Core–shell magnetic Fe3O4/CNC@MOF composites with peroxidase-like activity for colorimetric detection of phenol

Rapid and accurate detection of phenolic wastewater from industries has created global concern. Herein, core–shell magnetic cellulose nanocrystal supported MOF (Fe3O4/CNC@ZIF-8) with robust peroxidase-like activity was synthesized tannic acid as modifier bridge. The peroxidase-mimic catalytic as-prepared Fe3O4/CNC@ZIF-8 further investigated using o-phenylenediamine (OPD) peroxidase substrates in the presence H2O2. Moreover, experimental conditions were optimized kinetic analysis results showed that had higher affinity towards both substrate OPD H2O2 than horseradish (HRP). Finally, a phenol colorimetric assay linear range 2–200 µM limit 0.316 constructed. mechanism by fluorescence test generated ·OH proved to act crucial role produce quinoid radicals. Additionally, material excellent stability recyclability ease separation. These suggest may be one promising candidates mimic for phenol.