Mostrar el registro sencillo del ítem
dc.contributor.author
Schlichter, Sofia
![Se ha confirmado la validez de este valor de autoridad por un usuario](/themes/CONICETDigital/images/authority_control/invisible.gif)
dc.contributor.author
Rocha, Marian
dc.contributor.author
Peixoto, Andreia F.
dc.contributor.author
Pires, João
dc.contributor.author
Freire, Cristina
dc.contributor.author
Alvarez, Mariana
![Se ha confirmado la validez de este valor de autoridad por un usuario](/themes/CONICETDigital/images/authority_control/invisible.gif)
dc.date.available
2019-10-28T20:11:34Z
dc.date.issued
2018-08-09
dc.identifier.citation
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
dc.identifier.issn
0277-5387
dc.identifier.uri
http://hdl.handle.net/11336/87425
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
![Se ha confirmado la validez de este valor de autoridad por un usuario](/themes/CONICETDigital/images/authority_control/invisible.gif)
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
4-NITROPHENOL REDUCTION
dc.subject
COPPER CATALYSTS
dc.subject
MCM-41
dc.subject
MESOPOROUS MATERIALS
dc.subject
NABH4
dc.subject.classification
Otras Ciencias Químicas
![Se ha confirmado la validez de este valor de autoridad por un usuario](/themes/CONICETDigital/images/authority_control/invisible.gif)
dc.subject.classification
Ciencias Químicas
![Se ha confirmado la validez de este valor de autoridad por un usuario](/themes/CONICETDigital/images/authority_control/invisible.gif)
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
![Se ha confirmado la validez de este valor de autoridad por un usuario](/themes/CONICETDigital/images/authority_control/invisible.gif)
dc.title
Copper mesoporous materials as highly efficient recyclable catalysts for the reduction of 4-nitrophenol in aqueous media
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-10-23T21:31:49Z
dc.journal.volume
150
dc.journal.pagination
69-76
dc.journal.pais
Estados Unidos
![Se ha confirmado la validez de este valor de autoridad por un usuario](/themes/CONICETDigital/images/authority_control/invisible.gif)
dc.journal.ciudad
Nueva York
dc.description.fil
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
dc.description.fil
Fil: Rocha, Marian. Universidad de Porto; Portugal
dc.description.fil
Fil: Peixoto, Andreia F.. Universidad de Porto; Portugal
dc.description.fil
Fil: Pires, João. Universidade de Lisboa; Portugal
dc.description.fil
Fil: Freire, Cristina. Universidad de Porto; Portugal
dc.description.fil
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
dc.journal.title
Polyhedron
![Se ha confirmado la validez de este valor de autoridad por un usuario](/themes/CONICETDigital/images/authority_control/invisible.gif)
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0277538718302146
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.poly.2018.04.037
Archivos asociados