Effect of a long-term exposure of anatase TiO2 powder doped with surface-located Sb3+ ions to UV radiation on its photocatalytic activity

Ultraviolet photocatalytic experiments on the kinetics of decolorization of methyl orange and the ¹²¹Sb Mössbauer characterization of the title catalyst were performed. The stereochemically active electronic lone pair of Sb³⁺ was found to completely deactivate the neighboring oxygen vacancy as a recombination center towards the photogenerated electrons and holes.