Fig. 16.

a Illustration of the formation process of g-C₃N₄–rGO. Reproduced with permission from Ref. [110]. b Schematic of the synthesis process of the Zn₂GeO₄/g-C₃N₄ hybrids. Reproduced with permission from Ref. [111]. c Schematic illustration of the procedure for preparing S/GCN hybrid sponge. Reproduced with permission from Ref. [113]. Copyright permissions from Royal Society of Chemistry and Wiley–VCH. (Color figure online)