Macromolecular Symposia · 2019 · 29 citations · 28 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsCeramicsCrystal StructureCrystal ChemistryInorganic MaterialsOptical CeramicsOptical Properties Of SolidsRaman SpectroscopyX-ray DiffractionBand GapCrystal Lattice SymmetryMicrostructureOptical PropertiesRietveld AnalysisRietveld RefinementTriclinic Unit CellsVibrational Modes
Abstract Copper tungstate CuWO 4 ceramic is prepared by solid‐state reaction route at 850 °C for 3 h. The X‐ray diffraction (XRD) study proves that the synthesized composition possesses a monophasic triclinic structure with space group . The structural analysis (crystal symmetry and unit cell parameters) is investigated systematically using Rietveld refinement of the XRD patterns. Scanning electron microscope analysis of the sintered ceramics reveals the formation of dense microstructure with non‐uniform grains. The 16 active vibrational modes are observed in Raman spectra from 100 to 1000 cm −1 . UV–vis absorption spectra revealed a direct allowed transition with band gap E g = 2.23 eV. The photoluminescence (PL) emission spectra show intense yellow emission at room temperature. These results suggest the applications of CuWO 4 as photocatalysts, photoanodes, and phosphors.
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