Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes

Detalhes bibliográficos
Autor(a) principal: Andrade Neto, Nivaldo Freire de
Data de Publicação: 2020
Outros Autores: Lima, A.B., Delmonte, Maurício Roberto Bomio, Motta, Fabiana Villela da
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRN
Texto Completo: https://repositorio.ufrn.br/handle/123456789/41552
Resumo: 2030-12-05
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spelling Andrade Neto, Nivaldo Freire deLima, A.B.Delmonte, Maurício Roberto BomioMotta, Fabiana Villela da2021-10-04T19:47:34Z2020-12-05ANDRADE NETO, N.F.; LIMA, A.B.; BOMIO, M.R.D.; MOTTA, F.V.. Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes. Journal of Alloys and Compounds, [S.L.], v. 844, p. 156077, dez. 2020. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838820324415?via%3Dihub. Acesso em: 20 abr. 2021. http://dx.doi.org/10.1016/j.jallcom.2020.156077.0925-8388https://repositorio.ufrn.br/handle/123456789/4155210.1016/j.jallcom.2020.156077ElsevierMicrowave-assisted hydrothermal methodAg2WO4HeterostructuresPhotocatalysisMicrowave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyesinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article2030-12-05In this work, Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures were synthesized by a microwave-assisted hydrothermal (MAH) method under 140 °C. The powders are characterized by X-ray diffractogram (XRD), Raman spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy, and spectroscopy in the ultraviolet-visible region (UV-Vis). The photocatalytic degradations are investigated by methylene blue (cationic) and methyl orange (anionic) dyes and the mechanisms acting in the photocatalysis are estimated by a scavenger’s methodology. The diffractograms indicate that the MAH method provides powders with high crystallinity and without secondary phases. SEM micrographs indicate that the Ag2MoO4 phase is formed by micrometric particles with a coarse aspect and the Ag2WO4 phase is formed by micrometric rods with a square cross-section. The direct Egap varied from 3.46 to 3.23 eV for the Ag2MoO4 and Ag2WO4 phases, respectively. The adsorptive and photocatalytic tests showed that the Ag2WO4 phase has a better performance against both dyes than the Ag2MoO4 phase, being the best performance against the MB dye (complete discoloration after 20 min). The scavenger’s tests showed that the positive charges (h+) are the main mechanism acting in the photocatalysis for the Ag2MoO4 phase, while the h+ and hydroxyl radicals (∙OH) have a similar influence in the Ag2WO4 phase. Photocatalytic tests of reuse indicated that the samples have a good photocatalytic capacity even in the third consecutive cycleengreponame:Repositório Institucional da UFRNinstname:Universidade Federal do Rio Grande do Norte (UFRN)instacron:UFRNinfo:eu-repo/semantics/openAccessCC-LICENSElicense_rdflicense_rdfapplication/rdf+xml; charset=utf-8914https://repositorio.ufrn.br/bitstream/123456789/41552/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-81484https://repositorio.ufrn.br/bitstream/123456789/41552/3/license.txte9597aa2854d128fd968be5edc8a28d9MD53123456789/415522024-03-19 01:07:11.436oai:https://repositorio.ufrn.br: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Repositório de PublicaçõesPUBhttp://repositorio.ufrn.br/oai/opendoar:2024-03-19T04:07:11Repositório Institucional da UFRN - Universidade Federal do Rio Grande do Norte (UFRN)false
dc.title.pt_BR.fl_str_mv Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes
title Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes
spellingShingle Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes
Andrade Neto, Nivaldo Freire de
Microwave-assisted hydrothermal method
Ag2WO4
Heterostructures
Photocatalysis
title_short Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes
title_full Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes
title_fullStr Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes
title_full_unstemmed Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes
title_sort Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes
author Andrade Neto, Nivaldo Freire de
author_facet Andrade Neto, Nivaldo Freire de
Lima, A.B.
Delmonte, Maurício Roberto Bomio
Motta, Fabiana Villela da
author_role author
author2 Lima, A.B.
Delmonte, Maurício Roberto Bomio
Motta, Fabiana Villela da
author2_role author
author
author
dc.contributor.author.fl_str_mv Andrade Neto, Nivaldo Freire de
Lima, A.B.
Delmonte, Maurício Roberto Bomio
Motta, Fabiana Villela da
dc.subject.por.fl_str_mv Microwave-assisted hydrothermal method
Ag2WO4
Heterostructures
Photocatalysis
topic Microwave-assisted hydrothermal method
Ag2WO4
Heterostructures
Photocatalysis
description 2030-12-05
publishDate 2020
dc.date.issued.fl_str_mv 2020-12-05
dc.date.accessioned.fl_str_mv 2021-10-04T19:47:34Z
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 ANDRADE NETO, N.F.; LIMA, A.B.; BOMIO, M.R.D.; MOTTA, F.V.. Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes. Journal of Alloys and Compounds, [S.L.], v. 844, p. 156077, dez. 2020. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838820324415?via%3Dihub. Acesso em: 20 abr. 2021. http://dx.doi.org/10.1016/j.jallcom.2020.156077.
dc.identifier.uri.fl_str_mv https://repositorio.ufrn.br/handle/123456789/41552
dc.identifier.issn.none.fl_str_mv 0925-8388
dc.identifier.doi.none.fl_str_mv 10.1016/j.jallcom.2020.156077
identifier_str_mv ANDRADE NETO, N.F.; LIMA, A.B.; BOMIO, M.R.D.; MOTTA, F.V.. Microwave-assisted hydrothermal synthesis of Ag2Mo1-xWxO4 (x = 0, 0.25, 0.50, 0.75 and 1 mol%) heterostructures for enhanced photocatalytic degradation of organic dyes. Journal of Alloys and Compounds, [S.L.], v. 844, p. 156077, dez. 2020. Disponível em: https://www.sciencedirect.com/science/article/abs/pii/S0925838820324415?via%3Dihub. Acesso em: 20 abr. 2021. http://dx.doi.org/10.1016/j.jallcom.2020.156077.
0925-8388
10.1016/j.jallcom.2020.156077
url https://repositorio.ufrn.br/handle/123456789/41552
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRN
instname:Universidade Federal do Rio Grande do Norte (UFRN)
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instname_str Universidade Federal do Rio Grande do Norte (UFRN)
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collection Repositório Institucional da UFRN
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