Probing the Catalytic Activity of Reduced Graphene Oxide Decorated with Au Nanoparticles Triggered by Visible Light

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dc.contributor.authorWang J.
dc.contributor.authorTrindade F.J.
dc.contributor.authorDe Aquino C.B.
dc.contributor.authorPieretti J.C.
dc.contributor.authorDomingues S.H.
dc.contributor.authorAndo R.A.
dc.contributor.authorCamargo P.H.C.
dc.date.accessioned2024-03-13T00:57:04Z
dc.date.available2024-03-13T00:57:04Z
dc.date.issued2015
dc.description.abstract© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.Hybrid materials in which reduced graphene oxide (rGO) is decorated with Au nanoparticles (rGO-Au NPs) were obtained by the in situ reduction of GO and AuCl<inf>4</inf><sup>-</sup><inf>(aq)</inf> by ascorbic acid. On laser excitation, rGO could be oxidized as a result of the surface plasmon resonance (SPR) excitation in the Au NPs, which generates activated O<inf>2</inf> through the transfer of SPR-excited hot electrons to O<inf>2</inf> molecules adsorbed from air. The SPR-mediated catalytic oxidation of p-aminothiophenol (PATP) to p,p′-dimercaptoazobenzene (DMAB) was then employed as a model reaction to probe the effect of rGO as a support for Au NPs on their SPR-mediated catalytic activities. The increased conversion of PATP to DMAB relative to individual Au NPs indicated that charge-transfer processes from rGO to Au took place and contributed to improved SPR-mediated activity. Since the transfer of electrons from Au to adsorbed O<inf>2</inf> molecules is the crucial step for PATP oxidation, in addition to the SPR-excited hot electrons of Au NPs, the transfer of electrons from rGO to Au contributed to increasing the electron density of Au above the Fermi level and thus the Au-to-O<inf>2</inf> charge-transfer process.
dc.description.firstpage9889
dc.description.issuenumber27
dc.description.lastpage9894
dc.description.volume21
dc.identifier.doi10.1002/chem.201500677
dc.identifier.issn1521-3765
dc.identifier.urihttps://dspace.mackenzie.br/handle/10899/36191
dc.relation.ispartofChemistry - A European Journal
dc.rightsAcesso Restrito
dc.subject.otherlanguagegold
dc.subject.otherlanguagegraphene
dc.subject.otherlanguagenanoparticles
dc.subject.otherlanguagephotocatalysis
dc.subject.otherlanguagesurface plasmon resonance
dc.titleProbing the Catalytic Activity of Reduced Graphene Oxide Decorated with Au Nanoparticles Triggered by Visible Light
dc.typeArtigo
local.scopus.citations22
local.scopus.eid2-s2.0-84934903835
local.scopus.subjectAu nanoparticle
local.scopus.subjectCharge transfer process
local.scopus.subjectMediated activities
local.scopus.subjectModel reactions
local.scopus.subjectP-aminothiophenol
local.scopus.subjectReduced graphene oxides
local.scopus.subjectReduced graphene oxides (RGO)
local.scopus.subjectSitu reduction
local.scopus.updated2024-05-01
local.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84934903835&origin=inward
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