Enhanced photodegradation of synthetic dyes mediated by Ag3PO4-based semiconductors under visible light irradiation

Four silver phosphate-based materials were successfully synthesized, characterized, and evaluated, together with TiO, in the photodegradation of synthetic dyes (tartrazine, Orange II, rhodamine, and Brilliant Blue FCF) under two irradiation sources centered at 420 and 450 nm. Scanning Electron Micro...

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Authors: Pavanello, Alice, Blasco, A., Johnston, P. F., Miranda, M. A., Marín, María Luisa
Format: article
Status:Published version
Publication Date:2020
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/234493
Online Access:http://hdl.handle.net/10261/234493
Access Level:Open access
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spelling Enhanced photodegradation of synthetic dyes mediated by Ag3PO4-based semiconductors under visible light irradiationPavanello, AliceBlasco, A.Johnston, P. F.Miranda, M. A.Marín, María LuisaFour silver phosphate-based materials were successfully synthesized, characterized, and evaluated, together with TiO, in the photodegradation of synthetic dyes (tartrazine, Orange II, rhodamine, and Brilliant Blue FCF) under two irradiation sources centered at 420 and 450 nm. Scanning Electron Microscopy (SEM) images showed different topologies of the synthesized materials, whereas diffuse reflectance spectra demonstrated that they display absorption up to 500 nm. Degradation experiments were performed in parallel with the silver materials and TiO. Upon irradiation centered at 420 nm, the abatement of the dyes was slightly more efficient in the case of TiO —except for Orange II. Nevertheless, upon irradiation centered at 450 nm, TiO demonstrated complete inefficiency and silver phosphates accomplished the complete abatement of the dyes—except for Brilliant Blue FCF. A careful analysis of the achieved degradation of dyes revealed that the main reaction mechanism involves electron transfer to the photogenerated holes in the valence band of silver photocatalysts, together with the direct excitation of dyes and the subsequent formation of reactive species. The performance of TiO was only comparable at the shorter wavelength when hydroxyl radicals could be formed; however, it could not compete under irradiation at 450 nm since the formed superoxide anion is not as reactive as hydroxyl radicals.This research was funded by Spanish Government (Grant SEV-2016-0683), Generalitat Valenciana (Prometeo Program) and H2020/Marie Skłodowska-Curie Actions under the AQUAlity project (Reference: 765860)Multidisciplinary Digital Publishing InstituteMinisterio de Economía y Competitividad (España)Generalitat ValencianaConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2021202120202021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/234493reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2016-0683http://dx.doi.org/10.3390/catal10070774Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2344932026-05-22T06:33:51Z
dc.title.none.fl_str_mv Enhanced photodegradation of synthetic dyes mediated by Ag3PO4-based semiconductors under visible light irradiation
title Enhanced photodegradation of synthetic dyes mediated by Ag3PO4-based semiconductors under visible light irradiation
spellingShingle Enhanced photodegradation of synthetic dyes mediated by Ag3PO4-based semiconductors under visible light irradiation
Pavanello, Alice
title_short Enhanced photodegradation of synthetic dyes mediated by Ag3PO4-based semiconductors under visible light irradiation
title_full Enhanced photodegradation of synthetic dyes mediated by Ag3PO4-based semiconductors under visible light irradiation
title_fullStr Enhanced photodegradation of synthetic dyes mediated by Ag3PO4-based semiconductors under visible light irradiation
title_full_unstemmed Enhanced photodegradation of synthetic dyes mediated by Ag3PO4-based semiconductors under visible light irradiation
title_sort Enhanced photodegradation of synthetic dyes mediated by Ag3PO4-based semiconductors under visible light irradiation
dc.creator.none.fl_str_mv Pavanello, Alice
Blasco, A.
Johnston, P. F.
Miranda, M. A.
Marín, María Luisa
author Pavanello, Alice
author_facet Pavanello, Alice
Blasco, A.
Johnston, P. F.
Miranda, M. A.
Marín, María Luisa
author_role author
author2 Blasco, A.
Johnston, P. F.
Miranda, M. A.
Marín, María Luisa
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
Generalitat Valenciana
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
description Four silver phosphate-based materials were successfully synthesized, characterized, and evaluated, together with TiO, in the photodegradation of synthetic dyes (tartrazine, Orange II, rhodamine, and Brilliant Blue FCF) under two irradiation sources centered at 420 and 450 nm. Scanning Electron Microscopy (SEM) images showed different topologies of the synthesized materials, whereas diffuse reflectance spectra demonstrated that they display absorption up to 500 nm. Degradation experiments were performed in parallel with the silver materials and TiO. Upon irradiation centered at 420 nm, the abatement of the dyes was slightly more efficient in the case of TiO —except for Orange II. Nevertheless, upon irradiation centered at 450 nm, TiO demonstrated complete inefficiency and silver phosphates accomplished the complete abatement of the dyes—except for Brilliant Blue FCF. A careful analysis of the achieved degradation of dyes revealed that the main reaction mechanism involves electron transfer to the photogenerated holes in the valence band of silver photocatalysts, together with the direct excitation of dyes and the subsequent formation of reactive species. The performance of TiO was only comparable at the shorter wavelength when hydroxyl radicals could be formed; however, it could not compete under irradiation at 450 nm since the formed superoxide anion is not as reactive as hydroxyl radicals.
publishDate 2020
dc.date.none.fl_str_mv 2020
2021
2021
2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/234493
url http://hdl.handle.net/10261/234493
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2016-0683
http://dx.doi.org/10.3390/catal10070774
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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