Comparative Structural and Optical Properties of Different Ceria Nanoparticles
Bozanic, D. K.
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Herein a comparative study of five nanocrystalline cerium oxides (CeO2-delta) synthesised by different methods and calcined at 500 degrees C is reported. XRPD analysis showed that stoichiometry parameter delta, crystallite size/strain and lattice constant were only slightly affected by the method utilized. All ceria nanoparticles are nearly spherical in shape with faceted morphology, free of defects and with a relatively uniform size distribution. The average microstrain was found to be approximately 10 times higher than that of bulk counterpart. The absorption edge of nanocrystalline materials was shifted towards a higher wavelengths (red shift) in comparison with bulk counterpart, and band gap values were in the range 2.7-3.24 eV (3.33 eV for bulk counterpart).
Кључне речи:Ceria / Nanoparticles / Synthesis / Structure / Microstructure / Spectroscopy
Извор:Journal of Nanoscience and Nanotechnology, 2013, 13, 10, 6787-6792
- Amer Scientific Publishers, Valencia