Fig. 6From: Facile Synthesis and High Photocatalytic Degradation Performance of ZnO-SnO2 Hollow SpheresUV–vis spectra changes of RhB on the ZnO hollow spheres (a) and ZnO-SnO2 hollow spheres (b). Photocatalytic degradation efficiencies of RhB with ZnO hollow spheres and ZnO-SnO2 hollow spheres (c). Kinetics curves of RhB (d)Back to article page