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Published on: March 2, 2016
Synthesis and characterization of Fe/Nd2O3 core-shell nanoparticles by hydrogen plasma-metal reaction
Tong Liu1, Shicheng Zhang, Xingguo Li
1The State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing 100871, P R China.
Abstract:
Fe/Nd2O3 core-shell nanoparticles (CSNs) with a mean diameter of 35 nm were produced successfully by using hydrogen plasma-metal reaction (HPMR) method. This core-shell structure was confirmed by high resolution transmission electron microscopy (HRTEM), energy dispersion X-ray spectroscopy (EDS), X-ray photoelectron spectral (XPS), and induction-coupled plasma (ICP) spectroscopy. The magnetic properties were measured by vibrating sample magnetometer (VSM). It was found that the mole ratio of Nd to Fe on the nanoparticle surface is 1.2:1, about 7 times of that of the whole nanoparticle. The saturation magnetization Ms and remanence Mr of Fe/Nd2O3 nanoparticles decrease prominently from Fe nanoparticles, whereas the coercivity Hc drops only less than 5% of Fe nanoparticle. These CSNs have potential applications in magnetic and catalytic fields.
