Abstract
Nanocrystalline nickel oxide (NiO) powder was prepared by thermal decomposition of the precursor of NiC 2O 4·2H 2O obtained via the reaction between Ni(NO 3)·6H 2O and H 2C 2O 4·2H 2O in ethanol solvent. The products were characterized using X-ray diffraction, infrared absorption spectroscopy, thermogravimetric analysis_differential thermal analysis, and transmission electron microscopy. The particle sizes of the as-calcined NiO increased with increase in temperature. The as-calcined NiO at 400°C for 1 h was of narrow distribution, weak agglomeration and small particle size (average=8 nm). The reason for weak agglomeration was explained.
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