Preparation and characteristics of nanocrystalline NiO by organic solvent method

Nanocrystalline nickel oxide (NiO) powder was prepared by thermal decomposi tion of the precursor of NiC2O4. 2H(2)O obtained via the reaction between N i(NO3). 6H(2)O and H2C2O4. 2H(2)O in ethanol solvent. The products were cha racterized using X-ray diffraction, infrared absorption spectroscopy, therm ogravimetric analysis-differential thermal analysis, and transmission elect ron microscopy. The particle sizes of the as-calcined NiO increased with in crease in temperature. The as-calcined NiO at 400 degreesC for 1 h was of n arrow distribution, weak agglomeration and small particle size (average = 8 nm). The reason for weak agglomeration was explained. (C) 2001 Elsevier Sc ience B.V. All rights reserved.