Abstract
New and ordered 2D-hexagonal (p6mm) mesoporous aluminosilicates (CMI-11) have been synthesized in strongly alkaline media using aluminosilicate ester ((BusO)2-Al-O-Si-(OEt)3) as single-source molecular precursor and CTMABr as surfactant and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption-desorption and 27Al and 29Si MAS NMR spectroscopy. These mesoproous aluminosilicates exhibit a very low Si/Al ratio of 1.9 and highly thermal stable tetrahedral aluminum sites in the mesoporous walls. 27Al and 29Si MAS NMR spectroscopy indicates that the pore walls of CMI-11 are fully condensed with molecular homogeneity of Si-O-Al linkage. These materials are highly important in catalysis, in particular for the petroleum processing and the bulky molecules treatment.
Original language | English |
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Pages (from-to) | 123-128 |
Number of pages | 6 |
Journal | Catalysis Today |
Volume | 128 |
Issue number | 3-4 |
DOIs | |
Publication status | Published - 30 Oct 2007 |
Keywords
- Al-O-Si linkage
- Aluminosilicate ester
- Mesoporous aluminosilicate
- Molecular homogeneity
- Strong alkaline condition
- Synthesis