title: Photoelectrochemical Properties of CuS-GeO2-TiO2 Composite Coating Electrode.
abstract: The ITO (indium tin oxide) conductive glass-matrix CuS-GeO2-TiO2 composite coating was generated via EPD (electrophoretic deposition) and followed by a sintering treatment at 450°C for 40 minutes. Characterizations of the CuS-GeO2-TiO2 composite coating were taken by SEM (scanning electron microscope), XRD (X-ray diffraction), EDX (energy dispersive X-ray), UV-Vis DRS (ultraviolet-visible diffuse reflection spectrum), and FT-IR (Fourier transform infrared spectroscopy). Results showed that CuS and GeO2 had dispersed in this CuS-GeO2-TiO2 composite coating (mass percentages for CuS and GeO2 were 1.23% and 2.79%, respectively). The electrochemical studies (cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and Tafel polarization) of this CuS-GeO2-TiO2 composite coating electrode were performed in pH = 9.51 Na2CO3-NaHCO3 buffer solution containing 0.50 mol/L CH3OH under the conditions of visible light, ultraviolet light (λ = 365 nm), and dark (without light irradiation as control), respectively. Electrochemical studies indicated that this CuS-GeO2-TiO2 composite coating electrode had better photoelectrocatalytic activity than the pure TiO2 electrode in the electrocatalysis of methanol under visible light.
authors.affiliation: School of Tourism and Geographical Sciences, Yunnan Normal University, Kunming, 650500, China.|College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, 350117, China.
authors.forename: Xinyu
authors.initials: X
authors.lastname: Wen
authors.affiliation: School of Tourism and Geographical Sciences, Yunnan Normal University, Kunming, 650500, China.
authors.forename: Huawei
authors.initials: H
authors.lastname: Zhang
mesh_terms: D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D055664:Electrochemical Techniques; D004566:Electrodes; D005857:Germanium / Q000737:chemistry*; D000432:Methanol / Q000737:chemistry; D055668:Photochemical Processes; D013440:Sulfides / Q000737:chemistry*; D017971:Tin Compounds / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D013440:Sulfides; D017971:Tin Compounds; D005857:Germanium; C009495:titanium dioxide; C040516:germanium oxide; C109984:indium tin oxide; D003300:Copper; D014025:Titanium; D000432:Methanol