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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
Lago, Rochel Montero
|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: <http://www.sciencedirect.com/science/article/pii/S0025540811000109>. 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.|
|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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