Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media

Autores
Schlichter, Sofia; Rocha, Marian; Peixoto, Andreia F.; Pires, João; Freire, Cristina; Alvarez, Mariana
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Two mesoporous-based catalysts with different nominal copper loads (10 and 24% w/w) were prepared from impregnation of the MCM-41 support with copper acetylacetonate: Cu/MCM-41-10 and Cu/MCM-41-24, respectively. Samples with a metallic charge similar to the nominal content were obtained and the mesoporous structure was retained after the impregnation. X-ray diffractograms evidenced the presence of CuO in the catalyst with the higher metal loading. The catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in aqueous medium, with an excess of NaBH4, was chosen as a model reaction to evaluate the catalytic activity of the Cu/MCM-41-10 and Cu/MCM-41-24 catalysts. The 4-NP concentrations at prefixed intervals were monitored using UV–Vis spectroscopy. The Cu-based catalysts led to almost 100% reduction of 4-NP to 4-AP, with the reaction time of 30 and 50 s, for Cu/MCM-41-10 and Cu/MCM-41-24 respectively. The reaction follows a pseudo-first order law, with a rate constant of 0.374 and 0.109 s−1 for Cu/MCM-41-10 and Cu/MCM-41-24, respectively. Both catalysts were stable and could be reused up to ten times in consecutive runs without any treatment between the cycles. The catalytic activity was retained without loss of efficiency, indicating the high stability of the MCM-41 based catalysts under the reaction conditions.
Fil: Schlichter, Sofia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Rocha, Marian. Universidad de Porto; Portugal
Fil: Peixoto, Andreia F.. Universidad de Porto; Portugal
Fil: Pires, João. Universidade de Lisboa; Portugal
Fil: Freire, Cristina. Universidad de Porto; Portugal
Fil: Alvarez, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Materia
4-NITROPHENOL REDUCTION
COPPER CATALYSTS
MCM-41
MESOPOROUS MATERIALS
NABH4
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:11336/87425
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/87425
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous mediaSchlichter, SofiaRocha, MarianPeixoto, Andreia F.Pires, JoãoFreire, CristinaAlvarez, Mariana4-NITROPHENOL REDUCTIONCOPPER CATALYSTSMCM-41MESOPOROUS MATERIALSNABH4https://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Two mesoporous-based catalysts with different nominal copper loads (10 and 24% w/w) were prepared from impregnation of the MCM-41 support with copper acetylacetonate: Cu/MCM-41-10 and Cu/MCM-41-24, respectively. Samples with a metallic charge similar to the nominal content were obtained and the mesoporous structure was retained after the impregnation. X-ray diffractograms evidenced the presence of CuO in the catalyst with the higher metal loading. The catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in aqueous medium, with an excess of NaBH4, was chosen as a model reaction to evaluate the catalytic activity of the Cu/MCM-41-10 and Cu/MCM-41-24 catalysts. The 4-NP concentrations at prefixed intervals were monitored using UV–Vis spectroscopy. The Cu-based catalysts led to almost 100% reduction of 4-NP to 4-AP, with the reaction time of 30 and 50 s, for Cu/MCM-41-10 and Cu/MCM-41-24 respectively. The reaction follows a pseudo-first order law, with a rate constant of 0.374 and 0.109 s−1 for Cu/MCM-41-10 and Cu/MCM-41-24, respectively. Both catalysts were stable and could be reused up to ten times in consecutive runs without any treatment between the cycles. The catalytic activity was retained without loss of efficiency, indicating the high stability of the MCM-41 based catalysts under the reaction conditions.Fil: Schlichter, Sofia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; ArgentinaFil: Rocha, Marian. Universidad de Porto; PortugalFil: Peixoto, Andreia F.. Universidad de Porto; PortugalFil: Pires, João. Universidade de Lisboa; PortugalFil: Freire, Cristina. Universidad de Porto; PortugalFil: Alvarez, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; ArgentinaPergamon-Elsevier Science Ltd2018-08-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/87425Schlichter, Sofia; Rocha, Marian; Peixoto, Andreia F.; Pires, João; Freire, Cristina; et al.; Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media; Pergamon-Elsevier Science Ltd; Polyhedron; 150; 9-8-2018; 69-760277-5387CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0277538718302146info:eu-repo/semantics/altIdentifier/doi/10.1016/j.poly.2018.04.037info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-11-26T08:38:05Zoai:ri.conicet.gov.ar:11336/87425instacron: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:34982025-11-26 08:38:05.926CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media
title Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media
spellingShingle Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media
Schlichter, Sofia
4-NITROPHENOL REDUCTION
COPPER CATALYSTS
MCM-41
MESOPOROUS MATERIALS
NABH4
title_short Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media
title_full Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media
title_fullStr Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media
title_full_unstemmed Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media
title_sort Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media
dc.creator.none.fl_str_mv Schlichter, Sofia
Rocha, Marian
Peixoto, Andreia F.
Pires, João
Freire, Cristina
Alvarez, Mariana
author Schlichter, Sofia
author_facet Schlichter, Sofia
Rocha, Marian
Peixoto, Andreia F.
Pires, João
Freire, Cristina
Alvarez, Mariana
author_role author
author2 Rocha, Marian
Peixoto, Andreia F.
Pires, João
Freire, Cristina
Alvarez, Mariana
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv 4-NITROPHENOL REDUCTION
COPPER CATALYSTS
MCM-41
MESOPOROUS MATERIALS
NABH4
topic 4-NITROPHENOL REDUCTION
COPPER CATALYSTS
MCM-41
MESOPOROUS MATERIALS
NABH4
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Two mesoporous-based catalysts with different nominal copper loads (10 and 24% w/w) were prepared from impregnation of the MCM-41 support with copper acetylacetonate: Cu/MCM-41-10 and Cu/MCM-41-24, respectively. Samples with a metallic charge similar to the nominal content were obtained and the mesoporous structure was retained after the impregnation. X-ray diffractograms evidenced the presence of CuO in the catalyst with the higher metal loading. The catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in aqueous medium, with an excess of NaBH4, was chosen as a model reaction to evaluate the catalytic activity of the Cu/MCM-41-10 and Cu/MCM-41-24 catalysts. The 4-NP concentrations at prefixed intervals were monitored using UV–Vis spectroscopy. The Cu-based catalysts led to almost 100% reduction of 4-NP to 4-AP, with the reaction time of 30 and 50 s, for Cu/MCM-41-10 and Cu/MCM-41-24 respectively. The reaction follows a pseudo-first order law, with a rate constant of 0.374 and 0.109 s−1 for Cu/MCM-41-10 and Cu/MCM-41-24, respectively. Both catalysts were stable and could be reused up to ten times in consecutive runs without any treatment between the cycles. The catalytic activity was retained without loss of efficiency, indicating the high stability of the MCM-41 based catalysts under the reaction conditions.
Fil: Schlichter, Sofia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
Fil: Rocha, Marian. Universidad de Porto; Portugal
Fil: Peixoto, Andreia F.. Universidad de Porto; Portugal
Fil: Pires, João. Universidade de Lisboa; Portugal
Fil: Freire, Cristina. Universidad de Porto; Portugal
Fil: Alvarez, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina
description Two mesoporous-based catalysts with different nominal copper loads (10 and 24% w/w) were prepared from impregnation of the MCM-41 support with copper acetylacetonate: Cu/MCM-41-10 and Cu/MCM-41-24, respectively. Samples with a metallic charge similar to the nominal content were obtained and the mesoporous structure was retained after the impregnation. X-ray diffractograms evidenced the presence of CuO in the catalyst with the higher metal loading. The catalytic reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) in aqueous medium, with an excess of NaBH4, was chosen as a model reaction to evaluate the catalytic activity of the Cu/MCM-41-10 and Cu/MCM-41-24 catalysts. The 4-NP concentrations at prefixed intervals were monitored using UV–Vis spectroscopy. The Cu-based catalysts led to almost 100% reduction of 4-NP to 4-AP, with the reaction time of 30 and 50 s, for Cu/MCM-41-10 and Cu/MCM-41-24 respectively. The reaction follows a pseudo-first order law, with a rate constant of 0.374 and 0.109 s−1 for Cu/MCM-41-10 and Cu/MCM-41-24, respectively. Both catalysts were stable and could be reused up to ten times in consecutive runs without any treatment between the cycles. The catalytic activity was retained without loss of efficiency, indicating the high stability of the MCM-41 based catalysts under the reaction conditions.
publishDate 2018
dc.date.none.fl_str_mv 2018-08-09
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/11336/87425
Schlichter, Sofia; Rocha, Marian; Peixoto, Andreia F.; Pires, João; Freire, Cristina; et al.; Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media; Pergamon-Elsevier Science Ltd; Polyhedron; 150; 9-8-2018; 69-76
0277-5387
CONICET Digital
CONICET
url http://hdl.handle.net/11336/87425
identifier_str_mv Schlichter, Sofia; Rocha, Marian; Peixoto, Andreia F.; Pires, João; Freire, Cristina; et al.; Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media; Pergamon-Elsevier Science Ltd; Polyhedron; 150; 9-8-2018; 69-76
0277-5387
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/S0277538718302146
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.poly.2018.04.037
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
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
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 13.011256

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