Kinetic study of MCM-41 synthesis

A kinetic study of MCM-41-type materials formation has been made to optimize the synthesis conditions in particular the synthesis time and temperature. The changes in morphology and textural properties of materials as a function of hydrothermal synthesis time at four different temperatures have been...

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Bibliographic Details
Published in:The international journal of inorganic materials 2001-01, Vol.3 (1), p.75-86
Main Authors: Blin, J.L., Otjacques, C., Herrier, G., Su, Bao-Lian
Format: Article
Language:English
Subjects:
Effect of heating time and temperature
MCM-41
Mesoporous materials
Synthesis mechanism
Wall thickness
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Summary:A kinetic study of MCM-41-type materials formation has been made to optimize the synthesis conditions in particular the synthesis time and temperature. The changes in morphology and textural properties of materials as a function of hydrothermal synthesis time at four different temperatures have been followed. From the characterization results, the synthesis mechanism is postulated. The present work shows clearly that the thickness of the wall separating two adjacent pores increases with hydrothermal synthesis time and temperature while pore size remains constant. The increase in the wall thickness, indicating the enhancement of polycondensation of silica around the micelles of surfactant, should be very important for strengthening the thermal stability of MCM-41 materials.
ISSN:1466-6049
1466-6049
DOI:10.1016/S1466-6049(00)00043-X