Issue 1, 2004
From the journal:

Journal of Materials Chemistry

Structural study by transmission and scanning electron microscopy of the time-dependent structural change in M41S mesoporous silica (MCM-41 to MCM-48, and MCM-50)

Isabel Díaz,*a   Joaquin Pérez-Parientea  and  Osamu Terasaki†b  

* Corresponding authors

a Instituto de Catálisis y Petroleoquímica, CSIC, Campus Cantoblanco, -Madrid, Spain
E-mail: idiaz@icp.csic.es
Fax: +34-91-5854760
Tel: +34-91-5854795

b Department of Physics, Tohoku University, Sendai, Japan

Abstract

High resolution transmission electron microscopy and field emission scanning electron microscopy are used to provide direct evidence for the solid-state transformations from cubic MCM-48 to lamellar mesophases. The structural change from MCM-41 to MCM-48 and MCM-50 with temperature is described in this report. Initially, a meta-stable MCM-41 is formed at room temperature, which turns into MCM-48 after a few hours at 140 °C. Thermal treatment over longer periods of time leads to the formation of a lamellar phase. Thermogravimetric studies are presented for a better understanding of the surfactant–silica system and its modifications with temperature.

Graphical abstract: Structural study by transmission and scanning electron microscopy of the time-dependent structural change in M41S mesoporous silica (MCM-41 to MCM-48, and MCM-50)

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Article information

DOI
https://doi.org/10.1039/B310281E
Article type
Paper
Submitted
26 Aug 2003
Accepted
07 Nov 2003
First published
02 Dec 2003

J. Mater. Chem., 2004,14, 48-53

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Structural study by transmission and scanning electron microscopy of the time-dependent structural change in M41S mesoporous silica (MCM-41 to MCM-48, and MCM-50)

I. Díaz, J. Pérez-Pariente and O. Terasaki, J. Mater. Chem., 2004, 14, 48 DOI: 10.1039/B310281E

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