Abstract:
In order to study the roles of the crystallite size of an active phase in a catalytic reaction it is of utmost importance to be able to synthesize pure phases of crystallite in the desired size range with a narrow size distribution. The method to produce a nano of Nickel oxide (NiO ) is described. Nanoparticles (NPs) of NiO are prepared by thermal decomposition of freshly prepared nickel hydroxide by a sol gel route at〖 300〗^° C.This sample is characterized by X-ray diffractometer (XRD) and UV–visible spectroscopy. The average crystalline space or the separation between atomic planes of (NiO) NPs is found to be about (2 - 5nm) and the average of particle size is (9- 19 nm). According to our X-ray and neutron diffraction data, all NiO powders are antiferromagnetically ordered at room temperature.
