Nitrogen Doping of TiO2 Photocatalyst Forms a Second eg State in the Oxygen 1s NEXAFS Pre-edge

被引：68

作者：

Braun, Artur ^{[1
]}

Akurati, Kranthi K. ^{[1
]}

Fortunato, Giuseppino ^{[2
]}

Reifler, Felix A. ^{[2
]}

Ritter, Axel ^{[2
]}

Harvey, Ashley S. ^{[3
]}

Vital, Andri ^{[1
]}

Graule, Thomas ^{[1
,4
]}

机构：

[1] Swiss Fed Labs Mat Testing & Res, EMPA, Lab High Performance Ceram, CH-8600 Dubendorf, Switzerland

[2] Swiss Fed Labs Mat Testing & Res, EMPA, Lab Adv Fibers, CH-9014 St Gallen, Switzerland

[3] Swiss Fed Inst Technol, ETH Zurich, Dept Mat Nonmetall Inorgan Mat, CH-8093 Zurich, Switzerland

[4] Tech Univ Bergakad Freiberg, D-09596 Freiberg, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 01期

关键词：

X-RAY-ABSORPTION; S-DOPED TIO2; ELECTRONIC-STRUCTURE; TITANIUM-OXIDES; NANOMATERIALS;

D O I：

10.1021/jp908875t

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：516 / 519

页数：4

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