硅酸盐学报2001，Vol.29Issue(1)：39-43,5.
光催化超亲水性TiO2-SiO2薄膜的研究
STUDY ON PHOTOCATALYTIC AND SUPER_HYDROPHILIC THIN FILMS OF TiO2-SiO2
摘要
Abstract
TiO2-SiO2 thin films were prepared on slide glass substrates by sol-gel method. The influences of the amount of SiO2 addition and the coating cycle times of TiO2-SiO2 thin films on the microstructure, transmittance, contact angle of water and photocatalytic activity of TiO2-SiO2 thin films were investigated by using heating microscope, SEM and spectrophotometer. The results indicate that the contact angle of water is reduced as a result of adding SiO2 to TiO2 thin film. The super_hydrophilic state can be maintained for a long time. The addition of SiO2 less than 30% (in mole) has a suppressive effect on the crystal growth of anatase in calcination, and meanwhile, the transmittance is improved and the photocatalytic activity of TiO2 decreases slightly. With 10% (in mole) SiO2 addition and repeating the cycle 3 times, the contact angle of TiO2-SiO2 thin films is about 0° and the photocatalytic activity measurement shows that 53% methyl orange is degraded after irradiation for 2 h. The properties of the films are the best. Additionally, SiO2 and TiO2 form single oxide particles in the film, but a minor part of complex oxide may be formed due to the existance of Ti—O—Si vibration in the IR spectrum.关键词
溶胶-凝胶/氧化钛-氧化硅/薄膜/光催化/超亲水性分类
化学化工引用本文复制引用
陈文梅,杨尊先,赵修建,余家国..光催化超亲水性TiO2-SiO2薄膜的研究[J].硅酸盐学报,2001,29(1):39-43,5.基金项目
教育部科学技术研究重点资助项目(99087). （99087）
