One-step direct synthesis of mesoporous aluminosilicates Al-SBA-15 with cage-like macropores by using micrometer-sized aluminum balls |
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Authors: | HuaQiang Cai DongYuan Zhao |
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Institution: | (1) Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Advanced Materials Laboratory, Fudan University, Shanghai, 200433, China |
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Abstract: | Ordered mesoporous aluminosilicate Al-SBA-15 materials with cage-like macropores have been synthesized by using micrometer-sized
aluminum balls as an Al source, tetraethyl orthosilicate (TEOS) as a silica source, and triblock copolymer Pluronic P123 as
a template. The resulting materials were fully characterized by XRD, N2 adsorption, SEM, TEM, ICP-AES, and 27Al MAS-NMR. The products (Al-SBA-15) have ordered two-dimensional (2-D) hexagonal mesostructures (space group p6mm). The calcined Al-SBA-15 materials exhibit disordered macropores with diameters of about 70–80 nm and ordered mesopores with
a diameter of ∼5 nm, a BET surface area of about 500 m2/g, Si/Al ratio of 40–80, and a ratio of tetrahedral Al to octahedral Al sites of about 2:1. This combination of properties
gives these materials potential applications in areas such as adsorption, catalysis and separation.
Supported by the National Natural Science Foundation of China (Grant Nos. 20890123 & 20721063), Shanghai Science & Technology
Committee (08DZ2270500), and Shanghai Leading Academic Discipline Project (No.B108) |
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Keywords: | synthesis mesoporous materials aluminum balls templating Al-SBA-15 |
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