Synthesis of carbon nanosheet from barley and its use as non-enzymatic glucose biosensor

摘要

In this work,carbon nanosheet(CNS) based electrode was designed for electrochemical biosensing of glucose.CNS has been obtained by the pyrolysis of barley at 600-750℃ in a muffle furnace:it was then purified and functionalized.The CNS has been characterized by scanning electron microscopy(SEM).X-ray diffraction(XRD) and Raman spectroscopic techniques.The electrochemical activity of CNS-based electrode was investigated by linear sweep vollammetry(LSV) and square wave voltammetry(SWV),for the oxidation of glucose in 0.001 M H_2SO_4(pH 6.0).The linear range of the sensor was found to be 10^(-4)-10^(-6)M(1-100 μM) within the response time of 4 s.Interestingly,its sensitivity reached as high as ~26.002±0.01 μA/μM cm^2.Electrochemical experiments revealed that the proposed electrode offered an excellent electrochemical activity towards the oxidation of glucose and could be applied for the construction of non-enzymatic glucose biosensors.