Figure 6
From: Synthesis of multi-shelled ZnO hollow microspheres and their improved photocatalytic activity
Photographs, concentrations, and photocatalytic degradation of MO. (a) Photographs of MO irradiated by UV light for different periods of time. (b) Concentration of MO in the solution with the triple-shelled ZnO hollow spheres. (c) Concentration of MO in the solution with different photocatalysts versus the 30-min exposure time to UV irradiation. (d) Cycling runs in the photocatalytic degradation of MO in the presence of the triple-shelled ZnO hollow spheres.