EPR study of chromium‐doped porous titanium dioxide

Abstract EPR study of chromium‐doped porous titanium dioxide samples has been carried out both in dark and under visible light illumination. Cr +3 spin centers located in subsurface layer and at the surface of the samples and O 2 – radicals were discovered in titanium dioxide and their dynamics under illumination of the samples was investigated. The number of Cr +3 spin centers correlates with content of chromium in the samples. Obtained data can be useful for development of chromium based TiO 2 photocatalysts (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)