Carbon-Doped Titanium Dioxide: Visible Light Photocatalysis and EPR Investigation | Zendy

Е. А. Константинова | Zendy; А. И. Кокорин | Zendy; S. Sakthivel | Zendy; Horst Kisch | Zendy; K. Lips | Zendy

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Carbon-Doped Titanium Dioxide: Visible Light Photocatalysis and EPR Investigation

Author(s) -

Е. А. Константинова,

А. И. Кокорин,

S. Sakthivel,

Horst Kisch,

K. Lips

Publication year - 2007

Publication title -

chimia international journal for chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.387

H-Index - 55

eISSN - 2673-2424

pISSN - 0009-4293

DOI - 10.2533/chimia.2007.810

Subject(s) - electron paramagnetic resonance , photocatalysis , photoexcitation , photochemistry , visible spectrum , titanium dioxide , irradiation , doping , carbon fibers , materials science , ultraviolet light , ultraviolet , carbon dioxide , analytical chemistry (journal) , chemistry , optoelectronics , nuclear magnetic resonance , catalysis , organic chemistry , excited state , atomic physics , physics , composite number , nuclear physics , metallurgy , composite material

X-band EPR studies of a series of undoped and carbon-doped titania powders reveal the presence of a carbon-centered radical species. The concentration of spins is five to six orders of magnitude smaller than the total carbon content. Photoexcitation of the carbon-doped samples increases the corresponding EPR signal intensities both under ultraviolet and visible light irradiation. After illumination, the original intensity is restored within a few hours. Samples with higher carbon radical concentration reveal higher photocatalytic activity in degradation of 4-chlorophenol under visible light irradiation.

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