Fig. 3: Optic and electronic properties and photocatalytic performances of Tp-Py-COF under visible light irradiation.

UV−vis DRS and Tauc plot (inset) (a), Mott−Schottky curves (b), wavelength-dependent hydrogen production activities from water (c), and hydrogen production proceeded for 20 h with intermittent evacuation every 5 h (d). Reaction condition: 2 mg catalyst, 100 mL water or seawater containing 0.1 M ascorbic acid, λ ≥ 420 nm, and i = 20 A). Source data are provided as a Source Data file.