Preparation and characterization of sulfur-doped TiO_2/Ti photoelectrodes and their photoelectrocatalytic performance

摘要

Sulfur-doped TiO_2/Ti photoelectrodes were prepared by anodization and characterized by SEM, AFM, XRD, XPS, UV-vis and SPS. The results of investigation indicated that S~(4+) and S~(6+) were dispersed on the surface of TiO_2 nanoparticles. The doping with an appropriate amount of sulfur expanded the response range of TiO_2/Ti photoelectrodes to visible light, and enhanced the separation of photoinduced electrons from cavities. The photoelectrocatalytic performance test run with sulfur-doped TiO_2/Ti photoelectrodes under Xenon light indicated that Na_2SO_3 concentration of 750mg/L and voltage of 160 V were the optimal conditions for preparation of sulfur-doped TiO_2/Ti photoelectrodes.