Synthesis and Magnetic Characterization of Graphite-Coated Iron Nanoparticles

Autor: A. M. Espinoza-Rivas, M. A. Pérez-Guzmán, R. Ortega-Amaya, J. Santoyo-Salazar, C. D. Gutiérrez-Lazos, M. Ortega-López
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Journal of Nanotechnology, Vol 2016 (2016)
Druh dokumentu: article
ISSN: 1687-9503
1687-9511
DOI: 10.1155/2016/6571643
Popis: Graphite-coated iron nanoparticles were prepared from magnetite nanoparticles by chemical vapour deposition (CVD) under methane and hydrogen atmosphere. After being purified from carbon excess, graphite-coated iron nanoparticles were tested for morphological and magnetic properties. It was found that, during the thermal process, magnetite nanoparticles 6 nm in size coalesce and transform into graphite-coated iron 200 nm in size, as revealed by scanning electron microscopy (SEM). Raman characterization assessed that high-quality graphite coats the iron core. Magnetic measurements revealed the phase change (magnetite to iron) as an increase in the saturation magnetization from 50 to 165 emu/g after the CVD process.
Databáze: Directory of Open Access Journals
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