Fig. 2: Morphology and characterization of COFs.

TEM images of a CoPc-O-COF and d CoPc-S-COF. HR-TEM images of b CoPc-O-COF and e CoPc-S-COF. The EDX mapping analysis of c CoPc-O-COF and f CoPc-S-COF. High-resolution XPS spectra of g Co 2p for CoPc-O-COF and CoPc-S-COF, h O 1s for CoPc-O-COF and i S 2p for CoPc-S-COF.