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Photonic band gap and bactericide performance of amorphous sol-gel titania

2018-07-10Artigo científico Acesso aberto
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dc.contributor.authorGonçalves, M. Clara
dc.contributor.authorPereira, José Carlos
dc.contributor.authorMatos, Joana C.
dc.contributor.authorVasconcelos, Helena Cristina
dc.contributor.institutionCeFITec – Centro de Física e Investigação Tecnológica
dc.contributor.pblMDPI - Multidisciplinary Digital Publishing Institute
dc.date.accessioned2022-12-16T22:07:50Z
dc.date.available2022-12-16T22:07:50Z
dc.date.issued2018-07-10
dc.description
dc.description.abstractIn addition to its traditional application in white pigments, nanocrystalline titania (TiO 2 ) has optoelectronic and photocatalytic properties (strongly dependent on crystallinity, particle size, and surface structure) that grant this naturally occurring oxide new technological applications. Sol-gel is one of the most widely used methods to synthesize TiO 2 films and NPs, but the products obtained (mostly oxy-hydrated amorphous phases) require severe heat-treatments to promote crystallization, in which control over size and shape is difficult to achieve. In this work, we obtained new photocatalytic materials based on amorphous titania and measured their electronic band gap. Two case studies are reported that show the enormous potential of amorphous titania as bactericide or photocatalyst. In the first, amorphous sol-gel TiO 2 thin films doped with N (TiO 2−x N x , x = 0.75) were designed to exhibit a photonic band gap in the visible region. The identification of Ti-O-N and N-Ti-O bindings was achieved by XPS. The photonic band gaps were found to be 3.18 eV for a-TiO 2 and 2.99 eV for N-doped a-TiO 2 . In the second study, amorphous titania and amine-functionalized amorphous titania nanoparticles were synthetized using a novel base-catalysed sol-gel methodology. All the synthesized amorphous TiO 2 nanoparticles exhibit bactericide performance (E. coli, ASTME 2149-13).en
dc.description.versionpublishersversion
dc.description.versionpublished
dc.format.extent20
dc.format.extent3653122
dc.identifier.doi10.3390/molecules23071677
dc.identifier.otherPURE: 13655719
dc.identifier.otherPURE UUID: 6cdab73a-43ad-4d8f-824d-675eb38615a0
dc.identifier.otherScopus: 85055613086
dc.identifier.otherPubMed: 29996500
dc.identifier.otherPubMedCentral: PMC6100469
dc.identifier.otherWOS: 000445301800180
dc.identifier.urihttp://hdl.handle.net/10362/146321
dc.identifier.urlhttps://www.scopus.com/pages/publications/85055613086
dc.language.isoeng
dc.peerreviewedyes
dc.relationinfo:eu-repo/grantAgreement/FCT/5876/147273/PT
dc.relationinfo:eu-repo/grantAgreement/FCT/5876/147216/PT
dc.relationinfo:eu-repo/grantAgreement/FCT/5876/147412/PT
dc.subjectAmorphous-TiO
dc.subjectBactericide
dc.subjectE. coli
dc.subjectFilms
dc.subjectNPs
dc.subjectPhotonic band-gap
dc.subjectSol-gel
dc.subjectAnalytical Chemistry
dc.subjectChemistry (miscellaneous)
dc.subjectMolecular Medicine
dc.subjectPharmaceutical Science
dc.subjectDrug Discovery
dc.subjectPhysical and Theoretical Chemistry
dc.subjectOrganic Chemistry
dc.titlePhotonic band gap and bactericide performance of amorphous sol-gel titaniaen
dc.title.subtitleAn Alternative to crystalline TiO 2en
dc.typejournal article
degois.publication.issue7
degois.publication.titleMolecules
degois.publication.volume23
dspace.entity.typePublication
oaire.awardNumberUID/AMB/50017/2013
oaire.awardNumberUID/QUI/00100/2013
oaire.awardNumberUID/FIS/00068/2013
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FAMB%2F50017%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FQUI%2F00100%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FFIS%2F00068%2F2013/PT
oaire.fundingStream5876
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
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relation.isProjectOfPublication.latestForDiscovery8cef5a46-69a9-42a0-a449-8c44acd9d1ea

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