催化学报

催化学报 ›› 2013, Vol. 34 ›› Issue (2): 367-372.DOI: 10.3724/SP.J.1088.2013.20766

• 研究论文 • 上一篇    下一篇

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

许士洪1,*, 谭东栋1, 鲁巍2, 时鹏辉1, 毕得福1, 马春燕1, 上官文峰3   

  1. 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
  • 收稿日期:2012-08-30 修回日期:2012-10-10 出版日期:2013-02-05 发布日期:2013-02-05

Photocatalytic Properties of Magnetically Separable Composite Photocatalyst Nanosphere Prepared by Liquid-Phase Deposition

XU Shihong1,*, TAN Dongdong1, LU Wei2, SHI Penghui1, BI Defu1, MA Chunyan1, SHANGGUAN Wenfeng3   

  1. 1College of Environmental Science and Engineering, Donghua University, Shanghai 201620; 2Beijing General Municipal Engineering Design & Research Institute, Beijing 100082; 3Research Center for Combustion and Environment Technology, School of Mechanical and Power Engineering, Shanghai Jiao Tong University, Shanghai 200240
  • Received:2012-08-30 Revised:2012-10-10 Online:2013-02-05 Published:2013-02-05

PDF

791

被引次数

15

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 300 oC 时, 制备的纳米球催化剂表现出最佳的光催化活性.

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

Abstract: A novel magnetically separable composite photocatalyst nanosphere TiO2@SiO2@NiFe2O4 was prepared by a reverse micelle method and liquid phase deposition technique and 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 °C presents the highest photocatalytic activity.

Key words: titania, silica, nickel ferrite, photocatalysis, nanosphere, liquid-phase deposition, coating