High-Performance Non-Enzymatic Glucose Sensor Based on Boron-Doped Copper Oxide Nanbundles

Abstract

In this paper, for the first time, boron-doped copper oxide (B-CuO) was explored as an excellent electrocatalyst for glucose oxidation, which was synthesized by a simple method. The nanomaterials were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy (Raman). The results show that B-CuO presents a spindle structure with rich pores, which favors exposure of accessible active sites. Moreover, the doping of B significantly accelerates the electron transfer rate. Owing to these unique features, the enzymeless sensor based on B-CuO exhibited excellent performance for glucose analysis with a high sensitivity (1546.13 μ A·mM −1 ·cm −2 ), a wide detection range (0.2 μ M−1.1 mM), and a low detection limit (0.16 μ M). This study demonstrated B-CuO as a new electrocatalyst for electrochemical sensing of glucose.