Enhanced Visible Light Activity and Stability of TiO2 Nanopowder by co-doped with Mo and N

A visible light responsive N, Mo co-doped TiO2, were prepared by sol-gel method. X-ray diffraction, TEM, N-2 adsorption, UV-vis spectroscopy, photoluminescence, and X-ray photoelectron spectroscopy were used to characterize the prepared TiO2 samples. Doping restrained the phase transformation from anatase to rutile and reduced the particle sizes. The band gap was much narrowed after N, Mo co-doping. The photocatalytic activities were tested in the degradation of an aqueous solution of a reactive dyestuff, methylene blue, under visible light. The photocatalytic activities of doped TiO2 were much higher than that of neat TiO2. The photocatalytic stability of N, Mo co-doped TiO2, was much better than that of N doped TiO2.