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One-Step Hydrothermal Synthesis of Precious Metal-Doped Titanium Dioxide–Graphene Oxide Composites for Photocatalytic Conversion of CO<sub>2</sub> to Ethanol

DOIFull Paper Access

64

Citations

53

References

2021

Year

Napat Lertthanaphol, Natpichan Pienutsa, Kittapas Chusri, Thirawit Sornsuchat, Prowpatchara Chanthara, Panpailin Seeharaj, Pattaraporn Kim‐Lohsoontorn, Sira Srinives
ACS Omega

Abstract

We utilized a one-step hydrothermal process for the synthesis of precious metal-doped titanium dioxide (TiO<sub>2</sub>)/graphene oxide (GO) composites. The metal-doped TiO<sub>2</sub>/GO composites, including silver-TiO<sub>2</sub>/GO (Ag-TiO<sub>2</sub>/GO), palladium-TiO<sub>2</sub>/GO (Pd-TiO<sub>2</sub>/GO), and copper-TiO<sub>2</sub>/GO (Cu-TiO<sub>2</sub>/GO), were synthesized by mixing a metal precursor, titanium butoxide, and graphene oxide in a water-ethanol mixture in an autoclave hydrothermal reactor. The photocatalytic performance of the composites was tested in the photoreduction of carbon dioxide (CO<sub>2</sub>) to ethanol. Ag-TiO<sub>2</sub>/GO, Pd-TiO<sub>2</sub>/GO, and Cu-TiO<sub>2</sub>/GO exhibited an ethanol production rate of 109, 125, and 233 μmol/g<sub>cat</sub> h, respectively. The outstanding performances of Cu-TiO<sub>2</sub>/GO can be attributed to a combined effect of key parameters, including optical band gap, crystallite size, and BET surface area.

References

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