Abstract
Dispersed nickel oxide nanoparticles were obtained by a simple and low-cost method using a mixture of gelatin as organic precursor and NiCl2 · 6H2O 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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Acknowledgements
This work was supported by the Brazilian funding agencies: CNPq (project 470939/2003-6), FUNCAP and CAPES. The authors would like to thank the Laboratory of Electron Microscopy at Laboratório Nacional de Luz Síncrotron (LNLS) for the SEM measurements and Gelita for supplying the gelatin.
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Meneses, C., Flores, W., Garcia, F. et al. A simple route to the synthesis of high-quality NiO nanoparticles . J Nanopart Res 9, 501–505 (2007). https://doi.org/10.1007/s11051-006-9109-2
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DOI: https://doi.org/10.1007/s11051-006-9109-2