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© Research
Publication : The journal of physical chemistry. B

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

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The journal of physical chemistry. B - 13 Jul 2006

Pol VG, Pol SV, George PP, Markovsky B, Gedanken A

Link to Pubmed [PMID] – 16821865

J Phys Chem B 2006 Jul;110(27):13420-4

The thermal decomposition of commercial silicone grease was carried out in a closed reactor (Swagelok) that was heated at 800 degrees C for 3 h, yielding a SiO2-carbon composite with a BET surface area of 369 m2/g. The bulk conductivity (5.72 x 10(-6) S x cm(-2)) of the SiO2-carbon composite was determined by impedance measurements. The as-prepared SiO2-carbon composite was further annealed at 500 degrees 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.

https://www.ncbi.nlm.nih.gov/pubmed/16821865