NO treated TiO2 as an efficient visible light photocatalyst for NO removal

► We reported that nitrogen doped TiO2 could be achieved via thermal treatment of Degussa P25 TiO2 in NO atmosphere directly (P25-NO). ► In comparison with that of P25, the P25-NO exhibited significantly enhanced photocatalytic activities under visible light irradiation (λ > 420 nm) for gaseous NO removal. ► We proposed a possible mechanism for the enhanced visible light driven photocatalytic oxidation process over the interstitial N doping P25 samples.