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Synthesis and Characterization of Functionalized Mesoporous Silica by Aerosol-Assisted Self-Assembly
journal contribution
posted on 2006-05-02, 00:00 authored by Xiangling Ji, Qingyuan Hu, J. Eric Hampsey, Xuepeng Qiu, Lianxun Gao, Jibao He, Yunfeng LuAn efficient, productive, and low-cost aerosol-assisted self-assembly process has been developed to
produce organically modified mesoporous silica particles via a direct co-condensation of silicate species
and organosilicates that contain nonhydrolyzable functional groups in the presence of templating surfactant
molecules. Different surfactants including cetyltrimethylammonium bromide, nonionic surfactant Brij-56, and triblock copolymer P123 have been used as the structure-directing agents. The organosilanes
used in this study include tridecafluoro-1,1,2,2-tetrahydrooctyltriethoxysilane, methytriethoxysilane,
vinyltrimethoxysilane, and 3-(trimethoxysilyl)propyl methacrylate. X-ray diffraction and transmission
electron microscopy studies indicate the formation of particles with various mesostructures. Fourier
transform infrared and solid-state nuclear magnetic resonance spectra confirm the organic ligands are
covalently bound to the surface of the silica framework. The porosity, pore size, and surface area of the
particles were characterized using nitrogen adsorption and desorption measurements. This method provides
a direct synthesis route to efficiently synthesize a large variety of organic functionalized mesoporous
silica particles with controlled pore sizes, pore surface chemistry, and pore structures for catalyst, filler,
and other applications.
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surface areatemplating surfactant moleculessynthesis routeresonance spectratransmission electron microscopy studiespore surface chemistryfunctionalized mesoporous silica particlessilicate speciestriblock copolymer P 123pore sizeFunctionalized Mesoporous SilicaDifferent surfactantsdesorption measurementsmesoporous silica particlespore structurespore sizescetyltrimethylammonium bromidenitrogen adsorptionsilica framework
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