Controlled oxygen doping in highly dispersed Ni-loaded g-C3N4 nanotubes for efficient photocatalytic H2O2 production

Hydrogen peroxide (H2O2) is both a key component in several industrial processes and promising liquid fuel. The production of H2O2 by solar photocatalysis suitable strategy to convert store energy into chemical energy. Here we report an oxygen-doped tubular g-C3N4 with uniformly dispersed nickel nanoparticles for efficient photocatalytic generation. hollow structure the provides large surface high density reactive sites visible light absorption during reaction. oxygen doping Ni loading enable fast separation photogenerated charge carriers selectivity toward two-electron process reduction reaction (ORR). optimized composition, Ni4%/O0.2tCN, displays rate 2464 μmol g−1·h−1, which eightfold higher than that bulk under irradiation (λ > 420 nm), achieves apparent quantum yield (AQY) 28.2% at 380 nm 14.9% nm.