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Enhancement of the catalytic activity of supported gold nanoparticles for the fenton reaction by light

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Enhancement of the catalytic activity of supported gold nanoparticles for the fenton reaction by light

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dc.contributor.author Navalón Oltra, Sergio es_ES
dc.contributor.author De Miguel de la Torre, Maykel es_ES
dc.contributor.author Martín González, Roberto es_ES
dc.contributor.author Alvaro Rodríguez, Maria Mercedes es_ES
dc.contributor.author García Gómez, Hermenegildo es_ES
dc.date.accessioned 2013-05-09T07:31:43Z
dc.date.issued 2011
dc.identifier.issn 0002-7863
dc.identifier.uri http://hdl.handle.net/10251/28697
dc.description.abstract [EN] Laser flash photolysis of supported gold nanopar-ticles exciting at the surface plasmon band (532 nm) has allowed in the case of Au/CeO 2 and Au/OH-npD (OH-npD: Fenton-treated diamond nanoparticles) detection of transients decaying in the microsecond time scale that have been attributed as indicating photoinduced electron ejection from gold based on N 2O quenching and the observation of the generation of methyl viologen radical cations. This photochemical behavior has led us to hypothesize that there could be assistance to the catalytic activity of these materials by irradiation in those cases wherein the mechanism involves electron transfer to or from a substrate to the gold. This hypothesis has been confirmed by observing that the catalytic activity of Au/OH-npD for the Fenton degradation of phenol with hydrogen peroxide can be increased over 1 order of magnitude by irradiation at 532 nm. Moreover, there is a linear relationship between the initial reaction rate and the incident photon flux. This photoenhancement allows promoting Fenton activity at pH 8 in which the catalytic activity of Au/OH-npD is negligible. The same photo enhancement activity for the Fenton degradation of phenol was observed for other supported gold catalysts including those that do not exhibit microsecond transients in the nanosecond laser flash photolysis (Au/TiO 2 and Au/SiO 2) due to their lifetime shorter than microseconds. It is proposed that the photo enhancement should be a general phenomenon in gold catalysis for those reaction mechanisms involving positive and/or negative gold species. © 2011 American Chemical Society. es_ES
dc.description.sponsorship Financial support by Spanish MICINN (CTQ2009-11583) is grateful acknowledgment. S.N. thanks the Technical University of Valencia for an assistant professor contract (Programa Cantera). R.M. thanks Spanish minister of Science Innovation MICINN for a FPU postgraduate fellowship. en_EN
dc.language Inglés es_ES
dc.publisher American Chemical Society es_ES
dc.relation MICINN/CTQ2009-11583 es_ES
dc.relation.ispartof Journal of the American Chemical Society es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Catalytic activity es_ES
dc.subject Degradation of phenols es_ES
dc.subject Diamond nanoparticles es_ES
dc.subject Electron transfer es_ES
dc.subject Fenton activity es_ES
dc.subject Fenton reactions es_ES
dc.subject Gold catalysis es_ES
dc.subject Laser flash photolysis es_ES
dc.subject Linear relationships es_ES
dc.subject Methyl viologen es_ES
dc.subject Nanosecond lasers es_ES
dc.subject Order of magnitude es_ES
dc.subject Photochemical behaviors es_ES
dc.subject Photoenhancement es_ES
dc.subject Photoinduced electrons es_ES
dc.subject Photon flux es_ES
dc.subject Reaction mechanism es_ES
dc.subject Supported gold es_ES
dc.subject Supported gold catalysts es_ES
dc.subject Surface plasmon band es_ES
dc.subject Time-scales es_ES
dc.subject Biodegradation es_ES
dc.subject Free radical reactions es_ES
dc.subject Gold es_ES
dc.subject Hydrogen peroxide es_ES
dc.subject Irradiation es_ES
dc.subject Nanoparticles es_ES
dc.subject Phenols es_ES
dc.subject Photodegradation es_ES
dc.subject Photolysis es_ES
dc.subject Reaction rates es_ES
dc.subject Transients es_ES
dc.subject Catalyst activity es_ES
dc.subject Diamond es_ES
dc.subject Gold nanoparticle es_ES
dc.subject Phenol es_ES
dc.subject Silicon dioxide es_ES
dc.subject Titanium dioxide es_ES
dc.subject Alcohol oxidation es_ES
dc.subject Article es_ES
dc.subject Catalysis es_ES
dc.subject Electron transport es_ES
dc.subject Fenton reaction es_ES
dc.subject Laser es_ES
dc.subject Light es_ES
dc.subject PH es_ES
dc.subject Photochemistry es_ES
dc.subject Surface plasmon resonance es_ES
dc.subject.classification QUIMICA ORGANICA es_ES
dc.title Enhancement of the catalytic activity of supported gold nanoparticles for the fenton reaction by light es_ES
dc.type Artículo es_ES
dc.embargo.lift 10000-01-01
dc.embargo.terms forever es_ES
dc.identifier.doi 10.1021/ja108816p
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Química - Departament de Química es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química es_ES
dc.description.bibliographicCitation Navalón Oltra, S.; De Miguel De La Torre, M.; Martín González, R.; Alvaro Rodríguez, MM.; García Gómez, H. (2011). Enhancement of the catalytic activity of supported gold nanoparticles for the fenton reaction by light. Journal of the American Chemical Society. 133(7):2218-2226. doi:10.1021/ja108816p es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.1021/ja108816p es_ES
dc.description.upvformatpinicio 2218 es_ES
dc.description.upvformatpfin 2226 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 133 es_ES
dc.description.issue 7 es_ES
dc.relation.senia 202452
dc.identifier.pmid 21280633
dc.contributor.funder Ministerio de Ciencia e Innovación


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