ZIF-67 Derived Porous Carbon from Calcination and Acid Etching Process as an Enzyme Immobilization Platform for Glucose Sensing

In this work, a metal-organic frameworks-based porous carbon was explored for glucose oxidase immobilization and glucose sensing. ZIF-67 was chosen as the precursors for the calcination treatment. The formed Co nanoparticles induced the graphitization of the carbon during the carbonization, resulting in a good conductivity. The followed HCl treatment partly removed the formed Co nanoparticles to give a larger specific surface area of the porous carbon due to the generated space voids from the dissolved Co nanoparticles. The resulting MOFs-derived porous carbon show an improved loading performance toward glucose oxidase, and fast electron transfer was also demonstrated. This work proves the MOFs-derived porous carbon as a novel and outstanding platform for the enzymatic electrocatalysis for the sensors and energy conversion devices.