文献类型：期刊文献

中文题名：SiO_2添加量对TiO_2薄膜表面特征及亲水性的影响

英文题名：Effect of SiO_2 addition on surface structural and super-hydrophilic property of TiO_2 films

作者：尹衍升[1];关凯书[2];赵虹[3]

机构：[1]山东大学材料液态结构及其遗传性教育部重点实验室山东省工程陶瓷重点实验室,济南250061;[2]华东理工大学化工机械研究所,上海200237;[3]黑龙江农垦科学院工程所,佳木斯154007

年份：2003

卷号：13

期号：2

起止页码：437

中文期刊名：中国有色金属学报

外文期刊名：The Chinese Journal of Nonferrous Metals

收录：CSTPCD;;Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

基金：山东省重点自然科学基金资助项目(Z99F02)

语种：中文

中文关键词：溶胶—凝胶法;Ti02/SiOz薄膜;超亲水性;制备;微结构

外文关键词：sol-gel; TiO_2/SiO_2 composite films; super-hydrophilic property

摘要：采用溶胶凝胶法在载玻片表面制备了均匀透明的TiO2/SiO2超亲水性薄膜。利用XRD、红外光谱(IR)和分光光度计,研究了SiO2添加量对薄膜微结构、透光率、亲水性的影响。结果表明:添加SiO2后,薄膜中TiO2晶粒尺寸变小;在薄膜中,TiO2和SiO2分别单独形成颗粒,但有部分Ti—O—Si键形成,存在部分复合氧化物;由于取代反应,复合氧化物中表面形成Lewis酸,薄膜表面吸附的羟基含量增多且稳定,可提高TiO2薄膜的超亲水特性,其超亲水性状态在暗处可保持很长时间;SiO2添加量为40%时的薄膜亲水性最好。
The relationship between the effect and the amount of SiO2 addition on photogenerated hydrophilicity of TiO2 thin film was investigated by Xray diffraction, UVVIS spectrum and FTIR. It is found that the addition of 40% SiO2 in mole fraction to TiO2 is the most effective for contact angle of water. The SiO2 addition has a suppressive effect on the crystal growth of TiO2 in calcination, and the absorption edge TiO2SiO2 film shows a pseudo'blue shift' owing to quantum size effects. SiO2 and TiO2 form single oxide particle in the film, but a part of complex oxide may be formed also. The Ti—O—Si bond in TiO2/SiO2 film increases the acidity and forms Lewis acid which results the increasing of the hydroxyl content in the composite films. The hydrophilicity and the capability of holding absorbed water of TiO2/SiO2 film are increased during UV irradiation, and the superhydrophilic state can be maintained for a long time in dark place.