LAUSR

ABSTRACT N-doped TiO2 nanoparticles supported TiO2 film was fabricated on the FTO substrate by a dip-coating method. The influence of N-doped TiO2 nanoparticles on the film composition, microstructure, light absorption capability and electron hole migration property were characterized by XRD, XPS, TEM, SEM, AFM, Raman spectroscopy, UV–Vis spectroscopy and PL spectroscopy. The corresponding photocatalytic properties in photoelectrochemical oxygen production and photocathodic protection have been investigated. The results indicated that the N-doping led to the intermediate energy level formation above the top of O-2p valence band, which extended the photo response of TiO2 to the visible light range and promoted the electron-hole separation. Furthermore, the addition of N-doped TiO2 particles to TiO2 sol essentially improved the continuity of TiO2 film, resulting in effective inhibition of the corrosive ions migration to the stainless steel substrate.