Degradation of phenol using a peroxidase mimetic catalyst through conjugating deuterohemin-peptide onto metal-organic framework with enhanced catalytic activity

Abstract Deuterohemin-β-Ala-His-Thr-Val-Glu-Lys (DhHP-6), a novel Deuterohemin-containing peptide mimetic of natural microperoxidase-11 (MP-11), was successfully immobilized onto NH2-UIO-66 (ZrMOF) by precipitation and cross-linking strategy to obtain a peroxidase mimetic, DhHP-6-c-ZrMOF. The synergy between components offers DhHP-6-c-ZrMOF excellent kinetics performance, peroxidase activity, pH stability, and phenol degradation capacity. Up to 98.0% of phenol could be degraded in 120 min when utilizing DhHP-6-c-ZrMOF as heterogeneous Fenton catalyst. Notably, DhHP-6-c-ZrMOF delivered outstanding recoverability with an 80.2% degradation ratio of phenol after four recycles. The efficient peroxidase mimetic can potentially be used as a promising catalyst for the high-efficiency degradation of phenol pollutants.