The effect of background irradiation on photocatalytic efficiencies of TiO2 thin films

被引：17

作者：

Cen, HW

Li, XJ ^{[1
]}

He, MX

Zheng, SJ

Feng, MZ

机构：

[1] Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

CHEMOSPHERE | 2006年 / 62卷 / 05期

关键词：

photocatalysis; background irradiated photocatalysis; TiO2; film;

D O I：

10.1016/j.chemosphere.2005.05.008

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

TiO2 thin films were prepared on quartz pipe substrates. Effects of the thickness of the films, the wavelength of the UV light and La doping on efficiencies of background irradiated photocatalysis were investigated, and simultaneously was compared with those of foreground irradiated photocatalysis. The results showed that there was an optimal thickness of the film corresponding with each wavelength of the light source limited in the range from 300 nm to 388 nm in the case of background irradiated photocatalysis, which was quite different from that of foreground irradiated one. But in both cases, the film's photocatalytic activities were enhanced by La non-uniformly doping. The results are useful for the design of high-efficiency photocatalytic reactors. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：810 / 816

页数：7

共 14 条

[1] Evaluating the activities of immobilized TiO2 powder films for the photocatalytic degradation of organic contaminants in water [J].