Photocatalytic degradation of methyl orange over ITO/CdS/ZnO interface composite films

作     者：WEI Shouqiang, SHAO Zhongcai, LU Xudong, LIU Ying, CAO Linlin, HE Yan School of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110168, China. 

作者机构：School of Environmental and Chemical Engineering Shenyang Ligong University Shenyang 110168 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2009年第21卷第7期

页      面：991-996页

核心收录：

学科分类：083001[工学-环境科学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

主　　题：electrodeposition zinc oxide cadmium sulfide composite film photocatalytic activity 

摘      要：ITO/CdS/ZnO interface composite films were successfully prepared by subsequent electrodeposition of CdS and ZnO onto indium tin oxide （ITO） glass substrates. The obtained ITO/CdS/ZnO composite films were characterized with X-ray diffraction （XRD）, scanning electron microscopy （SEM）, and UV-Vis spectroscopy. The photocatalytic activity of ITO/CdS/ZnO composite films were investigated using methyl orange （MO） as a model organic compound under UV light irradiation. The influence of operating parameters on MO degradation including initial concentration of MO, pH value of solution, and inorganic anion species over the composite films were examined. A blue shift of absorption threshold was observed for the ITO/CdS/ZnO film in comparison with ITO/ZnO film. ITO/CdS/ZnO composite films prepared under specific conditions showed a higher photocatalytic activity than that of ITO/ZnO films. It was also found that the photocatalytic degradation of MO on the composite films followed pseudo-first order kinetics.