Abstract
The removal of toxic organic compounds (TOCs) using highly porous solids such as metal-organic frameworks (MOFs) has gained significant attention over the past decade. In this study, it has been demonstrated that the efficiency of PCN-250 as a heterogeneous catalyst porous coordination network (PCN) for both Fenton and photo-Fenton reactions can be improved by the isomorphic substitution of Mn and Co for Fe, while it can be inhibited by the substitution of Ni for Fe. Furthermore, the Mn-substituted sample named PCN-250(Fe2Mn) decomposed 100% of methylene blue (MB) in solution in 300 min and displayed good recyclability over three cycles. This work establishes that the highly porous, commercially available, and robust family of MOFs named PCN-250 has the potential to be used as catalysts for Fenton and photo-Fenton reactions as well as broader advanced oxidation processes (AOP) for water purification applications. Overall, this work successfully demonstrates not only the ability to perform isomorphic substitution of various metals within MOFs but also the effect of the substitution on the resulting catalytic performance.
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