Photo-induced super-hydrophilic property and photocatalysis on transparent Ti-containing mesoporous silica thin films

被引：28
作者：
Yamashita, H
Nishio, S
Katayama, I
Nishiyama, N
Fujii, H
机构：
[1] Osaka Univ, Div Mat & Mfg Sci, Grad Sch Engn, Suita, Osaka 5650871, Japan
[2] Osaka Univ, Div Chem Engn, Grad Sch Engn, Toyonaka, Osaka 5608531, Japan
[3] Osaka Univ, Joining & Welding Res Inst, Osaka 5650047, Japan
来源：
CATALYSIS TODAY | 2006年 / 111卷 / 3-4期
关键词：
mesoporous thin film; titanium oxide; super-hydrophilic property;
D O I：
10.1016/j.cattod.2005.10.061
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The transparent Ti-containing mesoporous silica thin films can be prepared on quartz plate using a spin-coating sol-gel method. The spectroscopic characterization has revealed that the Ti-containing mesoporous silica thin films contain isolated and tetrahedrally-coordinated titanium oxide moieties in the frameworks. Compared with the common mesoporous silica thin films, these Ti-containing mesoporous silica thin films have demonstrated a strong hydrophilic surface property even before UV-irradiation. After UV-light irradiation, the contact angle of water droplet on the Ti-containing mesoporous silica thin films became lower, indicating the appearance of the super-hydrophilic property. Under UV-light irradiation Ti-containing mesoporous silica thin films also exhibited highly selective activity for the photocatalytic oxidation of propylene. The isolated and tetrahedrally-coordinated titanium oxide moieties are responsible for these photo-induced surface reactions. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：254 / 258
页数：5
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