Characterization of Magnetic Properties of CoPd Alloy Nanoparticles Synthesized via a Novel Sol-Gel Process
XU Lianqiang1,2, TANG Zhixiong2, TANG Shaolong2, DU Youwei2
1 School of Physics and Electronic Information Engineering, Engineering Research Center of Nanostructure and Functional Materials, Ningxia Normal University, Guyuan 756000; 2 Jiangsu Key Laboratory for Nanotechnology, Collaborative Innovation Center of Advanced Microstructures, Nanjing National Laboratory of Microstructures, School of Physics, Nanjing University, Nanjing 210093
Abstract: The present work improved a novel sol-gel process, and made a successful attempt to prepare CoPd alloy nanoparticles by means of this facile one-pot reaction without H2 reduction. The formation of face-centered cubic (fcc) CoPd nanoalloy nano-particles were confirmed by the examinations of X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). The analyses show that the grain sizes of the synthesized nanoparticles range from 4 nm to 12 nm with average about 9 nm, and the synthesized nanoparticles exhibit typical superparamagnetic behavior at 300 K along with a blocking temperature at 250 K. This novel silica sol-gel strategy is expected to display potential application in preparing other nanoalloy nanoparticles.
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2018, Vol. 32 
