Manifestation of the photocatalytic activity of anatase powders in M?ssbauer spectra of ~(121)Sb probe nuclei

摘要

The irradiation with UV light of anatase powders containing additives of Sb~(3+) on the surfaces of crystallites, submerged in water, changes the parameters of ~(121)Sb M?ssbauer spectrum indicating the transition of antimony to the pentavalent state. It is shown that this transformation is due to the emergence of holes in the valence band of TiO_2.