Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigati...

Autores
Elías, Verónica Rita; Sabre, Ema Virginia; Winkler, Elin Lilian; Satuf, María Lucila; Rodriguez Castellón, Enrique; Casuscelli, Sandra Graciela; Eimer, Griselda Alejandra
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Cr/MCM-41 and TiO2/Cr/MCM-41 mesoporous silica were synthesized by the wet impregnation method.Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS) and Electron Spin Resonance (ESR) techniques were employed for the nanocatalysts characterization and a comparison with previously reported results of UV?Vis diffuse reflectance spectroscopy (UV?vis DR), X-ray Diffraction (XRD) and N2 adsorption/desorption analysis was carried out. It could be confirmed that the lower Cr loadings in the samples result in the increased presence of highly dispersed oxidized Cr species, which allows the desired heterojunction effect after the Ti loading and the high catalytic activity in the Acid Orange 7 (AO7) degradation. In this work, the analysis of the AO7 degradation progress by UV?vis and FT-IR spectroscopy has been made using the TiO2/Cr/MCM-41(3.5) as photocatalyst, under visible and UV?vis radiation. Short irradiation times resulted in a high degradation of the azo and naphthalene groups present in the AO7 dye. At longer irradiation times, when total discoloration of AO7 solution is obtained (>97%), the biodegradability index (BOD5/COD) reaches values greater than 0.40. This photocatalytic process could be used as a pre-treatment step before conventional Biological treatment.
Fil: Elías, Verónica Rita. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Fil: Sabre, Ema Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Fil: Winkler, Elin Lilian. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Satuf, María Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Rodriguez Castellón, Enrique. Universidad de Málaga. Facultad de Ciencias; España
Fil: Casuscelli, Sandra Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Fil: Eimer, Griselda Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Materia
AZO-DYES
PHOTOBLEACHING
BIODEGRADABILITY
MCM-41
METALLIC SPECIES
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:11336/245378
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/245378
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigationElías, Verónica RitaSabre, Ema VirginiaWinkler, Elin LilianSatuf, María LucilaRodriguez Castellón, EnriqueCasuscelli, Sandra GracielaEimer, Griselda AlejandraAZO-DYESPHOTOBLEACHINGBIODEGRADABILITYMCM-41METALLIC SPECIEShttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2Cr/MCM-41 and TiO2/Cr/MCM-41 mesoporous silica were synthesized by the wet impregnation method.Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS) and Electron Spin Resonance (ESR) techniques were employed for the nanocatalysts characterization and a comparison with previously reported results of UV?Vis diffuse reflectance spectroscopy (UV?vis DR), X-ray Diffraction (XRD) and N2 adsorption/desorption analysis was carried out. It could be confirmed that the lower Cr loadings in the samples result in the increased presence of highly dispersed oxidized Cr species, which allows the desired heterojunction effect after the Ti loading and the high catalytic activity in the Acid Orange 7 (AO7) degradation. In this work, the analysis of the AO7 degradation progress by UV?vis and FT-IR spectroscopy has been made using the TiO2/Cr/MCM-41(3.5) as photocatalyst, under visible and UV?vis radiation. Short irradiation times resulted in a high degradation of the azo and naphthalene groups present in the AO7 dye. At longer irradiation times, when total discoloration of AO7 solution is obtained (>97%), the biodegradability index (BOD5/COD) reaches values greater than 0.40. This photocatalytic process could be used as a pre-treatment step before conventional Biological treatment.Fil: Elías, Verónica Rita. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; ArgentinaFil: Sabre, Ema Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; ArgentinaFil: Winkler, Elin Lilian. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Satuf, María Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Rodriguez Castellón, Enrique. Universidad de Málaga. Facultad de Ciencias; EspañaFil: Casuscelli, Sandra Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; ArgentinaFil: Eimer, Griselda Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; ArgentinaElsevier Science2012-11info: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/pdfhttp://hdl.handle.net/11336/245378Elías, Verónica Rita; Sabre, Ema Virginia; Winkler, Elin Lilian; Satuf, María Lucila; Rodriguez Castellón, Enrique; et al.; Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigation; Elsevier Science; Microporous and Mesoporous Materials; 163; 11-2012; 85-951387-1811CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S1387181112003976info:eu-repo/semantics/altIdentifier/doi/10.1016/j.micromeso.2012.06.043info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:08:55Zoai:ri.conicet.gov.ar:11336/245378instacron: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 10:08:55.697CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigation
title Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigation
spellingShingle Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigation
Elías, Verónica Rita
AZO-DYES
PHOTOBLEACHING
BIODEGRADABILITY
MCM-41
METALLIC SPECIES
title_short Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigation
title_full Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigation
title_fullStr Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigation
title_full_unstemmed Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigation
title_sort Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigation
dc.creator.none.fl_str_mv Elías, Verónica Rita
Sabre, Ema Virginia
Winkler, Elin Lilian
Satuf, María Lucila
Rodriguez Castellón, Enrique
Casuscelli, Sandra Graciela
Eimer, Griselda Alejandra
author Elías, Verónica Rita
author_facet Elías, Verónica Rita
Sabre, Ema Virginia
Winkler, Elin Lilian
Satuf, María Lucila
Rodriguez Castellón, Enrique
Casuscelli, Sandra Graciela
Eimer, Griselda Alejandra
author_role author
author2 Sabre, Ema Virginia
Winkler, Elin Lilian
Satuf, María Lucila
Rodriguez Castellón, Enrique
Casuscelli, Sandra Graciela
Eimer, Griselda Alejandra
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv AZO-DYES
PHOTOBLEACHING
BIODEGRADABILITY
MCM-41
METALLIC SPECIES
topic AZO-DYES
PHOTOBLEACHING
BIODEGRADABILITY
MCM-41
METALLIC SPECIES
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Cr/MCM-41 and TiO2/Cr/MCM-41 mesoporous silica were synthesized by the wet impregnation method.Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS) and Electron Spin Resonance (ESR) techniques were employed for the nanocatalysts characterization and a comparison with previously reported results of UV?Vis diffuse reflectance spectroscopy (UV?vis DR), X-ray Diffraction (XRD) and N2 adsorption/desorption analysis was carried out. It could be confirmed that the lower Cr loadings in the samples result in the increased presence of highly dispersed oxidized Cr species, which allows the desired heterojunction effect after the Ti loading and the high catalytic activity in the Acid Orange 7 (AO7) degradation. In this work, the analysis of the AO7 degradation progress by UV?vis and FT-IR spectroscopy has been made using the TiO2/Cr/MCM-41(3.5) as photocatalyst, under visible and UV?vis radiation. Short irradiation times resulted in a high degradation of the azo and naphthalene groups present in the AO7 dye. At longer irradiation times, when total discoloration of AO7 solution is obtained (>97%), the biodegradability index (BOD5/COD) reaches values greater than 0.40. This photocatalytic process could be used as a pre-treatment step before conventional Biological treatment.
Fil: Elías, Verónica Rita. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Fil: Sabre, Ema Virginia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Fil: Winkler, Elin Lilian. Comisión Nacional de Energía Atómica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Satuf, María Lucila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; Argentina
Fil: Rodriguez Castellón, Enrique. Universidad de Málaga. Facultad de Ciencias; España
Fil: Casuscelli, Sandra Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
Fil: Eimer, Griselda Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Centro de Investigación y Tecnología Química. Universidad Tecnológica Nacional. Facultad Regional Córdoba. Centro de Investigación y Tecnología Química; Argentina
description Cr/MCM-41 and TiO2/Cr/MCM-41 mesoporous silica were synthesized by the wet impregnation method.Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS) and Electron Spin Resonance (ESR) techniques were employed for the nanocatalysts characterization and a comparison with previously reported results of UV?Vis diffuse reflectance spectroscopy (UV?vis DR), X-ray Diffraction (XRD) and N2 adsorption/desorption analysis was carried out. It could be confirmed that the lower Cr loadings in the samples result in the increased presence of highly dispersed oxidized Cr species, which allows the desired heterojunction effect after the Ti loading and the high catalytic activity in the Acid Orange 7 (AO7) degradation. In this work, the analysis of the AO7 degradation progress by UV?vis and FT-IR spectroscopy has been made using the TiO2/Cr/MCM-41(3.5) as photocatalyst, under visible and UV?vis radiation. Short irradiation times resulted in a high degradation of the azo and naphthalene groups present in the AO7 dye. At longer irradiation times, when total discoloration of AO7 solution is obtained (>97%), the biodegradability index (BOD5/COD) reaches values greater than 0.40. This photocatalytic process could be used as a pre-treatment step before conventional Biological treatment.
publishDate 2012
dc.date.none.fl_str_mv 2012-11
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/11336/245378
Elías, Verónica Rita; Sabre, Ema Virginia; Winkler, Elin Lilian; Satuf, María Lucila; Rodriguez Castellón, Enrique; et al.; Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigation; Elsevier Science; Microporous and Mesoporous Materials; 163; 11-2012; 85-95
1387-1811
CONICET Digital
CONICET
url http://hdl.handle.net/11336/245378
identifier_str_mv Elías, Verónica Rita; Sabre, Ema Virginia; Winkler, Elin Lilian; Satuf, María Lucila; Rodriguez Castellón, Enrique; et al.; Chromium and titanium/chromium-containing MCM-41 mesoporous silicates as promising catalysts for the photobleaching of azo dyes in aqueous suspensions. A multitechnique investigation; Elsevier Science; Microporous and Mesoporous Materials; 163; 11-2012; 85-95
1387-1811
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://www.sciencedirect.com/science/article/pii/S1387181112003976
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.micromeso.2012.06.043
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
application/pdf
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dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
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
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score 13.13397

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