ZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysis

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dc.contributor.authorLucilha, Adriana Campano
dc.contributor.authorSilva, Marcelo Rodrigues Da
dc.contributor.authorAndo, Rômulo Augusto
dc.contributor.authorDall'antonia, Luiz Henrique
dc.contributor.authorTakashima, Keiko
dc.contributor.institutionUniversidade Estadual de Londrina
dc.contributor.institutionUniversidade Estadual Júlio de Mesquita
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2021-07-14T10:20:36Z
dc.date.available2021-07-14T10:20:36Z
dc.date.issued2016-05
dc.description.abstractZnO and Ag-ZnO were synthesized in a simple and efficient manner by thermal decomposition of zinc oxalate and silver/zinc mixed oxalate. The influence of the addition of metallic silver on ZnO particles and the effect of temperature in the thermal treatment were investigated. The samples were characterized by thermogravimetric analysis, Raman, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, specific surface area (Brunauer-Emmett-Teller) and diffuse reflectance spectroscopy. The photocatalytic activity of these materials in the decolorization of direct red 23 diazo dye was studied. The complete conversion into oxides from oxalates at lower temperatures was determinant in the photocatalytic efficiency of both the oxides. The presence of silver in zinc oxide, treated at 400 °C, more than doubled the rate constant of diazo dye decolorization (6.87×10-3 min-1) with respect to ZnO, treated at 600 °C, resulting in 3.07×10-3 min-1 under UV irradiation at 30 °C.en
dc.description.affiliationUniversidade Estadual de Londrina, Departamento de Química
dc.description.affiliationUniversidade Estadual Júlio de Mesquita, Colégio Técnico Industrial
dc.description.affiliationUniversidade de São Paulo, Instituto de Química
dc.description.sponsorshipFundação Araucária de Apoio ao Desenvolvimento Científico e Tecnológico do Paraná (FAADCT/PR)
dc.description.sponsorshipIdFundação Araucária: 22850/2011
dc.format.extent409-414
dc.identifierhttp://dx.doi.org/10.5935/0100-4042.20160041
dc.identifier.citationQuímica Nova. Sociedade Brasileira de Química, v. 39, n. 4, p. 409-414, 2016.
dc.identifier.doi10.5935/0100-4042.20160041
dc.identifier.fileS0100-40422016000400409.pdf
dc.identifier.issn0100-4042
dc.identifier.issn1678-7064
dc.identifier.scieloS0100-40422016000400409
dc.identifier.urihttp://hdl.handle.net/11449/211188
dc.language.isoeng
dc.publisherSociedade Brasileira de Química
dc.relation.ispartofQuímica Nova
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectoxide semiconductoren
dc.subjectsurface modificationen
dc.subjectthermal treatmenten
dc.subjectdirect red 23en
dc.titleZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysisen
dc.typeArtigo

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