Photocatalytic Property of TiO2 Catalyst Doped with Tb

Abstract:

The Tb3+-TiO2 photocatalyst with different amounts of doped Tb3+ and under different calcination temperatures were synthesized by sol–gel method, and characterized by XRD and FT-IR and photocatalytic activity.Malachite green experiment was chosen to evaluate photocatalyst’s activity. The results showed that the obtained powder is anatase TiO2, and with the Tb3+ doped, which indicating that Tb3+ doped rare earth can refine the grain. The photocatalytic material experiments of malachite green degraded showed that, calcined at 400 ℃, Tb3+-TiO2 molar ratio of 2.5% catalyst, irradiated without lighting 3h, the degradation rate could be 81.1%. Key words：Sol-gel method; nano TiO2;Tb3+ doped TiO2; photocatalytic activity