Please use this identifier to cite or link to this item:
Title: Thermal and hydrothermal stability of framework-substituted MCM-41 mesoporous materials
Authors: Chen, L.Y. 
Jaenicke, S. 
Chuah, G.K. 
Keywords: Hydrothermal stability
Pore structure
Thermal stability
Issue Date: 1997
Citation: Chen, L.Y.,Jaenicke, S.,Chuah, G.K. (1997). Thermal and hydrothermal stability of framework-substituted MCM-41 mesoporous materials. Microporous Materials 12 (4-6) : 323-330. ScholarBank@NUS Repository.
Abstract: The thermal and hydrothermal stability of framework-substituted MCM-41 with a Si/M molar ratio of 40 (M = Al, Ti) is assessed. Si-MCM-41 with 2.5% substitution of Si by either Al or Ti remains mesoporous when calcined in air at temperatures up to 800°C. The pore structure of Si-MCM-41 and Al-MCM-41 collapses at a calcination temperature of above 800°C, while pore collapse occurs at about 100°C higher for Ti-MCM-41. The addition of La2O3 to Al-MCM-41 improves its thermal stability at lower temperatures, but has no effect at higher temperatures. When MCM-41 materials are treated in pure distilled water at 25-100°C for 4 h, Si-MCM-41 suffers a significant loss of BET surface area, while Al-MCM-41 and Ti-MCM-41 are more stable towards such treatment. All the samples investigated are stable in an acidic solution of pH 2, but disintegrate rapidly in a strongly basic medium (pH 12). © 1997 Elsevier Science B.V.
Source Title: Microporous Materials
ISSN: 09276513
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

checked on Sep 21, 2019

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.