Influence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubes

Detalhes bibliográficos
Autor(a) principal: Bem, V.
Data de Publicação: 2012
Outros Autores: Neves, M. C., Nunes, M. R., Silvestre, António Jorge, Monteiro, O. C.
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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spelling 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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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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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