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|Title:||A comparison of post-synthesis alumination and sol-gel synthesis of MCM-41 with high framework aluminum content|
|Authors:||Chen, L.Y. |
Thermal stability, acidity
|Citation:||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|
|Appears in Collections:||Staff Publications|
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