The Role of Free‐Radical Pathway in Catalytic Dye Degradation by Hydrogen Peroxide on the Zr‐Based UiO‐66‐NH2 MOF

Abstract The role of free‐radical species in catalytic oxidative decomposition of thioether utilizing UiO‐66‐NH 2 Zr‐MOF/H 2 O 2 system is highlighted. In contrast to other examples of Zr‐MOF‐mediated oxidation of organic sulfur by H 2 O 2 , the amino‐functionalized UiO‐66‐NH 2 clearly demonstrates nearly quantitative decomposition and excellent recyclability for 10 consecutive cycles without any detectable loss of activity. Several characterization techniques revealed the maintained structural stability of the UiO‐66‐NH 2 MOF even after prolonged utilization. The data presented here clearly demonstrates involvement of free‐radical species as inferred from EPR spectroscopy, which proposes a more comprehensive mechanism involving catalytic activation of H 2 O 2 on Zr‐oxoclusters aided by the amine‐centered holes.