Synthesis and characterization of Co3O4 prepared from atmospheric pressure acid leach liquors of nickel laterite ores
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第1期
论文作者：Long Meng Zhan-cheng Guo Jing-kui Qu Tao Qi Qiang Guo Gui-hua Hou Peng-yu Dong Xin-guo Xi
文章页码：20 - 27
摘 要：A chemical precipitation–thermal decomposition method was developed to synthesize Co3O4 nanoparticles using cobalt liquor obtained from the atmospheric pressure acid leaching process of nickel laterite ores. The effects of the precursor reaction temperature, the concentration of Co2+, and the calcination temperature on the specific surface area, morphology, and the electrochemical behavior of the obtained Co3O4 particles were investigated. The precursor basic cobaltous carbonate and cobaltosic oxide products were characterized and analyzed by Fourier transform infrared spectroscopy, thermogravimetric differential thermal analysis, X-ray diffraction, field-emission scanning electron microscopy, specific surface area analysis, and electrochemical analysis. The results indicate that the specific surface area of the Co3O4 particles with a diameter of 30 nm, which were obtained under the optimum conditions of a precursor reaction temperature of 30℃, 0.25 mol/L Co2+, and a calcination temperature of 350℃, was 48.89 m2/g. Electrodes fabricated using Co3O4 nanoparticles exhibited good electrochemical properties, with a specific capacitance of 216.3 F/g at a scan rate of 100 mV/s.
Long Meng1,2,3，Zhan-cheng Guo2，Jing-kui Qu1,3，Tao Qi1,3，Qiang Guo1,3,4，Gui-hua Hou5，Peng-yu Dong5，Xin-guo Xi6
1. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences2. State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing3. Key Laboratory of Green Process and Engineering,Institute of Process Engineering,Chinese Academy of Sciences4. Zhengzhou Institute of Emerging Technology Industries5. Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province,Yancheng Institute of Technology6. Jiangsu Collaborative Innovation Center for Ecological Building Materials and Environmental Protection Equipments,Yancheng Institute of Technology
摘 要：A chemical precipitation–thermal decomposition method was developed to synthesize Co3O4 nanoparticles using cobalt liquor obtained from the atmospheric pressure acid leaching process of nickel laterite ores. The effects of the precursor reaction temperature, the concentration of Co2+, and the calcination temperature on the specific surface area, morphology, and the electrochemical behavior of the obtained Co3O4 particles were investigated. The precursor basic cobaltous carbonate and cobaltosic oxide products were characterized and analyzed by Fourier transform infrared spectroscopy, thermogravimetric differential thermal analysis, X-ray diffraction, field-emission scanning electron microscopy, specific surface area analysis, and electrochemical analysis. The results indicate that the specific surface area of the Co3O4 particles with a diameter of 30 nm, which were obtained under the optimum conditions of a precursor reaction temperature of 30℃, 0.25 mol/L Co2+, and a calcination temperature of 350℃, was 48.89 m2/g. Electrodes fabricated using Co3O4 nanoparticles exhibited good electrochemical properties, with a specific capacitance of 216.3 F/g at a scan rate of 100 mV/s.
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