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Direct Z-scheme catalysts have become main “stars” of the photocatalytic field because of their excellent redox ability. Herein, a direct Z-scheme catalyst of TiO₂(P25)-C₃N₅ with enhanced structural defects was designed, which exhibited excellent activity and durability in visible-light-driven (λ > 400 nm) NO photooxidation (450 ppb) under the relative humidity (RH) of 15 %. After 6 continuous runs, the NO removal efficiency only shows 7.0 % of loss from 67.1 %–60.1 %, while that using TiO₂ and C₃N₅ declines 29.2 % and 5.1 %, respectively. In situ NO DRIFTS results confirm the main products of NO photooxidation in the system involving TiO₂-C₃N₅ to be NO₂ and NO₃⁻. Moreover, under the higher RH of 50 % and 80 %, TiO₂-C₃N₅ still exhibited the better activity and ndurability for NO photooxidation than P25 and C₃N₅. This work demonstrates a new direct Z-scheme catalyst with efficient NO photooxidation …