Journal
CERAMICS INTERNATIONAL
Volume 40, Issue 3, Pages 4445-4453Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.08.117
Keywords
Ceramics; Chemical syntheses; Powder metallurgy; X-ray diffraction
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Funding
- CNPq
- FAPESP
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The structure and photoluminescence (PL) properties of CeO2 nanocrystals synthesized by the microwave-assisted hydrothermal (MAH) method with different praseodymium (Pr3+) ions contents were performed. X-ray diffraction (XRD), transmission electron microscopy (TEM), diffuse reflectance ultraviolet-visible (UV-vis), Fourier transform Raman (FT-Raman) spectroscopies and PL measurements at room temperature were employed. XRD patterns indicated that the nanocrystals are free of secondary phases and crystallize in the cubic structure while FT-Raman revealed a typical scattering mode of fluorite type. The UV-vis spectra suggested the presence of intermediate energy levels in the band gap of these nanocrystals. The most intense PL emission was obtained for CeO2 nanocrystals doped with 1.6% of Pr3+ ions and smaller particle size. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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