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Nitrogen Doping of TiO2 Photocatalyst Forms a Second e(g) State in the Oxygen 1s NEXAFS Pre-edge

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Braun Artur, Akurati Kranthi K., Fortunato Giuseppino, Reifler Felix A., Ritter Axel, Harvey Ashley S., Vital Andri, Graule Thomas,
Project Fundamental Aspects of Photocatalysis and Photoelectrochemistry / Basic Research Instrumentation for Functional Characterization
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Original article (peer-reviewed)

Journal JOURNAL OF PHYSICAL CHEMISTRY C
Volume (Issue) 114(1)
Page(s) 516 - 519
Title of proceedings JOURNAL OF PHYSICAL CHEMISTRY C
DOI 10.1021/jp908875t

Abstract

Close inspection of the pre-edge in oxygen near-edge X-ray absorption fine structure spectra of single-step, gas-phase-synthesized titanium oxynitride photocatalysts with 20 nm particle size reveals an additional e(g) resonance in the valence band that went unnoticed in previous TiO2 anion doping studies. The relative spectral weight of this Ti(3d)-O(2p) hybridized state with respect to and located between the readily established t(2g) and e(g) resonances scales qualitatively with the photocatalytic decomposition power, suggesting that this extra resonance bears co-responsibility for the photocatalytic performance of titanium oxynitrides at visible light wavelengths.
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