Preparation of fibrous nickel oxide particles
(1. School of Metallurgical Science and Engineering,
Central South University,Changsha 410083, China;
2.Center for Intergrated Research in Science and Engineering, Nagoya University,
Furo-Cho, Chikusa-Ku, Nagoya 464-8603, Japan)
Central South University,Changsha 410083, China;
2.Center for Intergrated Research in Science and Engineering, Nagoya University,
Furo-Cho, Chikusa-Ku, Nagoya 464-8603, Japan)
Abstract: 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 100-120 in axis/diameter ratio may be produced under the optimal process conditions that are proposed: the Ni2+ concentration is 0.5-0.8mol/L, pH value is 8.3-8.9, precipitation temperature is 60-75℃, pyrolysis temperature is 500-600℃.
Key words: chemical precipitation and pyrolysis； precursor； fibrous NiO particles； preparation