掺杂铁的纳米二氧化钛光催化降解邻硝基苯酚的研究  

Study on the photocatalysis efficiency of degradation of o-nitraphenol by an iron-doped nanometer TiO_2

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》2006年第10期12-14,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：以钛酸丁酯为原料,用溶胶-凝胶(So l-gel)法制备了掺杂铁的纳米T iO2粉末。采用X光衍射仪对粉体的物相进行了表征。样品经500℃焙烧2h后,0.02%(摩尔分数)Fe3+-T iO2纳米粉末为单一的锐钛型结构。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T iO2相比,Fe3+-T iO2的光催化活性有较大提高,当Fe3+的掺入量为摩尔比0.02%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50m g.L-1、催化剂0.02%(摩尔分数)-T iO2投加量为1.0g.-L 1时,邻硝基苯酚的光催化降解效果最好。Nanometer iron doped TiO2 powder was obtained from tetrabutyl titanate by Sol- gel method. The phase and size were analyzed by XRD. After calcination at 500℃ for 2h, 0. 02% （in mole per cent）Fe^3＋-TiO2 powders show that the nanocrystalline TiO2with anatase phase. The photocata.lytic oxidation properties were examined by the degradation of o-nitraphenol. The results indicate that the photocatalytic activity of the composite particles is higher than that of pure ultrafine TiO2,and the optimum loading of Fe is 0.02%（in mole per cent）. Under illumination by high pressure mercury lamp,the results show that when initial concentration of o-nitraphenol solution is 50 mg · L^-1 ,a mount of catalyst is 1.0 g·L^-1,the photocatalytic activity reach the maximum.

关 键 词：溶胶-凝胶法 纳米二氧化钛 掺杂 邻硝基苯酚 光催化氧化 

分 类 号：TQ134.11[化学工程—无机化工]