Cerium molybdate nanocrystals: Microstructural, optical and gas- sensing properties

Detalhes bibliográficos
Autor(a) principal: Oliveira, Fernanda Karine Fonseca
Data de Publicação: 2021
Outros Autores: Santiago, Anderson de Azevedo Gomes, Catto, Anderson de Azevedo Gomes, Silva, Luís Fernando da, Tranquilin, Ricardo Luis, Silva, Elson Longo da, Motta, Fabiana Villela da, Delmonte, Maurício Roberto Bomio
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/handle/123456789/37980
Resumo: Metal molybdate compounds have attracted considerable attention due to their technological applications. Herein, we demonstrate the controllable synthesis of cerium molybdate (Ce2(MoO4)3) nanocrystals via the co-precipitation method followed by microwave-assisted hydrothermal (MAH) treatment at 150 C during different times (15, 30 and 60 min). The effect of MAH treatment time on the microstructural, optical, and ozone gas-sensing properties of these nanocrystals was investigated. X-ray diffraction (XRD) and Raman spectroscopy measurements revealed that the samples presented a single-crystalline phase with scheelite-type tetragonal structure. Field emission gun scanning electron microscopy (FEG-SEM) images showed that the MAH conditions favored changes in the Ce2(MoO4)3 nano crystal morphology. Photoluminescence (PL) measurements indicated a significant enhancement of PL emission with MAH time, suggesting an increase in the intrinsic defects formed during the MAH treatment. The gas-sensing performance of cerium molybdate nanocrystals towards sub-ppm ozone levels was also investigated. The experiments revealed complete recovery and good repeatability as well as good sensor response, which was improved in the sample synthesized at longer MAH time
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spelling Oliveira, Fernanda Karine FonsecaSantiago, Anderson de Azevedo GomesCatto, Anderson de Azevedo GomesSilva, Luís Fernando daTranquilin, Ricardo LuisSilva, Elson Longo daMotta, Fabiana Villela daDelmonte, Maurício Roberto Bomio2021-09-23T14:05:44Z2021-09-23T14:05:44Z2021-03-15OLIVEIRA, Fernanda K.F.; SANTIAGO, Anderson A.G.; CATTO, Ariadne C.; SILVA, Luís F. da; TRANQUILIN, Ricardo L.; LONGO, Elson; MOTTA, Fabiana V.; BOMIO, Mauricio R.D.. Cerium molybdate nanocrystals: microstructural, optical and gas-sensing properties. Journal of Alloys and Compounds, [S.L.], v. 857, p. 157562, mar. 2021. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838820339268?via%3Dihub. Acesso em: 16 abr. 2021. http://dx.doi.org/10.1016/j.jallcom.2020.157562.0925-8388https://repositorio.ufrn.br/handle/123456789/3798010.1016/j.jallcom.2020.157562ElsevierAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessCerium molybdateMicrowave-assisted hydrothermalMicrostructureGas sensorOzoneCerium molybdate nanocrystals: Microstructural, optical and gas- sensing propertiesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleMetal molybdate compounds have attracted considerable attention due to their technological applications. Herein, we demonstrate the controllable synthesis of cerium molybdate (Ce2(MoO4)3) nanocrystals via the co-precipitation method followed by microwave-assisted hydrothermal (MAH) treatment at 150 C during different times (15, 30 and 60 min). The effect of MAH treatment time on the microstructural, optical, and ozone gas-sensing properties of these nanocrystals was investigated. X-ray diffraction (XRD) and Raman spectroscopy measurements revealed that the samples presented a single-crystalline phase with scheelite-type tetragonal structure. Field emission gun scanning electron microscopy (FEG-SEM) images showed that the MAH conditions favored changes in the Ce2(MoO4)3 nano crystal morphology. Photoluminescence (PL) measurements indicated a significant enhancement of PL emission with MAH time, suggesting an increase in the intrinsic defects formed during the MAH treatment. The gas-sensing performance of cerium molybdate nanocrystals towards sub-ppm ozone levels was also investigated. The experiments revealed complete recovery and good repeatability as well as good sensor response, which was improved in the sample synthesized at longer MAH timeengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALCeriumMolybdateNanocrystals_BOMIO_2021.pdfCeriumMolybdateNanocrystals_BOMIO_2021.pdfapplication/pdf3856295https://repositorio.ufrn.br/bitstream/123456789/37980/1/CeriumMolybdateNanocrystals_BOMIO_2021.pdf67ee84e74779bbe450d837f457f72488MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/37980/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/37980/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53123456789/379802021-10-07 10:35:41.153oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2021-10-07T13:35:41Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Cerium molybdate nanocrystals: Microstructural, optical and gas- sensing properties
title Cerium molybdate nanocrystals: Microstructural, optical and gas- sensing properties
spellingShingle Cerium molybdate nanocrystals: Microstructural, optical and gas- sensing properties
Oliveira, Fernanda Karine Fonseca
Cerium molybdate
Microwave-assisted hydrothermal
Microstructure
Gas sensor
Ozone
title_short Cerium molybdate nanocrystals: Microstructural, optical and gas- sensing properties
title_full Cerium molybdate nanocrystals: Microstructural, optical and gas- sensing properties
title_fullStr Cerium molybdate nanocrystals: Microstructural, optical and gas- sensing properties
title_full_unstemmed Cerium molybdate nanocrystals: Microstructural, optical and gas- sensing properties
title_sort Cerium molybdate nanocrystals: Microstructural, optical and gas- sensing properties
author Oliveira, Fernanda Karine Fonseca
author_facet Oliveira, Fernanda Karine Fonseca
Santiago, Anderson de Azevedo Gomes
Catto, Anderson de Azevedo Gomes
Silva, Luís Fernando da
Tranquilin, Ricardo Luis
Silva, Elson Longo da
Motta, Fabiana Villela da
Delmonte, Maurício Roberto Bomio
author_role author
author2 Santiago, Anderson de Azevedo Gomes
Catto, Anderson de Azevedo Gomes
Silva, Luís Fernando da
Tranquilin, Ricardo Luis
Silva, Elson Longo da
Motta, Fabiana Villela da
Delmonte, Maurício Roberto Bomio
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Oliveira, Fernanda Karine Fonseca
Santiago, Anderson de Azevedo Gomes
Catto, Anderson de Azevedo Gomes
Silva, Luís Fernando da
Tranquilin, Ricardo Luis
Silva, Elson Longo da
Motta, Fabiana Villela da
Delmonte, Maurício Roberto Bomio
dc.subject.por.fl_str_mv Cerium molybdate
Microwave-assisted hydrothermal
Microstructure
Gas sensor
Ozone
topic Cerium molybdate
Microwave-assisted hydrothermal
Microstructure
Gas sensor
Ozone
description Metal molybdate compounds have attracted considerable attention due to their technological applications. Herein, we demonstrate the controllable synthesis of cerium molybdate (Ce2(MoO4)3) nanocrystals via the co-precipitation method followed by microwave-assisted hydrothermal (MAH) treatment at 150 C during different times (15, 30 and 60 min). The effect of MAH treatment time on the microstructural, optical, and ozone gas-sensing properties of these nanocrystals was investigated. X-ray diffraction (XRD) and Raman spectroscopy measurements revealed that the samples presented a single-crystalline phase with scheelite-type tetragonal structure. Field emission gun scanning electron microscopy (FEG-SEM) images showed that the MAH conditions favored changes in the Ce2(MoO4)3 nano crystal morphology. Photoluminescence (PL) measurements indicated a significant enhancement of PL emission with MAH time, suggesting an increase in the intrinsic defects formed during the MAH treatment. The gas-sensing performance of cerium molybdate nanocrystals towards sub-ppm ozone levels was also investigated. The experiments revealed complete recovery and good repeatability as well as good sensor response, which was improved in the sample synthesized at longer MAH time
publishDate 2021
dc.date.accessioned.fl_str_mv 2021-09-23T14:05:44Z
dc.date.available.fl_str_mv 2021-09-23T14:05:44Z
dc.date.issued.fl_str_mv 2021-03-15
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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status_str publishedVersion
dc.identifier.citation.fl_str_mv OLIVEIRA, Fernanda K.F.; SANTIAGO, Anderson A.G.; CATTO, Ariadne C.; SILVA, Luís F. da; TRANQUILIN, Ricardo L.; LONGO, Elson; MOTTA, Fabiana V.; BOMIO, Mauricio R.D.. Cerium molybdate nanocrystals: microstructural, optical and gas-sensing properties. Journal of Alloys and Compounds, [S.L.], v. 857, p. 157562, mar. 2021. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838820339268?via%3Dihub. Acesso em: 16 abr. 2021. http://dx.doi.org/10.1016/j.jallcom.2020.157562.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/handle/123456789/37980
dc.identifier.issn.none.fl_str_mv 0925-8388
dc.identifier.doi.none.fl_str_mv 10.1016/j.jallcom.2020.157562
identifier_str_mv OLIVEIRA, Fernanda K.F.; SANTIAGO, Anderson A.G.; CATTO, Ariadne C.; SILVA, Luís F. da; TRANQUILIN, Ricardo L.; LONGO, Elson; MOTTA, Fabiana V.; BOMIO, Mauricio R.D.. Cerium molybdate nanocrystals: microstructural, optical and gas-sensing properties. Journal of Alloys and Compounds, [S.L.], v. 857, p. 157562, mar. 2021. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838820339268?via%3Dihub. Acesso em: 16 abr. 2021. http://dx.doi.org/10.1016/j.jallcom.2020.157562.
0925-8388
10.1016/j.jallcom.2020.157562
url https://repositorio.ufrn.br/handle/123456789/37980
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language eng
dc.rights.driver.fl_str_mv Attribution 3.0 Brazil
http://creativecommons.org/licenses/by/3.0/br/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 3.0 Brazil
http://creativecommons.org/licenses/by/3.0/br/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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