Author:
Konstantinova Elizaveta A.,Kokorin Alexander I.,Sakthivel Shanmugasundaram,Kisch Horst,Lips Klaus
Abstract
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.
Subject
General Medicine,General Chemistry
Cited by
51 articles.
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