Abstract
Fe-MOFs are expected to be the candidates for heterogeneous Fenton catalysts due to their porous channel and high specific surface area feature. However because of their small size they are difficult to recycle, and the low Fe(II) concentration make them low efficiency for H2O2 activation. Herein, we report millimeter-scale polymer anchored porous MIL-53(Fe) composite balls with highly improved Fenton-like performance and easy recycling for the elimination of carbamazepine. It is prepared via MIL-polyethersulfone dope and solvent/water exchange method with organic ligand substitution strategy that affording SO and CO mixed-coordination. The degradation rate constant for MIL-53(Fe)@PES is 4 times that of pure MIL-53(Fe), while the degradation rate constant of photo Fenton is 79 times of dark one. The composite balls can be recovered by simple precipitation process and the removal efficiency of carbamazepine still reach 80% after 5 cycles of regeneration. The mechanism of photo-Fenton degradation of carbamazepine were proposed.
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