Titanium dioxide bonded activated carbon (TiO2/AC) was prepared via sol-gel method by a carrier of activated carbon. SEM, TG-DTA and XRD characterized TiO2/AC with regard to its components, structure and size. The photocatalytic activity of the prepared TiO2/AC was investigated by the degradation reaction of Rhodamine B radiated with ultraviolet light (UV lamp). The results show that the size of TiO2 grains is about 30 nm~60 nm in TiO2/AC composites. The crystalline phase of TiO2 mainly belongs to anatase. TiO2 grains, which are tightly connected with activated carbon carriers, are not planar uniting. The surface area of TiO2/AC is bigger than that of the activated carbon carrier. TiO2/AC may get almost 100% of the Rhodamine B removal after 200 minutes under UV irradiation while P25 reaches the same result in 5 h. TiO2/AC shows high photoactivity for Rhodamine B degradation; in addition, it can be easily separated from the solution.