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

2012-03-15Journal article Restricted access
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dc.contributor.authorBem, V.
dc.contributor.authorNeves, M. C.
dc.contributor.authorNunes, M. R.
dc.contributor.authorSilvestre, António Jorge
dc.contributor.authorMonteiro, O. C.
dc.date.accessioned2015-09-10T11:47:39Z
dc.date.available2015-09-10T11:47:39Z
dc.date.issued2012-03-15
dc.description.abstractTitanate 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.por
dc.identifier.citationBEM, 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. 50-56por
dc.identifier.doi10.1016/j.jphotochem.2012.02.002
dc.identifier.issn1010-6030
dc.identifier.urihttp://hdl.handle.net/10400.21/5152
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Science SApor
dc.relationFCT - PTDC/CTM-NAN/113021/2009
dc.relationStrategic Project - UI 612 - 2011-2012
dc.subjectTitanate Nanotubes
dc.subjectSodium/Proton Exchange
dc.subjectBand Gap Energy
dc.subjectPhotocatalysis
dc.subjectRhodamine 6G
dc.titleInfluence of the Sodium/Proton replacement on the structural, morphological and photocatalytic properties of titanate nanotubespor
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleStrategic Project - UI 612 - 2011-2012
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/PEst-OE%2FQUI%2FUI0612%2F2011/PT
oaire.citation.conferencePlaceLausanne
oaire.citation.endPage56por
oaire.citation.issue10por
oaire.citation.startPage50por
oaire.citation.titleJournal of Photochemistry and Photobiology A: Chemistrypor
oaire.citation.volume232por
oaire.fundingStream6817 - DCRRNI ID
person.familyNameSilvestre
person.givenNameAntónio Jorge
person.identifier.orcid0000-0001-6517-6275
person.identifier.scopus-author-id25224208600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationda27d795-d2eb-4f8c-bfa5-7053ef20f339
relation.isAuthorOfPublication.latestForDiscoveryda27d795-d2eb-4f8c-bfa5-7053ef20f339
relation.isProjectOfPublicatione0b61a79-a583-463b-9be1-4c0146514063
relation.isProjectOfPublication.latestForDiscoverye0b61a79-a583-463b-9be1-4c0146514063

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