Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/326968
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authoremailj.gimenez.fa@ub.edupt_BR
dc.contributor.authorunicampDantas, Renato Falcãopt_BR
dc.typeArtigopt_BR
dc.titlePhotocatalytic Mechanism Of Metoprolol Oxidation By Photocatalysts Tio2 And Tio2 Doped With 5% B: Primary Active Species And Intermediatesen
dc.titlePhotocatalytic mechanism of metoprolol oxidation by photocatalysts TiO2 and TiO2 doped with 5% B: primary active species and intermediatespt_BR
dc.contributor.authorCavalcante, Rodrigo Pereirapt_BR
dc.contributor.authorDantas, Renato Falcãopt_BR
dc.contributor.authorBayarri, Bernardípt_BR
dc.contributor.authorGonzález, Oscarpt_BR
dc.contributor.authorGiménez, Jaimept_BR
dc.contributor.authorEsplugas, Santiagopt_BR
dc.contributor.authorMachulek Junior, Amilcarpt_BR
unicamp.author[Dantas, Renato Falcao] Univ Estadual Campinas, Sch Technol, Paschoal Marmo 1888, BR-13484332 Limeira, SP, Brazilpt_BR
unicamp.author.external[Cavalcante, Rodrigo Pereirapt_BR
unicamp.author.externalMachulek Junior, Amilcar] Univ Fed Mato Grosso do Sul, Inst Chem, Av Senador Filinto Muller 1555,CP 549, BR-79074460 Campo Grande, MS, Brazilpt_BR
unicamp.author.external[Bayarri, Bernardipt_BR
unicamp.author.externalGonzalez, Oscarpt_BR
unicamp.author.externalGimenez, Jaimept_BR
unicamp.author.externalEsplugas, Santiago] Univ Barcelona, Dept Chem Engn, C Marti Franques 1, E-08028 Barcelona, Spainpt_BR
dc.subjectProcesso fotocatalíticopt_BR
dc.subject.otherlanguagePhotocatalytic processpt_BR
dc.description.abstractIn photocatalysis, controversy still exists over as whether oxidation proceeds via primary oxidants, such as HO center dot radicals, positive holes, electrons, O-2(center dot)-radicals in the photodegradation process. The contribution of the main active species to the photocatalytic degradation of metoprolol (MET) using a solar simulator with Xenon lamp as irradiation source was examined by using different specific scavengers (formic acid, tert-butyl alcohol, rho-benzoquinone and oxygen). According to this, we also compared the effect on the generation of active species, in the MET degradation, of two types of TiO2 catalyst having different physical and chemical properties: pure TiO2 and TiO2 doped with 5% B (w/w), both synthesized by sol-gel method. The scavenger study indicates that HO center dot radicals are the dominant reactive species, contributing around 80% and to a lesser extent by the contribution of O-2(center dot)- radicals and holes in systems using TiO2 doped with 5% B (w/w). However, when pure TiO2 was used as catalyst, experiments carried out in rho-benzoquinone demonstrate that O-2(center dot)-radicals did not participate in the degradation mechanism of MET. Oxygen seems to play an important role during the observed degradation of MET. Additionally, the relation between the intermediates formed during the photocatalytic degradation with TiO2 doped 5% B (w/w) as catalyst, with addition of specific scavengers, was investigated and distinct degradation pathways have been proposed for each active species involved. By-products studies in the presence of scavengers were used as a diagnostic tool for the analysis of the photocatalytic mechanism and it was possible to prove that there is change in the reactions of the degradation process of MET when change the role of any active species generated on the surface of the catalyst. (C) 2016 Elsevier B.V. All rights reserved.en
dc.description.abstractIn photocatalysis, controversy still exists over as whether oxidation proceeds via primary oxidants, such as HO radicals, positive holes, electrons, O2− radicals in the photodegradation process. The contribution of the main active species to the photocatapt_BR
dc.relation.ispartofApplied catalysis B: environmentalpt_BR
dc.publisher.cityAmsterdampt_BR
dc.publisher.countryHolandapt_BR
dc.publisherElsevierpt_BR
dc.date.issued2016pt_BR
dc.date.monthofcirculationOct.pt_BR
dc.identifier.citationApplied Catalysis B-environmental. Elsevier Science Bv, v. 194, p. 111 - 122, 2016.pt_BR
dc.language.isoengpt_BR
dc.description.volume194pt_BR
dc.description.firstpage111pt_BR
dc.description.lastpage122pt_BR
dc.rightsfechadopt_BR
dc.rightsFechadopt_br
dc.sourceWOSpt_BR
dc.identifier.issn0926-3373pt_BR
dc.identifier.eissn1873-3883pt_BR
dc.identifier.wosidWOS:000377827300014pt_BR
dc.identifier.doi10.1016/j.apcatb.2016.04.054pt_BR
dc.identifier.urlhttps://www.sciencedirect.com/science/article/pii/S0926337316303277pt_BR
dc.description.sponsorshipCNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOpt_BR
dc.description.sponsorshipCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORpt_BR
dc.description.sponsorshipFUNDECT - FUNDAÇÃO DE APOIO AO DESENVOLVIMENTO DO ENSINO, CIÊNCIA E TECNOLOGIA DO ESTADO DE MATO GROSSO DO SULpt_BR
dc.description.sponsorship1Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)pt_BR
dc.description.sponsorship1Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)pt_BR
dc.description.sponsordocumentnumbersem informaçãopt_BR
dc.description.sponsordocumentnumbersem informaçãopt_BR
dc.description.sponsordocumentnumbersem informaçãopt_BR
dc.date.available2017-11-13T13:12:57Z-
dc.date.accessioned2017-11-13T13:12:57Z-
dc.description.provenanceMade available in DSpace on 2017-11-13T13:12:57Z (GMT). No. of bitstreams: 1 000377827300014.pdf: 1961177 bytes, checksum: 25f66384137864251c9c2f7c2b17ae08 (MD5) Previous issue date: 2016en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/326968-
dc.contributor.departmentSem informaçãopt_BR
dc.contributor.unidadeFaculdade de Tecnologiapt_BR
dc.subject.keywordTiO2 and TiO2/5% B(w/w) photocatalytic processpt_BR
dc.subject.keywordMetoprololpt_BR
dc.subject.keywordScavengerspt_BR
dc.subject.keywordMechanismpt_BR
dc.identifier.source000377827300014pt_BR
dc.creator.orcid0000-0001-6208-8763pt_BR
dc.type.formArtigo de pesquisapt_BR
dc.description.sponsorNoteThe authors wish to thank the Brazilian funding agencies CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico), CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior), FUNDECT (Fundação de Apoio ao Desenvolvimento do Ensino, Cipt_BR
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