Synthesis and characterization of F-N-W-codoped TiO2 photocatalyst with enhanced visible light response

被引：8
|
作者：
Shi, Xiaoliang [1 ,2 ]
Qin, Haibo [2 ]
Yang, Xingyong [2 ]
Zhang, Qiaoxin [1 ,2 ]
机构：
[1] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China
[2] Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2012年 / 47卷 / 12期
关键词：
Semiconductors; Chemical synthesis; Electron microscopy; Catalytic properties; TUNGSTEN;
D O I：
10.1016/j.materresbull.2012.09.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Anatase F-N-W-codoped TiO2 photocatalyst was successfully prepared by a method combining sol-gel with hydrothermal treatment. Effects of F, N and W ion dosage concentration on the crystallinity, morphology, grain size and chemical status of the photocatalyst were investigated. The results showed that the F-7NW-TiO2 photocatalyst composed of uniform ellipsoidal particles around 20 nm in length and 10 nm in width, and the photocatalyst displayed enhanced visible-light absorption and photocatalytic activities. Using the photocatalyst and under visible irradiation for 1.5 h, the decoloration percent of RB and carbon removal rate were about 98% and 94% respectively, which were much higher than that of commercial P25, TiO2, N-W-TiO2 and F-TiO2. The high visible-light photocatalytic activity of F-7NW-TiO2 might result from narrowing the band gap and lowing charge pairs recombination rate for the WxTi1-xO2, O-Ti-N and valence variation of W ions existing. (C) 2012 Elsevier Ltd. All rights reserved,
引用
收藏
页码：4347 / 4352
页数：6
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