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| Preparation of monodisperse nanosized mesoporous silica |
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| 中国科学院金属研究所 |
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Cite this article:
. Preparation of monodisperse nanosized mesoporous silica. Chin J Mater Res, 2004, 18(2): 149-154.
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Abstract Using the cationic surfactant-cetyltrimethylammonium bromide (CTAB) as template, tetraethyl orthosilicate (TEOS) as silica source and nonionic surfactant--triblock copolymer F127 as dispersant, the monodisperse
nanosized mesoporous siliceous MCM--41 was prepared by room temperatural synthesis method in basic media. The samples were characterized by techniques such as XRD, TEM, HRTEM, SEM, IR and N$_{2}$ physisorption. In addition, the influences of different molar ratios of F127 to CTAB on mesoporous crystalline structure, surface structure, pore size distribution and the dispersity of nanosized mesoporous siliceous MCM--41 were also systemically studied. The results show that a suitable amount of F127 can greatly improve the ordered structure of pore array, while an excessive amount of F127 will destroy the ordered structure. When the
molar ratio of F127 to CTAB was ranged from 0.04 to 0.08, the synthesized samples were nanoparticle, monodispersed, single--pore distributed, huge pore volume and highly ordered mesoporous structure.
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Received: 21 May 2004
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