A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms

Autores
Oliveira, L. C. A.; Gonçalves, M.; Guerreiro, M. C.; Ramalho, T. C.; Fabris, J. D.; Pereira, M. C.; Sapag, Manuel Karim
Año de publicación
2007
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The present work describes the preparation of novel materials based on niobia (Nb2O5)/iron oxides and their use as catalyst on oxidizing reactions of organic compounds in aqueous medium with hydrogen peroxide. These new composites were prepared by mixing natural niobia and iron oxides and were characterized with powder X-ray diffraction (XRD), chemical analyses, scanning electron microscopy (SEM), and 57Fe Mössbauer spectroscopy. Results showed that the main iron oxides so formed were goethite (αFeOOH) and maghemite (γFe2O3) with small particle sizes. The decomposition study was realized with a basic dye as a model molecule: the methylene blue. The analysis of the products, with electrospray ionization mass spectrometry (ESI-MS), showed that the methylene blue was successively oxidized (hydrolyzed) through different intermediate species. These results strongly suggest that highly reactive hydroxyl radicals generated from the H2O2 on the surface of the 1:1 niobia:iron oxide composite act as an efficient heterogeneous Fenton catalyst.
Fil: Oliveira, L. C. A.. Universidade Federal de Lavras. Departamento de Química; Brasil
Fil: Gonçalves, M.. Universidade Federal de Lavras. Departamento de Química; Brasil
Fil: Guerreiro, M. C.. Universidade Federal de Lavras. Departamento de Química; Brasil
Fil: Ramalho, T. C.. Universidade Federal de Lavras. Departamento de Química; Brasil
Fil: Fabris, J. D.. Universidade Federal de Minas Gerais. Departamento de Química; Brasil
Fil: Pereira, M. C.. Universidade Federal de Minas Gerais. Departamento de Química; Brasil
Fil: Sapag, Manuel Karim. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina
Materia
HETEROGENEOUS FENTON
HYDROGEN PEROXIDE
IRON OXIDES
OXIDATION
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:11336/117207
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/117207
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanismsOliveira, L. C. A.Gonçalves, M.Guerreiro, M. C.Ramalho, T. C.Fabris, J. D.Pereira, M. C.Sapag, Manuel KarimHETEROGENEOUS FENTONHYDROGEN PEROXIDEIRON OXIDESOXIDATIONhttps://purl.org/becyt/ford/2.4https://purl.org/becyt/ford/2The present work describes the preparation of novel materials based on niobia (Nb2O5)/iron oxides and their use as catalyst on oxidizing reactions of organic compounds in aqueous medium with hydrogen peroxide. These new composites were prepared by mixing natural niobia and iron oxides and were characterized with powder X-ray diffraction (XRD), chemical analyses, scanning electron microscopy (SEM), and 57Fe Mössbauer spectroscopy. Results showed that the main iron oxides so formed were goethite (αFeOOH) and maghemite (γFe2O3) with small particle sizes. The decomposition study was realized with a basic dye as a model molecule: the methylene blue. The analysis of the products, with electrospray ionization mass spectrometry (ESI-MS), showed that the methylene blue was successively oxidized (hydrolyzed) through different intermediate species. These results strongly suggest that highly reactive hydroxyl radicals generated from the H2O2 on the surface of the 1:1 niobia:iron oxide composite act as an efficient heterogeneous Fenton catalyst.Fil: Oliveira, L. C. A.. Universidade Federal de Lavras. Departamento de Química; BrasilFil: Gonçalves, M.. Universidade Federal de Lavras. Departamento de Química; BrasilFil: Guerreiro, M. C.. Universidade Federal de Lavras. Departamento de Química; BrasilFil: Ramalho, T. C.. Universidade Federal de Lavras. Departamento de Química; BrasilFil: Fabris, J. D.. Universidade Federal de Minas Gerais. Departamento de Química; BrasilFil: Pereira, M. C.. Universidade Federal de Minas Gerais. Departamento de Química; BrasilFil: Sapag, Manuel Karim. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; ArgentinaElsevier Science2007-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/117207Oliveira, L. C. A.; Gonçalves, M.; Guerreiro, M. C.; Ramalho, T. C.; Fabris, J. D.; et al.; A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms; Elsevier Science; Applied Catalysis A: General; 316; 1; 1-2007; 117-1240926-860XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.apcata.2006.09.027info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0926860X06007009info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:54:51Zoai:ri.conicet.gov.ar:11336/117207instacron: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 09:54:51.674CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms
title A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms
spellingShingle A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms
Oliveira, L. C. A.
HETEROGENEOUS FENTON
HYDROGEN PEROXIDE
IRON OXIDES
OXIDATION
title_short A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms
title_full A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms
title_fullStr A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms
title_full_unstemmed A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms
title_sort A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms
dc.creator.none.fl_str_mv Oliveira, L. C. A.
Gonçalves, M.
Guerreiro, M. C.
Ramalho, T. C.
Fabris, J. D.
Pereira, M. C.
Sapag, Manuel Karim
author Oliveira, L. C. A.
author_facet Oliveira, L. C. A.
Gonçalves, M.
Guerreiro, M. C.
Ramalho, T. C.
Fabris, J. D.
Pereira, M. C.
Sapag, Manuel Karim
author_role author
author2 Gonçalves, M.
Guerreiro, M. C.
Ramalho, T. C.
Fabris, J. D.
Pereira, M. C.
Sapag, Manuel Karim
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv HETEROGENEOUS FENTON
HYDROGEN PEROXIDE
IRON OXIDES
OXIDATION
topic HETEROGENEOUS FENTON
HYDROGEN PEROXIDE
IRON OXIDES
OXIDATION
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.4
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv The present work describes the preparation of novel materials based on niobia (Nb2O5)/iron oxides and their use as catalyst on oxidizing reactions of organic compounds in aqueous medium with hydrogen peroxide. These new composites were prepared by mixing natural niobia and iron oxides and were characterized with powder X-ray diffraction (XRD), chemical analyses, scanning electron microscopy (SEM), and 57Fe Mössbauer spectroscopy. Results showed that the main iron oxides so formed were goethite (αFeOOH) and maghemite (γFe2O3) with small particle sizes. The decomposition study was realized with a basic dye as a model molecule: the methylene blue. The analysis of the products, with electrospray ionization mass spectrometry (ESI-MS), showed that the methylene blue was successively oxidized (hydrolyzed) through different intermediate species. These results strongly suggest that highly reactive hydroxyl radicals generated from the H2O2 on the surface of the 1:1 niobia:iron oxide composite act as an efficient heterogeneous Fenton catalyst.
Fil: Oliveira, L. C. A.. Universidade Federal de Lavras. Departamento de Química; Brasil
Fil: Gonçalves, M.. Universidade Federal de Lavras. Departamento de Química; Brasil
Fil: Guerreiro, M. C.. Universidade Federal de Lavras. Departamento de Química; Brasil
Fil: Ramalho, T. C.. Universidade Federal de Lavras. Departamento de Química; Brasil
Fil: Fabris, J. D.. Universidade Federal de Minas Gerais. Departamento de Química; Brasil
Fil: Pereira, M. C.. Universidade Federal de Minas Gerais. Departamento de Química; Brasil
Fil: Sapag, Manuel Karim. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina
description The present work describes the preparation of novel materials based on niobia (Nb2O5)/iron oxides and their use as catalyst on oxidizing reactions of organic compounds in aqueous medium with hydrogen peroxide. These new composites were prepared by mixing natural niobia and iron oxides and were characterized with powder X-ray diffraction (XRD), chemical analyses, scanning electron microscopy (SEM), and 57Fe Mössbauer spectroscopy. Results showed that the main iron oxides so formed were goethite (αFeOOH) and maghemite (γFe2O3) with small particle sizes. The decomposition study was realized with a basic dye as a model molecule: the methylene blue. The analysis of the products, with electrospray ionization mass spectrometry (ESI-MS), showed that the methylene blue was successively oxidized (hydrolyzed) through different intermediate species. These results strongly suggest that highly reactive hydroxyl radicals generated from the H2O2 on the surface of the 1:1 niobia:iron oxide composite act as an efficient heterogeneous Fenton catalyst.
publishDate 2007
dc.date.none.fl_str_mv 2007-01
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/11336/117207
Oliveira, L. C. A.; Gonçalves, M.; Guerreiro, M. C.; Ramalho, T. C.; Fabris, J. D.; et al.; A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms; Elsevier Science; Applied Catalysis A: General; 316; 1; 1-2007; 117-124
0926-860X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/117207
identifier_str_mv Oliveira, L. C. A.; Gonçalves, M.; Guerreiro, M. C.; Ramalho, T. C.; Fabris, J. D.; et al.; A new catalyst material based on niobia/iron oxide composite on the oxidation of organic contaminants in water via heterogeneous Fenton mechanisms; Elsevier Science; Applied Catalysis A: General; 316; 1; 1-2007; 117-124
0926-860X
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.apcata.2006.09.027
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0926860X06007009
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_ 1842269311045992448
score 13.13397

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