Improved photocatalytic and antibacterial performance of Cr doped TiO2 nanoparticles

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dc.contributor.authorGómez Polo, Cristina
dc.contributor.authorLarumbe Abuin, Silvia
dc.contributor.authorGil Bravo, Antonio
dc.contributor.authorMuñoz Labiano, Delia
dc.contributor.authorRodríguez Fernández, L.
dc.contributor.authorFernández Barquín, Luis
dc.contributor.authorGarcía-Prieto, Ana
dc.contributor.authorFernández-Gubieda, María Luisa
dc.contributor.authorMuela, Alicia
dc.contributor.departmentZientziakeu
dc.contributor.departmentInstitute for Advanced Materials and Mathematics - INAMAT2en
dc.contributor.departmentCienciases_ES
dc.date.accessioned2021-09-16T07:16:29Z
dc.date.available2023-02-01T00:00:13Z
dc.date.issued2021
dc.description.abstractThe effect of Cr and N doping in the adsorption capacity, photocatalytic properties and antibacterial response of TiO2 anatase nanoparticles is analyzed. The nanoparticles (N-TiO2, Cr-TiO2 and Cr/N-TiO2) were prepared by the sol-gel method. The structural (X-ray diffraction and TEM) and magnetic (SQUID magnetometry) characterization confirms the nanosized nature of the anatase nanoparticles and the absence of secondary phases. The enhancement of the adsorption capacity of the dye (methyl orange) on the surface of the catalysts for the Cr and Cr/N doped samples, together with the redshift of the UV-Vis absorbance spectra promote a high photocatalytic performance under visible light in these nanocatalysts. The culturability and viability of the Escherichia coli DH5α in a medium supplemented with the nanoparticles was characterized and compared with the evolution under visible light (both without and with nanoparticles). The results show that Cr-TiO2 nanoparticles under visible light display antibacterial activity that cannot be accounted by the toxicity of the nanoparticles alone. However the antibacterial effect is not observed in N-TiO2 and Cr/N-TiO2. The differences in the electrostatic charge (isoelectric point) and the degree of nanoparticle dispersion are invoked as the main origins of the different antibacterial response in the Cr-TiO2 nanoparticles.en
dc.description.sponsorshipThe Spanish and Basque Governments are acknowledged for funding under projects MAT2017-83631-C3-R and IT-1245-19, respectively. A. Gil is also grateful for financial support from Santander Bank through the Research Intensification Program.en
dc.embargo.lift2023-02-01
dc.embargo.terms2023-02-01
dc.format.extent32 p.
dc.format.mimetypeapplication/pdfen
dc.identifier.doi10.1016/j.surfin.2020.100867
dc.identifier.issn2468-0230
dc.identifier.urihttps://academica-e.unavarra.es/handle/2454/40512
dc.language.isoengen
dc.publisherElsevieren
dc.relation.ispartofSurfaces and Interfaces, 22 (2021) 100867en
dc.relation.projectIDinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2017-83631-C3-1-R/ES/
dc.relation.publisherversionhttps://doi.org/10.1016/j.surfin.2020.100867
dc.rights© 2020 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0en
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectAntibacterialen
dc.subjectDoped titanium oxideen
dc.subjectNanoparticlesen
dc.subjectPhotocatalysisen
dc.subjectSol-gel methoden
dc.titleImproved photocatalytic and antibacterial performance of Cr doped TiO2 nanoparticlesen
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/acceptedVersion
dspace.entity.typePublication
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relation.isAuthorOfPublicationa65f5238-3c22-46ad-a982-34cf82016864
relation.isAuthorOfPublicationcd12e590-cb42-47d5-a642-f60eeee624ec
relation.isAuthorOfPublicationcc878517-e4e6-491d-a424-b6e9ada5a61e
relation.isAuthorOfPublication.latestForDiscovery5000e1d8-9426-4c7b-a770-586dbd2b2875

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