Chemical Design of Carbon-Coated Al2o3 Nanoparticles

• Main Authors: Sharanda, L.F., Babich, I.V., Plyuto, Yu.V.
• Format: Article
• Language: English
• Published: Інститут хімії поверхні ім. О.О. Чуйка НАН України 2010
• Series: Хімія, фізика та технологія поверхні
• Subjects: Неорганічні та вуглецеві наноматеріали і наносистеми
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/29002

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.