Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites

Autores
Aguirre, Matías Ezequiel; Custo, G; Goes, Marcio S.; Bueno, Paulo R.; Zampieri, Guillermo Enrique; Grela, Maria Alejandra
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Small amounts of water (between and 0.05 and 0.35% V/V) critically determine the morphology and plasmon band of Au/ZnO nanostructures obtained by Au3+ photoreduction on ZnO nanoparticles dispersed in 2-propanol. All the synthesized materials exhibit plasmon induced activity to drive the solvent oxidation; however, the temporal evolution of acetone shows a clear induction time followed by the sudden boost in the rate of the oxidation product, which depends on the photodeposition conditions. Xray photoelectron spectroscopy (XPS) indicates that visible irradiation produces the transformation of surface Au(0) in Au(+). Besides, an increment in the ZnO surface area ascribed to the photoinduced fragmentation of aggregated networks of Au/ZnO nanocomposites is evidenced by XPS and simple adsorption experiments. The changes in the surface properties correlate with the onset in the catalytic activity. Possible mechanisms are discussed to account for the experimental findings.
Fil: Aguirre, Matías Ezequiel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Custo, G. Comisión Nacional de Energía Atómica; Argentina
Fil: Goes, Marcio S.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
Fil: Bueno, Paulo R.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
Fil: Zampieri, Guillermo Enrique. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Grela, Maria Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Plasmonic Photocatalysis
Nanocomposite
Au
Zno
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/25771
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/25771
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO NanocompositesAguirre, Matías EzequielCusto, GGoes, Marcio S.Bueno, Paulo R.Zampieri, Guillermo EnriqueGrela, Maria AlejandraPlasmonic PhotocatalysisNanocompositeAuZnohttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Small amounts of water (between and 0.05 and 0.35% V/V) critically determine the morphology and plasmon band of Au/ZnO nanostructures obtained by Au3+ photoreduction on ZnO nanoparticles dispersed in 2-propanol. All the synthesized materials exhibit plasmon induced activity to drive the solvent oxidation; however, the temporal evolution of acetone shows a clear induction time followed by the sudden boost in the rate of the oxidation product, which depends on the photodeposition conditions. Xray photoelectron spectroscopy (XPS) indicates that visible irradiation produces the transformation of surface Au(0) in Au(+). Besides, an increment in the ZnO surface area ascribed to the photoinduced fragmentation of aggregated networks of Au/ZnO nanocomposites is evidenced by XPS and simple adsorption experiments. The changes in the surface properties correlate with the onset in the catalytic activity. Possible mechanisms are discussed to account for the experimental findings.Fil: Aguirre, Matías Ezequiel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Custo, G. Comisión Nacional de Energía Atómica; ArgentinaFil: Goes, Marcio S.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Bueno, Paulo R.. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Zampieri, Guillermo Enrique. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Grela, Maria Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaAmerican Chemical Society2014-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/25771Aguirre, Matías Ezequiel; Custo, G; Goes, Marcio S.; Bueno, Paulo R.; Zampieri, Guillermo Enrique; et al.; Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites; American Chemical Society; Journal of Physical Chemistry C; 118; 4; 2-2014; 2018-20271932-7447CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/jp410304qinfo:eu-repo/semantics/altIdentifier/doi/10.1021/jp410304qinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T15:11:37Zoai:ri.conicet.gov.ar:11336/25771instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-15 15:11:37.616CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites
title Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites
spellingShingle Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites
Aguirre, Matías Ezequiel
Plasmonic Photocatalysis
Nanocomposite
Au
Zno
title_short Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites
title_full Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites
title_fullStr Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites
title_full_unstemmed Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites
title_sort Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites
dc.creator.none.fl_str_mv Aguirre, Matías Ezequiel
Custo, G
Goes, Marcio S.
Bueno, Paulo R.
Zampieri, Guillermo Enrique
Grela, Maria Alejandra
author Aguirre, Matías Ezequiel
author_facet Aguirre, Matías Ezequiel
Custo, G
Goes, Marcio S.
Bueno, Paulo R.
Zampieri, Guillermo Enrique
Grela, Maria Alejandra
author_role author
author2 Custo, G
Goes, Marcio S.
Bueno, Paulo R.
Zampieri, Guillermo Enrique
Grela, Maria Alejandra
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Plasmonic Photocatalysis
Nanocomposite
Au
Zno
topic Plasmonic Photocatalysis
Nanocomposite
Au
Zno
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Small amounts of water (between and 0.05 and 0.35% V/V) critically determine the morphology and plasmon band of Au/ZnO nanostructures obtained by Au3+ photoreduction on ZnO nanoparticles dispersed in 2-propanol. All the synthesized materials exhibit plasmon induced activity to drive the solvent oxidation; however, the temporal evolution of acetone shows a clear induction time followed by the sudden boost in the rate of the oxidation product, which depends on the photodeposition conditions. Xray photoelectron spectroscopy (XPS) indicates that visible irradiation produces the transformation of surface Au(0) in Au(+). Besides, an increment in the ZnO surface area ascribed to the photoinduced fragmentation of aggregated networks of Au/ZnO nanocomposites is evidenced by XPS and simple adsorption experiments. The changes in the surface properties correlate with the onset in the catalytic activity. Possible mechanisms are discussed to account for the experimental findings.
Fil: Aguirre, Matías Ezequiel. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Custo, G. Comisión Nacional de Energía Atómica; Argentina
Fil: Goes, Marcio S.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
Fil: Bueno, Paulo R.. Universidade Estadual Paulista Julio de Mesquita Filho; Brasil
Fil: Zampieri, Guillermo Enrique. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Grela, Maria Alejandra. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Small amounts of water (between and 0.05 and 0.35% V/V) critically determine the morphology and plasmon band of Au/ZnO nanostructures obtained by Au3+ photoreduction on ZnO nanoparticles dispersed in 2-propanol. All the synthesized materials exhibit plasmon induced activity to drive the solvent oxidation; however, the temporal evolution of acetone shows a clear induction time followed by the sudden boost in the rate of the oxidation product, which depends on the photodeposition conditions. Xray photoelectron spectroscopy (XPS) indicates that visible irradiation produces the transformation of surface Au(0) in Au(+). Besides, an increment in the ZnO surface area ascribed to the photoinduced fragmentation of aggregated networks of Au/ZnO nanocomposites is evidenced by XPS and simple adsorption experiments. The changes in the surface properties correlate with the onset in the catalytic activity. Possible mechanisms are discussed to account for the experimental findings.
publishDate 2014
dc.date.none.fl_str_mv 2014-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/25771
Aguirre, Matías Ezequiel; Custo, G; Goes, Marcio S.; Bueno, Paulo R.; Zampieri, Guillermo Enrique; et al.; Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites; American Chemical Society; Journal of Physical Chemistry C; 118; 4; 2-2014; 2018-2027
1932-7447
CONICET Digital
CONICET
url http://hdl.handle.net/11336/25771
identifier_str_mv Aguirre, Matías Ezequiel; Custo, G; Goes, Marcio S.; Bueno, Paulo R.; Zampieri, Guillermo Enrique; et al.; Critical Water Effect on the Plasmon Band and Visible Light Activity of Au/ZnO Nanocomposites; American Chemical Society; Journal of Physical Chemistry C; 118; 4; 2-2014; 2018-2027
1932-7447
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://pubs.acs.org/doi/abs/10.1021/jp410304q
info:eu-repo/semantics/altIdentifier/doi/10.1021/jp410304q
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1846083264160202752
score 13.22299

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