Synthesis of thermally stable porous SiC hollow spheres and control of the shell thickness

Seong Cheol Noh, Seung Young Lee, Sungrye Kim, Sungho Yoon, Yong Gon Shul, Kwang Deog Jung

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Abstract

Thermally stable SiC hollow spheres were prepared using SiO2 templates with two layers. At the calcination at higher than 1300 °C, the SiC hollow sphere could be obtained. The shell thickness of the porous SiC hollow spheres can be controlled by the molar ratio of TMS/TEOS. The pore volumes and BET surface areas of the template SiO2 increased with the molar ratio of TMS/TEOS, while those of the SiC/SiO2 and SiC spheres decreased. It is evident that the pore sizes of the SiC hollow spheres were not influenced by the TMS/TEOS ratio. The wall thickness of the SiC sample increased with an increase in the TMS/TEOS mole ratio. The prepared SiC hollow spheres with the surface area higher than 770 m2/g were thermally stable up to temperatures higher than 700°C.

Original languageEnglish
Pages (from-to)11-17
Number of pages7
JournalMicroporous and Mesoporous Materials
Volume199
DOIs
Publication statusPublished - 2014 Nov 15

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

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