Regulation of synthesis process of basic nickel carbonate and study on preparation of spherical nickel oxides through calcination
CHEN Yan-guang1,2, YU Jia-meng1,2, ZHANG Ya-nan1,2, XU Rui-han1,2, DENG Ji-tong1,2, HAN Hong-jing1,2
1. School of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China; 2. Heilongjiang Provincial Key Laboratory of Oil and Gas Chemical Technology, Daqing 163318, China
Abstract: It is an effective way to synthesize morphological adjustable metal oxides from precursors.Basic nickel carbonate precursor is prepared by hydrothermal synthesis.Spherical nickel oxide with high specific surface area is obtained via calcination of basic nickel carbonate.The rules to regulate crystal form,particle size and morphology of basic nickel carbonate are explored.Thermal properties and calcination mechanism of basic nickel carbonate precursor are studied,and the pore size and specific surface area of spherical nickel oxides are measured.Results indicate that the process parameters for the synthesis of spherical basic nickel carbonate are as follows:T=100℃,t=10 h,pH=8,n(Ni(NO3)2):n(CO(NH2)2)=1:2.The addition of co-solvent is helpful to adjust the morphology and dispersion of spherical basic nickel carbonate.In the 20 mL solution with an ethanol volume fraction of 50%,the prepared spherical basic nickel carbonate exhibits uniform in structure with a particle size of 5 μm.Thermogravimetric experiment results show that the prepared basic nickel carbonate decomposes completely at 500℃.Its optimal calcination parameters include T=500℃ and t=1 h,under which the obtained NiO shows a cubic crystalline phase,uniformly dispersed sphere with a particle size of 5 μm,and its specific surface area and pore size are 81.92 m2·g-1 and 30.18 nm.Compared with common nickel oxide,its specific surface area and pore volume increases by 1 times and 2.5 times as its pore size remains basically unchanged.
陈彦广, 于加蒙, 张亚男, 徐瑞晗, 邓冀童, 韩洪晶. 碱式碳酸镍前驱体合成过程调控及其焙烧制球形氧化镍的研究[J]. 现代化工, 2020, 40(6): 83-88.
CHEN Yan-guang, YU Jia-meng, ZHANG Ya-nan, XU Rui-han, DENG Ji-tong, HAN Hong-jing. Regulation of synthesis process of basic nickel carbonate and study on preparation of spherical nickel oxides through calcination. Modern Chemical Industry, 2020, 40(6): 83-88.
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