Photocatalytic Property of Nitrogen and Nickel Codoped Titanium Oxides

Abstract

Nitrogen or nitrogen and nickel codoped TiO(2)s are prepared by a hydrothermal method. The doped TiO(2)s are applied to the photodecomposition of methylene blue (MB) under visible-light irradiation. The chemical and physical properties of catalysts are characterized by X-ray diffraction, transmission electron microscope, energy dispersive spectroscopy mapping, zeta potential, and Brunauer-Emmett-Teller. We found that nickel and nitrogen atoms are well dispersed in TiO2. While the adsorption of MB on the TiO2 surface are improved by the nitrogen doping, the photodecomposition capability of MB is barely affected by the nitrogen doping level. Particularly, the photodegradation power of the nickel and nitrogen codoped TiO2 is better than that of commercial TiO2 (Degussa P25).