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

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 NH 2 -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. Unlabelled Image • Precipitation and cross-linking strategy for construction of peroxidase mimetic (DhHP-6- c -ZrMOF). • Characterization of the immobilization of DhHP-6 onto ZrMOF. • DhHP-6- c -ZrMOF delivered enhanced kinetics performance, peroxidase activity, pH stability. • Synergistic mechanism offers the material excellent phenol degradation capacity and recoverability. [ABSTRACT FROM AUTHOR]