Time-resolved in situ X-ray powder diffraction study of the formation of mesoporous silicates

被引：56

作者：

O'Brien, S

Francis, RJ

Fogg, A

O'Hare, D

Okazaki, N

Kuroda, K

机构：

[1] Univ Oxford, Inorgan Chem Lab, Oxford OX1 3QR, England

[2] Waseda Univ, Dept Appl Chem, Shinjuku Ku, Tokyo 169, Japan

[3] Waseda Univ, Kagami Mem Lab Mat Sci & Technol, Shinjuku Ku, Tokyo 169, Japan

来源：

CHEMISTRY OF MATERIALS | 1999年 / 11卷 / 07期

关键词：

D O I：

10.1021/cm990044a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

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页码：1822 / 1832

页数：11

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