A Non-Enzymatic Glucose Sensor Based on Ni/MnO2 Nanocomposite Modified Glassy Carbon Electrode

A novel flower like 3D nickel/manganese dioxide (Ni/MnO2) nanocomposite was synthesized by a kind of simple electrochemical method and the formation mechanism of flower like structure was also researched. In addition, morphology and composition of the nanocomposite were characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Then the Ni/MnO2 nanocomposites were applied to fabricate electrochemical non-enzymatic glucose sensor. The electrochemical investigation for the sensor indicated that it possessed an excellent electrocatalytic property for glucose, and could applied to the quantification of glucose with a linear range from 2.5x10(-7) to 3.5x10(-3)M, a sensitivity of 1.04mAmM(-1)cm(-2), and a detection limit of 1x10(-7)M (S/N=3). The proposed sensor also presented attractive features such as interference-free, and long-term stability. The present study provided a general platform for the one-step synthesis of nanomaterials with novel structure and can be extended to other optical, electronic and magnetic nanocompounds.