Preparation, characterization and photo-catalytic behavior of WO3-TiO2 catalysts with ozygen vacancies
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 Fe3+ as an electron acceptor under UV irradiation in 12 h,the maximum rate for O2 evolution is 667 μmol/(L·h).
TiO2 ozygen vacancies photocatalyst calcination
TONG Hai-xia CHEN Qi-yuan YIN Zhou-lan HU Hui-ping WU Dao-xin YANG Ya-hui
Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation,Chemic School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China
国际会议
2009 Frontier Symposium of China Postductors on Materrials Science(2009年中国博士后材料科学前言论坛)
长沙
英文
1483-1488
2009-11-22（万方平台首次上网日期，不代表论文的发表时间）