characterization of cobalt oxide co3o4 nanoparticles prepared by various methods: effect of calcination temperatures on size, dimension and catalytic decomposition of hydrogen peroxide

in this scientific research work we report a novel method to synthesis co3o4 nanoparticles via calcinations of cobalt hydroxide which can be conveniently prepared by the co(no3 )2.6h2o with different reactants. in order to study the effect of calcination temperature on structure and morphology of the nanoparticles, the calcinations take place at various temperatures (at 300°c, 500°c and 700°c). the nature of cobalt oxide species depending on heat treatment. the samples at low temperature show decrease on size and dimension. the characteristics of the nanoparticles were investigated by xrd patterns, ir spectroscopy and scanning electron microscopy (sem). it indicates that at higher temperature, greater nanoparticles were produced. decomposition of h2o2 showed that calcination at 300°c result to higher activity.