Preparation,characterization and photocatalytic activity of N doped TiO_2 by nodic oxidation combination with chemical reaction release N_2

N doping Ti O2 was prepared by one step method of anodic oxidation combined with reaction of urea with sodium nitrite under acidic conditions to release nitrogen,anatase N-Ti O2 were obtained upon calcination at temperature of 45℃ over four hours. The surface morphology,structure and elements composition was characterized by scanning electron microscope( SEM),energy dispersive spectrometry( EDS),X-ray diffraction( XRD) and X-ray photoelectron spectroscopy( XPS). Photocatalytic activity was characterized by degradation of methyl orange. The result showed that the diameters of the as-prepeared Ti O2 and N-Ti O2 were about 120 and 80 nm. XRD crystal structure analysis showed there were no changes of anatase phase in the process of N-doped Ti O2,but 101 crystal plane peak was significantly enhanced. XPS detected the N atom percentage content of 5. 60%. The photocatalytic degradation of methyl orange indicated N-doped Ti O2 has higher photocatalytic activity than undoped.