Synthesis of a conducting SiO2-carbon composite from commercial silicone grease and its conversion to paramagnetic SiO2 particles

V. G. Pol; S. V. Pol; P. P. George; B. Markovsky; A. Gedanken

doi:10.1021/jp060919q

Synthesis of a conducting SiO₂-carbon composite from commercial silicone grease and its conversion to paramagnetic SiO₂ particles

V. G. Pol, S. V. Pol, P. P. George, B. Markovsky, A. Gedanken

Department of Chemistry

Bar-Ilan University

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

The thermal decomposition of commercial silicone grease was carried out in a closed reactor (Swagelok) that was heated at 800°C for 3 h, yielding a SiO₂-carbon composite with a BET surface area of 369 m²/g. The bulk conductivity. (5.72 × 10^-6 S·cm^-2) of the SiO₂-carbon composite was determined by impedance measurements. The as-prepared SiO₂-carbon composite was further annealed at 500°C in air for 2 h, which led to the formation of white paramagnetic silica particles (confirmed by ESR), possessing a surface area of 111 m²/g. The present synthetic technique requires unsophisticated equipment and a low-cost commercial precursor, and the reaction is carried out without a solvent, surfactant, or catalyst. The mechanism for the formation of a porous SiO₂-carbon composite from the silicone grease is also presented.

Original language	English
Pages (from-to)	13420-13424
Number of pages	5
Journal	Journal of Physical Chemistry B
Volume	110
Issue number	27
DOIs	https://doi.org/10.1021/jp060919q
State	Published - 13 Jul 2006

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abstract = "The thermal decomposition of commercial silicone grease was carried out in a closed reactor (Swagelok) that was heated at 800°C for 3 h, yielding a SiO2-carbon composite with a BET surface area of 369 m2/g. The bulk conductivity. (5.72 × 10-6 S·cm-2) of the SiO2-carbon composite was determined by impedance measurements. The as-prepared SiO2-carbon composite was further annealed at 500°C in air for 2 h, which led to the formation of white paramagnetic silica particles (confirmed by ESR), possessing a surface area of 111 m2/g. The present synthetic technique requires unsophisticated equipment and a low-cost commercial precursor, and the reaction is carried out without a solvent, surfactant, or catalyst. The mechanism for the formation of a porous SiO2-carbon composite from the silicone grease is also presented.",

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AU - Pol, V. G.

AU - Pol, S. V.

AU - George, P. P.

AU - Markovsky, B.

AU - Gedanken, A.

PY - 2006/7/13

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AB - The thermal decomposition of commercial silicone grease was carried out in a closed reactor (Swagelok) that was heated at 800°C for 3 h, yielding a SiO2-carbon composite with a BET surface area of 369 m2/g. The bulk conductivity. (5.72 × 10-6 S·cm-2) of the SiO2-carbon composite was determined by impedance measurements. The as-prepared SiO2-carbon composite was further annealed at 500°C in air for 2 h, which led to the formation of white paramagnetic silica particles (confirmed by ESR), possessing a surface area of 111 m2/g. The present synthetic technique requires unsophisticated equipment and a low-cost commercial precursor, and the reaction is carried out without a solvent, surfactant, or catalyst. The mechanism for the formation of a porous SiO2-carbon composite from the silicone grease is also presented.

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Synthesis of a conducting SiO₂-carbon composite from commercial silicone grease and its conversion to paramagnetic SiO₂ particles

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