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Journal of Nanomaterials
Volume 2017, Article ID 7868121, 15 pages
Research Article

Preparation of N-Doped Composite Shell Encapsulated Iron Nanoparticles and Their Magnetic, Adsorptive, and Photocatalytic Properties

1Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China
2Center of Analysis, Tianjin University, Tianjin 300072, China
3Department of Catalysis, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

Correspondence should be addressed to Shen Cui; nc.ude.ujt@nehsiuc

Received 23 July 2016; Revised 28 December 2016; Accepted 5 January 2017; Published 20 February 2017

Academic Editor: Pedro D. Vaz

Copyright © 2017 Caijing Shi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The N-doped composite shell encapsulated iron nanoparticles (CSEINPs) were prepared by DC arc discharge under nitrogen at 800°C, using the anode with high Fe content and good homogeneity. The morphology, microstructure, composition, and some properties of the N-doped CSEINPs were characterized by various characterization techniques. The results revealed that the shells of the N-doped CSEINPs were composed of homogeneously amorphous structure containing C, Fe, O, and N elements; the saturation magnetization (Ms) and coercivity (Hc) of them at room temperature were 130 emu/g and 194 Oe, respectively. Due to the surface structure and the electrostatic interaction, the N-doped CSEINPs are employed to remove methylene blue (MB) from the waste solution, and they exhibited high adsorption properties and photocatalytic activity under irradiation of visible light (IVL). The kinetics of adsorption of MB on the N-doped CSEINPs was investigated and the recycling test was carried out. The formation mechanism of the N-doped CSEINPs is discussed briefly.