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Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content

dc.contributor.authorDeus, R.C.
dc.contributor.authorCortés, J.A.
dc.contributor.authorRamirez, M.A.
dc.contributor.authorPonce, Miguel Adolfo
dc.contributor.authorAndres, Juan
dc.contributor.authorRocha, L.S.R.
dc.contributor.authorLongo, Elson
dc.contributor.authorSimões, Alexandre
dc.date.accessioned2016-06-14T06:53:16Z
dc.date.available2016-06-14T06:53:16Z
dc.date.issued2015
dc.identifier.citationDEUS, R. C., et al. Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content. Materials Research Bulletin, 2015, vol. 70, p. 416-423.ca_CA
dc.identifier.issn0025-5408
dc.identifier.urihttp://hdl.handle.net/10234/160670
dc.description.abstractThe structural and photoluminescent properties at room temperature of CeO2 and La-doped CeO2 particles were undertaken. The obtained particles were synthesized by a microwave-assisted hydrothermal method (MAH) under different lanthanum contents. X-ray diffraction (XRD), Fourier transform infrared (FT-IR), Fourier transform Raman (FT-Raman), Ultra-violet spectroscopy (UV–vis) and photoluminescence (PL) measurements were carried out. XRD revealed that the powders are free of secondary phases and crystallize in the cubic structure. Raman data show that increasing La doping content increase oxygen vacancies due to lattice expansion. The UV/vis absorption spectroscopy suggested the presence of intermediate energy levels in the band gap of structurally ordered powders. Lanthanum addition creates oxygen vacancies and shifts the photoluminescence in the low energy range leading to intense PL emission.ca_CA
dc.description.sponsorShipThe financial support of this research project by the Brazilian research funding agencies CNPq 573636/2008-7, INCTMN 2008/57872-1 and FAPESP 2013/07296-2. We would like to thank Professor Elson Longo for facilities.ca_CA
dc.format.extent8 p.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherElsevierca_CA
dc.relation.isPartOfMaterials Research Bulletin, 2015, vol. 70ca_CA
dc.rightsCopyright © Elsevier B.V.ca_CA
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/*
dc.subjectceramicsca_CA
dc.subjectnanostructuresca_CA
dc.subjectcrystal growthca_CA
dc.subjectX-ray diffractionca_CA
dc.subjectluminescenceca_CA
dc.titlePhotoluminescence properties of cerium oxide nanoparticles as a function of lanthanum contentca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttp://dx.doi.org/10.1016/j.materresbull.2015.05.006
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccessca_CA
dc.relation.publisherVersionhttp://www.sciencedirect.com/science/article/pii/S002554081500330Xca_CA
dc.type.versioninfo:eu-repo/semantics/publishedVersionca_CA


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