Non-OH reactive oxygen species (ROS) were found to account for 75% in OA mineralization, attributed to enhanced DO adsorption towards TiO2 surface by Ag+ doping. However, Cu2+ doping could facilitate the oxidation by hvb + plus OHads, which took as dominant a part as 53%. Ag+-Cu2+ co-doping integrated these two positive sides and more inclined to the role of Ag+.