Solvothermal synthesis and photocatalytic activity of S-doped TiO_2 and TiS_2 powders

摘要

The photocatalytic activity of S-doped TiO_2 powder depends on the Scontent. To synthesize S-doped TiO_2 powders with high S content, solvothermal processes were used in this work. The S-doped TiO_2 powder contains 2.0 M% sulfur and has an absorption edge of 460 nm (2.7 eV). The pure TiS_2 powder also synthesized by a solvothermal process has an absorption edge of 595 nm (2.08 eV) and broad absorption above 595 nm. The photocatalysis experiments indicate that the degradation of methyl orange is associated with the light adsorption edge. The photocatalytic activity is much larger for the pure TiS_2 powder than for partially Sdoped TiO_2 powder.