Evaluation of the photocatalytic activity of Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923

Detalhes bibliográficos
Autor(a) principal: Santana, Veronice Slusarski
Data de Publicação: 2009
Outros Autores: Mitushasi, Eduardo Ossamu, Fernandes-Machado, Nádia Regina Camargo
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta scientiarum. Technology (Online)
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/3923
Resumo: As heterogeneous photocatalysis has proved to be one of the most promising methods for the treatment of effluents, the study of photocatalytic activity of new catalysts is of great interest. Thus, degradation tests of burnt sugar solution were conducted through using 2 g of Nb2O5 and TiO2, massic, and Nb2O5 impregnated in glass beads (5.0, 10 and 15% Nb2O5 glass-1) under UV radiation for 168 hours. TiO2 and Nb2O5 were submitted to the agglomeration process (particle size: 0.210 and 0.297 mm) and calcined at 500ºC for 5h. Nb2O5 was solubilized in oxalic acid (0.5 mol L-1) at 70ºC for 8h, mixed with the glass beads, dried at 110ºC for 12h and calcined at 500ºC for 5h. The efficiency of the photocatalytic process was evaluated by UV-VIS spectrophotometry and DNS method. The results showed that catalysts of Nb2O5 are promising for application in photocatalysis, mainly 15% Nb2O5 glass-1, which presented similar results to TiO2.
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spelling Evaluation of the photocatalytic activity of Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923Avaliação da atividade fotocatalítica de Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923photocatalysisNbOimpregnationbeads glasssucrosefotocatáliseNb2O5impregnaçãoesferas de vidrosacaroseTratamento e aproveitamento de rejeitosAs heterogeneous photocatalysis has proved to be one of the most promising methods for the treatment of effluents, the study of photocatalytic activity of new catalysts is of great interest. Thus, degradation tests of burnt sugar solution were conducted through using 2 g of Nb2O5 and TiO2, massic, and Nb2O5 impregnated in glass beads (5.0, 10 and 15% Nb2O5 glass-1) under UV radiation for 168 hours. TiO2 and Nb2O5 were submitted to the agglomeration process (particle size: 0.210 and 0.297 mm) and calcined at 500ºC for 5h. Nb2O5 was solubilized in oxalic acid (0.5 mol L-1) at 70ºC for 8h, mixed with the glass beads, dried at 110ºC for 12h and calcined at 500ºC for 5h. The efficiency of the photocatalytic process was evaluated by UV-VIS spectrophotometry and DNS method. The results showed that catalysts of Nb2O5 are promising for application in photocatalysis, mainly 15% Nb2O5 glass-1, which presented similar results to TiO2.Como a fotocatálise heterogênea é um dos métodos de tratamento de efluentes mais promissores, o estudo da atividade fotocatalítica de novos catalisadores é de primordial interesse. Assim, testes de degradação de solução de sacarose parcialmente caramelizada foram realizados empregando 2 g de Nb2O5 e TiO2 mássicos e Nb2O5 impregnado em microesferas de vidro (5,0, 10 e 15%Nb2O5 vidro-1) sob radiação UV durante 168h. TiO2 e Nb2O5 foram submetidos a processo de aglomeração (tamanho de partícula: 0,210 e 0,297 mm) e calcinados a 500ºC por 5h. Nb2O5 foi solubilizado em ácido oxálico (0,5 mol L-1) a 70ºC por 8h, misturado com as microesferas de vidro, seco a 110ºC por 12h e calcinado a 500ºC por 5h. A eficiência do processo fotocatalítico foi avaliada por espectrofotometria UV-VIS e método DNS. Os resultados mostraram que catalisadores de Nb2O5 são promissores para aplicação em fotocatálise, principalmente o 15% Nb2O5 vidro-1, o qual apresentou resultados semelhantes ao do TiO2.Universidade Estadual De Maringá2009-11-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioncatáliseapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/392310.4025/actascitechnol.v32i1.3923Acta Scientiarum. Technology; Vol 32 No 1 (2010); 55-61Acta Scientiarum. Technology; v. 32 n. 1 (2010); 55-611806-25631807-8664reponame:Acta scientiarum. Technology (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/3923/3923Santana, Veronice SlusarskiMitushasi, Eduardo OssamuFernandes-Machado, Nádia Regina Camargoinfo:eu-repo/semantics/openAccess2024-05-17T13:03:01Zoai:periodicos.uem.br/ojs:article/3923Revistahttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/indexPUBhttps://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/oai||actatech@uem.br1807-86641806-2563opendoar:2024-05-17T13:03:01Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Evaluation of the photocatalytic activity of Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923
Avaliação da atividade fotocatalítica de Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923
title Evaluation of the photocatalytic activity of Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923
spellingShingle Evaluation of the photocatalytic activity of Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923
Santana, Veronice Slusarski
photocatalysis
NbO
impregnation
beads glass
sucrose
fotocatálise
Nb2O5
impregnação
esferas de vidro
sacarose
Tratamento e aproveitamento de rejeitos
title_short Evaluation of the photocatalytic activity of Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923
title_full Evaluation of the photocatalytic activity of Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923
title_fullStr Evaluation of the photocatalytic activity of Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923
title_full_unstemmed Evaluation of the photocatalytic activity of Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923
title_sort Evaluation of the photocatalytic activity of Nb2O5 - DOI: 10.4025/actascitechnol.v32i1.3923
author Santana, Veronice Slusarski
author_facet Santana, Veronice Slusarski
Mitushasi, Eduardo Ossamu
Fernandes-Machado, Nádia Regina Camargo
author_role author
author2 Mitushasi, Eduardo Ossamu
Fernandes-Machado, Nádia Regina Camargo
author2_role author
author
dc.contributor.author.fl_str_mv Santana, Veronice Slusarski
Mitushasi, Eduardo Ossamu
Fernandes-Machado, Nádia Regina Camargo
dc.subject.por.fl_str_mv photocatalysis
NbO
impregnation
beads glass
sucrose
fotocatálise
Nb2O5
impregnação
esferas de vidro
sacarose
Tratamento e aproveitamento de rejeitos
topic photocatalysis
NbO
impregnation
beads glass
sucrose
fotocatálise
Nb2O5
impregnação
esferas de vidro
sacarose
Tratamento e aproveitamento de rejeitos
description As heterogeneous photocatalysis has proved to be one of the most promising methods for the treatment of effluents, the study of photocatalytic activity of new catalysts is of great interest. Thus, degradation tests of burnt sugar solution were conducted through using 2 g of Nb2O5 and TiO2, massic, and Nb2O5 impregnated in glass beads (5.0, 10 and 15% Nb2O5 glass-1) under UV radiation for 168 hours. TiO2 and Nb2O5 were submitted to the agglomeration process (particle size: 0.210 and 0.297 mm) and calcined at 500ºC for 5h. Nb2O5 was solubilized in oxalic acid (0.5 mol L-1) at 70ºC for 8h, mixed with the glass beads, dried at 110ºC for 12h and calcined at 500ºC for 5h. The efficiency of the photocatalytic process was evaluated by UV-VIS spectrophotometry and DNS method. The results showed that catalysts of Nb2O5 are promising for application in photocatalysis, mainly 15% Nb2O5 glass-1, which presented similar results to TiO2.
publishDate 2009
dc.date.none.fl_str_mv 2009-11-13
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
catálise
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/3923
10.4025/actascitechnol.v32i1.3923
url http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/3923
identifier_str_mv 10.4025/actascitechnol.v32i1.3923
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciTechnol/article/view/3923/3923
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Estadual De Maringá
publisher.none.fl_str_mv Universidade Estadual De Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Technology; Vol 32 No 1 (2010); 55-61
Acta Scientiarum. Technology; v. 32 n. 1 (2010); 55-61
1806-2563
1807-8664
reponame:Acta scientiarum. Technology (Online)
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta scientiarum. Technology (Online)
collection Acta scientiarum. Technology (Online)
repository.name.fl_str_mv Acta scientiarum. Technology (Online) - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv ||actatech@uem.br
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