Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/handle/123456789/32276 |
Resumo: | CaIn2O4 (CIO) nanocrystals (NCs) were prepared by ultrasonic spray pyrolysis at 1223 K without the use of surfactants to investigate the influences of the nanostructure on the photoluminescence and photo-catalytic properties of this white-light emitter. The optical properties were analyzed by ultraviolet evisible (UVevis) absorption spectroscopy, which indicated a band gap energy of 3.83 eV, and photo-luminescence (PL) measurements at room temperature that showed a broad and intense emission band. X-ray diffraction (XRD) analysis confirmed that the CIO NCs adopted the orthorhombic crystalline phase. Field-emission gun scanning electron microscopy (FEG-SEM) micrographs demonstrated the spherical morphology of the CIO NCs, comprising aggregates of several CIO NCs. Furthermore, the as-synthesized CIO NCs exhibited enhanced activity for the photodegradation of methylene blue (MB) under UVevis irradiation. The chromaticity coordinates were calculated for the sample based on the PL spectrum; the CIO NCs had values of x 1⁄4 0.31 and y 1⁄4 0.38, and this point is located on the white region of the CIE diagram. Ultrasonic spray pyrolysis provides a feasible approach for preparing shape- and size-controlled CIO nanocrystals that hold great potential for photocatalytic applications and as photoluminescent white emitters |
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Paskocimas, Carlos AlbertoMelo, M. M.Araújo, Vinícius DantasTranquilin, Ricardo LuisAlmeida, Cláudio Romero Rodrigues deDelmonte, Maurício Roberto BomioTavares, Mara T. S.Silva, Elson Longo daMotta, Fabiana Villela da2021-04-19T14:43:35Z2021-04-19T14:43:35Z2016-02-15TAVARES, M.T.s.; MELO, M.M.; ARAðJO, V.D.; TRANQUILIN, R.L.; ALMEIDA, C.R.R.; PASKOCIMAS, C.A.; BOMIO, M.R.D.; LONGO, E.; MOTTA, F.V.. Enhancement of the photocatalytic activity and white emission of CaIn 2 O 4 nanocrystals. Journal Of Alloys And Compounds, [S.L.], v. 658, p. 316-323, fev. 2016. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838815314110?via%3Dihub. Acesso em: 11 dez. 2020. http://dx.doi.org/10.1016/j.jallcom.2015.10.155.0925-8388https://repositorio.ufrn.br/handle/123456789/3227610.1016/j.jallcom.2015.10.155ElsevierAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessCaIn2O4Ultrasonic spray pyrolysisNanocrystalsPhotocatalysisPhotoluminescenceWhite-lightEnhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystalsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleCaIn2O4 (CIO) nanocrystals (NCs) were prepared by ultrasonic spray pyrolysis at 1223 K without the use of surfactants to investigate the influences of the nanostructure on the photoluminescence and photo-catalytic properties of this white-light emitter. The optical properties were analyzed by ultraviolet evisible (UVevis) absorption spectroscopy, which indicated a band gap energy of 3.83 eV, and photo-luminescence (PL) measurements at room temperature that showed a broad and intense emission band. X-ray diffraction (XRD) analysis confirmed that the CIO NCs adopted the orthorhombic crystalline phase. Field-emission gun scanning electron microscopy (FEG-SEM) micrographs demonstrated the spherical morphology of the CIO NCs, comprising aggregates of several CIO NCs. Furthermore, the as-synthesized CIO NCs exhibited enhanced activity for the photodegradation of methylene blue (MB) under UVevis irradiation. The chromaticity coordinates were calculated for the sample based on the PL spectrum; the CIO NCs had values of x 1⁄4 0.31 and y 1⁄4 0.38, and this point is located on the white region of the CIE diagram. Ultrasonic spray pyrolysis provides a feasible approach for preparing shape- and size-controlled CIO nanocrystals that hold great potential for photocatalytic applications and as photoluminescent white emittersengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALEnhancementOfThePhotocatalyticActivity_PASKOCIMAS_2016.pdfEnhancementOfThePhotocatalyticActivity_PASKOCIMAS_2016.pdfapplication/pdf1675328https://repositorio.ufrn.br/bitstream/123456789/32276/1/EnhancementOfThePhotocatalyticActivity_PASKOCIMAS_2016.pdf682adf30ad5da54f5078af9d792f4262MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/32276/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/32276/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53TEXTEnhancementOfThePhotocatalyticActivity_PASKOCIMAS_2016.pdf.txtEnhancementOfThePhotocatalyticActivity_PASKOCIMAS_2016.pdf.txtExtracted texttext/plain39458https://repositorio.ufrn.br/bitstream/123456789/32276/4/EnhancementOfThePhotocatalyticActivity_PASKOCIMAS_2016.pdf.txtbf8c20dc9cca13ce36fdcf7861c46737MD54THUMBNAILEnhancementOfThePhotocatalyticActivity_PASKOCIMAS_2016.pdf.jpgEnhancementOfThePhotocatalyticActivity_PASKOCIMAS_2016.pdf.jpgGenerated Thumbnailimage/jpeg1712https://repositorio.ufrn.br/bitstream/123456789/32276/5/EnhancementOfThePhotocatalyticActivity_PASKOCIMAS_2016.pdf.jpgf48eb1d87d91845985e6dd0cf99ac7b5MD55123456789/322762021-04-25 05:53:44.062oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2021-04-25T08:53:44Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.pt_BR.fl_str_mv |
Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals |
title |
Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals |
spellingShingle |
Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals Paskocimas, Carlos Alberto CaIn2O4 Ultrasonic spray pyrolysis Nanocrystals Photocatalysis Photoluminescence White-light |
title_short |
Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals |
title_full |
Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals |
title_fullStr |
Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals |
title_full_unstemmed |
Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals |
title_sort |
Enhancement of the photocatalytic activity and white emission of CaIn2O4 nanocrystals |
author |
Paskocimas, Carlos Alberto |
author_facet |
Paskocimas, Carlos Alberto Melo, M. M. Araújo, Vinícius Dantas Tranquilin, Ricardo Luis Almeida, Cláudio Romero Rodrigues de Delmonte, Maurício Roberto Bomio Tavares, Mara T. S. Silva, Elson Longo da Motta, Fabiana Villela da |
author_role |
author |
author2 |
Melo, M. M. Araújo, Vinícius Dantas Tranquilin, Ricardo Luis Almeida, Cláudio Romero Rodrigues de Delmonte, Maurício Roberto Bomio Tavares, Mara T. S. Silva, Elson Longo da Motta, Fabiana Villela da |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Paskocimas, Carlos Alberto Melo, M. M. Araújo, Vinícius Dantas Tranquilin, Ricardo Luis Almeida, Cláudio Romero Rodrigues de Delmonte, Maurício Roberto Bomio Tavares, Mara T. S. Silva, Elson Longo da Motta, Fabiana Villela da |
dc.subject.por.fl_str_mv |
CaIn2O4 Ultrasonic spray pyrolysis Nanocrystals Photocatalysis Photoluminescence White-light |
topic |
CaIn2O4 Ultrasonic spray pyrolysis Nanocrystals Photocatalysis Photoluminescence White-light |
description |
CaIn2O4 (CIO) nanocrystals (NCs) were prepared by ultrasonic spray pyrolysis at 1223 K without the use of surfactants to investigate the influences of the nanostructure on the photoluminescence and photo-catalytic properties of this white-light emitter. The optical properties were analyzed by ultraviolet evisible (UVevis) absorption spectroscopy, which indicated a band gap energy of 3.83 eV, and photo-luminescence (PL) measurements at room temperature that showed a broad and intense emission band. X-ray diffraction (XRD) analysis confirmed that the CIO NCs adopted the orthorhombic crystalline phase. Field-emission gun scanning electron microscopy (FEG-SEM) micrographs demonstrated the spherical morphology of the CIO NCs, comprising aggregates of several CIO NCs. Furthermore, the as-synthesized CIO NCs exhibited enhanced activity for the photodegradation of methylene blue (MB) under UVevis irradiation. The chromaticity coordinates were calculated for the sample based on the PL spectrum; the CIO NCs had values of x 1⁄4 0.31 and y 1⁄4 0.38, and this point is located on the white region of the CIE diagram. Ultrasonic spray pyrolysis provides a feasible approach for preparing shape- and size-controlled CIO nanocrystals that hold great potential for photocatalytic applications and as photoluminescent white emitters |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016-02-15 |
dc.date.accessioned.fl_str_mv |
2021-04-19T14:43:35Z |
dc.date.available.fl_str_mv |
2021-04-19T14:43:35Z |
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.citation.fl_str_mv |
TAVARES, M.T.s.; MELO, M.M.; ARAðJO, V.D.; TRANQUILIN, R.L.; ALMEIDA, C.R.R.; PASKOCIMAS, C.A.; BOMIO, M.R.D.; LONGO, E.; MOTTA, F.V.. Enhancement of the photocatalytic activity and white emission of CaIn 2 O 4 nanocrystals. Journal Of Alloys And Compounds, [S.L.], v. 658, p. 316-323, fev. 2016. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838815314110?via%3Dihub. Acesso em: 11 dez. 2020. http://dx.doi.org/10.1016/j.jallcom.2015.10.155. |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/handle/123456789/32276 |
dc.identifier.issn.none.fl_str_mv |
0925-8388 |
dc.identifier.doi.none.fl_str_mv |
10.1016/j.jallcom.2015.10.155 |
identifier_str_mv |
TAVARES, M.T.s.; MELO, M.M.; ARAðJO, V.D.; TRANQUILIN, R.L.; ALMEIDA, C.R.R.; PASKOCIMAS, C.A.; BOMIO, M.R.D.; LONGO, E.; MOTTA, F.V.. Enhancement of the photocatalytic activity and white emission of CaIn 2 O 4 nanocrystals. Journal Of Alloys And Compounds, [S.L.], v. 658, p. 316-323, fev. 2016. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838815314110?via%3Dihub. Acesso em: 11 dez. 2020. http://dx.doi.org/10.1016/j.jallcom.2015.10.155. 0925-8388 10.1016/j.jallcom.2015.10.155 |
url |
https://repositorio.ufrn.br/handle/123456789/32276 |
dc.language.iso.fl_str_mv |
eng |
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eng |
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Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ info:eu-repo/semantics/openAccess |
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Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ |
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openAccess |
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Elsevier |
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Elsevier |
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