A. E. A. Morsy, M. Rashad*, N. M. Shaalan and M.A. Abdel-Rahim Pages 109 - 114 ( 6 )
Copper oxide (CuO) nanoparticles (NPs) and copper oxide doped with various percentage of nickel (Ni) have been successfully prepared using the solid-solid reaction method. The obtained powders of these CuO NPs have been calcined at various temperatures of 350°C, 450°C, 550°C and 650°C. These NPs have been characterized by Differential Thermal Analysis (DTA), X-Ray diffraction (XRD), Field Emission Scanning Electron Microscope (FESEM) and Fourier Transformation Infrared Spectroscopy (FTIR). XRD results obtained a pure phase of the as-prepared CuO NPs. The average crystallite size determined from XRD increases with certain calcination temperature. Doping of Ni in CuO NPs is extensively studied. The increase of Ni from 0.5% to 10% causes a decrease in the average crystallite size observed in FESEM studies. Moreover, magnetic properties are investigated for as-prepared CuO, CuO calcined at 650°C, and CuO doped 10% Ni. The magnetic observations illustrated that, at the maximum applied field of 1.5 kOe, the magnetic response with a maximum moment M ≤ 0.01 emu/g for CuO NPs is achieved. This could be related to the uncompensated surface spins. Moreover, the magnetic response with a maximum moment is doubled in CuO NPs doped with 10% Ni.
CuO, Ni, X-ray diffraction, FESEM, Magnetic hysteresis loop.
Physics Department, Faculty of Science, Assiut University, Assiut 71516, Physics Department, Faculty of Science, Assiut University, Assiut 71516, Physics Department, Faculty of Science, Assiut University, Assiut 71516, Physics Department, Faculty of Science, Assiut University, Assiut 71516