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

George Hasegawa, Kazuyoshi Kanamori, Kazuki Nakanishi, Teiichi Hanada

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)2541-2547
Number of pages7
JournalChemistry of Materials
Volume22
Issue number8
DOIs
Publication statusPublished - Apr 27 2010

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'A new route to monolithic macroporous SiC/C composites from biphenylene-bridged polysilsesquioxane gels'. Together they form a unique fingerprint.

  • Cite this