期刊
LANGMUIR
卷 26, 期 22, 页码 17603-17616出版社
AMER CHEMICAL SOC
DOI: 10.1021/la1033355
关键词
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资金
- Belgian Federal Government [1NANOMAT, P6/17]
- Belgium-Viet Nam bilateral cooperation [BL/13/V11]
- European Union
- European Union and the Walloon community
A novel yet facile synthesis pathway has been developed for the design of hierarchically structured macro-mesoporous aluminosilicates with high aluminum content at tetrahedral sites using a single molecular bifunctional alkoxide (sec-BuO)(2)-Al-O-Si(OE1)(3) precursor. The use of carboxylate ligands and a highly alkaline media slow down the polymerization rate of the aluminum alkoxide functionality, thus permitting the preservation of the intrinsic Al-O-Si linkage. The hierarchically structured porous :aluminosilicate materials present an unprecedented low Si/Al ratio close to 1. Heat treatment applied to the synthesized material seems to favor the incorporation of aluminum into tetrahedral position (intraframework aluminum species). The macro-mesoporosity was spontaneously venerated, without the use of any external templating agent, by the hydrodynamic now (lithe solvents released during the rapid hydrolysis and condensation processes of this double alkoxide. This method results in materials with an open array of interconnected macrochannels. The synthesized aluminosilicate materials with tailorable macro-mesoporous hierarchy and very high AI content at tetrahedral position hold huge promise in various applications as catalysts. catalysts supports, or adsorbents.
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