Preparation of fibrous nickel oxide particles
摘要
The fibrous nickel oxide particles were prepared by chemical precipitation and pyrolysis method. The NiO precursors were firstly precipitated from nickel ions solution with addition of oxalate salt, and then the final NiO particles were obtained by pyrolysis of the precursor. The effects of the pH value, precipitation temperature, reactant concentration, addition of surfactant on the morphology of the precursor particles were investigated. The crystallinity, purity, morphology of the fibrous NiO were analyzed by XRD and SEM. The fibrous NiO particles with 100120 in axis/diameter ratio may be produced under the optimal process conditions that are proposed: the Ni~(2+) concentration is (0.5)0.8 mol/L, pH value is 8.38.9, precipitation temperature is 6075 ℃, pyrolysis temperature is 500600 ℃.