Shape-controlled Synthesis of Cu2O Microstructures at Glassy Carbon Electrode by Electrochemical Method for Non-enzymatic Glucose Sensor

In this work, the electrochemical deposition of Cu2O microcrystals was investigated at glassy carbon (GC) electrode. Besides octahedral and microspherical Cu2O, a novel superoctahedral structure was fabricated via controlling the reduction potential, and the transforming process from octahedral to microspherical structure was also examined. The possible growth mechanism was discussed here, and the growing rates played an important part on the morphology. The non-enzymatic glucose detection based on the as-prepared Cu2O microspheres modified GC (Cu2O-GC) electrode was also presented, which exhibited excellent operation stability and good linear dependence on glucose concentration from 10 mu M to 5 mM and the calibration equation was I (mu A) = 4.56 + 5.01 x 10(-3) C (mu M) with a correlation coefficient of 0.9995.