Eutectic assisted synthesis of nanocrystalline NiO through chemical precipitation

摘要

Cubic NiO nanocrystallites with the particle size of 15-20 nm were successfully prepared through the decomposition of the precursor and eutectic as the assistant. The precursor was obtained by precipitating Ni(NO_3)_2·6H_2O with NaOH in a water solvent. The compared experiments were carried out either with the presence or absence of eutectic. It was indicated by X-ray diffraction (XRD) and transmission electron microscopy (TEM) analysis that the eutectic played an important part in overcoming the agglomerations and the prepared NiO nanocrystallites have better morphology and uniform granularity. The mechanism of eutectic during the synthesis of nanocrystalline NiO was also discussed.