2D spinodal phase-separated TiO2 films prepared by sol-gel process and photocatalytic activity

被引：12
|
作者：
Mori, R [1 ]
Takahashi, M [1 ]
Yoko, T [1 ]
机构：
[1] Kyoto Univ, Inst Chem Res, Uji, Kyoto 6110011, Japan
来源：
MATERIALS RESEARCH BULLETIN | 2004年 / 39卷 / 13期
关键词：
oxides; thin films; sol-gel chemistry; catalytic properties;
D O I：
10.1016/j.materresbull.2004.05.021
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
For the purpose of obtaining oxide thin films with high photocatalytic activity, we have successfully prepared the TiO2 anatase polycrystalline films with a two-dimensional spinodal phase-separated structure (2D-SPSS) in micron size by the sol-gel dip-coating method from a titanium tetraisopropoxide solution containing polyoxyethylene(20) nonylphenyl ether. It has been also found that TiO2 films with a variety of morphologies in addition to the 2D-SPSS can be formed by controlling the molar ratio of water to titanium tetraisopropoxide. The methylene blue photodegradation activity of the 2D-SPSS TiO2 film was higher than that of dense TiO2 film prepared from a TiO2 sol without co-existing polymer. This fact can be interpreted in terms of possessing a high specific surface area available for the photocatalytic reaction. (C) 2004 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2137 / 2143
页数：7
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