Synthesis, characterization and evaluation of scintillation properties of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> obtained using PEG as precursor
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jallcom.2015.06.239 http://hdl.handle.net/11449/167915 |
Resumo: | Abstract This work reports on the synthesis of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> using PEG as an organic molecular precursor with 1, 3, 5, 7 e 10 mol% of Eu<sup>3+</sup>. TGA and DTA analysis of the precursors obtained shows that the final materials are obtained at thermal treatment above 700 °C. Based on this information all materials were obtained after heat treatment at 900, 1000 and 1100 °C during 4 h in an oven under air atmosphere. XRD analysis showed that the materials obtained after heat-treatment presents a cubic crystalline structure assigned to the Gd<inf>2</inf>O<inf>3</inf>. Crystallite size and microstrain were evaluated using the Scherrer's equation and Williansom-Hall method, respectively, as a function of heat-treated temperature and Eu<sup>3+</sup> concentration. Raman spectroscopy also showed the formation of the Gd<inf>2</inf>O<inf>3</inf> phase, however, the absence of bands around 117 cm<sup>-1</sup> in the spectra with higher Eu<sup>3+</sup> concentration indicates that the insertion of this one in the host matrix promotes the breakdown of some chemical bonds of the matrix. Intense photoluminescence emission in the visible region with maximum localized around 611 nm under excitation at 255 nm with xenon lamp and with X-ray source were observed. The emissions observed were attributed to the intraconfigurational f-f transitions of Eu<sup>3+</sup>. The lifetime values of the <sup>5</sup>D<inf>0</inf> excited state were between 2.84 and 2.89 ms, indicating the location of Eu<sup>3+</sup> in crystalline systems. This result demonstrates the potential application of the materials in systems for absorption in the ultraviolet region, solar cells, devices generated images and scintillation systems. |
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Synthesis, characterization and evaluation of scintillation properties of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> obtained using PEG as precursorGadolinium oxidePhotoluminescencePolyethyleneglycolRare earthScintillatorAbstract This work reports on the synthesis of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> using PEG as an organic molecular precursor with 1, 3, 5, 7 e 10 mol% of Eu<sup>3+</sup>. TGA and DTA analysis of the precursors obtained shows that the final materials are obtained at thermal treatment above 700 °C. Based on this information all materials were obtained after heat treatment at 900, 1000 and 1100 °C during 4 h in an oven under air atmosphere. XRD analysis showed that the materials obtained after heat-treatment presents a cubic crystalline structure assigned to the Gd<inf>2</inf>O<inf>3</inf>. Crystallite size and microstrain were evaluated using the Scherrer's equation and Williansom-Hall method, respectively, as a function of heat-treated temperature and Eu<sup>3+</sup> concentration. Raman spectroscopy also showed the formation of the Gd<inf>2</inf>O<inf>3</inf> phase, however, the absence of bands around 117 cm<sup>-1</sup> in the spectra with higher Eu<sup>3+</sup> concentration indicates that the insertion of this one in the host matrix promotes the breakdown of some chemical bonds of the matrix. Intense photoluminescence emission in the visible region with maximum localized around 611 nm under excitation at 255 nm with xenon lamp and with X-ray source were observed. The emissions observed were attributed to the intraconfigurational f-f transitions of Eu<sup>3+</sup>. The lifetime values of the <sup>5</sup>D<inf>0</inf> excited state were between 2.84 and 2.89 ms, indicating the location of Eu<sup>3+</sup> in crystalline systems. This result demonstrates the potential application of the materials in systems for absorption in the ultraviolet region, solar cells, devices generated images and scintillation systems.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Grupo de Pesquisa em Química de Materiais - (GPQM), Departamento de Ciências Naturais, Universidade Federal de São João Del Rei, Campus Dom Bosco, Praça Dom Helvécio, 74Instituto de Química, UNESP, P.O. Box 355Instituto de Química, UNESP, P.O. Box 355Grupo de Pesquisa em Química de Materiais - (GPQM), Departamento de Ciências Naturais, Universidade Federal de São João Del Rei, Campus Dom BoscoUniversidade Estadual Paulista (Unesp)Durante, Lorena P.B.Rocha, Leonardo A.Dos Santos, Daniela P.Coelho, Fernando O.Schiavon, Marco A.Ribeiro, Sidney José L. [UNESP]Ferrari, Jefferson L.2018-12-11T16:38:51Z2018-12-11T16:38:51Z2015-07-14info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article467-473application/pdfhttp://dx.doi.org/10.1016/j.jallcom.2015.06.239Journal of Alloys and Compounds, v. 648, p. 467-473.0925-8388http://hdl.handle.net/11449/16791510.1016/j.jallcom.2015.06.2392-s2.0-849375611862-s2.0-84937561186.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Alloys and Compounds1,020info:eu-repo/semantics/openAccess2024-01-11T06:27:32Zoai:repositorio.unesp.br:11449/167915Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:41:08.409351Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Synthesis, characterization and evaluation of scintillation properties of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> obtained using PEG as precursor |
title |
Synthesis, characterization and evaluation of scintillation properties of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> obtained using PEG as precursor |
spellingShingle |
Synthesis, characterization and evaluation of scintillation properties of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> obtained using PEG as precursor Durante, Lorena P.B. Gadolinium oxide Photoluminescence Polyethyleneglycol Rare earth Scintillator |
title_short |
Synthesis, characterization and evaluation of scintillation properties of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> obtained using PEG as precursor |
title_full |
Synthesis, characterization and evaluation of scintillation properties of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> obtained using PEG as precursor |
title_fullStr |
Synthesis, characterization and evaluation of scintillation properties of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> obtained using PEG as precursor |
title_full_unstemmed |
Synthesis, characterization and evaluation of scintillation properties of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> obtained using PEG as precursor |
title_sort |
Synthesis, characterization and evaluation of scintillation properties of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> obtained using PEG as precursor |
author |
Durante, Lorena P.B. |
author_facet |
Durante, Lorena P.B. Rocha, Leonardo A. Dos Santos, Daniela P. Coelho, Fernando O. Schiavon, Marco A. Ribeiro, Sidney José L. [UNESP] Ferrari, Jefferson L. |
author_role |
author |
author2 |
Rocha, Leonardo A. Dos Santos, Daniela P. Coelho, Fernando O. Schiavon, Marco A. Ribeiro, Sidney José L. [UNESP] Ferrari, Jefferson L. |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Grupo de Pesquisa em Química de Materiais - (GPQM), Departamento de Ciências Naturais, Universidade Federal de São João Del Rei, Campus Dom Bosco Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Durante, Lorena P.B. Rocha, Leonardo A. Dos Santos, Daniela P. Coelho, Fernando O. Schiavon, Marco A. Ribeiro, Sidney José L. [UNESP] Ferrari, Jefferson L. |
dc.subject.por.fl_str_mv |
Gadolinium oxide Photoluminescence Polyethyleneglycol Rare earth Scintillator |
topic |
Gadolinium oxide Photoluminescence Polyethyleneglycol Rare earth Scintillator |
description |
Abstract This work reports on the synthesis of Eu<sup>3+</sup>-doped Gd<inf>2</inf>O<inf>3</inf> using PEG as an organic molecular precursor with 1, 3, 5, 7 e 10 mol% of Eu<sup>3+</sup>. TGA and DTA analysis of the precursors obtained shows that the final materials are obtained at thermal treatment above 700 °C. Based on this information all materials were obtained after heat treatment at 900, 1000 and 1100 °C during 4 h in an oven under air atmosphere. XRD analysis showed that the materials obtained after heat-treatment presents a cubic crystalline structure assigned to the Gd<inf>2</inf>O<inf>3</inf>. Crystallite size and microstrain were evaluated using the Scherrer's equation and Williansom-Hall method, respectively, as a function of heat-treated temperature and Eu<sup>3+</sup> concentration. Raman spectroscopy also showed the formation of the Gd<inf>2</inf>O<inf>3</inf> phase, however, the absence of bands around 117 cm<sup>-1</sup> in the spectra with higher Eu<sup>3+</sup> concentration indicates that the insertion of this one in the host matrix promotes the breakdown of some chemical bonds of the matrix. Intense photoluminescence emission in the visible region with maximum localized around 611 nm under excitation at 255 nm with xenon lamp and with X-ray source were observed. The emissions observed were attributed to the intraconfigurational f-f transitions of Eu<sup>3+</sup>. The lifetime values of the <sup>5</sup>D<inf>0</inf> excited state were between 2.84 and 2.89 ms, indicating the location of Eu<sup>3+</sup> in crystalline systems. This result demonstrates the potential application of the materials in systems for absorption in the ultraviolet region, solar cells, devices generated images and scintillation systems. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-07-14 2018-12-11T16:38:51Z 2018-12-11T16:38:51Z |
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.jallcom.2015.06.239 Journal of Alloys and Compounds, v. 648, p. 467-473. 0925-8388 http://hdl.handle.net/11449/167915 10.1016/j.jallcom.2015.06.239 2-s2.0-84937561186 2-s2.0-84937561186.pdf |
url |
http://dx.doi.org/10.1016/j.jallcom.2015.06.239 http://hdl.handle.net/11449/167915 |
identifier_str_mv |
Journal of Alloys and Compounds, v. 648, p. 467-473. 0925-8388 10.1016/j.jallcom.2015.06.239 2-s2.0-84937561186 2-s2.0-84937561186.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Alloys and Compounds 1,020 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
467-473 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_ |
1808129450791927808 |