期刊
JOURNAL OF CRYSTAL GROWTH
卷 312, 期 16-17, 页码 2465-2471出版社
ELSEVIER
DOI: 10.1016/j.jcrysgro.2010.05.024
关键词
Transmission electron microscopy; CoxFe3-xO4; Nanomaterials
资金
- France-Tunisia Cooperation Program [CMCU 06/S1309]
Cobalt ferrites (CoxFe3-xO4) nanoparticles with various compositions were synthesized by a new non-aqueous synthesis method. The cobalt ferrites were characterized by X-ray diffraction and transmission electron microscopy coupled with energy dispersive spectroscopy. The nanoparticles are highly crystallized with a homogeneous chemical composition. The particle size varies from 4 up to 7.5 nm, depending on the cobalt content. The smallest particles, with a size of 4 nm, are obtained for high cobalt content. These particles also have the highest micro-structural strain. Catalytic measurements were realized using Fourier transform infrared spectroscopy. The lowest activation energy and the highest conversion rate are obtained for Co1.8Fe2.4O4 in the 400-500 degrees C temperature range. (C) 2010 Elsevier B.V. All rights reserved.
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