Electrospun Carbon Nanofiber Modified Electrodes for Stripping Voltammetry

被引：69

作者：

Zhao, Daoli ^{[1
]}

Wang, Tingting ^{[1
]}

Han, Daewoo ^{[2
]}

Rusinek, Cory ^{[1
]}

Steckl, Andrew J. ^{[2
]}

Heineman, William R. ^{[1
]}

机构：

[1] Univ Cincinnati, Dept Chem, Cincinnati, OH 45221 USA

[2] Univ Cincinnati, Dept Elect Engn & Comp Syst, Nanoelect Lab, Cincinnati, OH 45221 USA

来源：

ANALYTICAL CHEMISTRY | 2015年 / 87卷 / 18期

基金：

美国国家科学基金会;

关键词：

BISMUTH-FILM ELECTRODES; ELECTROCHEMICAL PROPERTIES; COMPOSITE ELECTRODES; NANOTUBE ELECTRODES; HEAVY-METALS; TRACE-METALS; NAFION FILM; POLYACRYLONITRILE; CADMIUM; LEAD;

D O I：

10.1021/acs.analchem.5b02017

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Electrospun polyacrylonitrile (PAN) based carbon nanofibers (CNFs) have attracted intense attention due to their easy processing, high carbon yield, and robust mechanical properties. In this work, a CNF modified glassy carbon (GC) electrode that was coated with Nafion polymer was evaluated as a new electrode material for the simultaneous determination of trace levels of heavy metal ions by anodic stripping voltammetry (ASV). Pb2+ and Cd2+ were used as a representative system for this initial study. Well-defined stripping voltammograms were obtained when Pb2+ and Cd2+ were determined individually and then simultaneously in a mixture. Compared to a bare GC electrode, the CNF/Nafion modified GC (CNF/Nafion/GC) electrode improved the sensitivity for lead detection by 8-fold. The interface properties of the CNF/Nafion/GC were characterized by electrochemical impedance spectroscopy (EIS), which showed the importance of the ratio of CNF/Nafion on electrode performance. Under optimized conditions, the detection limits are 0.9 and 1.5 nM for Pb2+ and Cd2+, respectively.

引用

页码：9315 / 9321

页数：7

共 43 条

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