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Ordered mesoporous aluminosilicates with very low Si/Al ratio and stable tetrahedral aluminum sites for catalysis |
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| Authors: | Xiao-Yu Yang, Aur lien Vantomme, Feng-Shou Xiao,Bao-Lian Su |
| Affiliation: | aLaboratory of Inorganic Materials Chemistry (CMI), The University of Namur (FUNDP), 61, rue de Bruxelles, B-5000 Namur, Belgium bCollege of Chemistry & State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130023, China |
| 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. |
| Keywords: | Mesoporous aluminosilicate Synthesis Strong alkaline condition Molecular homogeneity Al–O–Si linkage Aluminosilicate ester |
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