Abstract
Nanozyme/natural enzyme hybrid plays a vital role in biosensing, therapy, and catalysis owing to the integrated advantages in the selectivity of natural enzymes and controllable catalytic activity of nanozymes. Herein, Fe-MIL-88B-NH2 [(Fe-metal-organic framework (MOF)] with remarkable peroxidase-like activity, ultrahigh stability, and high biocompatibility was utilized for immobilization of glucose oxidase (GOx) via an amidation coupling reaction. On the basis of the excellent selectivity and catalytic activity of Fe-MOF-GOx, a cascade catalysis was performed for the colorimetric detection of glucose. The integrated Fe-MOF-GOx not only exhibited higher stability and reusability than their mixtures including Fe-MOF and free GOx system but also possessed a wide linear range (1-500 μM), with a low detection limit of 0.487 μM for glucose detection.
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