▎ 摘　　要

A non-enzymatic electrochemical sensor based on decorated glassy carbon electrode is reported. The decoration is made out of gold nanoparticles incorporated graphene nanofibers. Among different electrolyte solutions employed, only H2SO4 could catalyze the oxidation of glucose in the voltage range of 0.0 - 0.8 V (versus Ag/AgCl) which is taken as sensing glucose. The cyclic voltammogram of the decorated electrode exhibits an anodic current peak at 0.45 V (versus Ag/AgCl) which is related to the direct oxidation of glucose by the decorating nanofibers. There was a linear sensing response to glucose in the concentration range of 0.5-9.0 mM. The sensitivity, detection limit and response time of this glucose sensor is measured to be 1.1437 mu A.mM(-1) cm(-2), 55 mu M and 1.7 s, respectively. Moreover, the redox reaction of the electrode was observed to be controlled by diffusion electrochemical process. It was also found that interfering substances like ascorbic acid, NaCl, ethanol and methanol had negligible effect on the performance of the decorated glassy carbon sensor.