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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。
The tungstophosphate derivative (Bu4N) 3PW11O39 [O (SiOH) 2] (TBAPW11Si2) with SiOH groups on the surface was synthesized and its secondary reaction with SiOH on the surface of pure silica mesoporous molecular sieve SBA- Grafted onto the mesopore channel of SBA-15 to obtain TBAPW11Si2 / SBA-15 mesoporous hybrid material.The characterization results show that the Keggin structure of TBAPW11Si2 in the pore remains intact and is covalently linked to the pore wall.The sample still retains the hexagonal Symmetrical pore array structure, but the pore is partially blocked, the pore volume, pore diameter and specific surface area decrease.The photocatalytic degradation of methyl orange by the hybrid sample not only shows high catalytic activity, but also because the bonded polyoxometallate Anti-leaching ability of aqueous solution, the catalyst life is greatly extended.