Chemical Design of Carbon-Coated Al<sub>2</sub>O<sub>3</sub> Nanoparticles

Authors

  • L. F. Sharanda Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • I. V. Babich Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine
  • Yu. V. Plyuto Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine

Abstract

The novel approach to chemical design of carbon-coated Al2O3 nanoparticles with an average particle size of 8-10 nm was developed. Carbon coating was synthesised by modification of fumed alumina support with 4,4’-methylenebis-(phenylisocyanate) and its subsequent pyrolysis at 700oC. In order to synthesise the samples with increased carbon content, the grafting-pyrolysis cycle was repeated. The above mentioned synthetic route resulted in the samples with carbon loading of 7.6 and 14.5 wt.%. Characterisation of the synthesised samples with Raman, FTIR, TG/DTG-DTA, N2 adsorption and SEM techniques revealed the formation of continuous carbon coating on the surface of Al2O3 nanoparticles after the first grafting-pyrolysis cycle. The increase of the carbon loading on the alumina surface to 14.5 wt.% (two grafting-pyrolysis cycles) resulted in the formation of the carbon coating with more regular graphitic structure.

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(1)
Sharanda, L. F.; Babich, I. V.; Plyuto, Y. V. Chemical Design of Carbon-Coated Al<sub>2< sub>O<sub>3< Sub> Nanoparticles. Him. Fiz. Tehnol. Poverhni 2010, 1, 326-332.

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Vol. 1 No. 3 (2010): Chemistry, Physics and Technology of Surface / Himia, Fizika ta Tehnologia Poverhni

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