文献类型：期刊文献

英文题名：Photocatalytic activity and hydrophilicity of SiO2-TiO2 thin films

作者：Wang, JiaoJiao[1];Ou, Haipeng[1];Gu, Donglin[1];Ruessel, Christian[2];Liang, Wen[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Res Inst Biomat, Shanghai 200237, Peoples R China;[2]Univ Jena, Otto Schott Inst, Jena, Germany

年份：2013

卷号：54

期号：4

起止页码：169

外文期刊名：PHYSICS AND CHEMISTRY OF GLASSES-EUROPEAN JOURNAL OF GLASS SCIENCE AND TECHNOLOGY PART B

收录：;EI(收录号：20134416906351);WOS:【SCI-EXPANDED(收录号:WOS:000324456400004)】；

基金：This work was financially supported by the National Nature Science Foundation of China (Project for Young Scientists Fund No. 50902048) and Program for Changjiang Scholars and Innovative Research Team in University (IRT0825).

语种：英文

外文关键词：Differential scanning calorimetry - Irradiation - Photocatalysis - Thermogravimetric analysis - Sol-gels - Organic solvents - Scanning electron microscopy - Crystal atomic structure - Hydrophilicity - Atomic force microscopy - Sol-gel process - Thin films - Titanium dioxide - X ray diffraction

摘要：SiO2-TiO2 thin films with various SiO2 contents have been prepared from titanium butoxide solution and anhydrous ethanol as a solvent by a sol-gel dip coating technique. The thermal properties of the SiO2-TiO2 (5 mol% SiO2) gels were analyzed by thermogravimetry and differential scanning calorimetry (TG-DSC). Structural properties of the SiO2-TiO2 thin films at different heat treatment temperatures were analyzed by x-ray diffraction (XRD), Raman spectroscopy (RS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The results show that with increasing SiO2 content from 5 to 30 mol%, TiO2 crystals become smaller because the contact between TiO(2)particles is prevented by SiO2. The photocatalytic performance of the SiO2-TiO2 films was examined by considering the degradation of Rhodamine B. The hydrophilicity of the SiO2-TiO2 films was also investigated by measuring the surface contact angle between the SiO2-TiO2 films and water under different conditions. The results showed that by adding less than 30 mol% SiO2, the photocatalytic activity of the SiO2-TiO2 films increased during UV irradiation due to suppression of anatase crystal growth during calcination. The hydrophilicity can also be improved and the super-hydrophilic state can be maintained for a long time.