掺杂镨的纳米二氧化钛光催化降解2,4-二硝基苯酚的研究  

Study on the Photocatalysis Degradation of 2,4-DNP by a Praseodymium-Doped Nanometer TiO_2

作　　者：李国祥[1] 张俊卿[2] 冯德荣 郭军平[4] 

机构地区：[1]内蒙古科技大学生物与化学工程学院,内蒙古包头014010 [2]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [3]包头明天科技服份有限公司,内蒙古包头014010 [4]天津和平海湾电源集团有限公司,天津300384

出　　处：《稀土》2007年第2期37-39,共3页Chinese Rare Earths

基　　金：内蒙古自然科学基金资助项目(200308020216)

摘　　要：以钛酸丁酯为原料,用溶胶-凝胶(Sol-gel)法制备了掺杂镨的纳米TiO2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,0.5%(摩尔分数,下同)Pr3+-TiO2纳米粉末为单一的锐钛型结构。通过粉体对2,4-二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,Pr3+-TiO2的光催化活性有较大提高,当Pr3+的掺入量为0.5%时催化活性最高。以高压汞灯为光源,2,4-二硝基苯酚的初始浓度为50mg.L-1、催化剂0.5%Pr3+-TiO2投加量为1.0 g.L-1时,2,4-二硝基苯酚的光催化降解效果最好。Nanometer praseodymium doped TiO2 powder was obtained from tetrabutyl titanate by solgel method. The phase and size were analyzed by XRD. After calcination at 500℃ for 2h, 0.5%（in mole percent）Pr^3＋ -TiO2 powders show that the nanocrystalline TiO2 with anatase phase. The photocatalytic oxidation properties were examined by the degradation of 2,4-dinitrophenol （2,4-DNP）. The results indicate that the photocatalytic activity of the composite particles is higher than that of pure ultrafine TiO2,and the optimum loading of Pr is 0. 5% （in mole percent）. Under illumination by high pressure mercury lamp ,the results show that when initial concentration of 2,4-DNP solution is 50mg · L^-1 ,amount of catalyst is 1.0 g · L^-1 ,the photocatalytic activity reaches the maximum.

关 键 词：溶胶-凝胶法 纳米二氧化钛 镨掺杂 2 4-二硝基苯酚 光催化氧化 

分 类 号：TQ134.1[化学工程—无机化工] O614.33[理学—无机化学]