Zusammenfassung
Dispersed nickel oxide nanoparticles were obtained by a simple and
low-cost method using a mixture of gelatin as organic precursor and
NiCl(2 center dot)6H(2)O as Ni source. The average particle size was
estimated from X-ray powder diffraction (XRPD) peaks using the Rietveld
refinement. The values ranged from 3.2 to 79 nm. We observed that the
particle size changes as a function of synthesis time, with a notable
decrease after the addition of NaOH to the solution. Field emission
scanning electron microscopy (FE-SEM) measurements show that particles
have well defined shapes and are dispersed in an organic matrix. X-ray
absorption near edge spectroscopy (XANES) shows also the formation of
fcc NiO nanoparticles structures.
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