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

Detalhes bibliográficos
Autor(a) principal: Lucilha, Adriana Campano
Data de Publicação: 2016
Outros Autores: Silva, Marcelo Rodrigues Da, Ando, Rômulo Augusto, Dall'antonia, Luiz Henrique, Takashima, Keiko
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.5935/0100-4042.20160041
http://hdl.handle.net/11449/211188
Resumo: ZnO 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.
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spelling ZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysisoxide semiconductorsurface modificationthermal treatmentdirect red 23ZnO 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.Fundação Araucária de Apoio ao Desenvolvimento Científico e Tecnológico do Paraná (FAADCT/PR)Universidade Estadual de Londrina, Departamento de QuímicaUniversidade Estadual Júlio de Mesquita, Colégio Técnico IndustrialUniversidade de São Paulo, Instituto de QuímicaFundação Araucária: 22850/2011Sociedade Brasileira de QuímicaUniversidade Estadual de LondrinaUniversidade Estadual Júlio de MesquitaUniversidade de São Paulo (USP)Lucilha, Adriana CampanoSilva, Marcelo Rodrigues DaAndo, Rômulo AugustoDall'antonia, Luiz HenriqueTakashima, Keiko2021-07-14T10:20:36Z2021-07-14T10:20:36Z2016-05info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article409-414application/pdfhttp://dx.doi.org/10.5935/0100-4042.20160041Química Nova. Sociedade Brasileira de Química, v. 39, n. 4, p. 409-414, 2016.0100-40421678-7064http://hdl.handle.net/11449/21118810.5935/0100-4042.20160041S0100-40422016000400409S0100-40422016000400409.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengQuímica Novainfo:eu-repo/semantics/openAccess2023-10-21T06:06:20Zoai:repositorio.unesp.br:11449/211188Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:31:16.805900Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv ZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysis
title ZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysis
spellingShingle ZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysis
Lucilha, Adriana Campano
oxide semiconductor
surface modification
thermal treatment
direct red 23
title_short ZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysis
title_full ZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysis
title_fullStr ZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysis
title_full_unstemmed ZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysis
title_sort ZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysis
author Lucilha, Adriana Campano
author_facet Lucilha, Adriana Campano
Silva, Marcelo Rodrigues Da
Ando, Rômulo Augusto
Dall'antonia, Luiz Henrique
Takashima, Keiko
author_role author
author2 Silva, Marcelo Rodrigues Da
Ando, Rômulo Augusto
Dall'antonia, Luiz Henrique
Takashima, Keiko
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual de Londrina
Universidade Estadual Júlio de Mesquita
Universidade de São Paulo (USP)
dc.contributor.author.fl_str_mv Lucilha, Adriana Campano
Silva, Marcelo Rodrigues Da
Ando, Rômulo Augusto
Dall'antonia, Luiz Henrique
Takashima, Keiko
dc.subject.por.fl_str_mv oxide semiconductor
surface modification
thermal treatment
direct red 23
topic oxide semiconductor
surface modification
thermal treatment
direct red 23
description ZnO 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.
publishDate 2016
dc.date.none.fl_str_mv 2016-05
2021-07-14T10:20:36Z
2021-07-14T10:20:36Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.5935/0100-4042.20160041
Química Nova. Sociedade Brasileira de Química, v. 39, n. 4, p. 409-414, 2016.
0100-4042
1678-7064
http://hdl.handle.net/11449/211188
10.5935/0100-4042.20160041
S0100-40422016000400409
S0100-40422016000400409.pdf
url http://dx.doi.org/10.5935/0100-4042.20160041
http://hdl.handle.net/11449/211188
identifier_str_mv Química Nova. Sociedade Brasileira de Química, v. 39, n. 4, p. 409-414, 2016.
0100-4042
1678-7064
10.5935/0100-4042.20160041
S0100-40422016000400409
S0100-40422016000400409.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Química Nova
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 409-414
application/pdf
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv SciELO
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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