Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity
Autor(a) principal: | |
---|---|
Data de Publicação: | 2019 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRN |
Texto Completo: | https://repositorio.ufrn.br/handle/123456789/32154 |
Resumo: | In this work, CeO2:xEu3+ (x=0, 0.01, 0.02, 0.04 and 0.08 mol%) microspheres were obtained by the fast and continuous ultrasonic spray pyrolysis method. Powders were characterized by X-ray difraction (XRD), X-ray fuorescence analysis (XRF), scanning electronic microscopy (FESEM), Raman spectra, UV–Visible spectroscopy (UV–Vis) and photocatalytic activity. All XRD patterns were indexed by the cubic structure of the fuorite type, without the presence of secondary phases, indicating success in the Eu3+ doping in the CeO2 structure. In addition, The XRF analysis confrmed the presence of Eu in the CeO2 powders. In the Raman spectra of the samples occurs the vibrational mode F2g, which is a characteristic band of materials with the fuorite type structure. Moreover, as the Eu3+ ion increased, it was noticed the appearance of additional bands referring to oxygen vacancies. FESEM showed that the CeO2:xEu3+ particles have a spherical morphology with homogeneous chemical composition and particle size between 73 and 1560 nm. It can be seen a slight increase of defects in their morphology as the Eu3+ ion increases. The band gap varies between 3.22 and 3.28 eV, being infuenced by defects in oxygen vacancies and the concentration of Ce3+ ion. The addition of Eu3+ generates the introduction of intermediary levels in the conduction band of CeO2, besides increasing the reactive species efects, favoring the photocatalysis of Rhodamine B dye |
id |
UFRN_b1488a8fe3a217ff033456e5e6f1c9d7 |
---|---|
oai_identifier_str |
oai:https://repositorio.ufrn.br:123456789/32154 |
network_acronym_str |
UFRN |
network_name_str |
Repositório Institucional da UFRN |
repository_id_str |
|
spelling |
Paskocimas, Carlos AlbertoSantiago, Anderson de Azevedo GomesAndrade Neto, Nivaldo Freire deSilva, Elson Longo daMotta, Fabiana Villela daDelmonte, Maurício Roberto Bomio2021-04-12T14:57:22Z2021-04-12T14:57:22Z2019-05-17SANTIAGO, A. A. G. ; ANDRADE NETO, N. F. ; LONGO, E. ; PASKOCIMAS, C. A. ; F. V. MOTTA ; BOMIO, M. R. D. . Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity. Journal of Materials Science: Materials in Electronics, v. 30, p. 11508-11519, 2019. Disponível em: https://link.springer.com/article/10.1007%2Fs10854-019-01506-7. Acesso em: 04 dez. 2020. https://doi.org/10.1007/s10854-019-01506-71573-482X0957-4522https://repositorio.ufrn.br/handle/123456789/3215410.1007/s10854-019-01506-7SpringerAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/info:eu-repo/semantics/openAccessEu3+ dopedCeO2 microspheresUltrasonic spray pyrolysisPhotocatalytic activityFast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activityinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleIn this work, CeO2:xEu3+ (x=0, 0.01, 0.02, 0.04 and 0.08 mol%) microspheres were obtained by the fast and continuous ultrasonic spray pyrolysis method. Powders were characterized by X-ray difraction (XRD), X-ray fuorescence analysis (XRF), scanning electronic microscopy (FESEM), Raman spectra, UV–Visible spectroscopy (UV–Vis) and photocatalytic activity. All XRD patterns were indexed by the cubic structure of the fuorite type, without the presence of secondary phases, indicating success in the Eu3+ doping in the CeO2 structure. In addition, The XRF analysis confrmed the presence of Eu in the CeO2 powders. In the Raman spectra of the samples occurs the vibrational mode F2g, which is a characteristic band of materials with the fuorite type structure. Moreover, as the Eu3+ ion increased, it was noticed the appearance of additional bands referring to oxygen vacancies. FESEM showed that the CeO2:xEu3+ particles have a spherical morphology with homogeneous chemical composition and particle size between 73 and 1560 nm. It can be seen a slight increase of defects in their morphology as the Eu3+ ion increases. The band gap varies between 3.22 and 3.28 eV, being infuenced by defects in oxygen vacancies and the concentration of Ce3+ ion. The addition of Eu3+ generates the introduction of intermediary levels in the conduction band of CeO2, besides increasing the reactive species efects, favoring the photocatalysis of Rhodamine B dyeengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNORIGINALFastContinuousObtaining_PASKOCIMAS_2019.pdfFastContinuousObtaining_PASKOCIMAS_2019.pdfapplication/pdf6826198https://repositorio.ufrn.br/bitstream/123456789/32154/1/FastContinuousObtaining_PASKOCIMAS_2019.pdf5c54fb7bd3676bad61ef3ba9652e34a7MD51CC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/32154/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/32154/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53TEXTFastContinuousObtaining_PASKOCIMAS_2019.pdf.txtFastContinuousObtaining_PASKOCIMAS_2019.pdf.txtExtracted texttext/plain41226https://repositorio.ufrn.br/bitstream/123456789/32154/4/FastContinuousObtaining_PASKOCIMAS_2019.pdf.txte91869c52d6d49fe425f939448c1373dMD54THUMBNAILFastContinuousObtaining_PASKOCIMAS_2019.pdf.jpgFastContinuousObtaining_PASKOCIMAS_2019.pdf.jpgGenerated Thumbnailimage/jpeg1846https://repositorio.ufrn.br/bitstream/123456789/32154/5/FastContinuousObtaining_PASKOCIMAS_2019.pdf.jpge0c71954876b94d05a201202ecfb2211MD55123456789/321542021-10-04 17:02:38.312oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2021-10-04T20:02:38Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false |
dc.title.pt_BR.fl_str_mv |
Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity |
title |
Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity |
spellingShingle |
Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity Paskocimas, Carlos Alberto Eu3+ doped CeO2 microspheres Ultrasonic spray pyrolysis Photocatalytic activity |
title_short |
Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity |
title_full |
Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity |
title_fullStr |
Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity |
title_full_unstemmed |
Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity |
title_sort |
Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity |
author |
Paskocimas, Carlos Alberto |
author_facet |
Paskocimas, Carlos Alberto Santiago, Anderson de Azevedo Gomes Andrade Neto, Nivaldo Freire de Silva, Elson Longo da Motta, Fabiana Villela da Delmonte, Maurício Roberto Bomio |
author_role |
author |
author2 |
Santiago, Anderson de Azevedo Gomes Andrade Neto, Nivaldo Freire de Silva, Elson Longo da Motta, Fabiana Villela da Delmonte, Maurício Roberto Bomio |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Paskocimas, Carlos Alberto Santiago, Anderson de Azevedo Gomes Andrade Neto, Nivaldo Freire de Silva, Elson Longo da Motta, Fabiana Villela da Delmonte, Maurício Roberto Bomio |
dc.subject.por.fl_str_mv |
Eu3+ doped CeO2 microspheres Ultrasonic spray pyrolysis Photocatalytic activity |
topic |
Eu3+ doped CeO2 microspheres Ultrasonic spray pyrolysis Photocatalytic activity |
description |
In this work, CeO2:xEu3+ (x=0, 0.01, 0.02, 0.04 and 0.08 mol%) microspheres were obtained by the fast and continuous ultrasonic spray pyrolysis method. Powders were characterized by X-ray difraction (XRD), X-ray fuorescence analysis (XRF), scanning electronic microscopy (FESEM), Raman spectra, UV–Visible spectroscopy (UV–Vis) and photocatalytic activity. All XRD patterns were indexed by the cubic structure of the fuorite type, without the presence of secondary phases, indicating success in the Eu3+ doping in the CeO2 structure. In addition, The XRF analysis confrmed the presence of Eu in the CeO2 powders. In the Raman spectra of the samples occurs the vibrational mode F2g, which is a characteristic band of materials with the fuorite type structure. Moreover, as the Eu3+ ion increased, it was noticed the appearance of additional bands referring to oxygen vacancies. FESEM showed that the CeO2:xEu3+ particles have a spherical morphology with homogeneous chemical composition and particle size between 73 and 1560 nm. It can be seen a slight increase of defects in their morphology as the Eu3+ ion increases. The band gap varies between 3.22 and 3.28 eV, being infuenced by defects in oxygen vacancies and the concentration of Ce3+ ion. The addition of Eu3+ generates the introduction of intermediary levels in the conduction band of CeO2, besides increasing the reactive species efects, favoring the photocatalysis of Rhodamine B dye |
publishDate |
2019 |
dc.date.issued.fl_str_mv |
2019-05-17 |
dc.date.accessioned.fl_str_mv |
2021-04-12T14:57:22Z |
dc.date.available.fl_str_mv |
2021-04-12T14:57:22Z |
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 |
SANTIAGO, A. A. G. ; ANDRADE NETO, N. F. ; LONGO, E. ; PASKOCIMAS, C. A. ; F. V. MOTTA ; BOMIO, M. R. D. . Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity. Journal of Materials Science: Materials in Electronics, v. 30, p. 11508-11519, 2019. Disponível em: https://link.springer.com/article/10.1007%2Fs10854-019-01506-7. Acesso em: 04 dez. 2020. https://doi.org/10.1007/s10854-019-01506-7 |
dc.identifier.uri.fl_str_mv |
https://repositorio.ufrn.br/handle/123456789/32154 |
dc.identifier.issn.none.fl_str_mv |
1573-482X 0957-4522 |
dc.identifier.doi.none.fl_str_mv |
10.1007/s10854-019-01506-7 |
identifier_str_mv |
SANTIAGO, A. A. G. ; ANDRADE NETO, N. F. ; LONGO, E. ; PASKOCIMAS, C. A. ; F. V. MOTTA ; BOMIO, M. R. D. . Fast and continuous obtaining of Eu3+ doped CeO2 microspheres by ultrasonic spray pyrolysis: characterization and photocatalytic activity. Journal of Materials Science: Materials in Electronics, v. 30, p. 11508-11519, 2019. Disponível em: https://link.springer.com/article/10.1007%2Fs10854-019-01506-7. Acesso em: 04 dez. 2020. https://doi.org/10.1007/s10854-019-01506-7 1573-482X 0957-4522 10.1007/s10854-019-01506-7 |
url |
https://repositorio.ufrn.br/handle/123456789/32154 |
dc.language.iso.fl_str_mv |
eng |
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 |
Springer |
publisher.none.fl_str_mv |
Springer |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRN instname:Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN |
instname_str |
Universidade Federal do Rio Grande do Norte (UFRN) |
instacron_str |
UFRN |
institution |
UFRN |
reponame_str |
Repositório Institucional da UFRN |
collection |
Repositório Institucional da UFRN |
bitstream.url.fl_str_mv |
https://repositorio.ufrn.br/bitstream/123456789/32154/1/FastContinuousObtaining_PASKOCIMAS_2019.pdf https://repositorio.ufrn.br/bitstream/123456789/32154/2/license_rdf https://repositorio.ufrn.br/bitstream/123456789/32154/3/license.txt https://repositorio.ufrn.br/bitstream/123456789/32154/4/FastContinuousObtaining_PASKOCIMAS_2019.pdf.txt https://repositorio.ufrn.br/bitstream/123456789/32154/5/FastContinuousObtaining_PASKOCIMAS_2019.pdf.jpg |
bitstream.checksum.fl_str_mv |
5c54fb7bd3676bad61ef3ba9652e34a7 4d2950bda3d176f570a9f8b328dfbbef e9597aa2854d128fd968be5edc8a28d9 e91869c52d6d49fe425f939448c1373d e0c71954876b94d05a201202ecfb2211 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN) |
repository.mail.fl_str_mv |
|
_version_ |
1802117509068881920 |