Zirconium 1,4-dicarboxybenzene MOF (UiO-66), a metal-organic framework with high surface area and stability, has become one of the most popular MOFs, leading to its potential application as a support for nanoparticles. Furthermore, UiO-66 is effective in capturing heavy metals from aqueous solutions, such as As(v) and U(vi). The particle size of MOFs (UiO-66) was 0.20–0.36 μm, and the particles had clearly visible facets. The Zr–O bonds between the cluster and carboxylate ligands were known to increase the stability of Zr-based MOFs. The strong Zr–O bonds and the stable Zr6-cluster core also contributed to the special stability of UiO-66[1].
