Ultrasonic-Assisted Synthesis, Characterization, and Optical Properties of Sb Doped ZnO and Their Photocatalytic Activities

Figure 3

SEM images of (a) pure ZnO, (b) 1% Sb doped ZnO, (c) 2% Sb doped ZnO, and (d) 3% Sb doped ZnO samples at high magnification.

(a)

(b)

(c)

(d)