Journal
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
Volume 74, Issue 9, Pages 1275-1280Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2013.04.004
Keywords
Magnetic materials; Chemical synthesis; Electron microscopy; Magnetic properties
Funding
- Doctoral Program Foundation of Liaoning Province [20091047]
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Transition metal (Fe, Co and Ni)-doped carbon xerogels were synthesized by a facile one-pot pyrolysis of the sol gel polymer of resorcinol and formaldehyde in the presence of the corresponding metal nitrates. N-2 adsorption-desorption, scanning and transmission electron microscopy proved that addition of different metals could exert a remarkable influence on the textural properties. From X-ray diffraction the phases of the metallic species were identified. Scanning electron microscopy images revealed that the surface morphologies of resultant metal-carbon xerogels were composed of carbon microspheres with diameters from 5 to 15 mu m. Transmission electron microscopy observations illustrated that Ni-carbon xerogel was made of uniform carbon nanotubes which differed from the approximative core/shell structures of Fe- and Co-carbon xerogels. Measurements on magnetic properties indicated that the Fe-, Co-, and Ni-carbon xerogels exhibited typical ferromagnetic characteristics at room temperature. (C) 2013 Elsevier Ltd. All rights reserved.
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