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Enhanced UV Flexible Photodetectors and Photocatalysts Based on TiO2 Nanoplatforms

2018-10-01Artigo científico Acesso aberto
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dc.contributor.authorNunes, D.
dc.contributor.authorPimentel, A.
dc.contributor.authorAraújo, A.
dc.contributor.authorCalmeiro, T. R.
dc.contributor.authorPanigrahi, S.
dc.contributor.authorPinto, J. V.
dc.contributor.authorBarquinha, P.
dc.contributor.authorGama, M.
dc.contributor.authorFortunato, E.
dc.contributor.authorMartins, R.
dc.contributor.institutionCENIMAT-i3N - Centro de Investigação de Materiais (Lab. Associado I3N)
dc.contributor.institutionDCM - Departamento de Ciência dos Materiais
dc.contributor.institutionUNINOVA-Instituto de Desenvolvimento de Novas Tecnologias
dc.contributor.pblSpringer Verlag
dc.date.accessioned2019-04-24T22:20:12Z
dc.date.available2019-04-24T22:20:12Z
dc.date.issued2018-10-01
dc.descriptionThe work was supported by the FCT-Portuguese Foundation for Science and Technology, through the scholarship BPD/84215/2012. This work is also funded by FEDER funds through the COMPETE 2020 Program and National Funds through FCT -Portuguese Foundation for Science and Technology under the project number POCI-01-0145-FEDER-007688, Reference UID/CTM/50025/2013. The Center of Biological Engineering acknowledges funding through UID/BIO/04469/2013 unit and COMPETE 2020 (POCI-01-0145-FEDER-006684).
dc.description.abstractAbstract: In this study, titanium dioxide (TiO2) nanostructured films were synthesized under microwave irradiation through low temperature synthesis (80 °C) and integrated in ultraviolet (UV) photodetectors and as photocatalysts. Bacterial nanocellulose (BNC), tracing paper, and polyester film were tested as substrates, since they are inexpensive, flexible, recyclable, lightweight, and when associated to low temperature synthesis and absence of a seed layer, they become suitable for several low-cost applications. The nanostructured TiO2 films and substrates were structurally characterized by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy, X-ray diffraction, and Raman spectroscopy. The optical properties of all materials were investigated. The TiO2 nanostructured films were implemented as a photoactive layer of UV photodetectors and demonstrated significant increase of conductance upon exposed to UV irradiation. The photodetection behaviour of each material was investigated by in-situ Kelvin probe force microscopy experiments, in which the contact potential difference varied under dark or UV irradiation conditions, demonstrating higher shift for the BNC-based UV photodetector. Photocatalytic activity of the films was assessed from rhodamine B degradation under solar radiation, and BNC based devices revealed to be the best photocatalyst. The structural characteristics of the TiO2 films and substrates were correlated to the differences in the UV photodetection and photocatalytic performances. Graphical Abstract: [Figure not available: see fulltext.]en
dc.description.versionauthorsversion
dc.description.versionpublished
dc.format.extent16
dc.format.extent2239049
dc.identifier.doi10.1007/s11244-018-0968-4
dc.identifier.issn1022-5528
dc.identifier.otherPURE: 5584692
dc.identifier.otherPURE UUID: 6e31787a-4605-44d2-a7bc-cf6b0ee5ce3e
dc.identifier.otherScopus: 85045908248
dc.identifier.otherWOS: 000451216500011
dc.identifier.otherORCID: /0000-0002-4202-7047/work/56430033
dc.identifier.otherORCID: /0000-0003-0847-7711/work/69844585
dc.identifier.otherORCID: /0000-0003-3115-6588/work/91301568
dc.identifier.urihttp://www.scopus.com/inward/record.url?scp=85045908248&partnerID=8YFLogxK
dc.identifier.urlhttps://www.scopus.com/pages/publications/85045908248
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F84215%2F2012/PT
dc.relationDESIGN OF NEW FUNCTIONAL MATERIALS FOR ELECTRONICS APPLICATIONS
dc.relationinfo:eu-repo/grantAgreement/FCT/5876/147337/PT
dc.subjectFlexible substrates
dc.subjectLow-cost devices
dc.subjectMicrowave irradiation
dc.subjectTiO nanostructured films
dc.subjectUV photodetectors
dc.subjectCatalysis
dc.subjectGeneral Chemistry
dc.titleEnhanced UV Flexible Photodetectors and Photocatalysts Based on TiO2 Nanoplatformsen
dc.typejournal article
degois.publication.firstPage1591
degois.publication.issue15-17
degois.publication.lastPage1606
degois.publication.titleTopics in Catalysis
degois.publication.volume61
dspace.entity.typePublication
oaire.awardNumberSFRH/BPD/84215/2012
oaire.awardNumberUID/CTM/50025/2013
oaire.awardNumberUID/BIO/04469/2013
oaire.awardTitleDESIGN OF NEW FUNCTIONAL MATERIALS FOR ELECTRONICS APPLICATIONS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F84215%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FCTM%2F50025%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FBIO%2F04469%2F2013/PT
oaire.fundingStream5876
oaire.fundingStream5876
project.funder.identifierhttp://doi.org/10.13039/501100001871
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
rcaap.rightsopenAccess
relation.isProjectOfPublication60962510-3787-4407-a250-17a0346d09a8
relation.isProjectOfPublicationd94394ca-c419-4430-9491-83be2361e7a8
relation.isProjectOfPublication2ae2a3d7-6188-48ce-80dd-0ddcd02567f5
relation.isProjectOfPublication.latestForDiscoveryd94394ca-c419-4430-9491-83be2361e7a8

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