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 › peer-review

16 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

Bibliographical note

Funding Information:
The authors thank the Ministry of Science, ICT and Future Planning for financial support through a Korea CCS R&D Center (KCRC) grant and through the Nuclear Hydrogen Development and Demonstration (NHDD) project.

All Science Journal Classification (ASJC) codes

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

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10.1016/j.micromeso.2014.07.053

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title = "Synthesis of thermally stable porous SiC hollow spheres and control of the shell thickness",

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.",

author = "Noh, {Seong Cheol} and Lee, {Seung Young} and Sungrye Kim and Sungho Yoon and Shul, {Yong Gon} and Jung, {Kwang Deog}",

note = "Funding Information: The authors thank the Ministry of Science, ICT and Future Planning for financial support through a Korea CCS R&D Center (KCRC) grant and through the Nuclear Hydrogen Development and Demonstration (NHDD) project.",

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doi = "10.1016/j.micromeso.2014.07.053",

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AU - Noh, Seong Cheol

AU - Lee, Seung Young

AU - Kim, Sungrye

AU - Yoon, Sungho

AU - Shul, Yong Gon

AU - Jung, Kwang Deog

N1 - Funding Information: The authors thank the Ministry of Science, ICT and Future Planning for financial support through a Korea CCS R&D Center (KCRC) grant and through the Nuclear Hydrogen Development and Demonstration (NHDD) project.

PY - 2014/11/15

Y1 - 2014/11/15

N2 - 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.

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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JF - Microporous Materials

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

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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