Fig. 13. Images of the antibacterial assays of SBA, SBA/CuO, SBA/ZnO and SBA/CuZnO at different concentrations inhibit E. coli (a–d) and S. aureus (e–h) (the scale in the picture is 20 μm). Their antibacterial reduction rate with E. coli (i) and S. aureus (j).