EDUARDO CAETANO CAMILO DE SOUZA
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Resumo IPEN-doc 16180 Effect of solvent on surface structure characteristics of chemically synthesized samaria-doped ceria nanoparticles2010 - SOUZA, E.C.C.; REY, J.F.Q.; MUCCILLO, E.N.S.Artigo IPEN-doc 14482 Optical and electrical characterization of samaria-doped ceria2010 - SOUZA, E.C.C.; BRITO, H.F.; MUCCILLO, E.N.S.Ce0.8Sm0.2O1.9 andCeO2 nanomaterials were prepared by a solution technique to produce an ultrafine particulate material with high sinterability. In this work, the structural characteristics, the photoluminescent behavior and the ionic conductivity of the synthesized materials are focused. The thermally decomposed material consists of less than 10 nm in diameter nanoparticles. The Raman spectrum of pure CeO2 consists of a single triple degenerate F2g model characteristic of the fluorite-like structure. The full width at half maximum of this band decreases linearly with increasing calcination temperature. The photoluminescence spectra show a broadened emission band assigned to the ligand-to-metal charge-transfer states O→Ce4+. The emission spectra of the Ce0.8Sm0.2O1.9 specimens present narrow bands arising from the 4G5/2 →6HJ transitions (J=5/2, 7/2, 9/2 and 11/2) of Sm3+ ion due to the efficient energy transfer from the O→Ce4+ transitions to the emitter 4G5/2 level. The ionic conductivity of sintered specimens shows a significant dependence on density.Artigo IPEN-doc 16251 Properties and applications of Perovskite proton conductors2010 - SOUZA, EDUARDO C.C. de; MUCCILLO, REGINALDOArtigo IPEN-doc 17257 Solid solution formation, densification and ionic conductivity of Gd- and Sm-doped ceria2011 - REIS, S.L.; SOUZA, E.C.C.; MUCCILLO, E.N.S.Artigo IPEN-doc 17733 Influence of neodymium ions on photocatalytic activity of TiOsub(2) synthesized by sol-gel and precipitation methods2011 - HEWER, T.L.R.; SOUZA, E.C.C.; MARTINS, T.S.; MUCCILLO, E.N.S.; FREIRE, R.S.Artigo IPEN-doc 18086 Ionic and electronic conductivity of nanostructured, samaria-doped ceria2012 - SOUZA, E.C.C.; CHUEH, W.C.; JUNG, W.; MUCCILLO, E.N.S.; HAILE, S.M.