Synthesis and characterizations of Nickel oxide nanoparticles by PVA matrix method

NiO nanoparticles were prepared by PVA matrix method with an average grain size of 25–75 nm. The prepared NiO naoparticles were characterized by XRD (X-ray diffraction), XRF (X-ray florescence), TEM (Transmission Electron Microscopy), FT-IR Spectroscopy and VSM. It is found that, calcination temperature effects widely on the grain size and other properties of NiO nanocrystals. The magnetic properties of these particles show significant variation such as increase in saturation magnetization, coercivity etc. with rise in calcination temperatures. But the band gap of the NiO nanoparticles decreases with the increase in calcinations temperatures.