Background irradiated photocatalysis of TiO2 thin films

In terms of the UV irradiating directions, photocatalysis with TiO2 thin films can be divided into two types, the background irradiated photocatalysis and the foreground irradiated one. Comparatively, background irradiated photocatalysis has an advantage of avoiding the UV light attenuation which fo...

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Bibliographic Details
Published inHuanjing kexue Vol. 26; no. 3; p. 135
Main Authors Cen, Ji-wen, Li, Xin-jun, Liang, Yuan-yuan, He, Ming-xing, Zheng, Shao-jian, Feng, Man-zhi
Format Journal Article
LanguageChinese
Published China 01.05.2005
Subjects
Background Radiation
Catalysis
Environmental Pollution - prevention & control
Photochemistry - methods
Titanium - chemistry
Ultraviolet Rays
Water Purification - methods
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Summary:In terms of the UV irradiating directions, photocatalysis with TiO2 thin films can be divided into two types, the background irradiated photocatalysis and the foreground irradiated one. Comparatively, background irradiated photocatalysis has an advantage of avoiding the UV light attenuation which foreground irradiated one suffers when the light is going through the solution. In this article, the influence of the thickness of the films, the wavelength of light source and non-uninformly doping with V on the photocatalytic efficiency of the catalyst in case of background irradiated photocatalysis is investigated, and simultaneously it is compared with foreground irradiated one. The results show that in case of background irradiated photocatalysis there is an optimal thickness of the film according to the wavelength of the light source that is limited in the range of 300 nm to 388 nm, which is quite different from foreground irradiated one. But in both cases, the catalyst's photocatalytic activities are improved
ISSN:0250-3301