Composite-controlled electrospinning of CuSn bimetallic nanoparticles/carbon nanofibers for electrochemical glucose sensor

Carbon nanofibers (CNFs), which possess excellent physical and chemical properties, have been widely used as supporting substrates of active metals (oxides). Due to the advantages of simple operation and high efficiency, electrospinning technology have become one of the most popular methods to produce CNFs and its composites. In this work, CuSn bimetallic nanoparticles/CNFs (CuSn/CNFs) were synthesized by electrospinning technique, and the effect of Sn incorporation on Cu/CNFs was investigated, indicating that the addition of appropriate amount of Sn could significantly enhance the electrocatalytic performance of Cu/CNFs for glucose oxidation. Under optimal conditions, the sensor exhibited excellent response towards the concentration of glucose with wide linear range (0.1–9,000 μM), low detection limit of 0.08 μM (S/N = 3), and fast response time (about 3 s). The proposed sensor shows good recovery in the detection of human serum, indicating that CuSn/CNFs hold great potential in electrochemical sensors.