文献类型：期刊文献

中文题名：TiO_2-SiO_2复合薄膜光催化活性与亲水性关系的研究

英文题名：RELATIONSHIP BETWEEN PHOTOCATALYTIC ACTIVITIES AND SUPER-HYDROPHILICITY OF TiO_2-SiO_2 COMPOSITE FILMS

作者：关凯书[1];尹衍升[2,3];姜秋鹏[4]

机构：[1]华东理工大学化工机械研究所;[2]山东大学,材料液态结构及遗传性教育部重点实验室;[3]山东大学,工程陶瓷省重点实验室,济南250061;[4]山东莱阳农学院工程系

年份：2003

卷号：31

期号：3

起止页码：219

中文期刊名：硅酸盐学报

外文期刊名：Journal of The Chinese Ceramic Society

收录：CSTPCD;;EI(收录号：2003387642771);Scopus;北大核心:【北大核心2000】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：氧化钛-氧化硅复合薄膜;溶胶-凝胶;超亲水性;光催化;自清洁效应

外文关键词：Acidity;Films;Glass;Hydrophilicity;Irradiation;Photocatalysis;Sol;gels;Transparency

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XPS ,XRD ,IR等对光催化活性和亲水性关系进行了研究。结果表明 :薄膜的亲水性与光催化活性协同作用是其保持自清洁的关键。添加SiO2 后 ,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。在与有机物竞争吸附过程中 ,水优先吸附 ,可提高薄膜的超亲水性和光催化活性 。
The TiO2-SiO2 film on the surface of glass plate with uniform transparency and super-hydrophilicity was prepared by the sol-gel method. The relationship between the photocatalytic activity and the super-hydrophilicity for the composite film was investigated by measuring the XPS, X-ray diffraction, UV-Vis spectrum and FTIR. The results show that the synergetic effect of hydrophilicity and photocatalysis can improve and maintain the self-cleaning effect. The SiO2 addition increases the acidity and form the Lewis acidity, which results in the increase of the hydroxyl content and the improvement of the stability of the hydroxyl in the composite film. The consequence is that the hydrophilicity and the photocatalytic activity can be increased during the UV irradiation and the self-cleaning effect can be enhanced.