Please use this identifier to cite or link to this item: https://doi.org/10.1021/jp408798f
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dc.titleAtomic N modified rutile TiO2(110) surface layer with significant visible light photoactivity
dc.contributor.authorTao, J.
dc.contributor.authorYang, M.
dc.contributor.authorChai, J.W.
dc.contributor.authorPan, J.S.
dc.contributor.authorFeng, Y.P.
dc.contributor.authorWang, S.J.
dc.date.accessioned2014-10-16T09:16:20Z
dc.date.available2014-10-16T09:16:20Z
dc.date.issued2014-01-16
dc.identifier.citationTao, J., Yang, M., Chai, J.W., Pan, J.S., Feng, Y.P., Wang, S.J. (2014-01-16). Atomic N modified rutile TiO2(110) surface layer with significant visible light photoactivity. Journal of Physical Chemistry C 118 (2) : 994-1000. ScholarBank@NUS Repository. https://doi.org/10.1021/jp408798f
dc.identifier.issn19327447
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/95832
dc.description.abstractIt has been recently emphasized that the surface of a photocatalyst plays crucial roles on its photocatalytic performance. By nitridizing the top layer of the rutile TiO2(110) surface using reactive atomic N flux, we report direct experimental evidence of significantly enhanced photocatalytic activity under both ultraviolet (UV) and visible light irradiations. The visible light activity of a nitridized surface is found to be comparable to the UV light activity of the pristine surface. On the basis of X-ray photoemission spectroscopy (XPS) measurements and density-functional theory (DFT) calculations, top surface N doping efficiently narrows the local band gap, ∼2.0 eV, which accounts for the visible light activity. Under visible light excitation, nearly all free charges contribute to the photocatalytic reactions. The improvement of photocatalytic activity is attributed to the N 2p add-on shoulder at the valence band maximum (VBM) as well as the strong exchange-splitting at the surface that settles the N 2pz states inside the conduction band of the TiO2 matrix, which avails efficient charge transfer. © 2013 American Chemical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1021/jp408798f
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.doi10.1021/jp408798f
dc.description.sourcetitleJournal of Physical Chemistry C
dc.description.volume118
dc.description.issue2
dc.description.page994-1000
dc.identifier.isiut000330417100029
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