Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 151, Issue -, Pages 142-148Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2011.11.001
Keywords
Macrosphere; Mesoporous silica; Hollow nanosphere; Morphology controlling; Self-modeling
Categories
Funding
- National NSFC [21173117, 20871067, 20873059]
- MSTC [2008AA06Z327]
- National Basic Research Program of China [2007CB613301]
- Analysis Center of Nanjing University
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Large mesoporous silica spheres with centimeter-scale were synthesized for the first time via a multi-level self-assembly using an emulsion system of ethyl ether, tetraethyl orthosilicate (TEOS) and cetyltrimethylammonium bromide (CTAB) surfactant. Apart from the controllable morphology and size, the inorganic hybrid or organic functionalized self-molding mesoporous materials could also be synthesized through one-pot method, that is, the synthesis and functionalization and self-molding with special morphology of the mesoporous material were realized simultaneously. According to the analysis of SEM, TEM, XRD and N-2 adsorption-desorption, the obtained macroscopic spheres were composed of nanosized silica spheres, which possessed relatively ordered mesostructure. Moreover, the obtained macroscopic silica spheres could resist a pressure of 46 N cm(-2). The adsorption of phenylalanine was performed to assess the performance of these macrospheres, in which the adsorption capacity of aminopropyl triethoxysilane (APTES) functionalized sample was up to 196 mg g(-1), twice higher than the best value reported in the literature. (c) 2011 Elsevier Inc. All rights reserved.
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