Fig. 2. (a) The scheme of selectively photocatalytic oxidation of ethylbenzene into acetophenone. (b) Photocatalytic activities of blank CBB, CsPCN, x% CsPCN–CBB (x = 5, 10, 15). (c) Recycle tests over CsPCN–CBB composite. (d) Rader plot of photocatalytic aerobic oxidation reactions with different reactants. (e) Kinetic isotope effect (KIE) experiments of CsPCN–CBB composite. (f) Performance comparison with other photocatalytic or thermocatalytic systems.