fig15

Figure 15. (A) The synthetic process of COFs on the electrode surface using EGA; (B) SEM image of the as-synthesized COF film; (C) The growth TpPa COF membrane on PAN via electrochemical polymerization; (D-K) SEM and (L-O) TEM images of TpPa membranes at different electropolymerization times; (P) Schematic representation for the electrochemical synthesis of COF membranes. (A and B) Adapted with permission^[139]. Copyright 2023, John Wiley and Sons. (C-O) Adapted with permission^[140]. Copyright 2023, John Wiley and Sons. (P) Adapted with permission^[141]. Copyright 2022, American Chemical Society. COFs: Covalent organic frameworks; EGA: electrogenerated acid; DPH: 1,2-diphenylhydrazine; TAPB: 1,3,5-tris(4-aminophenyl) benzene; PDA: terephthalaldehyde; SEM: scanning electron microscopy; Tp: 1,3,5-triformylphloroglucinol; Pa: p-phenylenediamine; PAN: polyacrylonitrile; TEM: transmission electron microscopy.