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A facile method to fabricate carbon-encapsulated Fe3O4 core/shell composites

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Published 3 January 2007 • IOP Publishing Ltd
, , Citation Shouhu Xuan et al 2007 Nanotechnology 18 035602 DOI 10.1088/0957-4484/18/3/035602

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1 State Key Laboratory of Fire Science, The University of Science and Technology of China (USTC), Hefei, Anhui 230026, People's Republic of China

2 Department of Chemistry, USTC, Hefei 230026, People's Republic of China

3 CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Mechanics and Mechanical Engineering, USTC, Hefei 230026, People's Republic of China

4 Author to whom any correspondence should be addressed

Dates

  1. Received 28 August 2006
  2. Published

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0957-4484/18/3/035602

Abstract

One-step synthesis of carbon-encapsulated Fe3O4 core/shell composites is reported. The Fe3O4 cores were formed via the reduction of Fe3+ by glucose under alkaline conditions obtained by the decomposition of urea. The amorphous carbon shells were carbonized from glucose. A possible formation mechanism for the Fe3O4@C composite was discussed. In order to characterize these Fe3O4@C core–shell composites, high-resolution transmission electron microscopy (HR-TEM), x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), x-ray photoelectron spectroscopy (XPS) and a superconducting quantum interference device (SQUID) magnetometer were employed to characterize the sample obtained using the above method.

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10.1088/0957-4484/18/3/035602