Ni(II)-quercetin complex modified multiwall carbon nanotube ionic liquid paste electrode and its electrocatalytic activity toward the oxidation of glucose |
| |
Authors: | Li Zheng Jiao-qiang Zhang |
| |
Affiliation: | a Institute of Analytical Science, Northwest University, Xi’an, 710069, PR China b College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an, 710065, PR China c Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi’an, 710072, PR China |
| |
Abstract: | A modified electrode Ni(II)-Qu-MWCNT-IL-PE has been fabricated by electrodepositing Ni(II)-quercetin Ni(II)-Qu] complex on the surface of multi-wall carbon nanotube ionic liquid paste electrode (MWCNT-IL-PE) in alkaline solution. The Ni(II)-Qu-MWCNT-IL-PE exhibits the characteristic of improved reversibility and enhanced current responses of the Ni(III)/Ni(II) couple compared with Ni(II)-Qu-MWCNT-PE. It also shows good electrocatalytic activity toward the oxidation of glucose. Kinetic parameters such as the electron transfer coefficient α, rate constant ks of the electrode reaction and the catalytic rate constant kcat of the catalytic reaction are determined. Moreover, the catalytic current presents linear dependence on the concentration of glucose from 5.0 μM to 2.8 mM, with a detection limit of 1.0 μM by amperometry. The modified electrode for glucose determination is of the property of simple preparation, good stability, fast response and high sensitivity. |
| |
Keywords: | Glucose Nickel Quercetin Multi-wall carbon nanotubes Ionic liquids Chemically modified electrode Electrocatalysis |
本文献已被 ScienceDirect 等数据库收录! |
|