Highly enhanced electrochemical responses of rutin by nanostructured Fe2O3/RGO composites

Abstract

Fe2O3/reduced graphene oxide (RGO) nanocomposites were prepared by a hydrothermal reduction using Fe(OH)3 and graphene oxide (GO) precursors, which were assembled electrostatically by mixing a negatively charged GO aqueous suspension with a positively charged Fe(OH)3 solution at room temperature. The resulting composites were characterized using XRD, SEM, FTIR, and TGA, and then were used to modify the glassy carbon electrode (GCE). The electrochemical behavior of rutin on different types of electrode was compared, and the Fe2O3/RGO composite enhanced electrochemical catalysis effect on rutin, and suitable for rutin detection with high sensitivity and short response time. After 90 s, under open circuit potential, the linear range was increased from 1.5 × 10−8 to 1.8 × 10−5 M, and the detection limit was reduced to 9.8 × 10−9 M. This method of analysis has high recovery ratio of rutin up to 99.5 %.