Superhydrophilicity and photocatalytic activity of sol-gel deposited nanosized titania thin films

被引：23
作者：
Kazemi, M. [1 ]
Mohammadizadeh, M. R. [1 ,2 ]
机构：
[1] Univ Tehran, Dept Phys, SRL, Tehran, Iran
[2] Brock Univ, Dept Phys, St Catharines, ON L2S 3A1, Canada
来源：
THIN SOLID FILMS | 2011年 / 519卷 / 19期
关键词：
Sol-gel; TiO2 nano thin films; Aging time; Tween; 80; Photocatalytic; Superhydrophilicity;
D O I：
10.1016/j.tsf.2011.04.216
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanosized TiO2 thin films with anatase structure were synthesized by a sol-gel dip coating method using TiCl4-ethanol solution as a precursor. The resulting solution was aged between 0 up to 24 h and characterized by the X-ray diffraction, atomic force microscopy (AFM), and UV-vis photospectroscopy. The AFM reveals that aging time incites the grain growth of crystal in the TiO2 films. The effect of aging time on morphology, photocatalytic, and superhydrophilic behavior of the films was also studied. It was found that there is an optimum aging time that photocatalytic and superhydrophilic yields reach a maximum, simultaneously. Photocatalytic and photo-wettability mechanisms follow two kinds of behaviors, depending on whether the aging time is less or more than a threshold value of around 1 h. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：6432 / 6437
页数：6
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