Cabral, A. C.Cavalcante, L. S.Deus, R. C.Longo, Elson [UNESP]Simões, A. Z.Moura, F.2014-05-272014-05-272013-10-07Ceramics International.0272-8842http://hdl.handle.net/11449/76791The structural and photoluminescent properties at room temperature of CeO2 nanoparticles synthesized by a Microwave-Assisted Hydrothermal Method (MAH) under different praseodymium contents was undertaken. X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), UV-vis Spectroscopy (UV-vis), Fourier Transform Raman (FT-Raman) and Photoluminescence (PL) measurements were employed. XRD revealed that the nanoparticles 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 absorption spectroscopy suggested the presence of intermediate energy levels in the band gap of structurally ordered powders. The most intense PL emission was obtained for nanoparticles which represent a lower particle size. © 2013 Elsevier Ltd and Techna Group S.r.l.engA. CeramicsB. Chemical synthesesB. Powder metallurgyC. X-ray diffractionArtigo10.1016/j.ceramint.2013.08.117WOS:000331017500081Acesso restrito2-s2.0-84884848086