摘要
TiO2 photocatalysts compounded with WO3 were prepared via a modified hydrolysis process and the 2%WO3-TiO2 catalysts with different oxygen vacancies were obtained by calcination at 873 K in H2 atmosphere.The catalysts were identified using X-ray diffractometry(XRD),specific surface measurement(BET),electron paramagnetic resonance spectroscopy(EPR), UV-Vis diffusion refraction spectroscopy(DRS),and X-ray photoelectron spectroscopy(XPS).The photocatalytic activity of 2% WO3-TiO2 with different oxygen vacancies was investigated employing splitting of water for O2 evolution.The results indicate that appropriate oxygen vacancies can obviously improve the photocatalytic activity of 2%WO3-TiO2 catalysts,and using Fe 3+ as an electron acceptor under UV irradiation in 12 h,the maximum rate for O2 evolution is 667μmol/(L·h).
TiO2 photocatalysts compounded with WO3 were prepared via a modified hydrolysis process and the 2% WO3-WiO2 catalysts with different oxygen vacancies were obtained by calcination at 873 K in H2 atmosphere. The catalysts were identified using X-ray diffractometry （XRD）, specific surface measurement （BET）, electron paramagnetic resonance spectroscopy （EPR）, UV-Vis diffusion refraction spectroscopy （DRS）, and X-ray photoelectron spectroscopy （XPS）. The photocatalytic activity of 2% WO3-TiO2 with different oxygen vacancies was investigated employing splitting of water for O2 evolution. The results indicate that appropriate oxygen vacancies can obviously improve the photocatalytic activity of 2% WO3-TiO2 catalysts, and using Fe^3＋ as an electron acceptor under UV irradiation in 12 h, the maximum rate for O2 evolution is 667 μ mol/（L·h）.
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2009年第6期1483-1488,共6页
Transactions of Nonferrous Metals Society of China
基金
Project(08JJ3022)supported by the Natural Science Foundation of Hunan Province,China
Project(K-081025)supported by the Photocatalytic Key Laboratory of Fujian Province,China
