Electrochemical Glucose Sensor based on Microporous Carbon/CuO@Carbon/AuNPs Integrated Electrode

Abstract

A novel nonenzymatic glucose sensor based on CuO@Carbon nanostructures capped with gold nanoparticles (AuNPs) arrayed on three‐dimensional porous carbon derived from kenaf stem (3D‐KSC) was proposed. Here, the massive 3D‐KSC with honeycomb‐like structure was used as supporting matrix to load CuO@Carbon nanostructures. A small amount of AuNPs were coated on CuO@Carbon nanostructures, which were arrayed on 3D‐KSC uniformly. The AuNPs improved the electrical conductivity and catalytic activity of CuO@Carbon nanostructures greatly. Thus, the 3D‐KSC/CuO@Carbon/AuNPs integrated electrode based nonenzymatic glucose sensor showed good performance with the linear range of 3.71 μM–8.5 mM, the detection limit of 1.22 μM and the sensitivity of 935 μA cm−2 mM−1. The satisfied performance made sure it can be used to detect glucose in real blood samples.