LI Fenfen1, WANG Zheng2, YANG Cheng2*, ZHANG Wenyu1, WU Jinhu2
(1. School of Chemical Engineering, Shandong Institute of Light Industry, Jinan 250353, China 2. Key Laboratory of Biofuels, Qingdao Institute of Bioenergy and Bio process Tecgnology, Chinese Academy of Sciences, Qingdao 266101, China)
Abstract: Cu was loaded on the S-doped TiO2 by methods of electroless plating, wet impregnation and chemical reduction, respectively. The physical structure and chemical properties of the prepared Cu/S-TiO2 were characterized by UV-Vis, XRD, XPS, EXAFS and FESEM techniques. It was illustrated that copper species loaded by electroless copper plating and wet impregnation method were Cu2O/CuO, while Cu/Cu2O was loaded by chemical reduction method. The Cu/S-TiO2 prepared by electroless plating method showed excellent visible light absorption ability. The photocatalytic activities under visible light was investigated using various filtered wavelengths of light (λ > 420 nm, λ > 500 nm) for a period of 20 h. Moreover, the electroless plated copper on S-TiO2 were highly dispersed, which could facilitate the photo-generated charges capture, transfer and separation. Thus, the catalyst exhibited the highest photocatalytic activity and stability for hydrogen generation in methanol solution under simulated sunlight (Xe lamp), and a possible catalytic effect/reaction mechanism was proposed.
Key words: photocatalyt; Cu/S-TiO2; electroless plating; hydrogen; methanol solution
E-mail: yangcheng@qibebt.ac.cn
Journal of Molecular Catalysis, Vol. 26, Issue 2, 2012, 174-183
