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| Role of surfactant on dispersing nanospherical MCM-41 mesoporous molecular sieves |
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| 中国科学院金属研究所 |
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Cite this article:
. Role of surfactant on dispersing nanospherical MCM-41 mesoporous molecular sieves. Chin J Mater Res, 2005, 19(1): 23-27.
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Abstract Using polymer PEG as dispersant, cetyltrimethylammonium bromide (CTAB) as template
and tetraethylorthosilicate(TEOS) as silica source, the monodisperse nanospherical
MCM--41 mesoporous molecular sieves with the particle size of 40$\sim$60 nm were
synthesized under basic media conditions. The influence of the PEG concentration
on mesoporous structure and the dispersion of nanospheres were systemically studied.
It showed that the morphology of particles changed little, but the dispersion of
particles improved greatly. When polymer PEG was added, the mesoporous structure of
samples including hexagonal order and the pore size changed.
The samples still show perfect long--range order of hexagonal mesoporous
structures. With the concentrations of PEG increased, the $d_{100}$ values
of samples in the XRD patterns enlarge. With the suitable PEG concentration,
the monodisperse nanospherical MCM--41 mesoporous molecular sieves with
uniform diameters, single--pore distribution, huge pore volume, huge surface
area and highly ordered mesoporous structure could be obtained.
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Received: 11 March 2005
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