Abstract:Rare earth element La3+ doped Bi2WO6 (La/Bi2WO6) was synthesized by hydrothermal method. Reactive brilliant red X-3B was used to as the objective pollutant to investigate the photocatalytic activity of La/Bi2WO6. The physicochemical properties of prepared materials were characterized by XRD, FESEM, UV-vis DRS and N2adsorption-desorption. As a result, La/Bi2WO6(5%) had the optimum photocatalytic activity to X-3B, which had good crystalinity, uniform particles, strong visible litght-responsible property and the higher SBET value with above 30% than pure Bi2WO6. Besides, the factors of the dosage of catalyst, initial concentration of X-3B, and pH values of the reaction solution all played important role on X-3B removal by La/Bi2WO6.