Fig. 7: Reactive species analysis results via quenching experiments and ESR tests.
a The impact of MeOH on SDZ photodegradation in the MBZ/PMS/vis system. b The impact of TBA on SDZ photodegradation in the MBZ/PMS/vis system. c The impact of FFA on SDZ photodegradation in the MBZ/PMS/vis system. d The impact of p-BQ on SDZ photodegradation in the MBZ/PMS/vis system. e The impact of EDTA-2Na on SDZ photodegradation in the MBZ/PMS/vis system. In (a–e), the gray symbols represent the control group. In (a–c), the pink, green, and blue symbols refer to quencher concentrations of 20 mM, 50 mM, and 100 mM, respectively. In (d), the pink, green, and blue symbols refer to p-BQ concentrations of 0.5 mM, 1 mM, and 2 mM, respectively. In (e), the pink, green, and blue symbols refer to EDTA-2Na concentrations of 5 mM, 10 mM, and 20 mM, respectively. f The ESR spectra of DMPO-·OH (black club), SO4·− (black circle), TEMP-1O2 (spade), and DMPO-O2·− (black square) in the MBZ/PMS/vis system. (Conditions: 25 °C, [SDZ] = 20 mg/L, [Photocatalyst] = 0.2 g/L, [PMS] = 0.31 mM, and initial pH = 6.8, [P visible light] = 90 W).
