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Title: Facile preparation of carbon coated magnetic Fe3O4 particles by a combined reduction/CVD process.
Authors: Tristão, Juliana Cristina
Oliveira, Aline A. S.
Ardisson, José Domingos
Dias, Anderson
Lago, Rochel Montero
Keywords: Magnetic materials
Vapor deposition
Surface properties
Issue Date: 2011
Citation: TRISTÃO, J. C. et al. Facile preparation of carbon coated magnetic Fe3O4 particles by a combined reduction/CVD process. Materials Research Bulletin, v. 46, p. 748-754, 2011. Disponível em: <>. Acesso em: 02 fev. 2015.
Abstract: In this work, we report a simple method for the preparation of magnetic carbon coated Fe3O4 particles by a single step combined reduction of Fe2O3 together with a Chemical Vapor Deposition process using methane. The temperature programmed reactionmonitored by Mo¨ ssbauer, X-ray Diffraction and Raman analyses showed that Fe2O3 is directly reduced by methane at temperatures between 600 and 900 8C to produce mainly Fe3O4 particles coated with up to 4 wt% of amorphous carbon. Thesemagneticmaterials can be separated into two fractions by simple dispersion in water, i.e., a settled material composed of large magnetic particles and a suspended material composed of nanoparticles with an average size of 100–200 nm as revealed by Scanning Electron Microscopy and High-resolution Transmission Electron Microscopy. Different uses for these materials, e.g., adsorbents, catalyst supports, rapid coagulation systems, are proposed.
ISSN: 0025-5408
metadata.dc.rights.license: O periódico Materials Research Bulletin concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3577180915444.
Appears in Collections:DEQUI - Artigos publicados em periódicos

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