Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/92929
Title: A comparison of post-synthesis alumination and sol-gel synthesis of MCM-41 with high framework aluminum content
Authors: Chen, L.Y. 
Ping, Z.
Chuah, G.K. 
Jaenicke, S. 
Simon, G.
Keywords: 27Al MAS-NMR
Mesoporous Al-MCM-41
Post-synthesis alumination
Thermal stability, acidity
Issue Date: Feb-1999
Source: Chen, L.Y.,Ping, Z.,Chuah, G.K.,Jaenicke, S.,Simon, G. (1999-02). A comparison of post-synthesis alumination and sol-gel synthesis of MCM-41 with high framework aluminum content. Microporous and Mesoporous Materials 27 (2-3) : 231-242. ScholarBank@NUS Repository.
Abstract: Aluminum-containing mesoporous MCM-41 materials were prepared by post-synthesis modification of a purely siliceous MCM-41 using different Al sources: AlCl3, aluminum isopropoxide and NaAlO2. The structure, thermal stability and acidity of these materials have been investigated and compared with Al-MCM-41 prepared by direct hydrothermal synthesis. Irrespective of the preparation method, the surface area, pore diameter, crystallinity and thermal stability of Al-MCM-41 decrease with increasing Al content. Post-synthesis modified materials possess better thermal stability, and this method allows for the incorporation of more aluminum without disintegration of the mesoporous structure as compared to Al-MCM-41 prepared by direct hydrothermal synthesis. The post-synthesized Al-MCM-41 has a moderate acidity, comparable to that of the direct hydrothermally-synthesized material.
Source Title: Microporous and Mesoporous Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/92929
ISSN: 13871811
Appears in Collections:Staff Publications

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