Figure 7

Recycling tests of 1% Bi₂WO₆–BiOCl for (a) OTC (C₀ = 20 ppm), (b) phenol (C₀ = 20 ppm) photocatalytic degradation under simulated sunlight irradiation, (c) XRD patterns and (d) SEM images of the fresh and used (20 h) 1% Bi₂WO₆–BiOCl for phenol degradation.