Fig. 8
a Re-usability of ultrasound assisted photocatalytic degradation of isoproturon b. Re-usability of ultrasound assisted photocatalyst for photocatalytic degradation of triasulfuron (Conditions: pH 7 for isoproturon and pH 7 and pH 6 using Cu/ZnO and Ni/ZnO for triasulfuron, 0.1 g of photocatalysts (Cu/ZnO and Ni/ZnO), irradiation time (30 min), temperature 25 °C and 3 mM of H2O2 using Cu/ZnO and 4 mM of H2O2 using Ni/ZnO for isoproturon and 5 mM of H2O2 using Cu/ZnO and Ni/ZnO for triasulfuron in the presence of sonication and visible light)