Photocatalytic Degradation Performance of Fluorine and Nitrogen Co‐doped TiO ₂ /AC Composites over Printing and Dyeing Wastewater under Visible‐Light Irradiation

In this study, F−N-TiO2/AC photocatalysts were prepared by loading titanium dioxide (TiO2) onto activated carbon (AC) using an impregnation-hydrothermal method and co-doping with fluorine and nitrogen. The results showed that the catalytic efficiency and reuse performance of F−N-TiO2/AC were significantly improved due to the co-doping of TiO2 by fluorine and nitrogen and the strong adsorption property of AC. The photocatalytic degradation of methyl orange by F−N-TiO2/AC was fitted by a first-order kinetic model and the degradation rate is 0.09616 min−1.