无机材料学报2012，Vol.27Issue(10)：1079-1083,5.DOI:10.3724/SP.J.1077.2012.11781
热处理温度对TiO2/SiO2复合气凝胶光催化性能的影响
Effects of Heat Treatment Temperature on Photocatalytic Activity of TiO2/SiO2 Composite Aerogels
刘朝辉 1侯根良 1苏勋家 1郭锋 1肖舟 1贾海鹏1
作者信息
摘要
Abstract
TiO2/SiO2 composite aerogels were prepared by Sol-Gel method at ambient pressure and heat-treated at different temperatures. The micro structure of TiO2/SiO2 composite aerogels was characterized by X-ray diffraction (XRD), thermo gravimetric analyzer (TGA) and N2 adsorption-desorption. The photocatalytic activity was evaluated by means of photocatalytic degradation of methyl orange under UV irradiation. The effects of heat treatment temperatures on microstructure and photocatalytic activity were investigated. With the increase of heat treatment temperature, the crystallization of anatase and the anatase grain size increase, however, the specific surface area decreases. As a result, the photocatalytic activity of TiO2/SiO2 composite aerogels is enhanced initially, then decreases with the increase of heat treatment temperature. When the heat treatment temperature is set at about 700℃, the degradation ratio of methyl orange on the TiO2/SiO2 composite aerogels reaches 95.4% after irradiated by ultraviolet light for 20 min.关键词
TiO2/SiO2复合气凝胶/热处理温度/微观结构/光催化性能Key words
TiO2/SiO2 composite aerogels/ heat treatment temperature/ microstructure/ photocatalytic activity分类
通用工业技术引用本文复制引用
刘朝辉,侯根良,苏勋家,郭锋,肖舟,贾海鹏..热处理温度对TiO2/SiO2复合气凝胶光催化性能的影响[J].无机材料学报,2012,27(10):1079-1083,5.
