Figure 4.

a,b) Production of •OH through photo‐Fenton reaction catalyzed by RuFc (50 × 10⁻⁶ m) at pH 6.5 (a) and pH 7.4 (b). Irradiation conditions: 450 nm, 20 mW cm⁻², 3 min. c,d) Determination of the ¹O₂ by RuFc using ABDA (100 × 10⁻⁶ m) as the probe under visible light irradiation in the absence or presence of H₂O₂ (100 × 10⁻⁶ m) at pH 6.5 (c) and pH 7.4 (d). The solutions were irradiated with a 450 nm laser (20 W cm⁻²) for different time periods.