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(a) Nyquist plots of G-CN and s-BCN obtained by applying a sine wave with amplitude of 5.0 mV over the frequency range from 10 kHz to 0.1 Hz. Inset: Periodic on/off photocurrent response of G-CN and s-BCN electrodes in 0.1m Na2SO4 with 0 V bias versus Ag/AgCl. (b) Potential dependence of the rate constant kt and kr for s-BCN and G-CN samples. Illumination: 365 nm UV light. Adapted with permission from ref (104). Copyright 2017 Wiley-VCH.
