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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].

[1] Liu, Tingyi et al. “Highly efficient and rapid removal of arsenic(iii) from aqueous solutions by nanoscale zero-valent iron supported on a zirconium 1,4-dicarboxybenzene metal–organic framework (UiO-66 MOF).” RSC Advances 67 (2019): 39475–39487.