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Author Senga, Junya ♦ Tatsumi, Kazuyoshi ♦ Muto, Shunsuke ♦ Yoshida, Tomoko
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ABSORPTION SPECTRA ♦ CARRIERS ♦ ELECTRONIC STRUCTURE ♦ NITROGEN IONS ♦ PHOTOCATALYSIS ♦ TITANIUM OXIDES ♦ TRAPS ♦ VISIBLE RADIATION ♦ X-RAY SPECTRA
Abstract It was found that the visible-light responsiveness of a nitrogen ion-implanted TiO{sub 2} photocatalyst was attributable to the predominant chemical states of nitrogen, depending on the local nitrogen concentration near the surface. In the present study, we examined the effects of conceivable nitrogen-related defects on the visible light responsiveness, based on electronic structures calculated from first principles. Possible chemical states were proposed by comparing previously reported experiments with the present theoretical N-K X-ray absorption spectra. The theoretically predicted visible light absorption spectra and carrier trap states due to the bandgap states associated with the defects well explained the relationship between the catalytic reactivity and the proposed chemical states.
ISSN 00218979
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-09-21
Publisher Place United States
Journal Journal of Applied Physics
Volume Number 118
Issue Number 11


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