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Título : | Facile preparation of carbon coated magnetic Fe3O4 particles by a combined reduction/CVD process. |
Autor : | Tristão, Juliana Cristina Oliveira, Aline A. S. Ardisson, José Domingos Dias, Anderson Lago, Rochel Montero |
Palabras clave : | Magnetic materials Vapor deposition Surface properties |
Fecha de publicación : | 2011 |
Citación : | 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. |
Resumen : | 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. |
URI : | http://www.repositorio.ufop.br/handle/123456789/4890 |
metadata.dc.identifier.doi: | https://doi.org/10.1016/j.materresbull.2011.01.008 |
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. |
Aparece en las colecciones: | DEQUI - Artigos publicados em periódicos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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ARTIGO_FacilePreparationCarbon.pdf | 1,21 MB | Adobe PDF | Visualizar/Abrir |
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