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Issue 23, 2010
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Synthesis and characterization of monolithic, high surface area SiO2/C and SiC/C composites

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Abstract

In this study, the synthesis and characterization of high surface area carbon-supported silica and silicon carbide aerogels are presented. An activated carbon aerogel with surface area greater than 3000 m2 g−1 was used as a support for the sol–gel deposition of silica. The resulting silica-coated carbon aerogel retained a surface area greater than 2000 m2 g−1 and showed improved thermal stability in air. The carbon-supported silicon carbide aerogel was made by the carbothermal reduction of the silica-coated carbon aerogel under flowing Ar at 1500 °C. The resulting monolith maintained a surface area greater than 2000 m2 g−1 and was stable to temperatures approaching 600 °C, 100 °C higher than that of the pristine carbon aerogel.

Graphical abstract: Synthesis and characterization of monolithic, high surface area SiO2/C and SiC/C composites

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Publication details

The article was received on 11 Mar 2010, accepted on 14 Apr 2010 and first published on 10 May 2010


Article type: Paper
DOI: 10.1039/C0JM00661K
Citation: J. Mater. Chem., 2010,20, 4840-4844
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    Synthesis and characterization of monolithic, high surface area SiO2/C and SiC/C composites

    M. A. Worsley, J. D. Kuntz, J. H. Satcher, Jr and T. F. Baumann, J. Mater. Chem., 2010, 20, 4840
    DOI: 10.1039/C0JM00661K

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