Abstract
Nanocrystalline particles of Cerium Oxide (CeO2) have been prepared by the chemical precipitation method using Cerium nitrate and Urea with a molar ratio of 1:2. The results revealed that the formation of CeO2 fine particles is influenced by molar ratio of metal nitrates to fuel. Well faceted CeO2 nanoparticles, were synthesized by thermal-assisted dissociation method at reflux temperature in a short period of time. A possible mechanism for synthesis of such highly pure and stable nanoparticles is tentatively proposed by thermogravimetry-differential thermal analysis (TG –DTA) study. The powders were investigated by X-ray diffraction (XRD), Transmission electron microscopy (TEM), selected area electron diffraction (SAED), high resolution transmission electron microscopy (HRTEM). In addition, uniform particles, size distribution and purity of samples are highly dependent on the applied chemical precipitation method. Raman spectroscopy and Electron Diffraction Analysis confirmed the fluorite structure of bulk CeO2.
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