their peculiar form, non-toxicity, large surface area, and pore volume make them suitable photocatalysts for H2 production.
[104] Carbon-Based Nanomaterials via Heterojunction Serving as Photocatalyst — This paper aims to provide an overview of carbon-based photocatalysts in water splitting for H 2 production as well as degradation of organic pollutants. The properties, performances, and combinations of different allotropes of carbon as photocatalysts were discussed. Photocatalytic enhancements by solid Z-scheme heterojunction were also reviewed.
[114] Photocatalytic Technologies for Transformation and Degradation of ... — To address these challenges, researchers are exploring various strategies, including bandgap engineering, doping, and the development of composite photocatalysts to enhance the performance of ZnO-based photocatalytic systems for efficient MP degradation.
[116] Transformative strategies in photocatalyst design: merging ... — This review offers a comprehensive summary of deep-learning-assisted photocatalyst design, offering transformative insights that not only enhance the development of photocatalytic technologies but also expand the practical applications of photocatalysis in various domains. Deep learning algorithms, trained on extensive datasets of material properties and photocatalytic performance, reveal intricate correlations between structural characteristics and photocatalytic activity, providing a data-driven approach to more effective photocatalyst design. This integrated approach of computational modeling and deep learning accelerates the design process and significantly elevates photocatalyst performance, addressing the fundamental limitations of traditional methodologies. The workflow for deep-learning-assisted photocatalyst design is outlined, emphasizing how data collection, feature engineering, model training, and validation are integrated with machine learning models to guide experimental validation and enhance predictive capabilities.
[117] Photocatalytic systems: reactions, mechanism, and applications — Photocatalytic technologies have shown a lot of promise in recent years for reducing environmental pollution and energy crises. 1,2 One notable benefit of visible-light-driven photocatalysis is its ability to effectively use solar radiation's enormous energy content as a clean, affordable, and renewable driving force. Because visible-light
[119] Recent advances in photocatalysis for environmental applications — This review also discusses the use of TiO2 photocatalysis for water and waste treatment, treating contaminants of emerging concern (CECs), pesticides, endocrine disrupters (EDs) and bacteria using both UV and visible light irradiations. There a number of ways to improve the rate of photocatalytic activity and producing a TiO2 photocatalyst that utilises both UV and visible light. Photocatalysis with solar energy: sunlight-responsive photocatalyst based on TiO 2 loaded on a natural material for wastewater treatment Nitrogen and copper doped solar light active TiO 2 photocatalysts for water decontamination To overcome the environmental pollution, doped and heterojunction based semiconductor metal sulfide nanostructures (MSNSs) are developed as photocatalysts for the purpose of photocatalytic degradation or removal of large organic dyes in an eco-friendly and sustainable fashion.
[120] Advanced Photocatalytic Materials for Environmental Remediation — Continued advancements aim to optimize performance and scalability for widespread environmental remediation. The primary goal of this research is to develop and optimize advanced photocatalytic materials that exhibit high efficiency, stability, and cost-effectiveness for environmental remediation applications. Specifically, the research aims to: 1.
[121] A review on photocatalytic remediation of environmental pollutants and ... — The photocatalytic reactor was fabricated with a magnetic stirrer, air filter, and vessel with 20 W of UV lamp (Philips Co. Holland). The study reported that the photocatalytic reaction took 60 min for the complete killing of pathogenic bacteria under a light intensity of 1 W/m 2 and 360 nm.
[122] Dynamic in-situ reconstruction of active site circulators for photo ... — This study underscores the importance of photocatalyst optical properties and the selection of appropriate reaction conditions for improving the photocatalytic performance of the designed system
[134] Photocatalysis - an overview | ScienceDirect Topics — The potential applications of photocatalysis are widespread since theoretically it can be adopted in every redox reaction which employs light to activate photocatalysts. And it is also appealing since it occurs under mild conditions, without high temperature or high pressure. By mimicking the photosynthesis of green plants, photocatalysis has
[136] Principles of Photocatalysts and Their Different Applications: A Review — Even if there has been a lot of progress, the following problems still need to be solved in the future: (1) there is a chance to create new photocatalytic materials with increased effectiveness, selectivity, and reusability by the synthesis of novel materials or modification of existing materials; (2) one novel method for enhancing the photocatalytic performance of semiconductors in a variety of applications is to optimize the semiconductor structure for the creation of flexible and more stable photocatalysts with self-cleaning and flame-resistance qualities; (3) from the economical point of view, it is promising to create photocatalytic systems that are active in the presence of natural sunlight, to significantly increase the photocatalyst lifespan; (4) enhancing photocatalytic reactions by using different types of external field, such as magnetic, electric, and piezoelectric fields, might result in the creation of more effective photocatalysts by improving light absorption, charge separation, and surface reactions; (5) to create more efficient photocatalytic systems for the generation of clean energy and environmental remediation, enhanced characterization investigations might also be carried out to get a better knowledge of the kinetics and processes of the photocatalytic reactions.
[137] Photocatalysis: Basic Principles, Diverse Forms of Implementations and ... — Photocatalysis promises a solution to challenges associated with the intermittent nature of sunlight which is considered as renewable and ultimate energy source to power activities on Earth. This review aims to provide a broad overview of the field. ... The lack of detailed information has been an important reason why full photocatalytic water
[142] An overview of photocatalyst eco-design and development for green ... — This process increased the hydrogen production rate by 47 times compared to traditional material synthesis methods, reaching a rate of 235 μmol*g −1 under 12 h of solar light exposure and 9.8 mmol*h −1 *g −1 with UV irradiation. These results demonstrate that developing new synthesis methods for photocatalysts to enhance their
[143] Advances in photothermal catalysts for solar-driven hydrogen production — The energy-efficient nature of oxide, selenide, and telluride-based PTCs makes them prime candidates for sustainable H2 production when compared to traditional materials. By analyzing a range of materials, we summarize key performance metrics, including hydrogen evolution rates ranging from 0.47 mmolh −1 g −1 for Ti@TiO 2 to 22.50 mmolh −
[144] Photoelectrocatalytic hydrogen production: Hydrogen production ... — Photoelectrocatalytic hydrogen production is a sustainable energy technology that utilizes solar energy to decompose water into hydrogen and oxygen. It offers the advantages of environmental protection and sustainability. However, its low efficiency in photoelectric water splitting results in relatively small hydrogen production, which severely limits its popularization in practical applications.
[147] Recent advances in photocatalysis for environmental applications — This review also discusses the use of TiO2 photocatalysis for water and waste treatment, treating contaminants of emerging concern (CECs), pesticides, endocrine disrupters (EDs) and bacteria using both UV and visible light irradiations. There a number of ways to improve the rate of photocatalytic activity and producing a TiO2 photocatalyst that utilises both UV and visible light. Photocatalysis with solar energy: sunlight-responsive photocatalyst based on TiO 2 loaded on a natural material for wastewater treatment Nitrogen and copper doped solar light active TiO 2 photocatalysts for water decontamination To overcome the environmental pollution, doped and heterojunction based semiconductor metal sulfide nanostructures (MSNSs) are developed as photocatalysts for the purpose of photocatalytic degradation or removal of large organic dyes in an eco-friendly and sustainable fashion.
[162] 2023 roadmap on photocatalytic water splitting - IOPscience — The metal oxides with a low bandgap, such as BiVO 4, WO 3, Fe 2 O 3, Cu 2 O, CuO, etc, are among the most promising materials for conducting water splitting [55-57]. The present perspective for effective water splitting depends on a novel PC material design.
[163] Recent Advances in Organic Photocatalysts for Solar Water Splitting — Emerging in recent years, COFs are another promising metal-free organic materials for photocatalytic water splitting because of their excellent surface area and electronic property tunability (Figure 5a). 40 - 43 By approaching the computational assistance from first-principles calculations to topological assembly, Wan et al. 44 designed 12
[172] Challenges and Future Perspectives in Photocatalysis: Conclusions from ... — An inherent challenge in photocatalysis is to achieve site- and stereoselectivity. Contrary to classical enantioselective catalysis, one has to fundamentally understand and control the catalyst-substrate interactions in the ground and excited states. The latter are typically short-lived, high-energy intermediates, which adds to the challenge.
[173] Promises and Challenges in Photocatalysis - Frontiers — The grand challenge of photocatalysis today is to further expand the practical application of photocatalytic technology in the industrial field, which requires future research to pay attention to the following aspects: As for other photocatalysis research fields, such as solar water splitting (Mi et al., 2021), photocatalytic CO2 reduction (He et al., 2019), photocatalytic CH4 activation (Ma et al., 2021), nitrogen fixation (Chen et al., 2020), and photocatalytic fine chemicals synthesis (Leng et al., 2020; Tan et al., 2021), they often stuck at the proof-of-concept level. Lu, K.-Q., Li, Y.-H., Zhang, F., Qi, M.-Y., Chen, X., Tang, Z.-R., et al. Tan, Y.-X., Chai, Z.-M., Wang, B.-H., Tian, S., Deng, X.-X., Bai, Z.-J., et al.
[174] Photocatalyst: mechanism, challenges, and strategy for organic ... — Photocatalysis is one of the promising technologies because of its potential application in degrading pollutants, reducing CO 2 levels, and producing sustainable hydrogen (H 2) fuel.Though inorganic semiconductors have shown tremendous progress in different fields of application, there are some inherent challenges in these photocatalysts.
[177] Photocatalytic reactors: Technological status, opportunities, and ... — The design, construction, and scale-up of photocatalytic reactors for large-scale industrial applications is still an open problem. Considering the technologic point of view, intensive efforts of research and development have been invested to help overcome different problems in bulk reactors such as photon transfer limitation, mass transfer limitation, oxygen deficiency, and lack of reaction
[179] Editorial: Air and Water Purification Processes through ... - MDPI — Moreover, scaling up photocatalytic systems from the lab to industrial applications involves several critical considerations. First and foremost, the design and optimization of photocatalytic reactors must ensure adequate light penetration and catalyst activation [ 3 ].
[180] Toward Scaling-Up Photocatalytic Process for Multiphase ... - MDPI — The commercial viability and environmental sustainability of the photocatalytic technology require more attention to the determination of the costs and LCA analysis of the developed materials and processes. The application of photocatalytic remediation to municipal wastewater treatment has been so far hindered by scale-up difficulties and costs
[181] Challenges of photocatalysis and their coping strategies - Cell Press — The strategic development of efficient photocatalysts and photocatalytic reaction technologies is crucial for coping with the challenges of photocatalysis in practical applications. Optimizing the photocatalytic reaction process can also improve the photocatalytic efficiency by inhibiting photoelectron-hole recombination, diminishing secondary pollution from by-products, and avoiding poisoning
[182] Design of catalysts for site-selective and enantioselective ... - Nature — A major challenge is to design catalysts to control both the site- and stereoselectivity of the C-H functionalization. ... by appropriate design of the catalyst, site-selective C-H
[183] Designer topological-single-atom catalysts with site-specific ... — Designing catalysts with uniform, site-specific selectivity and activity is a significant challenge. This study introduces design principles for topological-single-atom catalysts that utilize
[184] Mechanism and Design Principles for Controlling Stereoselectivity in ... — Copolymerization of CO2 with cyclohexene oxide (CHO) creates a sustainable polymer that has been a target for homogeneous catalysis. In particular, indium(III) phosphasalen catalysts generate high
[187] Photocatalysts for a sustainable future: Innovations in large-scale ... — Pilot applications of photocatalytic reactors for large-scale water and air purification and solar hydrogen production. The purpose of this article is to provide a detailed description of the primary challenges and potential solutions encountered in scaling up photocatalytic systems for use in large-scale water and air purification and solar hydrogen production. Although photocatalysis is a promising technology that could partially solve the environmental and energy problems associated with excessive use of fossil fuels, the production and application of photocatalysts capable of operating in visible light on a large scale remains an unsolved problem (J. To achieve the full efficiency of the photocatalytic process, the main problems hindering large-scale photocatalytic applications for environmental cleaning and solar hydrogen generation must be solved.
[191] Semiconductor photocatalysts: A critical review highlighting the ... — An effective photocatalytic system must address the corresponding requirements: (a) the photonic band gap of the catalyst should be sufficiently narrow to assimilate the maximum solar spectrum; (b) high separation with subsequent rapid transfer of photoinduced charge carriers (e−/h+) to the surface of the photocatalyst to minimize their recombination rate; (c) the smooth occurrence of surface redox reactions due to the contribution of charges; (d) the prevention of backward reaction to improve the photocatalytic efficiency . We also supply a comprehensive overview of the research status of DFT for piezo-photocatalyst prediction and reaction mechanism analysis and elucidate the construction strategies (doping, crystal facet control, phase structure, surface modification, morphology, co-catalyst modification, composite hybridization, etc.) of the piezo-photocatalytic system and the underlying mechanisms for enhancing the catalytic performance.
[192] Photocatalytic Materials and Photocatalytic Reactions - MDPI — In recent decades, photocatalysis has attracted extensive and ongoing attention, because it exhibits great potential for applications in artificial photosynthesis, including H2 production and CO2 reduction, organic synthesis, pollutant degradation, N2 fixation, precious metal recovery, H2O2 photosynthesis, life science and medical research, space exploration, and other related fields (Figure 1) . Meanwhile, photocatalysts have evolved from inorganic substances to new nanomaterials such as graphitic carbon nitride (g-C3N4), polymers, piezoelectric materials, ferroelectric materials, metal–organic frameworks (MOFs), covalent organic frameworks (COFs), single-atom catalysts (SACs), high-entropy alloys (HEAs), supramolecules, superlattices, topological insulators, localized surface plasmon resonance (LSPR), and diverse composite materials/heterojunctions, among other things (Figure 2) . This Special Issue contains 23 original research articles related to photocatalytic materials, including metal oxides, metal sulfides, metal nitrides, metallo-organic compounds, g-C3N4, clusters, LSPR, and heterojunction/composite materials.
[193] Advances in Constructing Efficient Photocatalytic Systems for Hydrogen ... — The rational design of novel photocatalysts, grounded in a deep understanding of their fundamental mechanisms, is essential for improving the efficiency of H 2 O 2 generation and for advancing its industrial applications. Key factors such as band gap, light absorption properties, and stability under reaction conditions must be carefully considered.
[194] Recent advances in photocatalytic materials and their applications for ... — Recent advances in photocatalytic materials and their applications for treatment of wastewater: A review - ScienceDirect Facile solvothermal fabrication of cubic-like reduced graphene oxide/AgIn5S8 nanocomposites with anti-photocorrosion and high visible-light photocatalytic performance for highly-efficient treatment of nitrophenols and real pharmaceutical wastewater One-step hydrothermal fabrication of visible-light-responsive AgInS2/SnIn4S8 heterojunction for highly-efficient photocatalytic treatment of organic pollutants and real pharmaceutical industry wastewater Critical review on wastewater treatment using photo catalytic advanced oxidation process: Role of photocatalytic materials, reactor design and kinetics Therefore, semiconductor (BiVO4, ZnWO4, Ag3PO4, NiFe2O4, MgFe2O4, ZnO, CeO2, MoS2, CdS, NiO and TiO2) photocatalysts have risen as a hopeful environmentally friendly technology for organic pollutant degradation, boasting multiple advantages such as elevated efficiency, minimal energy usage, cost-efficient and effective wastewater refinement [7–14].
[208] Heterogeneous photocatalysts: an overview of classic and modern ... — With the interdisciplinary nature of the photo (electro)catalysis field, numerous characterization methods, particularly those with high sensitivity, selectivity, spatial, temporal, and spectral resolutions, have been greatly developed in the past few decades targeting at the photochemistry, physical chemistry, surface science, and materials
[209] PDF — ABSTRACT: Photocatalysis is a versatile and rapidly developing field with applications spanning artificial photosynthesis, photo-biocatalysis, photoredox catalysis in solution or supramolecular structures, utilization of abundant metals and organocatalysts, sustainable synthesis, and plastic degradation. In this Perspective, we summarize conclusions from an interdisciplinary workshop of young
[210] Principles of Photocatalysts and Their Different Applications: A Review — Even if there has been a lot of progress, the following problems still need to be solved in the future: (1) there is a chance to create new photocatalytic materials with increased effectiveness, selectivity, and reusability by the synthesis of novel materials or modification of existing materials; (2) one novel method for enhancing the photocatalytic performance of semiconductors in a variety of applications is to optimize the semiconductor structure for the creation of flexible and more stable photocatalysts with self-cleaning and flame-resistance qualities; (3) from the economical point of view, it is promising to create photocatalytic systems that are active in the presence of natural sunlight, to significantly increase the photocatalyst lifespan; (4) enhancing photocatalytic reactions by using different types of external field, such as magnetic, electric, and piezoelectric fields, might result in the creation of more effective photocatalysts by improving light absorption, charge separation, and surface reactions; (5) to create more efficient photocatalytic systems for the generation of clean energy and environmental remediation, enhanced characterization investigations might also be carried out to get a better knowledge of the kinetics and processes of the photocatalytic reactions.
[221] Enhancing solar-driven photocatalysis: Synergistic integration of ... — Enhancing solar-driven photocatalysis: Synergistic integration of biochar, semiconductors, and magnetic materials for degrading organic pollutants - ScienceDirect Enhancing solar-driven photocatalysis: Synergistic integration of biochar, semiconductors, and magnetic materials for degrading organic pollutants open access Biochar, semiconductors, and magnetic materials enhance solar-driven photocatalysis. This review investigates the enhancement of solar-driven photocatalysis, an advanced oxidation process, through the synergistic integration of biochar, semiconductors, and magnetic materials. The study highlights the role of biochar in reducing the band gaps of semiconductors and improving adsorption properties, while magnetic materials enable efficient recovery and reuse of photocatalysts. Previous article in issue Next article in issue Recommended articles No articles found. For all open access content, the Creative Commons licensing terms apply.
[249] Current trends in environmental and energy photocatalysis and ISO ... — Photocatalysis is considered an attractive option due to its potential for achieving environmental sustainability, particularly owing to its versatility in applications such as pollutant degradation, CO 2 reduction, hydrogen production, nitrogen fixation, and antibacterial activity. Even though all these applications are realized via the
[250] Environmental Applications of Photocatalysis | SpringerLink — The technological and economic importance of photocatalysis has increased considerably in this century. ... Environmental Applications of Photocatalysis. In: Coronado, J., Fresno, F., Hernández-Alonso, M., Portela, R. (eds) Design of Advanced Photocatalytic Materials for Energy and Environmental Applications. Green Energy and Technology.
[251] Photocatalysis for Energy and Environmental Applications — Photocatalysis for Energy and Environmental Applications: Current Trends and Future Perspectives | SpringerLink Photocatalysis for Energy and Environmental Applications This book presents the existing photocatalytic reactor design and the future developments and the progress needed for both solar light-driven hydrogen generation and environmental purification. In addition, the importance of bismuth-based nanophotocatalysts towards energy and environmental applications and their future development as alternative photocatalysts for the prevailing nanomaterials are presented. Overall the book highlights contemporary developments in the last decade, the future perspectives of photocatalysis and its application towards energy and environment. Renewable and Commercially Viable Porous Material-Supported Heterojunction Nanocomposites as UV-Visible Light-Responsive Photocatalysts for Environmental and Energy-Related Applications Book Title: Photocatalysis for Energy and Environmental Applications
[252] Editorial: Photocatalysis for Environmental Applications - PMC — The rapid development in photocatalysis for environment has inspired this interesting Research Topic. We have invited scientists worldwide to contribute original research and review articles which could enhance our understanding of the key problems in environmental applications of nanostructured photocatalysts.
[253] Recent advances in photocatalysis for environmental applications — This review also discusses the use of TiO2 photocatalysis for water and waste treatment, treating contaminants of emerging concern (CECs), pesticides, endocrine disrupters (EDs) and bacteria using both UV and visible light irradiations. There a number of ways to improve the rate of photocatalytic activity and producing a TiO2 photocatalyst that utilises both UV and visible light. Photocatalysis with solar energy: sunlight-responsive photocatalyst based on TiO 2 loaded on a natural material for wastewater treatment Nitrogen and copper doped solar light active TiO 2 photocatalysts for water decontamination To overcome the environmental pollution, doped and heterojunction based semiconductor metal sulfide nanostructures (MSNSs) are developed as photocatalysts for the purpose of photocatalytic degradation or removal of large organic dyes in an eco-friendly and sustainable fashion.
[254] Principles of Photocatalysts and Their Different Applications: A Review — Even if there has been a lot of progress, the following problems still need to be solved in the future: (1) there is a chance to create new photocatalytic materials with increased effectiveness, selectivity, and reusability by the synthesis of novel materials or modification of existing materials; (2) one novel method for enhancing the photocatalytic performance of semiconductors in a variety of applications is to optimize the semiconductor structure for the creation of flexible and more stable photocatalysts with self-cleaning and flame-resistance qualities; (3) from the economical point of view, it is promising to create photocatalytic systems that are active in the presence of natural sunlight, to significantly increase the photocatalyst lifespan; (4) enhancing photocatalytic reactions by using different types of external field, such as magnetic, electric, and piezoelectric fields, might result in the creation of more effective photocatalysts by improving light absorption, charge separation, and surface reactions; (5) to create more efficient photocatalytic systems for the generation of clean energy and environmental remediation, enhanced characterization investigations might also be carried out to get a better knowledge of the kinetics and processes of the photocatalytic reactions.
[255] Progress in Development of Photocatalytic Processes for Synthesis of ... — Regarding actual industrial processes, for example, pharmaceuaticals, sunlight photocatalysis would be the most beneficial for high demand bestselling drugs, as it would allow for significant cost reduction for irradiation. However, this still requires very high efficiency and low capital costs of the photochemical or photoredox process.
[256] Photocatalysts for a sustainable future: Innovations in large-scale ... — Pilot applications of photocatalytic reactors for large-scale water and air purification and solar hydrogen production. The purpose of this article is to provide a detailed description of the primary challenges and potential solutions encountered in scaling up photocatalytic systems for use in large-scale water and air purification and solar hydrogen production. Although photocatalysis is a promising technology that could partially solve the environmental and energy problems associated with excessive use of fossil fuels, the production and application of photocatalysts capable of operating in visible light on a large scale remains an unsolved problem (J. To achieve the full efficiency of the photocatalytic process, the main problems hindering large-scale photocatalytic applications for environmental cleaning and solar hydrogen generation must be solved.
[257] Promises and Challenges in Photocatalysis - Frontiers — The grand challenge of photocatalysis today is to further expand the practical application of photocatalytic technology in the industrial field, which requires future research to pay attention to the following aspects: As for other photocatalysis research fields, such as solar water splitting (Mi et al., 2021), photocatalytic CO2 reduction (He et al., 2019), photocatalytic CH4 activation (Ma et al., 2021), nitrogen fixation (Chen et al., 2020), and photocatalytic fine chemicals synthesis (Leng et al., 2020; Tan et al., 2021), they often stuck at the proof-of-concept level. Lu, K.-Q., Li, Y.-H., Zhang, F., Qi, M.-Y., Chen, X., Tang, Z.-R., et al. Tan, Y.-X., Chai, Z.-M., Wang, B.-H., Tian, S., Deng, X.-X., Bai, Z.-J., et al.
[258] Complex Challenges in the Textile Industry and Potential Solutions in ... — Although promising, these developments often face challenges in terms of cost-effectiveness and scalability in industrial applications. Dual Z-scheme photocatalytic systems are notable. By combining TiO 2, Ag, and ZnO nanoparticles, this system improved the dye degradation efficiency by 93%.
[259] Recent avenues in the photocatalytic splitting of water for eco ... — Technological advancements Technological developments in materials science, nanotechnology, and energy conversion are driven by research and development in photocatalysis for the creation of H 2 . This advances the development of sustainable technology and renewable energy in general.
[260] Recent advances in the development of photocatalysis and future ... — In this chapter, we review recent advancements in visible light-driven photocatalysis. First, we provide a brief introduction to photocatalysis with a focus on using titanium oxide (TiO 2), which, when coupled with a photocatalyst increases its efficiency. Then we present some challenges and perspectives of photocatalysis.
[261] Evolution of photocatalytic technology and application to environmental ... — Over the years, advances in this field have led to intriguing applications and solutions for environmental preservation. The Mechanism Behind Photocatalysis. Understanding the mechanism of photocatalysis is crucial to appreciating its potential. A photocatalytic reaction begins when a light source, such as sunlight, energizes a catalyst.