ZNO and AG-ZNO crystals: synthesis, characterization, and application in heterogeneous photocatalysis
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , |
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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Repositório Institucional da UNESP |
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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 |
|
_version_ |
1808128525646954496 |