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Synthesis and properties of Co-doped titanate nanotubes and their optical sensitization with methylene blue

2013-10-15Journal article Restricted access
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dc.contributor.authorFerreira, V. C.
dc.contributor.authorNunes, M. R.
dc.contributor.authorSilvestre, António Jorge
dc.contributor.authorMonteiro, O. C.
dc.date.accessioned2014-09-16T19:35:27Z
dc.date.available2014-09-16T19:35:27Z
dc.date.issued2013-10-15
dc.descriptionAgência Financiadora - Fundação para a Ciência e Tecnologia - PTDC/CTM NAN/113021/2009por
dc.description.abstractHere we report on a novel chemical route to synthesize homogenous cobalt-doped titanate nanotubes (CoTNT), using an amorphous Co-doped precursor. The influence of the synthesis temperature, autoclave dwell time and metal doping on the structural and microstructural as well as on the optical properties of the synthesized titanate nanotubes is studied and discussed. The optical band gaps of the CoTNT samples are red shifted in comparison with the values determined for the undoped samples, such red shifts bringing the absorption edge of the CoTNT samples into the visible region. CoTNT materials also demonstrate particular high adsorption ability for methylene blue, the amount of the adsorbed dye being higher than the one predictable for a monolayer formation. This suggests the possibility of intercalation of the dye molecule between the TiO6 layers of the TNT structure. It is also shown that the methylene blue sensitized Co-doped nanostructures are highly stable under UV radiation and present a strong and broad absorption in the visible region. (C) 2013 Elsevier B.V. All rights reserved.por
dc.identifier.citationFERREIRA, V. C.; NUNES, M. R.; SILVESTRE, A. J.; MONTEIRO, O. C. - Synthesis and properties of Co-doped titanate nanotubes and their optical sensitization with methylene blue. Materials Chemistry and Physics. Vol. 142, nr. 1 (2013), p. 355-362.por
dc.identifier.doi10.1016/j.matchemphys.2013.07.029
dc.identifier.issn0254-0584
dc.identifier.urihttp://hdl.handle.net/10400.21/3811
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevier Science SApor
dc.relation.publisherversionhttp://arxiv.org/ftp/arxiv/papers/1308/1308.5652.pdfpor
dc.subjectNanostructurespor
dc.subjectOptical propertiespor
dc.subjectSurface propertiespor
dc.subjectSemiconductorspor
dc.titleSynthesis and properties of Co-doped titanate nanotubes and their optical sensitization with methylene bluepor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceLausannepor
oaire.citation.endPage362por
oaire.citation.issue1por
oaire.citation.startPage355por
oaire.citation.titleMaterials Chemistry and Physicspor
oaire.citation.volume142por
person.familyNameSilvestre
person.givenNameAntónio Jorge
person.identifier.orcid0000-0001-6517-6275
person.identifier.scopus-author-id25224208600
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicationda27d795-d2eb-4f8c-bfa5-7053ef20f339
relation.isAuthorOfPublication.latestForDiscoveryda27d795-d2eb-4f8c-bfa5-7053ef20f339

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