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The effect of ionic Co presence on the structural, optical and photocatalytic properties of modified cobalt–titanate nanotubes

2016-07-21Journal article Restricted access
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dc.contributor.authorBarrocas, B.
dc.contributor.authorSilvestre, António Jorge
dc.contributor.authorRolo, A. G.
dc.contributor.authorMonteiro, O. C.
dc.date.accessioned2016-08-04T11:31:07Z
dc.date.available2016-08-04T11:31:07Z
dc.date.issued2016-07-21
dc.description.abstractWith the aim of producing materials with enhanced optical and photocatalytic properties, titanate nanotubes (TNTs) modified by cobalt doping (Co-TNT) and by Na+ -> Co ion-exchange (TNT/Co) were successfully prepared by a hydrothermal method. The influence of the doping level and of the cobalt position in the TNT crystalline structure was studied. Although no perceptible influence of the cobalt ion position on the morphology of the prepared titanate nanotubes was observed, the optical behaviour of the cobalt modified samples is clearly dependent on the cobalt ions either substituting the Ti4+ ions in the TiO6 octahedra building blocks of the TNT structure (doped samples) or replacing the Na+ ions between the TiO6 interlayers (ion-exchange samples). The catalytic ability of these materials on pollutant photodegradation was investigated. First, the evaluation of hydroxyl radical formation using the terephthalic acid as a probe was performed. Afterwards, phenol, naphthol yellow S and brilliant green were used as model pollutants. Anticipating real world situations, photocatalytic experiments were performed using solutions combining these pollutants. The results show that the Co modified TNT materials (Co-TNT and TNT/Co) are good catalysts, the photocatalytic performance being dependent on the Co/Ti ratio and on the structural metal location. The Co(1%)-TNT doped sample was the best photocatalyst for all the degradation processes studied.pt_PT
dc.identifier.citationBARROCAS, B.; [et al.] - The effect of ionic Co presence on the structural, optical and photocatalytic properties of modified cobalt–titanate nanotubes. Physical Chemistry Chemical Physics. ISSN 1463-9076. Vol. 18, N.º 27 (2016), 18081-18093.pt_PT
dc.identifier.doi10.1039/c6cp01889kpt_PT
dc.identifier.issn1463-9076
dc.identifier.issn1463-9084
dc.identifier.urihttp://hdl.handle.net/10400.21/6340
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherRoyal Society of Chemistrypt_PT
dc.relationTitanate nanotubes photosensitization by narrow bandgap semicondutor nanoparticles
dc.relationDetection and degradation of PPCPs using new functionalized titanate nanotubes as catalysts
dc.relation.publisherversionhttp://pubs.rsc.org/en/Content/ArticleLanding/2016/CP/C6CP01889K#!divAbstractpt_PT
dc.subjectVisible-lightpt_PT
dc.subjectDoped TIO2pt_PT
dc.subjectTitanium-dioxidept_PT
dc.subjectSurface sciencept_PT
dc.subjectMethylene-bluept_PT
dc.subjectSolar-cellspt_PT
dc.subjectNanoparticlespt_PT
dc.subjectFilmspt_PT
dc.subjectPhotodegradationpt_PT
dc.subjectPhotoreactivitypt_PT
dc.titleThe effect of ionic Co presence on the structural, optical and photocatalytic properties of modified cobalt–titanate nanotubespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleTitanate nanotubes photosensitization by narrow bandgap semicondutor nanoparticles
oaire.awardTitleDetection and degradation of PPCPs using new functionalized titanate nanotubes as catalysts
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTM-NAN%2F113021%2F2009/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F00612%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FCTM%2F04540%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FFIS%2F04650%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F101220%2F2014/PT
oaire.citation.endPage18093pt_PT
oaire.citation.issue27pt_PT
oaire.citation.startPage18081pt_PT
oaire.citation.volume18pt_PT
oaire.fundingStream3599-PPCDT
oaire.fundingStream5876
oaire.fundingStream5876
oaire.fundingStream5876
oaire.fundingStreamOE
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.identifierhttp://doi.org/10.13039/501100001871
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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