Investigation of superhydrophilic mechanism of titania nano layer thin film-Silica and indium oxide dopant effect

被引：27

作者：

Eshaghi, Akbar ^{[1
]}

Eshaghi, Ameneh ^{[2
]}

机构：

[1] Maleke Ashtar Univ Technol, Fac Mat Sci & Engn, Esfahan, Shahinshahr, Iran

[2] Islamic Azad Univ, Sari Branch, Sari, Iran

来源：

BULLETIN OF MATERIALS SCIENCE | 2012年 / 35卷 / 02期

关键词：

TiO2; sol-gel method; surface acidity; superhydrophilicity; PHOTOCATALYTIC ACTIVITY; SUPER-HYDROPHILICITY; TIO2/SIO2; PROPERTY; DIOXIDE;

D O I：

10.1007/s12034-012-0277-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, TiO2-SiO2-In2O3 nano layer thin films were deposited on glass substrate using sol-gel dip coating method. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and water contact angle measurements were used to evaluate chemical structure, surface composition, hydroxyl group contents and superhydrophilicity of titania films. FTIR result indicated that Si-O-Si, Si-O-Ti and Ti-O-Ti bands formed in TiO2-SiO2-In2O3 sample. According to XPS, the hydroxyl content for TiO2, TiO2-SiO2 and TiO2-SiO2-In2O3 films was calculated as 11 center dot 6, 17 center dot 1 and 20 center dot 7%, respectively. The water contact angle measurements indicated that silica and indium oxide dopant improved the superhydrophilicity of titania nano film surface especially in a dark place. The enhanced superhydrophilicity can be related to the generation of surface acidity on the titania nano film surfaces. In the present state, superhydrophilicity is induced by the simultaneous presence of both Lewis and Bronsted sites.

引用

页码：137 / 142

页数：6

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