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|Title:||Post-synthesis alumination of MCM-41 by Al(NO3)3 (I): Improvement in acidity for purely siliceous MCM-41|
|Authors:||Kawi, S. |
|Source:||Kawi, S.,Shen, S.C. (2000). Post-synthesis alumination of MCM-41 by Al(NO3)3 (I): Improvement in acidity for purely siliceous MCM-41. Studies in Surface Science and Catalysis 129 : 219-226. ScholarBank@NUS Repository.|
|Abstract:||The effects of post-synthesis alumination on purely siliceous MCM-41 material with Al(NO3)3 on acidity have been studied by FTIR, NH3-TPD, and IPA decomposition reaction. The FTIR results of pyridine absorption show that both Lewis and Bronsted acid sites are increased by the post-modification. The amount of NH3 adsorbed on the alumina-modified MCM-41 samples increases with the loading of Al onto the surface of MCM-41. Due to the improved acidity, the alumina-modified MCM-41 materials show considerably higher catalytic activity for dehydration of isopropanol than purely siliceous MCM-41. In addition, XRD and N2 adsorption results show that all MCM-41 samples maintained their uniform hexagonal mesoporous structure well after they have been subjected to post-synthesis alumination with the loading of Al species on Si-MCM-41 varied from 0.1 wt. % up to 10 wt. % (calculated based on Al2O3). © 2000 Elsevier Science B.V. All rights reserved.|
|Source Title:||Studies in Surface Science and Catalysis|
|Appears in Collections:||Staff Publications|
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