Abstract
Photocatalytic activity of vanadium modified Hombikat UV 100 TiO2 was investigated in of the Rhodamine B photodegradation in a wide range of vanadium content. Structure and properties of VO2+ paramagnetic centers (PCs) formed on TiO2 surface were studied by X-band electron paramagnetic resonance (EPR). Two types of PCs, aggregated and isolated ones, were revealed and described quantitatively. EPR results in comparison with photocatalytic data allowed conclude that the most probable catalytically active centers are the isolated vanadium centers on the V-doped TiO2 surface.
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