Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.21/5152 |
Resumo: | Titanate nanotubes (TNT) with different sodium contents have been synthesised using a hydrothermal approach and a swift and highly controllable post-washing processes. The influence of the sodium/proton replacement on the structural and morphological characteristics of the prepared materials was analysed. Different optical behaviour was observed depending on the Na+/H+ samples’ content. A band gap energy of 3.27±0.03 eV was estimated for the material with higher sodium content while a value of 2.81±0.02 eV was inferred for the most protonated material, which therefore exhibits an absorption edge in the near visible region. The point of zero charge of the materials was determined and the influence of the sodium content on the adsorption of both cationic and anionic organic dyes was studied. The photocatalytic performance of the TNT samples was evaluated in the rhodamine 6G degradation process. Best photodegradation results were obtained when using the most protonated material as catalyst, although this material has shown the lowest R6G adsorption capability. |
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Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubesTitanate NanotubesSodium/Proton ExchangeBand Gap EnergyPhotocatalysisRhodamine 6GTitanate nanotubes (TNT) with different sodium contents have been synthesised using a hydrothermal approach and a swift and highly controllable post-washing processes. The influence of the sodium/proton replacement on the structural and morphological characteristics of the prepared materials was analysed. Different optical behaviour was observed depending on the Na+/H+ samples’ content. A band gap energy of 3.27±0.03 eV was estimated for the material with higher sodium content while a value of 2.81±0.02 eV was inferred for the most protonated material, which therefore exhibits an absorption edge in the near visible region. The point of zero charge of the materials was determined and the influence of the sodium content on the adsorption of both cationic and anionic organic dyes was studied. The photocatalytic performance of the TNT samples was evaluated in the rhodamine 6G degradation process. Best photodegradation results were obtained when using the most protonated material as catalyst, although this material has shown the lowest R6G adsorption capability.Elsevier Science SARCIPLBem, V.Neves, M. C.Nunes, M. R.Silvestre, António JorgeMonteiro, O. C.2015-09-10T11:47:39Z2012-03-152012-03-15T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/5152engBEM, V.; [et al] – Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes. Journal of Photochemistry and Photobiology A: Chemistry. ISSN: 1010-6030. Vol. 232, nr. 10 (2012), pp. 50-561010-603010.1016/j.jphotochem.2012.02.002metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-03T09:48:09Zoai:repositorio.ipl.pt:10400.21/5152Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:14:28.275829Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes |
title |
Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes |
spellingShingle |
Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes Bem, V. Titanate Nanotubes Sodium/Proton Exchange Band Gap Energy Photocatalysis Rhodamine 6G |
title_short |
Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes |
title_full |
Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes |
title_fullStr |
Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes |
title_full_unstemmed |
Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes |
title_sort |
Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes |
author |
Bem, V. |
author_facet |
Bem, V. Neves, M. C. Nunes, M. R. Silvestre, António Jorge Monteiro, O. C. |
author_role |
author |
author2 |
Neves, M. C. Nunes, M. R. Silvestre, António Jorge Monteiro, O. C. |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Bem, V. Neves, M. C. Nunes, M. R. Silvestre, António Jorge Monteiro, O. C. |
dc.subject.por.fl_str_mv |
Titanate Nanotubes Sodium/Proton Exchange Band Gap Energy Photocatalysis Rhodamine 6G |
topic |
Titanate Nanotubes Sodium/Proton Exchange Band Gap Energy Photocatalysis Rhodamine 6G |
description |
Titanate nanotubes (TNT) with different sodium contents have been synthesised using a hydrothermal approach and a swift and highly controllable post-washing processes. The influence of the sodium/proton replacement on the structural and morphological characteristics of the prepared materials was analysed. Different optical behaviour was observed depending on the Na+/H+ samples’ content. A band gap energy of 3.27±0.03 eV was estimated for the material with higher sodium content while a value of 2.81±0.02 eV was inferred for the most protonated material, which therefore exhibits an absorption edge in the near visible region. The point of zero charge of the materials was determined and the influence of the sodium content on the adsorption of both cationic and anionic organic dyes was studied. The photocatalytic performance of the TNT samples was evaluated in the rhodamine 6G degradation process. Best photodegradation results were obtained when using the most protonated material as catalyst, although this material has shown the lowest R6G adsorption capability. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-03-15 2012-03-15T00:00:00Z 2015-09-10T11:47:39Z |
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://hdl.handle.net/10400.21/5152 |
url |
http://hdl.handle.net/10400.21/5152 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
BEM, V.; [et al] – Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes. Journal of Photochemistry and Photobiology A: Chemistry. ISSN: 1010-6030. Vol. 232, nr. 10 (2012), pp. 50-56 1010-6030 10.1016/j.jphotochem.2012.02.002 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier Science SA |
publisher.none.fl_str_mv |
Elsevier Science SA |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799133402462420992 |