Acta Chimica Sinica ›› 2012, Vol. 0 ›› Issue (04): 392-398.DOI: 10.6023/A1108024 Previous Articles     Next Articles

Full Papers

多金属氧酸盐/TiO2 介孔杂化材料的合成及光催化性能研究

许倩倩, 杨春   

  1. 江苏省生物功能材料重点实验室 南京师范大学化学与材料科学学院 南京 210097
  • 投稿日期:2011-08-02 修回日期:2011-10-09 发布日期:2011-11-01
  • 通讯作者: 杨春
  • 基金资助:

    国家自然科学基金(No. 20473037)、江苏高校优势学科建设工程和南京师范大学“211 工程”三期重点学科建设计划资助项目.

Synthesis of Polyoxometalate/TiO2 Mesoporous Hybrid Materials and Their Photocatalytic Performance

Xu Qianqian, Yang Chun   

  1. Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Material Science, Nanjing Normal University, Nanjing 210097
  • Received:2011-08-02 Revised:2011-10-09 Published:2011-11-01
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 20473037), the Priority Academic Program Development of Jiangsu Higher Education Institutions and the Leading Academic Discipline Program of 211 Project of Nanjing Normal University (the 3rd phase).

A tungstophosphate derivative, (Bu4N)3PW11O39[O(SiOH)2] (TBAPW11Si2), with Si-OH groups on the surface was grafted on mesoporous TiO2 synthesized by an evaporation-induced self-assembly method. Such TBAPW11Si2/TiO2 mesoporous hybrid materials were characterized by IR, XRD, N2 adsorption- desorption, TEM and ICP-AES techniques. It was shown that the covalent linkage between TBAPW11Si2 and TiO2 formed by condensation of Si-OH on TBAPW11Si2 with Ti-OH on TiO2. Enough Ti-OH groups on TiO2 surface and the calcination at a certain temperature were necessary for the condensation. Compared with TiO2 support, the hybrid samples had a little higher crystallinity of anatase, but the surface area, pore volume and pore size decreased as TBAPW11Si2 loading increased. In the degradation of methyl orange, these hybrid samples exhibited higher photocatalytic activities than anatase TiO2 support, and their activities were even comparable with that of Degussa P25 with much higher crystallinity, which can be mainly attributed to a synergistic effect between polyoxometalate and TiO2.

Key words: TiO2, polyoxometalate, grafting, mesoporous hybrid materials, photocatalysis