Improved large mesoporous ordered molecular sieves—Stabilization and acid/base functionalization
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- 作者：Hendrik Kosslick ; Irene Pitsch ; Jens Deutsch ; Marga-Martina Pohl ; Axel Schulz ; Vu Anh Tuan ; Nguyen Dinh Tuyen ; Ligia Frunza ; Christian Jaeger
- 关键词：Nanoporous molecular sieve ; Al substitution ; Stability ; Synthesis ; Acidity ; Catalysis
- 刊名：Catalysis Today
- 出版年：2010
- 出版时间：1 July 2010
- 年：2010
- 卷：152
- 期：1-4
- 页码：54-60
- 全文大小：1294 K
文摘
The preparation of nanoporous materials with enhanced stability using an improved synthesis route using reactive inorganic silica and alumina species is reported. This way improved mesoporous molecular sieves were obtained. The synthesized aluminum substituted mesoporous molecular materials (Al-MMS) contain very large pores of 50–200 Å size combined with an improved pore wall thickness. Increased wall thickness and Al substitution lead to an improved chemical stability against alkaline solution. The textural, structural and acid properties are investigated by physico-chemical methods. The catalytic performance acidic materials was tested in the benzoylation reaction; amino functionalized materials were studied in the base catalyzed Michael addition.