Effect of different copper sources on the morphology of cuprous oxide and its application as a non-enzymatic glucose sensor

Herein, Cu2O with different morphology were successfully synthesized by simply adjusting the copper sources via a seed-medium process. Cu2O cubes with uniform size and stacked octahedrons (stacked by the self-assembly of cubic Cu2O) were obtained. The growth mechanism of cubes and stacked octahedrons were studied and applied to non-enzymatic glucose detection. The obtained electrode exhibited excellent capability toward the glucose oxidation. The S-Cu2O modified electrode showed the highest sensitivity of 2864 mu A m center dot M-1 cm(-2), the NCu2O modified electrode exhibited the widest linear range of 0.05-7.65 mM and the lowest LOD of 0.5 mu M. Meanwhile all the samples showed fast response time. The S-Cu2O and N-Cu2O modified electrode also exhibited good selectivity and stability. Thanks to these obvious advantages, the modified electrodes have a promising prospect in practical applications.