Investigation on visible-light activity of WOx/TiO2 photocatalyst

被引：17
|
作者：
Zhang, Q [1 ]
Li, XJ
Li, FB
Chang, J
机构：
[1] Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
[2] Hong Kong Polytech Univ, Dept Civil & Struct Engn, Kowloon, Hong Kong, Peoples R China
来源：
ACTA PHYSICO-CHIMICA SINICA | 2004年 / 20卷 / 05期
关键词：
photocatalysis; activity under visible-light; XPS; Fermi level; titanium dioxide; magnetron sputtering; tungsten oxide;
D O I：
10.3866/PKU.WHXB20040513
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The TiO2 thin films from dip-coating system were magnetron sputtered on with WOx, and can be activated by visible-light in gaseous dimethyl benzene photocatalytic degradation. The mechanism of its visible-light activity was investigated by UV-Vis absorption spectra and X-ray photoemission. UV-Vis absorption spectra showed its visible-light response expanding and having strong absorption with respect to the pure TiO2 film. XPS indicated the formation of W impurity energy level and Ti defect energy level, which was the main reason for the absorption in the visible-light range and the perquisite to have visible-light activity; and made Fermi level upper moved, free carriers more and photocatalytic efficiency enhanced.
引用
收藏
页码：507 / 511
页数：5
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