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无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

磁性纳米TiO2/SiO2/Fe3O4光催化剂的制备及表征

廖振华1,2; 陈建军2; 姚可夫1; 赵方辉2; 李荣先2   

  1. 1. 清华大学机械工程系, 北京 100084; 2. 清华大学深圳研究院新材料与生物工程重点实验室, 深圳 518057
  • 收稿日期:2003-06-27 修回日期:2003-09-11 出版日期:2004-07-20 网络出版日期:2004-07-20

Preparation and Characterization of Nanometer-sized Magnetic Photocatalyst TiO2/SiO2/Fe3O4

LIAO Zhen-Hua1,2; CHEN Jian-Jun2; YAO Ke-Fu1; ZHAO Fang-Hui2; LI Rong-Xian2   

  1. 1.Department of Mechanical Engineering; Tsinghua University; Beijing 100084; China; 2.New Materials and Bio-Technology Key Laborary; Research Institute of Tsinghua University in Shenzhen; Shenzhen 518057; China
  • Received:2003-06-27 Revised:2003-09-11 Published:2004-07-20 Online:2004-07-20

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摘要： 以纳米Fe3O4磁粉为核心,采用溶胶-凝胶法制备了TiO2/SiO2/Fe3O4复合光催化剂。用XRD、TEM及元素分析对其结构和表面形貌进行了表征。以具有偶氮染料结构的甲基橙水溶液为目标反应物,评价其光催化活性。结果表明,所制TiO2/SiO2/Fe3O4样品为双层包覆型结构,SiO2为中间层,最外层是锐钛矿型的TiO2。该复合光催化剂对甲基橙溶液有较高的光催化活性,并具有可利用其磁性回收重用的特点,应用前景广泛。

关键词: TiO2/SiO2/Fe3O4, 包覆, 磁性, 光催化

Abstract: By using nanometer-sized Fe3O4 as support, TiO2/SiO2/Fe3O4 coated particles were prepared by a sol-gel method. Its structure and morphology were
characterized by XRD, TEM, and element analysis methods. The photocatalytic reactivity of TiO2/SiO2/Fe3O4 was studied with methyl orange
solution. The results indicate that the TiO2/SiO2/Fe3O4 two-double coated particles are composed of SiO2 mesosphere and anatase
TiO2 crust. The new photocatalyst has not only excellent photocatalytic activity but also good magnetic property that can make the callback easy.

Key words: TiO2/SiO2/Fe3O4, coating, magnetic, photocatalysis

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