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...

Full description

Saved in:
Bibliographic Details
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
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Porous materials
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm990044a