Fig. 4: Photocatalytic H₂O₂ production performance of COFs.

a UV-vis DRS spectra of the COFs. b Band gaps of the COFs. c Photocatalytic H₂O₂ yield of the COFs. Reaction condition: 300 W Xenon lamp λ > 420 nm, 10% EtOH solution. d H₂O₂ yields of DT₂TA-TAPB and DT₃TA-TAPB under different atmospheres. e Photocatalytic H₂O₂ production rates of DT₂TA-TAPB and DT₃TA-TAPB in pure water, 10% EtOH, and seawater. f Wavelength-dependent H₂O₂ production rates of DT₂TA-TAPB. g Performance comparison of DT₂TA-TAPB with other recently reported COF-based photocatalysts in 10% EtOH or pure water. h Long-term photocatalytic H₂O₂ production by DT₂TA-TAPB (Reaction conditions: 10 mg catalyst in 40 mL pure water, under air atmosphere, irradiated by a 300 W Xenon lamp (light intensity: 100 mW cm⁻²)). Error bars indicate the standard deviations of four replicate measurements.