Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41

Autores
Elías, Verónica Rita; Sabre, Ema V.; Winkler, Elin Lilian; Andrini, Leandro Ruben; Requejo, Felix Gregorio; Casuscelli, Sandra Graciela; Eimer, Griselda Alejandra
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The influence of the environmental humidity on the Cr species deposited on inorganic supports like
MCM-41 silicates was analyzed by UV?vis Diffuse Reflectance (UV?vis RD), Electronic Spin Resonance (ESR) and X-ray near-edge (XANES) spectroscopy. Metal speciation could be inferred, finding that prolonged exposure periods under environmental humidity provoked the reduction of the active Cr6þ species and thus, the decrease of the Cr/MCM-41 photoactivity. After the Ti loading over the Cr modified samples, Cr species and the photoactivity were not notably influenced by the humidity exposure. Thus, it could be concluded that the presence of Ti is important because the TiO2 cover protects the oxidized Cr species, stabilizing them.
Fil: Elías, Verónica Rita. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; Argentina
Fil: Sabre, Ema V.. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; Argentina
Fil: Winkler, Elin Lilian. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Andrini, Leandro Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Requejo, Felix Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Casuscelli, Sandra Graciela. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; Argentina
Fil: Eimer, Griselda Alejandra. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; Argentina
Materia
Photocatalysis
Mcm41
Xanes
Cr
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/7396
Acceder
id CONICETDig_130a0a0cac49b7bb40f27f1c1fb445ce
oai_identifier_str oai:ri.conicet.gov.ar:11336/7396
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41Elías, Verónica RitaSabre, Ema V.Winkler, Elin LilianAndrini, Leandro RubenRequejo, Felix GregorioCasuscelli, Sandra GracielaEimer, Griselda AlejandraPhotocatalysisMcm41XanesCrhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The influence of the environmental humidity on the Cr species deposited on inorganic supports like<br />MCM-41 silicates was analyzed by UV?vis Diffuse Reflectance (UV?vis RD), Electronic Spin Resonance (ESR) and X-ray near-edge (XANES) spectroscopy. Metal speciation could be inferred, finding that prolonged exposure periods under environmental humidity provoked the reduction of the active Cr6þ species and thus, the decrease of the Cr/MCM-41 photoactivity. After the Ti loading over the Cr modified samples, Cr species and the photoactivity were not notably influenced by the humidity exposure. Thus, it could be concluded that the presence of Ti is important because the TiO2 cover protects the oxidized Cr species, stabilizing them.Fil: Elías, Verónica Rita. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; ArgentinaFil: Sabre, Ema V.. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; ArgentinaFil: Winkler, Elin Lilian. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; ArgentinaFil: Andrini, Leandro Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Requejo, Felix Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; ArgentinaFil: Casuscelli, Sandra Graciela. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; ArgentinaFil: Eimer, Griselda Alejandra. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; ArgentinaElsevier2014-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/7396Elías, Verónica Rita; Sabre, Ema V.; Winkler, Elin Lilian; Andrini, Leandro Ruben; Requejo, Felix Gregorio; et al.; Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41; Elsevier; Journal Of Solid State Chemistry; 213; 3-2014; 229-2340022-4596enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S002245961400098Xinfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jssc.2014.03.002info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:47:38Zoai:ri.conicet.gov.ar:11336/7396instacron: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:34982025-09-03 09:47:38.704CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41
title Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41
spellingShingle Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41
Elías, Verónica Rita
Photocatalysis
Mcm41
Xanes
Cr
title_short Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41
title_full Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41
title_fullStr Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41
title_full_unstemmed Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41
title_sort Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41
dc.creator.none.fl_str_mv Elías, Verónica Rita
Sabre, Ema V.
Winkler, Elin Lilian
Andrini, Leandro Ruben
Requejo, Felix Gregorio
Casuscelli, Sandra Graciela
Eimer, Griselda Alejandra
author Elías, Verónica Rita
author_facet Elías, Verónica Rita
Sabre, Ema V.
Winkler, Elin Lilian
Andrini, Leandro Ruben
Requejo, Felix Gregorio
Casuscelli, Sandra Graciela
Eimer, Griselda Alejandra
author_role author
author2 Sabre, Ema V.
Winkler, Elin Lilian
Andrini, Leandro Ruben
Requejo, Felix Gregorio
Casuscelli, Sandra Graciela
Eimer, Griselda Alejandra
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Photocatalysis
Mcm41
Xanes
Cr
topic Photocatalysis
Mcm41
Xanes
Cr
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The influence of the environmental humidity on the Cr species deposited on inorganic supports like<br />MCM-41 silicates was analyzed by UV?vis Diffuse Reflectance (UV?vis RD), Electronic Spin Resonance (ESR) and X-ray near-edge (XANES) spectroscopy. Metal speciation could be inferred, finding that prolonged exposure periods under environmental humidity provoked the reduction of the active Cr6þ species and thus, the decrease of the Cr/MCM-41 photoactivity. After the Ti loading over the Cr modified samples, Cr species and the photoactivity were not notably influenced by the humidity exposure. Thus, it could be concluded that the presence of Ti is important because the TiO2 cover protects the oxidized Cr species, stabilizing them.
Fil: Elías, Verónica Rita. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; Argentina
Fil: Sabre, Ema V.. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; Argentina
Fil: Winkler, Elin Lilian. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
Fil: Andrini, Leandro Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Requejo, Felix Gregorio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico la Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina. Universidad Nacional de La Plata; Argentina
Fil: Casuscelli, Sandra Graciela. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; Argentina
Fil: Eimer, Griselda Alejandra. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Cordoba. Centro de Investigacion y Tecnologia Quimica; Argentina
description The influence of the environmental humidity on the Cr species deposited on inorganic supports like<br />MCM-41 silicates was analyzed by UV?vis Diffuse Reflectance (UV?vis RD), Electronic Spin Resonance (ESR) and X-ray near-edge (XANES) spectroscopy. Metal speciation could be inferred, finding that prolonged exposure periods under environmental humidity provoked the reduction of the active Cr6þ species and thus, the decrease of the Cr/MCM-41 photoactivity. After the Ti loading over the Cr modified samples, Cr species and the photoactivity were not notably influenced by the humidity exposure. Thus, it could be concluded that the presence of Ti is important because the TiO2 cover protects the oxidized Cr species, stabilizing them.
publishDate 2014
dc.date.none.fl_str_mv 2014-03
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/11336/7396
Elías, Verónica Rita; Sabre, Ema V.; Winkler, Elin Lilian; Andrini, Leandro Ruben; Requejo, Felix Gregorio; et al.; Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41; Elsevier; Journal Of Solid State Chemistry; 213; 3-2014; 229-234
0022-4596
url http://hdl.handle.net/11336/7396
identifier_str_mv Elías, Verónica Rita; Sabre, Ema V.; Winkler, Elin Lilian; Andrini, Leandro Ruben; Requejo, Felix Gregorio; et al.; Influence of the hydration by the environmental humidity on the metallic speciation and the photocatalytic activity of Cr/MCM-41; Elsevier; Journal Of Solid State Chemistry; 213; 3-2014; 229-234
0022-4596
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S002245961400098X
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jssc.2014.03.002
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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_ 1842268872717107200
score 13.13397

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