催化学报 ›› 2009, Vol. 30 ›› Issue (9): 939-944.

• 研究论文 • 上一篇    下一篇

磁性SiO2载体的表面改性与纳米TiO2光催化剂的固载

王丽燕1, 王红霞2, 王爱杰1, 刘敏2   

  1. 1哈尔滨工业大学城市水资源与水环境国家重点实验室, 黑龙江哈尔滨 150001 2哈尔滨师范大学先进功能材料与激发态省重点实验室, 黑龙江哈尔滨 150025
  • 收稿日期:2009-09-25 出版日期:2009-09-25 发布日期:2009-09-25

Surface Modification of a Magnetic SiO2 Support and Immobilization of a Nano-TiO2 Photocatalyst on It

WANG Liyan1, WANG Hongxia2,*, WANG Aijie1,#, LIU Min2   

  1. 1State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150001, Heilongjiang, China 2Provincial Key Laboratory for Nano-functionalized Materials and Excitated State, Harbin Normal University, Harbin 150025, Heilongjiang, China
  • Received:2009-09-25 Online:2009-09-25 Published:2009-09-25

摘要: 以 Fe3O4 纳米粒子为磁响应成分, 制备了 SiO2/Fe3O4 磁性载体, 采用回流热处理的方式对载体进行了表面改性. 利用傅里叶变换红外和 X-射线光电子能谱等手段对改性前后的载体进行分析. 结果表明, 载体改性后表面的 Si–O–Si 键数量明显减少, Si–OH 的数量有所增加. 以 TiO2 为探针催化剂, Procion 染料为探针分子, 考察了载体的表面改性对催化剂固载量和光降解催化活性的影响, 结果表明, 改性后的载体明显提高了 TiO2 催化剂的固载量和降解 Procion 的催化活性.

关键词: 二氧化硅, 四氧化三铁, 回流, 表面改性, 表面化学活性

Abstract: The surface chemical reactivity of the SiO2/Fe3O4 support was modified through heat treatment in an ethanol/water solution via refluxing. The increase in the content of surface hydroxyls on magnetic silica support after modification enhanced the loading of the TiO2 nanocatalyst and the photocatalytic activity towards photodegradation of Procion red MX-5B.

Key words: silicon dioxide, magnetite, refluxing, surface modification, surface chemical reactivity