Use of co-spray pyrolysis for synthesizing nitrogen-doped TiO sub(2) films

Nitrogen-doped nanocrystalline TiO sub(2) is well known as the most promising photocatalyst. Despite many years after discovery, seeking of efficient method to prepare TiO sub(2) doped with nitrogen still attracts a lot of attention. In this paper, we present the result of using co-spray pyrolysis to synthesize nitrogen-doped TiO sub(2) films from TiCl sub(4) and NH sub(4)NO sub(3). The grown films were subjected to XRD, SEM, photocatalysis, absorption spectra and visible-light photovoltaic investigations. All the deposited films were of nanosized polycrystal, high crystallinity, pure anatase and porosity. Specific characteristics involved nitrogen doping such as enhanced photocatalytic activity, bandgap narrowing, visible light responsibility and typical correlation of the photoactivity with nitrogen concentration were all exhibited. Obtained results proved that high photoactive nitrogen-doped TiO sub(2) films can be synthesized by co-spray pyrolysis.