Nitrogen and Lanthanum Co-Doped TiO2 with Enhanced Photocatalytic Activity
Nitrogen and lanthanum co-doped nanocsystalline titania photocatalysts were prepared by a homogeneous precipitation-hydrothermal process. The photocatalytic activity of the prepared samples on photodegradation of rhodamine B in visible light irradiation was studied. The nitrogen and lanthanum co-doping could greatly improve the photocatalytic activity of titania in visible light irradiation, probablely due to a synergistic effect of co-doping. The nitrogen doping could narrow the band gap of titania and enhance the utilization efficiency of visible light, while the lanthanum doping could accelerate the separation of photo-generated electrons and holes. Furthermore, the lanthanum doping could increase the adsorption of organic pollutants on the surface of photocatalyst.
Y. Cong et al., "Nitrogen and Lanthanum Co-Doped TiO2 with Enhanced Photocatalytic Activity", Advanced Materials Research, Vols. 179-180, pp. 192-196, 2011