EPR study of the illumination effect on properties of paramagnetic centers in nitrogen-doped TiO2 active in visible light photocatalysis

• Published in: Applied magnetic resonance Vol. 35; no. 3; pp. 421 - 427
• Main Authors: Konstantinova, E. A., Kokorin, Aleksandr I., Lips, K., Sakthivel, S., Kisch, H.
• Format: Journal Article
• Language: English
• Published: Vienna Springer Vienna 01.04.2009; Springer Nature B.V
• Subjects: Atoms and Molecules in Strong Fields; Catalytic activity; Electron paramagnetic resonance; Illumination; Laser Matter Interaction; Light; Light irradiation; Nitrogen; Organic Chemistry; Photocatalysis; Photosensitivity; Physical Chemistry; Physics; Physics and Astronomy; Solid State Physics; Spectroscopy/Spectrometry; Titanium dioxide; Paramagnetic Center; Electron Paramagnetic Resonance; Electron Paramagnetic Resonance Signal; Photocatalytic Activity; Electron Paramagnetic Resonance Spectrum
• ISSN: 0937-9347; 1613-7507
• DOI: 10.1007/s00723-009-0173-5

An electron paramagnetic resonance study of nitrogen-doped TiO 2 samples has been carried out in the dark and under illumination with light at different wavelengths. N · and NO · paramagnetic species were detected in the samples and their dynamics under illumination of TiO 2 was investigated. Photosensitivity of the nitrogen-doped TiO 2 and its photocatalytic activity under visible-light irradiation increases through the creation of additional levels in the band gap of TiO 2 caused by doping.