Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations

Autores
Oliveira, Luiz C. A.; Ramalho, Teodorico C.; Gonçalves, Maraísa; Cereda, Flávia; Carvalho, Kele T.; Nazzarro, Marcelo Sandro; Sapag, Manuel Karim
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work, synthetic and natural niobium oxide (niobia), were used to promote the oxidation of methylene blue dye. The samples were characterized by XRD, XPS and FTIR measurements. The presence of reactive species on the surface of the samples strongly increases the oxidation rate of the methylene blue dye. The reaction mechanism was studied by ESI-MS analyses. Moreover, kinetic data and XPS spectroscopy suggest that the oxidation of the organic dye involves oxidizing species mainly generated after previous treatment with H2O2. The results also showed that the oxidation takes place by a homolytic mechanism via radical intermediates.
Fil: Oliveira, Luiz C. A.. Universidad Federal de Lavras; Brasil
Fil: Ramalho, Teodorico C.. Universidad Federal de Lavras; Brasil
Fil: Gonçalves, Maraísa. Universidad Federal de Lavras; Brasil
Fil: Cereda, Flávia. Universidad Federal de Lavras; Brasil
Fil: Carvalho, Kele T.. Universidad Federal de Lavras; Brasil
Fil: Nazzarro, Marcelo Sandro. Universidad Nacional de San Luis. Facultad de Ciencias Fisico Matematicas y Naturales. Departamento de Fisica. Laboratorio de Ciencias de Superficies y Medios Porosos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; Argentina
Fil: Sapag, Manuel Karim. Universidad Nacional de San Luis. Facultad de Ciencias Fisico Matematicas y Naturales. Departamento de Fisica. Laboratorio de Ciencias de Superficies y Medios Porosos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; Argentina
Materia
niobia
catalyst
ESI-MS
theoretical calculations
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:11336/214215
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculationsOliveira, Luiz C. A.Ramalho, Teodorico C.Gonçalves, MaraísaCereda, FláviaCarvalho, Kele T.Nazzarro, Marcelo SandroSapag, Manuel KarimniobiacatalystESI-MStheoretical calculationshttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2In this work, synthetic and natural niobium oxide (niobia), were used to promote the oxidation of methylene blue dye. The samples were characterized by XRD, XPS and FTIR measurements. The presence of reactive species on the surface of the samples strongly increases the oxidation rate of the methylene blue dye. The reaction mechanism was studied by ESI-MS analyses. Moreover, kinetic data and XPS spectroscopy suggest that the oxidation of the organic dye involves oxidizing species mainly generated after previous treatment with H2O2. The results also showed that the oxidation takes place by a homolytic mechanism via radical intermediates.Fil: Oliveira, Luiz C. A.. Universidad Federal de Lavras; BrasilFil: Ramalho, Teodorico C.. Universidad Federal de Lavras; BrasilFil: Gonçalves, Maraísa. Universidad Federal de Lavras; BrasilFil: Cereda, Flávia. Universidad Federal de Lavras; BrasilFil: Carvalho, Kele T.. Universidad Federal de Lavras; BrasilFil: Nazzarro, Marcelo Sandro. Universidad Nacional de San Luis. Facultad de Ciencias Fisico Matematicas y Naturales. Departamento de Fisica. Laboratorio de Ciencias de Superficies y Medios Porosos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; ArgentinaFil: Sapag, Manuel Karim. Universidad Nacional de San Luis. Facultad de Ciencias Fisico Matematicas y Naturales. Departamento de Fisica. Laboratorio de Ciencias de Superficies y Medios Porosos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; ArgentinaElsevier Science2007-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/214215Oliveira, Luiz C. A.; Ramalho, Teodorico C.; Gonçalves, Maraísa; Cereda, Flávia; Carvalho, Kele T.; et al.; Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations; Elsevier Science; Chemical Physics Letters; 446; 1-3; 12-2007; 133-1370009-2614CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.cplett.2007.08.037info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0009261407011098info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-15T14:41:11Zoai:ri.conicet.gov.ar:11336/214215instacron: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 14:41:11.443CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations
title Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations
spellingShingle Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations
Oliveira, Luiz C. A.
niobia
catalyst
ESI-MS
theoretical calculations
title_short Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations
title_full Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations
title_fullStr Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations
title_full_unstemmed Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations
title_sort Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations
dc.creator.none.fl_str_mv Oliveira, Luiz C. A.
Ramalho, Teodorico C.
Gonçalves, Maraísa
Cereda, Flávia
Carvalho, Kele T.
Nazzarro, Marcelo Sandro
Sapag, Manuel Karim
author Oliveira, Luiz C. A.
author_facet Oliveira, Luiz C. A.
Ramalho, Teodorico C.
Gonçalves, Maraísa
Cereda, Flávia
Carvalho, Kele T.
Nazzarro, Marcelo Sandro
Sapag, Manuel Karim
author_role author
author2 Ramalho, Teodorico C.
Gonçalves, Maraísa
Cereda, Flávia
Carvalho, Kele T.
Nazzarro, Marcelo Sandro
Sapag, Manuel Karim
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv niobia
catalyst
ESI-MS
theoretical calculations
topic niobia
catalyst
ESI-MS
theoretical calculations
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv In this work, synthetic and natural niobium oxide (niobia), were used to promote the oxidation of methylene blue dye. The samples were characterized by XRD, XPS and FTIR measurements. The presence of reactive species on the surface of the samples strongly increases the oxidation rate of the methylene blue dye. The reaction mechanism was studied by ESI-MS analyses. Moreover, kinetic data and XPS spectroscopy suggest that the oxidation of the organic dye involves oxidizing species mainly generated after previous treatment with H2O2. The results also showed that the oxidation takes place by a homolytic mechanism via radical intermediates.
Fil: Oliveira, Luiz C. A.. Universidad Federal de Lavras; Brasil
Fil: Ramalho, Teodorico C.. Universidad Federal de Lavras; Brasil
Fil: Gonçalves, Maraísa. Universidad Federal de Lavras; Brasil
Fil: Cereda, Flávia. Universidad Federal de Lavras; Brasil
Fil: Carvalho, Kele T.. Universidad Federal de Lavras; Brasil
Fil: Nazzarro, Marcelo Sandro. Universidad Nacional de San Luis. Facultad de Ciencias Fisico Matematicas y Naturales. Departamento de Fisica. Laboratorio de Ciencias de Superficies y Medios Porosos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; Argentina
Fil: Sapag, Manuel Karim. Universidad Nacional de San Luis. Facultad de Ciencias Fisico Matematicas y Naturales. Departamento de Fisica. Laboratorio de Ciencias de Superficies y Medios Porosos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis; Argentina
description In this work, synthetic and natural niobium oxide (niobia), were used to promote the oxidation of methylene blue dye. The samples were characterized by XRD, XPS and FTIR measurements. The presence of reactive species on the surface of the samples strongly increases the oxidation rate of the methylene blue dye. The reaction mechanism was studied by ESI-MS analyses. Moreover, kinetic data and XPS spectroscopy suggest that the oxidation of the organic dye involves oxidizing species mainly generated after previous treatment with H2O2. The results also showed that the oxidation takes place by a homolytic mechanism via radical intermediates.
publishDate 2007
dc.date.none.fl_str_mv 2007-12
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/11336/214215
Oliveira, Luiz C. A.; Ramalho, Teodorico C.; Gonçalves, Maraísa; Cereda, Flávia; Carvalho, Kele T.; et al.; Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations; Elsevier Science; Chemical Physics Letters; 446; 1-3; 12-2007; 133-137
0009-2614
CONICET Digital
CONICET
url http://hdl.handle.net/11336/214215
identifier_str_mv Oliveira, Luiz C. A.; Ramalho, Teodorico C.; Gonçalves, Maraísa; Cereda, Flávia; Carvalho, Kele T.; et al.; Pure niobia as catalyst for the oxidation of organic contaminants: Mechanism study via ESI-MS and theoretical calculations; Elsevier Science; Chemical Physics Letters; 446; 1-3; 12-2007; 133-137
0009-2614
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.cplett.2007.08.037
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0009261407011098
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
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
_version_ 1846082907268972544
score 13.22299

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