A new route to monolithic macroporous SiC/C composites from biphenylene-bridged polysilsesquioxane gels

George Hasegawa, Kazuyoshi Kanamori, Kazuki Nakanishi, Teiichi Hanada

研究成果: Contribution to journalArticle査読

40 被引用数 (Scopus)

抄録

Macroporous polysilsesquioxane monoliths have been synthesized from biphenylene-bridged alkoxysilane via the sol-gel transition and concurrent phase separation both induced by the polycondensation reaction. The obtained polysilsesquioxane gels have been subsequently converted to macroporous SiC/C composites by the carbothermal reduction. The SiC/C monoliths thus obtained involve no visible cracks and their porosity reaches as high as >90%. In addition, according to the nitrogen adsorption-desorption measurement results, the micro- and mesopore characteristics of the samples did not undergo a significant change during the carbothermal reduction and the SiC/C composites have large specific surface areas owing to the microporous carbons in the skeletons. These composites therefore are more suitable for the applications to gas storage and catalyst supports compared to pure SiC.

本文言語英語
ページ(範囲)2541-2547
ページ数7
ジャーナルChemistry of Materials
22
8
DOI
出版ステータス出版済み - 4 27 2010

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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