Electrochemical deposition of gold nanoparticles on reduced graphene oxide modified glassy carbon electrode for simultaneous determination of levodopa, uric acid and folic acid

被引：65
作者：
Benvidi, Ali [1 ]
Dehghani-Firouzabadi, Afsaneh [1 ]
Mazloum-Ardakani, Mohammad [1 ]
Mirjalili, Bi-Bi Fatemeh [1 ]
Zare, Reza [1 ]
机构：
[1] Yazd Univ, Fac Sci, Dept Chem, Yazd 89195741, Iran
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2015年 / 736卷
关键词：
Reduced graphene oxide; Self assembled; Gold nanoparticles; Levodopa; Uric acid; Folic acid; CAPILLARY-ZONE-ELECTROPHORESIS; L-DOPA; ASCORBIC-ACID; VOLTAMMETRIC DETERMINATION; PASTE ELECTRODE; FILM ELECTRODE; CARBIDOPA; NANOTUBE; SENSOR; SURFACE;
D O I：
10.1016/j.jelechem.2014.10.020
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A novel assembly of graphene oxide (RGO), gold nanoparticles and 2-(3,4-dihydroxy phenyl) benzothiazole (DHB) modified glassy carbon electrode (DHB/AuNPs/RGO/GCE) was successfully fabricated by chemical and electrochemical deposition of gold nanoparticles at RGO/GCE and characterized by scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques. This sensor was applied to simultaneous determine levodopa (LD), uric acid (UA) and folic acid (FA). It was observed that an electrochemical deposition of gold nanoparticle has higher electrocatalytic activity for the oxidation of LD, UA and FA compared with chemical deposition. Square wave voltammograms of these compounds showed three well defined and fully resolved anodic oxidation peaks with large current at DHB/AuNPs/RGO/GCE. The proposed electrode was successfully applied for determination of LD, UA and FA in some real samples (such as tablet of Madopar, urine and human blood serum) by the standard addition method. (C) 2014 Elsevier B.V. All rights reserved.
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收藏
页码：22 / 29
页数：8
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