Key Words:Nitrogen-doped graphene; Rutin; Carbon ionic liquid electrode; Electrochemistry

Abstract:In this paper nitrogen-doped graphene (NC) was synthesized and applied to modify an ionic liquid 1-hexylpyridinium hexafluorophosphate based carbon ionic liquid electrode (CILE). The fabricated NG/CILE exhibited excellent electrochemical performances. Electrochemical behaviors of rutin on NG/CILE were carefully investigated with a pair of well-defined redox peaks appeared, which was attributed to the presence of NC with electrocatalytic activity. Electrochemical parameters of rutin on NG/CILE were calculated with the values of charge transfer coefficient (alpha), electron transfer number (n) and electrode reaction standard rate constant (k(s)) as 0.57, 1.76 and 1.24 s(-1), respectively. Under the optimal conditions rutin could be detected in the concentration range from 7.0 x 10(-10) to 1.0 x 10(-5) mol/L with the detection limit as 0.23 nmol/L (3 sigma) by differential pulse voltammetry. The proposed method was further applied to the determination of rutin tablet samples with satisfactory results. (C) 2014 Elsevier B.V. All rights reserved.

Volume:199

Issue:199(卷）

Translation or Not:no