Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method

Detalhes bibliográficos
Autor(a) principal: Nunes,T. B. O.
Data de Publicação: 2020
Outros Autores: Andrade Neto,N. F., Garcia,L. M. P., Nascimento,R. M., Bomio,M. R. D., Motta,F. V.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Cerâmica (São Paulo. Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132020000200145
Resumo: Abstract TiO2-CeO2 multilayer thin films were deposited by the spin coating method and calcined at 500 and 700 °C. Thin films were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), and diffuse reflectance spectroscopy. Photocatalytic properties were estimated by varying the concentration of the methylene blue dye (MB) when illuminated by UV radiation. The XRD patterns showed that the temperatures of 500 and 700 °C were effective to obtain TiO2 and CeO2 phases. The difference in the homogeneity of TiO2 and CeO2 films was evident in the AFM images, where the films showed an average roughness of 2.0 and 5.3 nm, respectively. The CeO2-TiO2 thin film obtained at 700 °C showed the best photocatalytic activity, reducing the concentration of MB by approximately 80%, while the CeO2 and TiO2 films obtained at 700 °C reduced only 20% and 29%, respectively. The reuse test showed that the thin films maintained their photocatalytic activity after 4 cycles, and there was no need for thermal treatment, indicating that it is an immobilized photocatalyst with high efficiency in the degradation of organic dyes.
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spelling Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating methodspin coatingmultilayer thin filmsCeO2-TiO2photocatalytic reuseAbstract TiO2-CeO2 multilayer thin films were deposited by the spin coating method and calcined at 500 and 700 °C. Thin films were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), and diffuse reflectance spectroscopy. Photocatalytic properties were estimated by varying the concentration of the methylene blue dye (MB) when illuminated by UV radiation. The XRD patterns showed that the temperatures of 500 and 700 °C were effective to obtain TiO2 and CeO2 phases. The difference in the homogeneity of TiO2 and CeO2 films was evident in the AFM images, where the films showed an average roughness of 2.0 and 5.3 nm, respectively. The CeO2-TiO2 thin film obtained at 700 °C showed the best photocatalytic activity, reducing the concentration of MB by approximately 80%, while the CeO2 and TiO2 films obtained at 700 °C reduced only 20% and 29%, respectively. The reuse test showed that the thin films maintained their photocatalytic activity after 4 cycles, and there was no need for thermal treatment, indicating that it is an immobilized photocatalyst with high efficiency in the degradation of organic dyes.Associação Brasileira de Cerâmica2020-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132020000200145Cerâmica v.66 n.378 2020reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/0366-69132020663782772info:eu-repo/semantics/openAccessNunes,T. B. O.Andrade Neto,N. F.Garcia,L. M. P.Nascimento,R. M.Bomio,M. R. D.Motta,F. V.eng2020-05-04T00:00:00Zoai:scielo:S0366-69132020000200145Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2020-05-04T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method
title Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method
spellingShingle Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method
Nunes,T. B. O.
spin coating
multilayer thin films
CeO2-TiO2
photocatalytic reuse
title_short Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method
title_full Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method
title_fullStr Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method
title_full_unstemmed Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method
title_sort Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method
author Nunes,T. B. O.
author_facet Nunes,T. B. O.
Andrade Neto,N. F.
Garcia,L. M. P.
Nascimento,R. M.
Bomio,M. R. D.
Motta,F. V.
author_role author
author2 Andrade Neto,N. F.
Garcia,L. M. P.
Nascimento,R. M.
Bomio,M. R. D.
Motta,F. V.
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Nunes,T. B. O.
Andrade Neto,N. F.
Garcia,L. M. P.
Nascimento,R. M.
Bomio,M. R. D.
Motta,F. V.
dc.subject.por.fl_str_mv spin coating
multilayer thin films
CeO2-TiO2
photocatalytic reuse
topic spin coating
multilayer thin films
CeO2-TiO2
photocatalytic reuse
description Abstract TiO2-CeO2 multilayer thin films were deposited by the spin coating method and calcined at 500 and 700 °C. Thin films were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), and diffuse reflectance spectroscopy. Photocatalytic properties were estimated by varying the concentration of the methylene blue dye (MB) when illuminated by UV radiation. The XRD patterns showed that the temperatures of 500 and 700 °C were effective to obtain TiO2 and CeO2 phases. The difference in the homogeneity of TiO2 and CeO2 films was evident in the AFM images, where the films showed an average roughness of 2.0 and 5.3 nm, respectively. The CeO2-TiO2 thin film obtained at 700 °C showed the best photocatalytic activity, reducing the concentration of MB by approximately 80%, while the CeO2 and TiO2 films obtained at 700 °C reduced only 20% and 29%, respectively. The reuse test showed that the thin films maintained their photocatalytic activity after 4 cycles, and there was no need for thermal treatment, indicating that it is an immobilized photocatalyst with high efficiency in the degradation of organic dyes.
publishDate 2020
dc.date.none.fl_str_mv 2020-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132020000200145
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132020000200145
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/0366-69132020663782772
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Associação Brasileira de Cerâmica
publisher.none.fl_str_mv Associação Brasileira de Cerâmica
dc.source.none.fl_str_mv Cerâmica v.66 n.378 2020
reponame:Cerâmica (São Paulo. Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Cerâmica (São Paulo. Online)
collection Cerâmica (São Paulo. Online)
repository.name.fl_str_mv Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv ceram.abc@gmail.com||ceram.abc@gmail.com
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