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

Detalhes bibliográficos
Autor(a) principal: Deus, R. C. [UNESP]
Data de Publicação: 2015
Outros Autores: Cortés, J. A. [UNESP], Ramirez, M. A. [UNESP], Ponce, M. A., Andres, J. [UNESP], Rocha, L. S.R. [UNESP], Longo, E. [UNESP], Simões, A. Z. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.materresbull.2015.05.006
http://hdl.handle.net/11449/177343
Resumo: Abstract 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.
id UNSP_d3d28bbb434b9fba15507fb8a65a9d17
oai_identifier_str oai:repositorio.unesp.br:11449/177343
network_acronym_str UNSP
network_name_str Repositório Institucional da UNESP
repository_id_str 2946
spelling Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum contentCeramicsCrystal growthLuminescenceNanostructuresX-ray diffractionAbstract 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.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade Estadual Paulista, Unesp, Faculdade de Engenharia de Guaratinguetá, Av. Dr Ariberto Pereira da Cunha 333, Bairro Pedregulho P.O. Box 355Laboratório Interdisciplinar em Cerâmica, Instituto de Química, Universidade Estadual Paulista, P.O. Box 355Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET-Universidad Nacional de Mar del Plata, Juan B. Justo 4302Universidade Estadual Paulista, Unesp, Faculdade de Engenharia de Guaratinguetá, Av. Dr Ariberto Pereira da Cunha 333, Bairro Pedregulho P.O. Box 355Laboratório Interdisciplinar em Cerâmica, Instituto de Química, Universidade Estadual Paulista, P.O. Box 355FAPESP: 2013/07296-2FAPESP: 573636/2008-7Universidade Estadual Paulista (Unesp)Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET-Universidad Nacional de Mar del PlataDeus, R. C. [UNESP]Cortés, J. A. [UNESP]Ramirez, M. A. [UNESP]Ponce, M. A.Andres, J. [UNESP]Rocha, L. S.R. [UNESP]Longo, E. [UNESP]Simões, A. Z. [UNESP]2018-12-11T17:25:02Z2018-12-11T17:25:02Z2015-10-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article416-423application/pdfhttp://dx.doi.org/10.1016/j.materresbull.2015.05.006Materials Research Bulletin, v. 70, p. 416-423.0025-5408http://hdl.handle.net/11449/17734310.1016/j.materresbull.2015.05.0062-s2.0-849291506152-s2.0-84929150615.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Research Bulletin0,746info:eu-repo/semantics/openAccess2024-07-02T15:04:05Zoai:repositorio.unesp.br:11449/177343Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:45:47.194195Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content
title Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content
spellingShingle Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content
Deus, R. C. [UNESP]
Ceramics
Crystal growth
Luminescence
Nanostructures
X-ray diffraction
title_short Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content
title_full Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content
title_fullStr Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content
title_full_unstemmed Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content
title_sort Photoluminescence properties of cerium oxide nanoparticles as a function of lanthanum content
author Deus, R. C. [UNESP]
author_facet Deus, R. C. [UNESP]
Cortés, J. A. [UNESP]
Ramirez, M. A. [UNESP]
Ponce, M. A.
Andres, J. [UNESP]
Rocha, L. S.R. [UNESP]
Longo, E. [UNESP]
Simões, A. Z. [UNESP]
author_role author
author2 Cortés, J. A. [UNESP]
Ramirez, M. A. [UNESP]
Ponce, M. A.
Andres, J. [UNESP]
Rocha, L. S.R. [UNESP]
Longo, E. [UNESP]
Simões, A. Z. [UNESP]
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), CONICET-Universidad Nacional de Mar del Plata
dc.contributor.author.fl_str_mv Deus, R. C. [UNESP]
Cortés, J. A. [UNESP]
Ramirez, M. A. [UNESP]
Ponce, M. A.
Andres, J. [UNESP]
Rocha, L. S.R. [UNESP]
Longo, E. [UNESP]
Simões, A. Z. [UNESP]
dc.subject.por.fl_str_mv Ceramics
Crystal growth
Luminescence
Nanostructures
X-ray diffraction
topic Ceramics
Crystal growth
Luminescence
Nanostructures
X-ray diffraction
description Abstract 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.
publishDate 2015
dc.date.none.fl_str_mv 2015-10-01
2018-12-11T17:25:02Z
2018-12-11T17:25:02Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1016/j.materresbull.2015.05.006
Materials Research Bulletin, v. 70, p. 416-423.
0025-5408
http://hdl.handle.net/11449/177343
10.1016/j.materresbull.2015.05.006
2-s2.0-84929150615
2-s2.0-84929150615.pdf
url http://dx.doi.org/10.1016/j.materresbull.2015.05.006
http://hdl.handle.net/11449/177343
identifier_str_mv Materials Research Bulletin, v. 70, p. 416-423.
0025-5408
10.1016/j.materresbull.2015.05.006
2-s2.0-84929150615
2-s2.0-84929150615.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Materials Research Bulletin
0,746
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 416-423
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808129243494744064

Registros relacionados