硅酸盐学报2011，Vol.39Issue(2)：204-209,6.
Si掺杂TiO2光催化材料的制备、活性及其机理
Preparation, Photocatalytic Activity and Mechanism of Si-Doped Titania Material
摘要
Abstract
The Si-doped TiO2 (Si:TiO2) powder was prepared by a two-step sol-gel method and its phase composition and surface structure were characterizexl through X-ray diffraction, thermogravimetry-differential thermal analysis and X-my photoelectron spectroscopy. The photocatalytic activity of Si:TiO2 powder was investigated using methyl orange as target compound. The results indicate that the Si:TiO2 powder has higher photocatalytic activity than pure TiO2 powder for the degradation of organic matter in water.The Si:TiO2 powder is anatase structure. The introduction of Si into TiO2 not only hinders the increase of particle size and phase transformation, but also leads to generate the Ti3+ near the catalyst surface during the thermal diffusion process of atoms Si and Ti.The combination of Ti3+on near surface with oxygen vacancy defects and the co-existence of Ti4+ on the catalyst surface and Ti3+which play the role of the charge separation on the formation of the charge separation electric field are the real reason for improvement of photocatalytic activity of the Si:TiO2.关键词
硅掺杂二氧化钛/甲基橙/表面结构/光催化机理Key words
silicon-doped titania/ methyl orange/ surface structure/ photocatalytic mechanism分类
化学化工引用本文复制引用
王韵芳,孙彦平..Si掺杂TiO2光催化材料的制备、活性及其机理[J].硅酸盐学报,2011,39(2):204-209,6.基金项目
国家自然科学基金(20776091)资助项目. （20776091）
