摘要
以Ni(NO3)2和(NH4)2CO3为原料,在水溶液中反应得Ni2(OH)2CO3前驱体,前驱体经400℃热解可得平均粒径为20.3nm无团聚的纳米NiO粉体。经XRD分析可知无Ni、Ni2O3等衍射峰存在,同时将实验结果与乙醇溶液中草酸盐沉淀法及水溶液中NH4HCO3作沉淀剂所得产物进行了比较,并分析了水溶液中(NH4)2CO3沉淀法的优点。
Nano-NiO powder was prepared by thermal decomposition of the precursor of Ni2(OH)2CO3 obtained via chemical reaction between Ni(NO3)2 and (NH4)2CO3 in water solvent. Experiment results showed that the NiO particles were non-agglomerated and well dispersed with the average size of 20.3 nm. In addition, there were no diffraction peaks of Ni and Ni2O3 from XRD measurements. Compared with oxalate precipitation method in ethanol solvent or NH4HCO3 precipitation method in water solvent, it was found that (NH4)2CO3 precipitation method in water solvent had many advantages, and the mechanisms were also discussed.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2005年第6期906-907,共2页
Journal of Functional Materials
基金
国家自然科学基金资助项目(50372028)
关键词
氧化镍
纳米晶
沉淀
热解
Chemical reactions
Crystal structure
Decomposition
Dispersions
Nickel compounds
Oxides
Precipitation (chemical)
Transmission electron microscopy
X ray powder diffraction
