Time-Resolved in Situ X-ray Powder Diffraction Study of the Formation of Mesoporous Silicates

In situ, time-resolved energy-dispersive X-ray diffraction has been used to investigate the formation of the mesoporous silicates FSM-16 and MCM-41. The data suggest that the silica−surfactant mesophases formed are highly dependent on the reactant medium, the effect of the silica source being one of...

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Published in:Chemistry of materials 1999-07, Vol.11 (7), p.1822-1832
Main Authors: O'Brien, Stephen, Francis, Robin J, Fogg, Andrew, O'Hare, Dermot, Okazaki, Nanae, Kuroda, Kazuyuki
Format: Article
Language:English
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Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Porous materials
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container_issue 7
container_start_page 1822
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creator O'Brien, Stephen
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description In situ, time-resolved energy-dispersive X-ray diffraction has been used to investigate the formation of the mesoporous silicates FSM-16 and MCM-41. The data suggest that the silica−surfactant mesophases formed are highly dependent on the reactant medium, the effect of the silica source being one of the main determining factors. Kanemite, a layered polysilicate, proves to be an excellent silicate source, giving rise to relatively ordered mesophases and subsequent highly ordered mesoporous silicate products. The time-resolved in situ X-ray diffraction data of the kanemite−alkytrimethylammonium system indicated that the silica−surfactant mesophase precursor to FSM-16 forms from a medium containing a number of intercalated silicate phases, while in contrast, the hexagonal mesophase precursor to MCM-41 forms from a medium containing no other ordered silicate−surfactant phases detectable by in situ X-ray diffraction.
doi_str_mv 10.1021/cm990044a
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source American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Porous materials
title Time-Resolved in Situ X-ray Powder Diffraction Study of the Formation of Mesoporous Silicates
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