Photoelectrochemical Properties of CuS-GeO2-TiO2 Composite Coating Electrode

PLoS One

Huawei Zhang¹  Xinyu Wen² 

[1] College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, 350117, China;School of Tourism and Geographical Sciences, Yunnan Normal University, Kunming, 650500, China

关键词: Coatings;    Visible light;    Electrode potentials;    Electrochemistry;    Electric conductivity;    Glass;    Reference electrodes;    Semiconductors;   

DOI  :  10.1371/journal.pone.0152862

学科分类：医学（综合）

来源: Public Library of Science

【 摘 要 】

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.

【 授权许可】

CC BY