New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation

Autores
Mendive, Cecilia Beatriz; Hansmann, David; Bredow T.; Bahnemann D.
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Infrared spectroscopic studies of a UVA irradiated layer of TiO2 nanoparticles in contact with an aqueous solution free of any photocatalytic degradable compound showed that a volume of water is incorporated in the layer. Such a phenomenon is attributed to a mechanism of deaggregation of particles agglomerates resulting from the capacity of the system to use the energy released by recombination of photogenerated electrons and holes. In this mechanism, bonds responsible for maintaining nanoparticles agglomerated are broken, allowing the particles to separate. Water molecules fill the space in between the particles, and it is experimentally evinced by the increase in the band corresponding to the bending mode of water. Under UVA illumination, the TiO2 exposed area thus increases, hence promoting an enhancement of the adsorption capacity of the photocatalyst.
Fil: Mendive, Cecilia Beatriz. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina
Fil: Hansmann, David. Universitat Bonn; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina
Fil: Bredow T.. Universitat Bonn; Alemania
Fil: Bahnemann D.. Leibniz Universitat Hannover; Alemania
Materia
DEAGGREGATION
TIO2
PHOTOCATALYTIC ACTIVITY
FTIR-ATR
NANOPARTICLES
WATER
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:11336/278625
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole CreationMendive, Cecilia BeatrizHansmann, DavidBredow T.Bahnemann D.DEAGGREGATIONTIO2PHOTOCATALYTIC ACTIVITYFTIR-ATRNANOPARTICLESWATERhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Infrared spectroscopic studies of a UVA irradiated layer of TiO2 nanoparticles in contact with an aqueous solution free of any photocatalytic degradable compound showed that a volume of water is incorporated in the layer. Such a phenomenon is attributed to a mechanism of deaggregation of particles agglomerates resulting from the capacity of the system to use the energy released by recombination of photogenerated electrons and holes. In this mechanism, bonds responsible for maintaining nanoparticles agglomerated are broken, allowing the particles to separate. Water molecules fill the space in between the particles, and it is experimentally evinced by the increase in the band corresponding to the bending mode of water. Under UVA illumination, the TiO2 exposed area thus increases, hence promoting an enhancement of the adsorption capacity of the photocatalyst.Fil: Mendive, Cecilia Beatriz. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; ArgentinaFil: Hansmann, David. Universitat Bonn; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; ArgentinaFil: Bredow T.. Universitat Bonn; AlemaniaFil: Bahnemann D.. Leibniz Universitat Hannover; AlemaniaAmerican Chemical Society2011-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/278625Mendive, Cecilia Beatriz; Hansmann, David; Bredow T.; Bahnemann D.; New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation; American Chemical Society; Journal of Physical Chemistry C; 115; 40; 9-2011; 19676-196851932-7447CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/abs/10.1021/jp112243qinfo:eu-repo/semantics/altIdentifier/doi/10.1021/jp112243qinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-01-14T11:44:47Zoai:ri.conicet.gov.ar:11336/278625instacron: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:34982026-01-14 11:44:48.18CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation
title New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation
spellingShingle New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation
Mendive, Cecilia Beatriz
DEAGGREGATION
TIO2
PHOTOCATALYTIC ACTIVITY
FTIR-ATR
NANOPARTICLES
WATER
title_short New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation
title_full New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation
title_fullStr New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation
title_full_unstemmed New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation
title_sort New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation
dc.creator.none.fl_str_mv Mendive, Cecilia Beatriz
Hansmann, David
Bredow T.
Bahnemann D.
author Mendive, Cecilia Beatriz
author_facet Mendive, Cecilia Beatriz
Hansmann, David
Bredow T.
Bahnemann D.
author_role author
author2 Hansmann, David
Bredow T.
Bahnemann D.
author2_role author
author
author
dc.subject.none.fl_str_mv DEAGGREGATION
TIO2
PHOTOCATALYTIC ACTIVITY
FTIR-ATR
NANOPARTICLES
WATER
topic DEAGGREGATION
TIO2
PHOTOCATALYTIC ACTIVITY
FTIR-ATR
NANOPARTICLES
WATER
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Infrared spectroscopic studies of a UVA irradiated layer of TiO2 nanoparticles in contact with an aqueous solution free of any photocatalytic degradable compound showed that a volume of water is incorporated in the layer. Such a phenomenon is attributed to a mechanism of deaggregation of particles agglomerates resulting from the capacity of the system to use the energy released by recombination of photogenerated electrons and holes. In this mechanism, bonds responsible for maintaining nanoparticles agglomerated are broken, allowing the particles to separate. Water molecules fill the space in between the particles, and it is experimentally evinced by the increase in the band corresponding to the bending mode of water. Under UVA illumination, the TiO2 exposed area thus increases, hence promoting an enhancement of the adsorption capacity of the photocatalyst.
Fil: Mendive, Cecilia Beatriz. Universidad Nacional de Mar del Plata. Facultad de Ciencias Exactas y Naturales. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina
Fil: Hansmann, David. Universitat Bonn; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina
Fil: Bredow T.. Universitat Bonn; Alemania
Fil: Bahnemann D.. Leibniz Universitat Hannover; Alemania
description Infrared spectroscopic studies of a UVA irradiated layer of TiO2 nanoparticles in contact with an aqueous solution free of any photocatalytic degradable compound showed that a volume of water is incorporated in the layer. Such a phenomenon is attributed to a mechanism of deaggregation of particles agglomerates resulting from the capacity of the system to use the energy released by recombination of photogenerated electrons and holes. In this mechanism, bonds responsible for maintaining nanoparticles agglomerated are broken, allowing the particles to separate. Water molecules fill the space in between the particles, and it is experimentally evinced by the increase in the band corresponding to the bending mode of water. Under UVA illumination, the TiO2 exposed area thus increases, hence promoting an enhancement of the adsorption capacity of the photocatalyst.
publishDate 2011
dc.date.none.fl_str_mv 2011-09
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/11336/278625
Mendive, Cecilia Beatriz; Hansmann, David; Bredow T.; Bahnemann D.; New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation; American Chemical Society; Journal of Physical Chemistry C; 115; 40; 9-2011; 19676-19685
1932-7447
CONICET Digital
CONICET
url http://hdl.handle.net/11336/278625
identifier_str_mv Mendive, Cecilia Beatriz; Hansmann, David; Bredow T.; Bahnemann D.; New Insights into the Mechanism of TiO 2 Photocatalysis: Thermal Processes beyond the Electron–Hole Creation; American Chemical Society; Journal of Physical Chemistry C; 115; 40; 9-2011; 19676-19685
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/https://pubs.acs.org/doi/abs/10.1021/jp112243q
info:eu-repo/semantics/altIdentifier/doi/10.1021/jp112243q
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
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_ 1854320829831053312
score 13.113929

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