Sn^(4+)-TiO_2的制备及其光催化降解邻硝基苯酚的研究  

PREPARATION OF Sn^(4+)-TiO_2 AND RESEARCH OF PHOTOCATALYTIC DEGRADATION OF O-NITRAPHENOL

作　　者：张继征[1] 张俊卿[2] 冯德荣[3] 

机构地区：[1]集宁师专化学系,内蒙古集宁012000 [2]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [3]包头明天科技股份有限公司,内蒙古包头014010

出　　处：《内蒙古石油化工》2007年第1期9-11,共3页Inner Mongolia Petrochemical Industry

基　　金：内蒙古自然科学基金(200308020216)资助项目

摘　　要：采用硬脂酸法制备出Sn4+-TiO2复合光催化剂,用X光衍射仪对粉体进行了必要的表征。样品经500℃焙烧2h后,5%(摩尔分数)Sn4+-TiO2纳米粉末的平均粒径约为14nm。通过粉体对邻硝基苯酚的降解情况对其光催化活性进行了测试,结果表明与纯TiO2相比,Sn4+-TiO2的光催化活性有较大提高,当SnO2的掺入量为摩尔比5.0%时催化活性最高。以高压汞灯为光源,邻硝基苯酚的初始浓度为50mg·L-1、催化剂5%(摩尔分数)Sn4+-TiO2投加量为1.0g·L-1时,邻硝基苯酚的光催化降解效果最好。Sn^4＋-TiO2 composite photocatalysts have been prepared by stearic acid method. The struc- ture and size were analyzed by XRD. After calcination at 500℃ for 2h, 5% （in mole per cent）Sn^4＋-TiO2 powders show that the average particle diameter is about 14 nm. The photocatalytic oxidation properties were examined by the degradation of o-nitrophenol. The results indicate that the photocatalytic activity of the composite partiCles is higher than that of pure ultrafine TiO2,and the optimum loading of SnO2 is 5. 0% （in mole per cent）. Under illumination by high--pressure Hg lamp,the results show that when initial concentration of o-nitrophenol solution is 50mg · L^-1 a mount of catalyst is 1.0g · L^-1,the photocatalytic activity reach the maximum.

关 键 词：二氧化铁 二氧化锡 邻硝基苯酚 光催化 

分 类 号：TQ153.13[化学工程—电化学工业]