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

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 mu M-8.5 mM, the detection limit of 1.22 mu M and the sensitivity of 935 mu A cm(-2) mM(-1). The satisfied performance made sure it can be used to detect glucose in real blood samples.