Ultrasound-Assisted Rapid ZIF-8 Synthesis, Porous ZnO Preparation by Heating ZIF-8, and Their Photocatalytic Activity

Figure 2

SEM images of ZIF-8 samples: (a) Z-stir-(8 h); (b) Z-ultrasound-(0.5 h); (c) Z-ultrasound-(1 h); (d) Z-ultrasound-(2 h).

(a)

(b)

(c)

(d)