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Consequences of nitrogen doping and oxygen enrichment on titanium local order and photocatalytic performance of TiO2 anatase

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dc.affiliation.dptoUC3M. Departamento de Físicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Materiales avanzados para aplicaciones en energía solares
dc.contributor.authorKrivtsov, Igor
dc.contributor.authorIlkaeva, Marina
dc.contributor.authorSalas Colera, Eduardo
dc.contributor.authorAmghouz, Zakariae
dc.contributor.authorGarcía, José R.
dc.contributor.authorDíaz, Eva
dc.contributor.authorOrdoñez, Salvador
dc.contributor.authorVillar-Rodil, Silvia
dc.contributor.funderMinisterio de Economía y Competitividad (España)es
dc.date.accessioned2023-01-17T08:08:48Z
dc.date.available2023-01-17T08:08:48Z
dc.date.issued2017-03-30
dc.description.abstractExtended X-ray absorption fine structure (EXAFS) investigation of the oxygen-rich titania formed via the thermal treatment of N-doped TiO2 has revealed that the removal of N-dopants is responsible for the creation of defect sites in the titanium environment, thus triggering at high temperatures (500-800 °C) the capture of atmospheric oxygen followed by its diffusion toward the vacant sites and formation of interstitial oxygen species. The effect of the dopants on Ti coordination number and Ti-Oint and Ti-Nint bond distances has been estimated. The photocatalytic p-cresol degradation tests have demonstrated that the interband states formed by the N-dopants contribute to a greater extent to the visible-light activity than the oxygen interstitials do. However, under the UV irradiation the oxygen-rich titania shows higher efficiency in the pollutant degradation, while the N-dopants in N-TiO2 play the role of recombination sites. The presence of the surface nitrogen species in TiO2 is highly beneficial for the application in partial photooxidation reactions, where N-TiO2 demonstrates a superior selectivity of 5-hydroxymethyl furfural (HMF) oxidation to 2,5-furandicarboxaldehyde (FDC). Thus, this work underlines the importance of a rational design of nonmetal doped titania for photocatalytic degradation and partial oxidation applications, and it establishes the role of bulk defects and surface dopants on the TiO2 photooxidation performance.en
dc.description.sponsorshipThis work was financially supported by Spanish MINECO (MAT2013-40950-R, MAT2016-78155-C2-1-R, and CTQ2014-52956-C3-1-R), Gobierno del Principado de Asturias (GRUPIN14-060 and GRUPIN14-078), FEDER and South Ural State University thanks for the support the Ministry of Education and Science of the Russian Federation (grant No 16.2674.2014/K).en
dc.format.extent11
dc.identifier.bibliographicCitationKrivtsov, I., Ilkaeva, M., Salas-Colera, E., Amghouz, Z., García, J. R., Díaz, E., Ordoñez, S. & Villar-Rodil, S. (2017). Consequences of nitrogen doping and oxygen enrichment on titanium local order and photocatalytic performance of TiO2 anatase. Journal of Physical Chemistry C, 121(12), 6770-6780.en
dc.identifier.doihttps://doi.org/10.1021/acs.jpcc.7b00354
dc.identifier.issn1932-7447
dc.identifier.publicationfirstpage6770
dc.identifier.publicationissue12
dc.identifier.publicationlastpage6780
dc.identifier.publicationtitleJournal of Physical Chemistry Cen
dc.identifier.publicationvolume121
dc.identifier.urihttps://hdl.handle.net/10016/36276
dc.identifier.uxxiAR/0000027044
dc.language.isoeng
dc.publisherAmerican Chemical Society (ACS)en
dc.relation.projectIDGobierno de España. MAT2013-40950-Res
dc.relation.projectIDGobierno de España. MAT2016-78155-C2-1-Res
dc.relation.projectIDGobierno de España. CTQ2014-52956-C3-1-Res
dc.rights© 2017 American Chemical Societyen
dc.rights.accessRightsopen accessen
dc.subject.ecienciaEnergías Renovableses
dc.subject.otherMaterialsen
dc.subject.otherMineralsen
dc.subject.otherNitrogenen
dc.subject.otherOxidesen
dc.subject.otherOxygenen
dc.titleConsequences of nitrogen doping and oxygen enrichment on titanium local order and photocatalytic performance of TiO2 anataseen
dc.typeresearch article*
dc.type.hasVersionAM*
dspace.entity.typePublication
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