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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (4): 271-275.    下一篇

研究通讯

二次嫁接法合成多金属氧酸盐/介孔分子筛杂化材料

王金娥 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环境科学学院 南京 210097)

  • 投稿日期:2008-07-14 修回日期:2008-10-13 发布日期:2009-02-28
  • 通讯作者: 杨春

Post-synthesis of Polyoxometalate/Mesoporous Molecular Sieve Hybrid Materials

Wang, Jine Yang, Chun*   

  1. (Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Environmental Science,
    Nanjing Normal University, Nanjing 210097)
  • Received:2008-07-14 Revised:2008-10-13 Published:2009-02-28
  • Contact: Yang, Chun

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被引次数

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合成了表面含有SiOH基团的钨磷酸盐衍生物(Bu4N)3PW11O39[O(SiOH)2] (TBAPW11Si2), 并通过其与纯硅介孔分子筛SBA-15表面SiOH的缩合反应, 将TBAPW11Si2二次嫁接到SBA-15的介孔孔道中, 得到了TBAPW11Si2/SBA-15介孔杂化材料. 表征结果显示, 孔内TBAPW11Si2的Keggin结构保留完整, 并与孔壁共价键联. 样品仍保持六方对称的孔阵结构, 但孔道部分被堵, 孔容、孔径、比表面积下降. 该杂化样品对甲基橙的光催化降解不仅显示高催化活性, 而且由于键联的多金属氧酸盐在水溶液中的抗浸取能力强, 催化剂的使用寿命大大延长.

关键词: 多金属氧酸盐, 二次嫁接, SBA-15, 介孔杂化材料

A tungstophosphate derivative, (Bu4N)3PW11O39[O(SiOH)2] (TBAPW11Si2), with SiOH groups on the surface was synthesized. Furthermore, a mesoporous hybrid silica material, TBAPW11Si2/SBA-15, was synthesized by grafting TBAPW11Si2 into the channels of SBA-15 via the condensation of SiOH groups on both surfaces. It is found that the Keggin units of TBAPW11Si2 remain perfectly in the hybrid material and are anchored onto the pore walls of SBA-15 by covalent linkage. However, the channels of the hybrid sample is partly blocked accompanied with a decrease in the pore volume, pore size and surface area, although the hexagonal packing of channels is mostly preserved. For the photocatalytic degradation of methyl orange, the hybrid material exhibits not only high catalytic activity but also a recycle performance due to the ability of the material against water-leaching.

Key words: polyoxometalate, post-synthesis, SBA-15, mesoporous hybrid material