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

doi:10.1016/j.micromeso.2014.07.053

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

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article

9 Citations (Scopus)

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 language	English
Pages (from-to)	11-17
Number of pages	7
Journal	Microporous and Mesoporous Materials
Volume	199
DOIs	https://doi.org/10.1016/j.micromeso.2014.07.053
Publication status	Published - 2014 Nov 15

All Science Journal Classification (ASJC) codes

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

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Noh, S. C., Lee, S. Y., Kim, S., Yoon, S., Shul, Y. G., & Jung, K. D. (2014). Synthesis of thermally stable porous SiC hollow spheres and control of the shell thickness. Microporous and Mesoporous Materials, 199, 11-17. https://doi.org/10.1016/j.micromeso.2014.07.053

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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.",

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AU - Kim, Sungrye

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AU - Shul, Yong Gon

AU - Jung, Kwang Deog

PY - 2014/11/15

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AB - 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.

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