Comparative Study of Photocatalytic Activities of Sn- or F-doped and Sn-F Co-doped TiO2 Nanomaterials

Sn-doped TiO2, F-doped TiO2 and Sn-F co-doped TiO2 materials (5.0 at.% Sn, 5.0 at.% F) were synthesized by sol-gel method and calcined at different temperatures. All of obtained materials are nanoscale, particles size is 12–40 nm, which depends on composition and calcination temperature. High photocatalytic activity is characteristic for all materials both under UV and visible light irradiation. Sn-F co-doped TiO2 nanomaterials are characterized by higher photocatalytic activity, than Sn- or F-doped TiO2.