SrSnO3 perovskite obtained by the modified Pechini method—Insights about its photocatalytic activity

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dc.contributor.authorTeixeira, Ana Rita Ferreira Alves
dc.contributor.authorde Meireles Neris, Alex
dc.contributor.authorLongo, Elson [UNESP]
dc.contributor.authorde Carvalho Filho, José Rodrigues
dc.contributor.authorHakki, Amer
dc.contributor.authorMacphee, Donald
dc.contributor.authordos Santos, Ieda Maria Garcia
dc.contributor.institutionUniversidade Federal da Paraíba (UFPB)
dc.contributor.institutionUniversity of Aberdeen
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2019-10-06T16:53:22Z
dc.date.available2019-10-06T16:53:22Z
dc.date.issued2019-01-15
dc.description.abstractThe use of SrSnO3 as a photocatalyst in different applications has been growing in recent years, particularly for degradation of organic dyes. In the present work, SrSnO3 catalyst was synthesized by the modified Pechini method and applied in the photocatalytic degradation of a textile azo-dye in aqueous solution under ultraviolet irradiation. The dominant photocatalytic species for this system were evaluated, determined from terephthalic acid photohydroxylation and from different scavengers. Moreover, electrochemical data were used to evaluate charge transfer between SrSnO3 and the species involved in the photocatalysis – O2, H2O and the scavengers. The irradiation time required to achieve 98% decolorization of a Remazol Golden Yellow (RNL) solution was 10 h. The catalyst simultaneously reduced all the absorption bands in the UV–vis spectrum of RNL, suggesting pollutant degradation. Isopropanol, silver and formic acid were all employed to test the importance of different photocatalytic processes and the photohydroxylation of terephthalic acid confirmed the generation of [rad]OH. A comparison of the SrSnO3 band positions and the potential of relevant redox couples suggests possible mechanisms for [rad]OH generation from both photogenerated carrier types (electrons and holes), in agreement with the results obtained using the hole/electron scavengers.en
dc.description.affiliationNPE/LACOM Núcleo de Pesquisa e Extensão - Laboratório de Combustíveis e Materiais Universidade Federal da Paraíba
dc.description.affiliationDepartment of Chemistry University of Aberdeen, Meston Building, Meston Walk
dc.description.affiliationCDMF/LIEC Universidade Estadual Paulista IQ-UNESP
dc.description.affiliationUnespCDMF/LIEC Universidade Estadual Paulista IQ-UNESP
dc.format.extent181-188
dc.identifierhttp://dx.doi.org/10.1016/j.jphotochem.2018.10.028
dc.identifier.citationJournal of Photochemistry and Photobiology A: Chemistry, v. 369, p. 181-188.
dc.identifier.doi10.1016/j.jphotochem.2018.10.028
dc.identifier.issn1010-6030
dc.identifier.scopus2-s2.0-85055197051
dc.identifier.urihttp://hdl.handle.net/11449/189824
dc.language.isoeng
dc.relation.ispartofJournal of Photochemistry and Photobiology A: Chemistry
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectHydroxyl radical
dc.subjectIsopropanol
dc.subjectPhotocatalysis
dc.subjectScavenger
dc.subjectStrontium stannate
dc.titleSrSnO3 perovskite obtained by the modified Pechini method—Insights about its photocatalytic activityen
dc.typeArtigo
unesp.author.orcid0000-0002-3349-3994 0000-0002-3349-3994[7]

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