Electrochemical behavior of rutin on a multi-walled carbon nanotube and ionic liquid composite film modified electrode.
In this paper, the electrochemical behaviors of rutin at the MWNTs-IL-Gel/glassy carbon electrode (GCE) were investigated. Good electrocatalysis behavior towards the oxidation of rutin with enhancement of the redox peak current and decrease of the peak-to-peak separation was demonstrated. The electrochemical parameters of rutin were calculated giving values of the charge-transfer coefficient (alpha) and the electrode reaction standard rate constant (k(s)) as 0.47 and 0.2s(-1), respectively. In addition, the MWNTs-IL-Gel/GCE was characterized by different methods including electrochemical impedance spectroscopy (EIS), scanning electron microscope (SEM), clay film thickness, and UV-vis spectra. The oxidation peak currents of rutin in such modified electrode increased linearly with the concentration of rutin in the range from 7.2 x 10(-8) to 6.0 x 10(-6) mol L(-1) with a detection limit of 2.0 x 10(-8) mol L(-1). These results suggest that the proposed electrode can be used for sensitive, simple and rapid determination of rutin.
Liu
Xiuhui
X
College of Chemistry and Chemical Engineering, Northwest Normal University, No 967 Anning Estern Road, Lanzhou 730070, Gansu, China.
Li
Li
L
Zhao
Xueping
X
Lu
Xiaoquan
X
D058266:Dielectric Spectroscopy; D055664:Electrochemical Techniques / Q000295:instrumentation* / Q000379:methods; D004566:Electrodes; D006863:Hydrogen-Ion Concentration; D052578:Ionic Liquids / Q000737:chemistry*; D007700:Kinetics; D008855:Microscopy, Electron, Scanning; D015394:Molecular Structure; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D015203:Reproducibility of Results; D012431:Rutin / Q000032:analysis / Q000737:chemistry*; D013053:Spectrophotometry
D052578:Ionic Liquids; D037742:Nanotubes, Carbon; D012431:Rutin