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

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dc.contributor.authorDeus, R. C. [UNESP]
dc.contributor.authorCortés, J. A. [UNESP]
dc.contributor.authorRamirez, M. A. [UNESP]
dc.contributor.authorPonce, M. A.
dc.contributor.authorAndres, J. [UNESP]
dc.contributor.authorRocha, L. S.R. [UNESP]
dc.contributor.authorLongo, E. [UNESP]
dc.contributor.authorSimões, A. Z. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionInstituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET-Universidad Nacional de Mar del Plata
dc.date.accessioned2018-12-11T17:25:02Z
dc.date.available2018-12-11T17:25:02Z
dc.date.issued2015-10-01
dc.description.abstractAbstract The structural and photoluminescent properties at room temperature of CeO<inf>2</inf> and La-doped CeO<inf>2</inf> 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.en
dc.description.affiliationUniversidade Estadual Paulista, Unesp, Faculdade de Engenharia de Guaratinguetá, Av. Dr Ariberto Pereira da Cunha 333, Bairro Pedregulho P.O. Box 355
dc.description.affiliationLaboratório Interdisciplinar em Cerâmica, Instituto de Química, Universidade Estadual Paulista, P.O. Box 355
dc.description.affiliationInstituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET-Universidad Nacional de Mar del Plata, Juan B. Justo 4302
dc.description.affiliationUnespUniversidade Estadual Paulista, Unesp, Faculdade de Engenharia de Guaratinguetá, Av. Dr Ariberto Pereira da Cunha 333, Bairro Pedregulho P.O. Box 355
dc.description.affiliationUnespLaboratório Interdisciplinar em Cerâmica, Instituto de Química, Universidade Estadual Paulista, P.O. Box 355
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2013/07296-2
dc.description.sponsorshipIdFAPESP: 573636/2008-7
dc.format.extent416-423
dc.identifierhttp://dx.doi.org/10.1016/j.materresbull.2015.05.006
dc.identifier.citationMaterials Research Bulletin, v. 70, p. 416-423.
dc.identifier.doi10.1016/j.materresbull.2015.05.006
dc.identifier.file2-s2.0-84929150615.pdf
dc.identifier.issn0025-5408
dc.identifier.scopus2-s2.0-84929150615
dc.identifier.urihttp://hdl.handle.net/11449/177343
dc.language.isoeng
dc.relation.ispartofMaterials Research Bulletin
dc.relation.ispartofsjr0,746
dc.rights.accessRightsAcesso abertopt
dc.sourceScopus
dc.subjectCeramics
dc.subjectCrystal growth
dc.subjectLuminescence
dc.subjectNanostructures
dc.subjectX-ray diffraction
dc.titlePhotoluminescence properties of cerium oxide nanoparticles as a function of lanthanum contenten
dc.typeArtigopt
dspace.entity.typePublication
relation.isDepartmentOfPublication98822fa1-e1e3-4ac2-a1d2-37a24b20db56
relation.isDepartmentOfPublication.latestForDiscovery98822fa1-e1e3-4ac2-a1d2-37a24b20db56
relation.isOrgUnitOfPublicationbc74a1ce-4c4c-4dad-8378-83962d76c4fd
relation.isOrgUnitOfPublication.latestForDiscoverybc74a1ce-4c4c-4dad-8378-83962d76c4fd
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentMateriais e Tecnologia - FEGpt
unesp.departmentBioquímica e Tecnologia - IQpt

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Araraquara - IQAR - Instituto de Química
Guaratinguetá - FEG - Faculdade de Engenharia e Ciências