Preparation and characterization of Zno/CuO semiconductor and photocatalytic activity on the decolorization of direct red 80 azodye

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual de Londrina (UEL)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorDa Silva, Wallace J.C.-
Autor(es): dc.creatorDa Silva, Marcelo R. [UNESP]-
Autor(es): dc.creatorTakashima, Keiko-
Data de aceite: dc.date.accessioned2022-08-04T22:05:21Z-
Data de disponibilização: dc.date.available2022-08-04T22:05:21Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2015-12-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.4067/s0717-97072015000400022-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/220567-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/220567-
Descrição: dc.descriptionZinc oxide, an n-type semiconductor, has been used as photocatalyst for contaminated water purification by organic compounds. The addition of a p-type semiconductor as copper oxide could increase the catalytic efficiency through the p-n junction in order to decrease the electron-hole recombination. In this work, zinc and copper oxides containing 1.0, 3.0, and 5.0 % of copper were prepared by manual grinding, followed by heat treatment at 300C during 5 h. The zinc oxide and copper oxide mixture as well as their precursors were characterized by x-ray diffraction, diffuse reflectance, scanning electron microscopy, and x-ray fluorescence. The photocatalytic efficiency was verified by the direct red 80 tetraazodye decolorization using UV radiation under pseudo-first order conditions at natural pH (7.5-8.0) and 30 °C. The highest photocatalytic activity occurred to the semiconductor containing 1.0 % copper oxide, whose decolorization rate constant was equivalent to 6.40×10-2min-1, that is, 17.4 % larger in comparison to ZnO, 5.45×10-2min-1.-
Descrição: dc.descriptionDepartamento de Química Laboratório de Processos de Oxidação Avançados Universidade Estadual de Londrina, caixa postal 10011-
Descrição: dc.descriptionFaculdade de Engenharia Colégio Técnico Industrial Universidade Estadual Paulista, caixa postal 473-
Descrição: dc.descriptionFaculdade de Engenharia Colégio Técnico Industrial Universidade Estadual Paulista, caixa postal 473-
Formato: dc.format2749-2751-
Idioma: dc.languageen-
Relação: dc.relationJournal of the Chilean Chemical Society-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCharacterization-
Palavras-chave: dc.subjectCopper oxide-
Palavras-chave: dc.subjectDirect red 80-
Palavras-chave: dc.subjectHeterogeneous photocatalysis-
Palavras-chave: dc.subjectZinc oxide-
Título: dc.titlePreparation and characterization of Zno/CuO semiconductor and photocatalytic activity on the decolorization of direct red 80 azodye-
Tipo de arquivo: dc.typelivro digital-
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