Fig. 3: Characterization of pristine COF and COF-CDN membranes.
From: Covalent organic framework membrane with hourglass-shaped nanochannels for ultrafast desalination
a Surface SEM image and b cross-sectional SEM image of COF-CDN-12 membrane; c FT-IR spectra; d dynamic contact angle; e water contact angle in the air; the water contact angle of COF-CDN-12 membrane at different pH values, including f pH = 3; g pH = 7; h pH = 11; i zeta potential.
