“…Numerous two-dimensional materials, including MOFs, 4,23 COFs, 6 exfoliated WS 2 , 24 MoS 2 and g-C 3 N 4 , 25 and graphene, 26 demonstrate photocatalytic behaviour under specific circumstances. Graphene and reduced graphene oxide (rGO), the most acceptable two-dimensional nanosheet structures, show a huge capacity for different applications including transistors, optoelectronics, drug delivery, hydrogen production, CO 2 reduction, energy storage devices, sensors, lubrication, catalysis, etc.…”