Synergetic integration of catalase and Fe3O4 magnetic nanoparticles with metal organic framework for colorimetric detection of phenol

Toxic phenol pollutants pose a great threat to the environment, it is urgent to develop an efficient and recyclable method to monitor phenol. Herein, we reported the synthesis of catalase-Fe 3 O 4 @ZIF-8 (CAT-Fe 3 O 4 @ZIF-8) through a novel amino-acid-boosted one-pot embedding strategy that synergically integrated catalase and magnetic Fe 3 O 4 nanoparticles with ZIF-8. As expected, CAT-Fe 3 O 4 @ZIF-8 exhibited enhanced catalytic activity compared with Fe 3 O 4 @ZIF-8, CAT@ZIF-8 and catalase. Depending on the satisfactory performance of CAT-Fe 3 O 4 @ZIF-8, a colorimetric detection platform for phenol based on CAT-Fe 3 O 4 @ZIF-8 was constructed. The corresponding detection limit was as low as 0.7 μM, and a wide linear range of 5–100 μM was obtained. Besides, CAT-Fe 3 O 4 @ZIF-8-based colorimetric detection platform has been verified to possess high stability and recyclability . The proposed method was proven to have potential practical applications in the field of water treatment , which would advance efficient, recyclable monitoring of water quality.