纳米TiO_2薄膜的制备与光催化性能研究  

Preparation and Photocatalytic Properties of Nano-TiO_2 Thin Films

作　　者：高如琴[1] 程萌[1] 黄豆豆[1] 张楠[1] 

机构地区：[1]华北水利水电学院环境科学与工程研究所,郑州450011

出　　处：《人工晶体学报》2012年第3期675-679,共5页Journal of Synthetic Crystals

基　　金："十二五"国家科技支撑计划(2011BAB03B07);河南省教育厅自然科学研究计划项目(2011B610005);华北水利水电学院科研启动金(200930)资助项目

摘　　要：以四氯化钛为前驱体,采用水解沉淀法,在不同的水解温度下,在硅藻土基多孔陶瓷上负载纳米TiO2薄膜,结合XRD和TEM对负载的纳米TiO2粒径进行了表征。对比分析了测试方法及水解温度对纳米TiO2粒径的影响。以罗丹明B为目标降解物,考察了水解温度对光催化剂活性的影响。结果表明:样品经550℃煅烧后,TiO2薄膜为锐钛矿型;水解温度为50℃时TiO2粒径小于水解温度为75℃时所负载纳米TiO2粒径;两种方法所测TiO2粒径有一定差异:dXRD>dTEM;水解温度为50℃所负载纳米TiO2薄膜,紫外光照300 min,对罗丹明B的去除率为89.9%,而75℃时,样品在紫外光照330 min,对罗丹明B的去除率为78.6%。Using TiCl4 as the precursor,nano-TiO2 thin films were loaded on diatomite-based porous ceramic by the precipitation method under different hydrolysis temperature.The particle size of composites were characterized by X-ray diffraction（XRD） and transmission electron microscope（TEM）.The effect of measuring methods and hydrolysis temperature on nano-TiO2 particle size was analyzed,and the influence of hydrolysis temperature on photocatalytic activity was investigated by the degradation to rhodamine B.The results indicated that TiO2 films calcined at 550 ℃ are anatase,and TiO2 particle size of hydrolysis temperature 50 ℃ is less than that in 75 ℃.TiO2 particle size at the hydrolysis temperature of 75 ℃ is less than that of 50 ℃,and the TiO2 particle size in two detection methods has certain difference：dXRD〉dTEM;Under an ultraviolet lamp irradiation,the removal rate of composites that TiO2 films was loaded at hydrolysis temperature 50 ℃reaches 86.9% in 300 min,and at hydrolysis temperature 75 ℃ is 78.6% in 330 min.

关 键 词：纳米TIO2薄膜 粒径 水解温度 光催化活性 

分 类 号：O484[理学—固体物理]