fig3

Figure 3. (A) Schematic illustration of liquid-exfoliation process from bulk g-C₃N₄ to ultrathin nanosheets. (Reproduced with permission^[59]. Copyright 2013, American Chemical Society). (B) Schematic illustration of solvothermal exfoliation process from mesoporous g-C₃N₄ bulk to nanomesh. (Reproduced with permission^[61]. Copyright 2016, American Chemical Society). (C) Schematic illustration for the preparation of K/S@CN_-x photocatalysts. (Reproduced with permission^[65]. Copyright 2023, American Chemical Society). (D) An illustration of the HCNS and metal/HCNS composite syntheses. (Reproduced with permission^[37]. Copyright 2012, Springer Nature).