Low tungsten content of nanostructured material supported on carbon for the degradation of phenol

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dc.contributor.authorAssumpção, M. H M T
dc.contributor.authorDe Souza, R. F B
dc.contributor.authorReis, R. M.
dc.contributor.authorRocha, R. S.
dc.contributor.authorSteter, J. R.
dc.contributor.authorHammer, Peter [UNESP]
dc.contributor.authorGaubeur, I.
dc.contributor.authorCalegaro, M. L.
dc.contributor.authorLanza, M. R V
dc.contributor.authorSantos, Mirian Cristina dos [UNESP]
dc.contributor.institutionUniversidade Federal do ABC (UFABC)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:30:46Z
dc.date.available2014-05-27T11:30:46Z
dc.date.issued2013-10-01
dc.description.abstractA comparative study using different mass proportions of WO3/C (1%, 5%, 10% and 15%) for H2O2 electrogeneration and subsequent phenol degradation was performed. To include the influence of the carbon substrate and the preparation methods, all synthesis parameters were evaluated. The WO3/C materials were prepared by a modified polymeric precursor method (PPM) and the sol-gel method (SGM) on Vulcan XC 72R and Printex L6 carbon supports, verifying the most efficient metal/carbon proportion. The materials were physically characterized by X-ray diffraction (XRD) and by X-ray photoelectron spectroscopy (XPS) techniques. The XRD and the XPS techniques identified just one phase containing WO3 and elevated oxygen concentration on carbon with the presence of WO3. The oxygen reduction reaction (ORR), studied by the rotating ring-disk electrode technique, showed that WO3/C material with the lowest tungsten content (1% WO3/C), supported on Vulcan XC 72R and prepared by SGM, was the most promising electrocatalyst for H2O2 electrogeneration. This material was then analyzed using a gas diffusion electrode (GDE) and 585mgL-1 of H2O2 was produced in acid media. This GDE was employed as a working electrode in an electrochemical cell to promote phenol degradation by an advanced oxidative process. The most efficient method applied was the photo-electro-Fenton; this method allowed for 65% degradation and 11% mineralization of phenol during a 2-h period. Following 12h of exhaustive electrolysis using the photo-electro-Fenton method, the total degradation of phenol was observed after 4h and the mineralization of phenol approached 75% after 12h. © 2013 Elsevier B.V.en
dc.description.affiliationLEMN - Laboratório de Eletroquímica e Materiais Nanoestruturados CCNH - Centro de Ciências Naturais e Humanas UFABC - Universidade Federal do ABC, Rua Santa Adélia 166, CEP 09.210-170 Bairro Bangu, Santo André SP
dc.description.affiliationInstituto de Química de São Carlos USP - Universidade de São Paulo, Caixa Postal 780, CEP 13.560-970, São Carlos, SP
dc.description.affiliationInstituto de Química UNESP - Universidade Estadual Paulista, 14801-970 Araraquara, SP
dc.description.affiliationUnespInstituto de Química UNESP - Universidade Estadual Paulista, 14801-970 Araraquara, SP
dc.format.extent479-486
dc.identifierhttp://dx.doi.org/10.1016/j.apcatb.2013.05.024
dc.identifier.citationApplied Catalysis B: Environmental, v. 142-143, p. 479-486.
dc.identifier.doi10.1016/j.apcatb.2013.05.024
dc.identifier.issn0926-3373
dc.identifier.lattes6466841023506131
dc.identifier.lattes1792298807472521
dc.identifier.orcid0000-0002-3823-0050
dc.identifier.scopus2-s2.0-84879508879
dc.identifier.urihttp://hdl.handle.net/11449/76696
dc.identifier.wosWOS:000324077600055
dc.language.isoeng
dc.relation.ispartofApplied Catalysis B: Environmental
dc.relation.ispartofjcr11.698
dc.relation.ispartofsjr3,152
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectHydrogen peroxide electrogeneration
dc.subjectPhenol degradation
dc.subjectTungsten oxide
dc.subjectDegradation of phenols
dc.subjectElectrogeneration
dc.subjectGas diffusion electrodes
dc.subjectOxygen reduction reaction
dc.subjectPolymeric precursor methods
dc.subjectRotating ring-disk electrode techniques
dc.subjectCarbon
dc.subjectElectrocatalysts
dc.subjectElectrolytic reduction
dc.subjectMineralogy
dc.subjectPhenols
dc.subjectPhotoelectrons
dc.subjectSol-gel process
dc.subjectSynthesis (chemical)
dc.subjectTungsten
dc.subjectX ray diffraction
dc.subjectX ray photoelectron spectroscopy
dc.subjectBiodegradation
dc.titleLow tungsten content of nanostructured material supported on carbon for the degradation of phenolen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
unesp.author.lattes6466841023506131(6)
unesp.author.lattes1792298807472521
unesp.author.orcid0000-0002-3823-0050(6)
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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