were obtained. The factors that influence the physical property of NiO nanoparticles were
investigated mainly through the use of SEM, BET and XRD. It revealed that calcination
temperature of the precursor and the pH value of the solution significantly affected the
particle size and surface area of the synthesized nanosized NiO powders. The ratio of citric
acid to nickel nitrate and the heating rate of calcinations were also important to the physical …