Repository logo
 
Publication

Novel titanate nanotubes-cyanocobalamin materials: Synthesis and enhanced photocatalytic properties for pollutants removal

2017-01Journal article Restricted access
Simple item page
dc.contributor.authorSilva, T. A.
dc.contributor.authorDiniz, J.
dc.contributor.authorPaixio, L.
dc.contributor.authorVieira, Bernardete
dc.contributor.authorBarrocas, B.
dc.contributor.authorNunes, C. D.
dc.contributor.authorMonteiro, O. C.
dc.date.accessioned2019-11-20T15:08:05Z
dc.date.available2019-11-20T15:08:05Z
dc.date.issued2017-01
dc.description.abstractNew hybrid nanomaterials, with improved photocatalytic performance in pollutants removal, were obtained through the modification of titanate nanotubes (TNT) with a cobalt porphyrin, the cyanocobalamin, also knowing as vitamin B12 (812). The nanocrystalline TNT were produced by hydrothermal treatment and after treated with cobalamin to produce B12-TNT materials. The characterization of the new hybrid material was performed by XRD, FTIR, TEM-EDS, DRS, XPS and ICP. The results show that the immobilization of the cobalt containing specie is dependent on the point of zero charge of the TNT and no modifications on the structure and morphology were observed. No significant changes in the optical band gap were observed after B12 incorporation, but an increasing in the visible light absorption, which arises from charge transfer and d-d transitions of the cobalt, was visualized. The samples photocatalytic performance was studied for the hydroxyl radical production and the highest catalytic ability was achieved by the B12-HTNT sample. The catalytic ability of these new hybrid nanomaterials for two model pollutants photodegradation, phenol and rhodamine B (RhB) was investigated. For both pollutants, the best results were achieved using B12-HTNT with a removal of 94% of a 10 ppm RhB and 87% of a 20 ppm phenol solution in 90 min of irradiation (150 mL, 0.2 g catalyst/L). (C) 2016 Elsevier Masson SAS. All rights reserved.
dc.description.sponsorshipFundacao para a Ciencia e a Tecnologia [PTDC/CTM-NAN/113021/2009, DID/MULTI/ 00612/2013, IF/01210/2014]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.solidstatesciences.2016.11.008
dc.identifier.issn1293-2558
dc.identifier.issn1873-3085
dc.identifier.urihttp://hdl.handle.net/10400.1/13356
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier Science
dc.relationTitanate nanotubes photosensitization by narrow bandgap semicondutor nanoparticles
dc.subjectB-12-Tio2 hybrid catalyst
dc.subjectVisible-light
dc.subjectRhodamine-b
dc.subjectTio2 nanoparticles
dc.subjectOptical-Ppoperties
dc.subjectElectron-transfer
dc.subjectVitamin-B-12
dc.subjectPhotodegradation
dc.subjectNanostructures
dc.subjectDegradation
dc.titleNovel titanate nanotubes-cyanocobalamin materials: Synthesis and enhanced photocatalytic properties for pollutants removal
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleTitanate nanotubes photosensitization by narrow bandgap semicondutor nanoparticles
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FCTM-NAN%2F113021%2F2009/PT
oaire.citation.endPage41
oaire.citation.startPage30
oaire.citation.titleSolid State Sciences
oaire.citation.volume63
oaire.fundingStream3599-PPCDT
person.familyNameVieira
person.givenNameBernardete
person.identifier.orcid0000-0002-6284-006X
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication8556611a-59b4-45dc-b067-62b9b4387953
relation.isAuthorOfPublication.latestForDiscovery8556611a-59b4-45dc-b067-62b9b4387953
relation.isProjectOfPublication5e6bc3e1-2d4a-48e7-9b4c-a6243204300b
relation.isProjectOfPublication.latestForDiscovery5e6bc3e1-2d4a-48e7-9b4c-a6243204300b

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
1-s2.0-S1293255816304381-main.pdf
Size:
2.72 MB
Format:
Adobe Portable Document Format
Download

Collections

CCM2-Artigos (em revistas ou actas indexadas)