Novel route in the synthesis of MCM-41 containing framework aluminum and its characterization
Novel route in the synthesis of MCM-41 containing framework aluminum and its characterization
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DOI：
10.1016/s1387-1811(99)00089-x
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发表时间：
1999-11-15
影响因子：
5.2
通讯作者：
Unger, K
中科院分区：
文献类型：
--
作者：
Matsumoto, A;Chen, H;Unger, K
以正硅酸乙酯和异丙醇铝为原料，氨水为催化剂，合成了含结构铝的介孔分子筛MCM-41。该方法可在1小时内得到硅铝比为13-297的Al-MCM-41，对应于0.3-7mol%Al。X射线衍射和氮气吸附测试表明，用该方法制备的Al-MCM-41具有高度有序的孔阵列结构。这些样品中的大部分Al原子以四面体的形式结合在MCM-41结构中，这导致了骨架中的阳离子位置。(C)1999 Elsevier Science B.V.保留所有权利。
Mesoporous molecular sieve MCM-41 with incorporated structural aluminum (Al-MCM-41) was prepared by hydrolysis of a solution of tetraethoxysilane and aluminum isopropoxide in the presence of ammonia as a catalyst. This method provides Al-MCM-41 of different Si/Al ratios from 13 to 297 corresponding to 0.3-7 mol% Al within an hour. X-ray diffraction and nitrogen adsorption measurements showed that the Al-MCM-41 prepared by this method had a highly ordered structure of pore arrays. Most Al atoms in these samples were incorporated tetrahedrally in the MCM-41 structure, which gave rise to cationic sites in the framework. (C) 1999 Elsevier Science B.V. All rights reserved.