文献类型：期刊文献

英文题名：Enhanced effect and mechanism of SiO2 addition in super-hydrophilic property of TiO2 films

作者：Guan, Kaishu[1]; Lu, Baojun[3]; Yin, Yansheng[2]

机构：[1]E China Univ Sci & Technol, Res Inst Chem Equipment, Shanghai 200237, Peoples R China;[2]Shandong Univ, Key Lab Liquid Struct & Hered, Minist Educ, Jinan 250061, Peoples R China;[3]Laiyang Agr Coll, Shandong 265200, Peoples R China

年份：2003

卷号：173

期号：2-3

起止页码：219

外文期刊名：SURFACE & COATINGS TECHNOLOGY

收录：;EI(收录号：2003307554706);WOS:【SCI-EXPANDED(收录号:WOS:000184673800013)】；

语种：英文

外文关键词：super-hydrophilic property; TiO2/SiO2 composite films; sol-gel

摘要：Relationship between the effect and the amount of SiO2 addition on the photo-generated hydrophilicity of TiO2 films is investigated. X-ray diffraction, UV-Vis spectrum and Fourier transform infrared spectroscopy are used to determine film behavior and the hydrophilicity is assessed by contact angle measurement. It is found that addition of 40 mol% SiO2 to TiO2 is most effective for reducing the contact angle of water. The contact angle of water can maintain low for a long time in dark place. SiO2 addition has a suppressive effect on the crystal growth of TiO2 in calcination and enhances the transmittance of the composite films. SiO2 and TiO2 form single oxide particles in the films, but a part of complex oxide may be formed. Ti-O-Si bonds increase the acidity which induces the increasing of the hydroxyl content in the composite films. (C) 2003 Elsevier Science B.V. All rights reserved.