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Issue 10, 2002
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A hydrothermal post-synthesis route for the preparation of high quality MCM-48 silica with a tailored pore size

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Abstract

A post-synthesis hydrothermal restructuring method is introduced as a convenient route to synthesize high quality MCM-48 silica with controllable pore size. Using tetraethyl orthosilicate as the silica source and cetyltrimethylammonium bromide (CTAB) as the template, the pore size could be tailored from 2.6 to 4.2 nm without using organic additives other than CTAB. It was shown by means of nitrogen adsorption, X-ray diffraction, transmission electron microscopy, and scanning electron microscopy that the improved long range structural order and the expanded pore size of the materials depends on the treatment conditions, such as the CTA+ concentration, the amount of NH4OH added, and the aging temperature during the post-synthesis procedure.

Graphical abstract: A hydrothermal post-synthesis route for the preparation of high quality MCM-48 silica with a tailored pore size

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Publication details

The article was received on 12 Jun 2002, accepted on 18 Jul 2002 and first published on 16 Aug 2002


Article type: Paper
DOI: 10.1039/B205646A
Citation: J. Mater. Chem., 2002,12, 3016-3020
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    A hydrothermal post-synthesis route for the preparation of high quality MCM-48 silica with a tailored pore size

    J. Sun and M. Coppens, J. Mater. Chem., 2002, 12, 3016
    DOI: 10.1039/B205646A

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