Cu-MOF for effectively organic pollutants degradation and E. coli inactivation via catalytic activation of peroxymonosulfate

Abstract

BackgroundThe Fenton-like reaction is a highly potential advanced oxidation process. The photo-Fenton-like reaction formed by the combination of photocatalytic advanced oxidation process, which combines their advantages, breaks the original Fenton-like reaction rate bottleneck. MethodsIn this study, an ultra-thin MOF (Cu-TCPP(BA)-MOF) with porphyrin as the ligand and copper as the metal node was synthesized via a simple one-pot method for the first time. Significant FindingsIt activates Peroxymonosulfate (PMS) under visible light to degrade 10 mg/L Rhodamine B which can be completely degraded within 40 min. The pseudo-first-order rate constant of RhB is 0.9011 min−1, being 5 folds larger than this for CuO as catalysts. ESR analysis shows that Cu-TCPP(BA)-MOF/PMS/vis system produces a large amount of non-radical 1O2. Also under visible light, with E. coli concentration of 107cfu/mL, it can be completely inactivated within 50 min. Dilution spreading plate method and Fluorescence spectroscopy confirmed the complete death of bacteria. In terms of mechanism, the ultra-thin MOF provides a large number of Cu2+ active sites. Under visible light, the cycle between Cu2+ and Cu+ is accelerated and the pathways that produce reactive oxygen species (ROS) is changed, thereby improving the performance of contaminant treatment and sterilization.