Ultrahigh Adsorption Capacity Zirconium-Magnesium Composite Oxide Nanoclusters Remove Malachite Green from Aqueous Media

Figure 4

FESEM images of (a, b) pure MgO, (c) pure ZrO₂, and (d) 2.00-ZM.

(a)

(b)

(c)

(d)