fig3

Figure 3. (A) Schematic diagram illustrating carbonization processes of PAN substrates and the subsequent interfacial polymerization with various monomers to fabricate 2D COF membranes. Reproduced with permission. Copyright 2023, Springer Nature^[56]. (B) Schematic diagram illustrating two-step polymerization processes for fabrication of high-quality 2D COFs. Reproduced with permission. Copyright 2018, The American Association for the Advancement of Science^[61].