Enhancement photocatalytic activity of the heterojunction of two-dimensional hybrid semiconductors ZnO/V2O5

In this work, we report the fabrication of the new heterojunction of two 2D hybrid layered semiconductors-ZnO (stearic acid)/VO (hexadecylamine)-and its behavior in the degradation of aqueous methylene blue under visible light irradiation. The optimal photocatalyst efficiency, reached at a ZnO (stea...

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Autores: Aliaga, Juan|||0000-0003-2243-0805, Cifuentes, Nasla, González, Guillermo, Sotomayor Torres, Clivia M.|||0000-0001-9986-2716, Benavente, Eglantina|||0000-0002-8414-9317
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:204926
Acceso en línea:https://ddd.uab.cat/record/204926
https://dx.doi.org/urn:doi:10.3390/catal8090374
Access Level:acceso abierto
Palabra clave:Photocatalysis
Heterojunction
Two-dimensional semiconductor
ZnO
V2O5
Methylene blue degradation
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spelling Enhancement photocatalytic activity of the heterojunction of two-dimensional hybrid semiconductors ZnO/V2O5Aliaga, Juan|||0000-0003-2243-0805Cifuentes, NaslaGonzález, GuillermoSotomayor Torres, Clivia M.|||0000-0001-9986-2716Benavente, Eglantina|||0000-0002-8414-9317PhotocatalysisHeterojunctionTwo-dimensional semiconductorZnOV2O5Methylene blue degradationIn this work, we report the fabrication of the new heterojunction of two 2D hybrid layered semiconductors-ZnO (stearic acid)/VO (hexadecylamine)-and its behavior in the degradation of aqueous methylene blue under visible light irradiation. The optimal photocatalyst efficiency, reached at a ZnO (stearic acid)/VO (hexadecylamine) ratio of 1:0.25, results in being six times higher than that of pristine zinc oxide. Reusability test shows that after three photocatalysis cycles, no significant changes in either the dye degradation efficiency loss, nor the photocatalyst structure, occur. Visible light photocatalytic performance observed indicates there is synergetic effect between both 2D nanocomposites used in the heterojunction. The visible light absorption enhancement promoted by the narrower bandgap VO based components; an increased photo generated charge separation favored by extensive interface area; and abundance of hydrophobic sites for dye adsorption appear as probable causes of the improved photocatalytic efficiency in this hybrid semiconductors heterojunction. Estimated band-edge positions for both conduction and valence band of semiconductors, together with experiments using specific radical scavengers, allow a plausible photodegradation mechanism. 22018-01-0120182018-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/204926https://dx.doi.org/urn:doi:10.3390/catal8090374reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengMinisterio de Economía y Competitividad https://doi.org/10.13039/501100003329 FIS2015-70862-PMinisterio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2013-0295open accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2049262026-06-06T12:50:31Z
dc.title.none.fl_str_mv Enhancement photocatalytic activity of the heterojunction of two-dimensional hybrid semiconductors ZnO/V2O5
title Enhancement photocatalytic activity of the heterojunction of two-dimensional hybrid semiconductors ZnO/V2O5
spellingShingle Enhancement photocatalytic activity of the heterojunction of two-dimensional hybrid semiconductors ZnO/V2O5
Aliaga, Juan|||0000-0003-2243-0805
Photocatalysis
Heterojunction
Two-dimensional semiconductor
ZnO
V2O5
Methylene blue degradation
title_short Enhancement photocatalytic activity of the heterojunction of two-dimensional hybrid semiconductors ZnO/V2O5
title_full Enhancement photocatalytic activity of the heterojunction of two-dimensional hybrid semiconductors ZnO/V2O5
title_fullStr Enhancement photocatalytic activity of the heterojunction of two-dimensional hybrid semiconductors ZnO/V2O5
title_full_unstemmed Enhancement photocatalytic activity of the heterojunction of two-dimensional hybrid semiconductors ZnO/V2O5
title_sort Enhancement photocatalytic activity of the heterojunction of two-dimensional hybrid semiconductors ZnO/V2O5
dc.creator.none.fl_str_mv Aliaga, Juan|||0000-0003-2243-0805
Cifuentes, Nasla
González, Guillermo
Sotomayor Torres, Clivia M.|||0000-0001-9986-2716
Benavente, Eglantina|||0000-0002-8414-9317
author Aliaga, Juan|||0000-0003-2243-0805
author_facet Aliaga, Juan|||0000-0003-2243-0805
Cifuentes, Nasla
González, Guillermo
Sotomayor Torres, Clivia M.|||0000-0001-9986-2716
Benavente, Eglantina|||0000-0002-8414-9317
author_role author
author2 Cifuentes, Nasla
González, Guillermo
Sotomayor Torres, Clivia M.|||0000-0001-9986-2716
Benavente, Eglantina|||0000-0002-8414-9317
author2_role author
author
author
author
dc.subject.none.fl_str_mv Photocatalysis
Heterojunction
Two-dimensional semiconductor
ZnO
V2O5
Methylene blue degradation
topic Photocatalysis
Heterojunction
Two-dimensional semiconductor
ZnO
V2O5
Methylene blue degradation
description In this work, we report the fabrication of the new heterojunction of two 2D hybrid layered semiconductors-ZnO (stearic acid)/VO (hexadecylamine)-and its behavior in the degradation of aqueous methylene blue under visible light irradiation. The optimal photocatalyst efficiency, reached at a ZnO (stearic acid)/VO (hexadecylamine) ratio of 1:0.25, results in being six times higher than that of pristine zinc oxide. Reusability test shows that after three photocatalysis cycles, no significant changes in either the dye degradation efficiency loss, nor the photocatalyst structure, occur. Visible light photocatalytic performance observed indicates there is synergetic effect between both 2D nanocomposites used in the heterojunction. The visible light absorption enhancement promoted by the narrower bandgap VO based components; an increased photo generated charge separation favored by extensive interface area; and abundance of hydrophobic sites for dye adsorption appear as probable causes of the improved photocatalytic efficiency in this hybrid semiconductors heterojunction. Estimated band-edge positions for both conduction and valence band of semiconductors, together with experiments using specific radical scavengers, allow a plausible photodegradation mechanism.
publishDate 2018
dc.date.none.fl_str_mv 2
2018-01-01
2018
2018-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/204926
https://dx.doi.org/urn:doi:10.3390/catal8090374
url https://ddd.uab.cat/record/204926
https://dx.doi.org/urn:doi:10.3390/catal8090374
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 FIS2015-70862-P
Ministerio de Economía y Competitividad https://doi.org/10.13039/501100003329 SEV-2013-0295
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,298079

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