Photocatalytic degradation of DNOC in aqueous TiO2 dispersions

Autores
Fabbri, D.; Villata, L.S.; Prevot, A. Bianco; Capparelli, Alberto Luis; Pramauro, E.
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The photocatalytic transformation of the pesticide DNOC (4,6-dinitro-o-cresol) over irradiated TiO2 suspensions was investigated in aerated aqueous solutions. Complete and relatively fast substrate degradation was achieved after irradiation with simulated solar light, being the reaction rate dependent on the initial pH. The slower evolution of the mineralization process, which can be accomplished after longer irradiation times, was evidenced.by monitoring the dissolved organic carbon decrease and the formation of nitrogen inorganic products Both the analysis of the reaction end-products and the HPLC-MS characterization of the organic intermediates are consistent with a reaction mechanism where the hydroxylation of the aromatic ring and the oxidation of the methyl group can play a major role as initial reaction steps and occurr at comparable rates. The direct reduction of nitrogroups at the semiconductor surface to form ammonium ion, inferred from the MS analysis of minor aromatic intermediates, appears to be another viable reaction path. The nearly quantitative mineralization of the pesticide has been observed after long term (3 hours) irradiation, time after which no aromatic products were detected.
Fil: Fabbri, D.. Università di Torino; Italia
Fil: Villata, L.S.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Prevot, A. Bianco. Università di Torino; Italia
Fil: Capparelli, Alberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Pramauro, E.. Università di Torino; Italia
Materia
Photocatalysis
DNOC
Intermediates
Degradation mechanism
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:11336/279539
Acceder
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network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Photocatalytic degradation of DNOC in aqueous TiO2 dispersionsFabbri, D.Villata, L.S.Prevot, A. BiancoCapparelli, Alberto LuisPramauro, E.PhotocatalysisDNOCIntermediatesDegradation mechanismhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1The photocatalytic transformation of the pesticide DNOC (4,6-dinitro-o-cresol) over irradiated TiO2 suspensions was investigated in aerated aqueous solutions. Complete and relatively fast substrate degradation was achieved after irradiation with simulated solar light, being the reaction rate dependent on the initial pH. The slower evolution of the mineralization process, which can be accomplished after longer irradiation times, was evidenced.by monitoring the dissolved organic carbon decrease and the formation of nitrogen inorganic products Both the analysis of the reaction end-products and the HPLC-MS characterization of the organic intermediates are consistent with a reaction mechanism where the hydroxylation of the aromatic ring and the oxidation of the methyl group can play a major role as initial reaction steps and occurr at comparable rates. The direct reduction of nitrogroups at the semiconductor surface to form ammonium ion, inferred from the MS analysis of minor aromatic intermediates, appears to be another viable reaction path. The nearly quantitative mineralization of the pesticide has been observed after long term (3 hours) irradiation, time after which no aromatic products were detected.Fil: Fabbri, D.. Università di Torino; ItaliaFil: Villata, L.S.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Prevot, A. Bianco. Università di Torino; ItaliaFil: Capparelli, Alberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; ArgentinaFil: Pramauro, E.. Università di Torino; ItaliaElsevier Science SA2006-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/279539Fabbri, D.; Villata, L.S.; Prevot, A. Bianco; Capparelli, Alberto Luis; Pramauro, E.; Photocatalytic degradation of DNOC in aqueous TiO2 dispersions; Elsevier Science SA; Journal of Photochemistry and Photobiology A: Chemistry; 180; 1-2; 12-2006; 157-1641010-6030CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S1010603005004958info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jphotochem.2005.10.009info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-06T12:54:34Zoai:ri.conicet.gov.ar:11336/279539instacron: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:34982026-02-06 12:54:34.829CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Photocatalytic degradation of DNOC in aqueous TiO2 dispersions
title Photocatalytic degradation of DNOC in aqueous TiO2 dispersions
spellingShingle Photocatalytic degradation of DNOC in aqueous TiO2 dispersions
Fabbri, D.
Photocatalysis
DNOC
Intermediates
Degradation mechanism
title_short Photocatalytic degradation of DNOC in aqueous TiO2 dispersions
title_full Photocatalytic degradation of DNOC in aqueous TiO2 dispersions
title_fullStr Photocatalytic degradation of DNOC in aqueous TiO2 dispersions
title_full_unstemmed Photocatalytic degradation of DNOC in aqueous TiO2 dispersions
title_sort Photocatalytic degradation of DNOC in aqueous TiO2 dispersions
dc.creator.none.fl_str_mv Fabbri, D.
Villata, L.S.
Prevot, A. Bianco
Capparelli, Alberto Luis
Pramauro, E.
author Fabbri, D.
author_facet Fabbri, D.
Villata, L.S.
Prevot, A. Bianco
Capparelli, Alberto Luis
Pramauro, E.
author_role author
author2 Villata, L.S.
Prevot, A. Bianco
Capparelli, Alberto Luis
Pramauro, E.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Photocatalysis
DNOC
Intermediates
Degradation mechanism
topic Photocatalysis
DNOC
Intermediates
Degradation mechanism
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 photocatalytic transformation of the pesticide DNOC (4,6-dinitro-o-cresol) over irradiated TiO2 suspensions was investigated in aerated aqueous solutions. Complete and relatively fast substrate degradation was achieved after irradiation with simulated solar light, being the reaction rate dependent on the initial pH. The slower evolution of the mineralization process, which can be accomplished after longer irradiation times, was evidenced.by monitoring the dissolved organic carbon decrease and the formation of nitrogen inorganic products Both the analysis of the reaction end-products and the HPLC-MS characterization of the organic intermediates are consistent with a reaction mechanism where the hydroxylation of the aromatic ring and the oxidation of the methyl group can play a major role as initial reaction steps and occurr at comparable rates. The direct reduction of nitrogroups at the semiconductor surface to form ammonium ion, inferred from the MS analysis of minor aromatic intermediates, appears to be another viable reaction path. The nearly quantitative mineralization of the pesticide has been observed after long term (3 hours) irradiation, time after which no aromatic products were detected.
Fil: Fabbri, D.. Università di Torino; Italia
Fil: Villata, L.S.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Prevot, A. Bianco. Università di Torino; Italia
Fil: Capparelli, Alberto Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
Fil: Pramauro, E.. Università di Torino; Italia
description The photocatalytic transformation of the pesticide DNOC (4,6-dinitro-o-cresol) over irradiated TiO2 suspensions was investigated in aerated aqueous solutions. Complete and relatively fast substrate degradation was achieved after irradiation with simulated solar light, being the reaction rate dependent on the initial pH. The slower evolution of the mineralization process, which can be accomplished after longer irradiation times, was evidenced.by monitoring the dissolved organic carbon decrease and the formation of nitrogen inorganic products Both the analysis of the reaction end-products and the HPLC-MS characterization of the organic intermediates are consistent with a reaction mechanism where the hydroxylation of the aromatic ring and the oxidation of the methyl group can play a major role as initial reaction steps and occurr at comparable rates. The direct reduction of nitrogroups at the semiconductor surface to form ammonium ion, inferred from the MS analysis of minor aromatic intermediates, appears to be another viable reaction path. The nearly quantitative mineralization of the pesticide has been observed after long term (3 hours) irradiation, time after which no aromatic products were detected.
publishDate 2006
dc.date.none.fl_str_mv 2006-12
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/11336/279539
Fabbri, D.; Villata, L.S.; Prevot, A. Bianco; Capparelli, Alberto Luis; Pramauro, E.; Photocatalytic degradation of DNOC in aqueous TiO2 dispersions; Elsevier Science SA; Journal of Photochemistry and Photobiology A: Chemistry; 180; 1-2; 12-2006; 157-164
1010-6030
CONICET Digital
CONICET
url http://hdl.handle.net/11336/279539
identifier_str_mv Fabbri, D.; Villata, L.S.; Prevot, A. Bianco; Capparelli, Alberto Luis; Pramauro, E.; Photocatalytic degradation of DNOC in aqueous TiO2 dispersions; Elsevier Science SA; Journal of Photochemistry and Photobiology A: Chemistry; 180; 1-2; 12-2006; 157-164
1010-6030
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/abs/pii/S1010603005004958
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jphotochem.2005.10.009
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
dc.publisher.none.fl_str_mv Elsevier Science SA
publisher.none.fl_str_mv Elsevier Science SA
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 13.106097

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