液相沉积法制备可磁分离复合光催化剂纳米球及其催化性能  

Photocatalytic properties of magnetically separable composite photocatalyst nanosphere prepared by liquid-phase deposition

作　　者：许士洪[1] 谭东栋[1] 鲁巍 时鹏辉[1] 毕得福[1] 马春燕[1] 上官文峰[3] 

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]北京市市政设计研究总院,北京100082 [3]上海交通大学机械与动力工程学院燃烧与环境技术研究中心,上海200240

出　　处：《催化学报》2013年第2期367-372,共6页

基　　金：上海市自然科学基金(11ZR1400400;11ZR1400800);中央高校基本科研业务费专项资金(12D11303);上海市重点学科建设项目(B604)~~

摘　　要：采用反胶束和液相沉积法制备了一种可磁分离的复合光催化剂纳米球TiO2@SiO2@NiFe2O4,并运用X射线衍射和透射电镜对样品进行了表征.结果表明,NiFe2O4纳米粒子被包裹在SiO2内形成磁性SiO2@NiFe2O4纳米球载体,纳米TiO2粒子沉积于其表面,形成TiO2光催化壳层.光降解实验结果表明,当沉积液中硼酸与六氟钛酸铵的摩尔比为4,焙烧温度为300C时,制备的纳米球催化剂表现出最佳的光催化活性.A novel magnetically separable composite photocatalyst nanosphere TiO2@SiO2@NiFe2O4 was prepared by a reverse micelle method and liquid phase deposition techniqueand characterized by X-ray diffraction and transmission electron microscopy.The results indicated that the nickel ferrite core nanoparticles are completely encapsulated into silica nanospheres as a support(SiO2@NiFe2O4), and titania nanoparticles are deposited onto the surface of SiO2@NiFe2O4 nanospheres, forming a TiO2 shell for photocatalysis.The degradation experiments of methyl orange indicated that when the molar ratio of H3BO3 to [TiF6]2? is set at 4, the as-prepared photocatalyst calcined at 300 ℃ presents the highest photocatalytic activity.

关 键 词：二氧化钛 二氧化硅 铁酸镍 光催化 纳米球 液相沉积 包覆 

分 类 号：O643.36[理学—物理化学] TB383.1[理学—化学]