In this work, sulfation-modified mesoporous Bi 2 O 3 /TiO 2 catalyst was prepared successfully by a facile route. The photocatalytic degradation efficiency on rhodamine B (RhB) under UVlight was investigated. The structure and morphology of the catalysts were characterized using thermogravimetry-differential thermal analysis (TG/DSC/DTA), N 2 adsorption-desorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (DRS) and Fourier transformed infrared spectroscopy (FT-IR). The photocatalytic degradation efficiency of Bi 2 O 3 /TiO 2 /SO 4 was 3 times higher than that of the pure mesoporous TiO 2 . About 93% of RhB was degraded after 120 min UV irradiation, suggesting the sulfation as an efficient modification route for decomposition of hazardous compounds in wastewaters.