Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , |
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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Cerâmica (São Paulo. Online) |
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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 |
_version_ |
1748936784673243136 |