Synthesis and characterization of the mesoporous galloaluminosilicate molecular sieve MCM-41
- 1 January 1996
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 92 (2) , 289-292
- https://doi.org/10.1039/ft9969200289
Abstract
A range of mesoporous galloaluminosilicate molecular sieves with the MCM-41 structure and different compositions have been synthesized using gallium and aluminium nitrates as the source of Ga and Al and characterized using atomic absorption, powder X-ray diffraction (XRD) and 71Ga and 27Al magic-angle spinning (MAS) NMR. Ga, Al and Si are incorporated into the MCM-41 structure in proportions that clearly reflect the composition of the synthesis gel. NMR demonstrates that in all as-made and calcined samples gallium is four-coordinate and forms a part of the MCM-41 structure. However, 7% of Al is expelled from the structure of [120,1,3]-MCM-41 upon calcination.Keywords
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