Fe3O4@C magnetite nanocomposite: an artificial peroxidase nanozyme for the development of a colorimetric glucose biosensor

The synthesized Fe 3 O 4 @C nanozyme with strong peroxidase-like catalytic activity were prepared. It was used to replace the HRP for fabrication of a colorimetric chemical H 2 O 2 sensor and glucose biosensor with a LoD 20 μM and 40 μM, respectively.