掺杂钇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 Yttrium-Doped Nanometer TiO_2

作　　者：张俊卿[1] 冯德荣[2] 郭军平[3] 

机构地区：[1]内蒙古科技大学材料与冶金学院 [2]包头明天科技股份有限公司,内蒙古包头014010 [3]天津和平海湾电源集团有限公司,天津300384

出　　处：《稀土》2006年第6期52-54,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(so l-ge l)法制备了掺杂钇的纳米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,1.2%(摩尔分数)Y3+-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,Y3+-T iO2的光催化活性有较大提高,当Y3+的掺入量为1.2%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1.2%(摩尔分数)-T iO2投加量为1.0 g.L-1时,邻硝基苯酚的光催化降解效果最好。Nanometer yttrium doped TiO2 powder was obtained from tetrahutyl titanate by sol-gel method. The phase and size were analyzed by XRD. After calcination at 500℃ for 2h,1.2% （in mole per cent）Y^3＋-TiO2 powders show that the nanocrystalline TiO2 has anatase phase. The photocatalytic oxidation properties were examined hy 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 Y is 1.2% （in mole per cent）. Under illumination by high pressure mercury lamp ,the results show that when initial concentration of o-nitraphenol 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 掺杂 邻硝基苯酚 光催化氧化 

分 类 号：TQ134.1[化学工程—无机化工] O643.36[理学—物理化学]