Synthesis and characterisation of Ni-doped Fe₃O₄/polypyrrole magnetic and conducting nanocomposites with core–shell structure

Authors: Ma, J.¹; Ji, Y.²; Shen, X.²

Source: Materials Science and Technology, Volume 25, Number 10, October 2009 , pp. 1279-1282(4)

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Abstract:

Electrical and magnetic function materials have many potential applications. A magnetic and conducting Ni-doped Fe₃O₄/polypyrrole (PPy) nanocomposite with a core–shell structure was prepared by in situ polymerisation of a pyrrole monomer in an aqueous solution containing a dispersion of Ni-doped Fe₃O₄ nanoparticles. The structure and properties of Ni-doped Fe₃O₄/PPy nanocomposites were characterised by X-ray diffraction (XRD), TEM, infrared spectrometry (IR), vibrating sample magnetometry (VSM) and thermogravimetry (TG). The results showed that the Ni-doped Fe₃O₄ nanoparticles were completely coated by polypyrrole; the resultant Ni-doped Fe₃O₄/PPy nanocomposites exhibited a good superparamagnetic behaviour and the saturation magnetisation was as high as 25�2 emu g⁻¹ owing to the adoption of Ni-doped Fe₃O₄ as the magnetic source. In addition, the influences of Ni-doped Fe₃O₄ content on the electromagnetic properties of resultant nanocomposites were preliminarily investigated.

Keywords: NANOCOMPOSITE; MAGNETISATION; CORE SHELL; POLYPYRROLE; CONDUCTIVITY; NI-DOPED FE3O4

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174328408X378898

Affiliations: 1: College of Materials Science and Engineering, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 200051, China; Zhongyuan University of Technology, Zhengzhou 450007, China 2: College of Materials Science and Engineering, State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 200051, China

Publication date: 2009-10-01

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