Synthesis of Pt/ionic liquid/graphene nanocomposite and its simultaneous determination of ascorbic acid and dopamine

被引：154

作者：

Li, Fenghua

Chai, Jia

Yang, Huafeng

Han, Dongxue

Niu, Li ^{[1
]}

机构：

[1] Chinese Acad Sci, Engn Lab Modern Analyt Tech, State Key Lab Electroanalyt Chem, Changchun Inst Appl Chem, Changchun 130022, Peoples R China

来源：

TALANTA | 2010年 / 81卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Graphene sheets; Platinum nanoparticles; Ionic liquid; Ascorbic acid; Dopamine; EXFOLIATED GRAPHITE OXIDE; MODIFIED ELECTRODE; IONIC LIQUID; GRAPHENE NANOSHEETS; AQUEOUS DISPERSIONS; SELECTIVE DETECTION; NANOPARTICLES; REDUCTION; FILMS;

D O I：

10.1016/j.talanta.2010.01.061

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A water-soluble and electroactive composite - Pt nanoparticles/polyelectrolyte-functionalized ionic liquid (PFIL)/graphene sheets (GS) nanocomposite was synthesized in one pot. The structure and composition of the Pt/PFIL/GS nanocomposite were studied by means of ultraviolet-visible (UV-vis) and X-ray photoelectron spectra (XPS). Scanning electron microscopy (SEM) and transmission electron microscope (TEM) images reveal Pt nanoparticles are densely dispersed on the transparent thin PHL-functionalized graphene sheets. The obtained Pt/PFIL/GS nanocomposite-modified electrode was fabricated to simultaneously determine ascorbic acid (AA) and dopamine (DA) by cyclic voltammetry. It is worthwhile noting that the difference between the two peak potentials of AA and DA oxidation is over 200 mV, which leads to distinguishing AA from DA. The detection of increasing concentrations of AA in the presence of DA and the oxidation of continuous addition of DA in the presence of AA were also studied using differential pulse voltammetry. The proposed sensor in real sample analysis was also examined in human urine samples. Three independent oxidation peaks appear in urine sample containing AA and DA. Therefore, the Pt/PFIL/GS nanocomposite might offer a good possibility for applying it to routine analysis of AA and DA in clinical use. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1063 / 1068

页数：6

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