An electrochemical sensor based on phytic acid functionalized polypyrrole/graphene oxide nanocomposites for simultaneous determination of Cd(II) and Pb(II)

被引：208
作者：
Dai, Hongxiu [1 ]
Wang, Nan [1 ]
Wang, Donglei [1 ]
Ma, Houyi [1 ]
Lin, Meng [1 ]
机构：
[1] Shandong Univ, Sch Chem & Chem Engn, Key Lab Colloid & Interface Chem State Educ Minis, Jinan 250100, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2016年 / 299卷
基金：
新加坡国家研究基金会; 中国国家自然科学基金;
关键词：
Phytic acid; Polypyrrole; Graphene oxide; Electrochemical detection; Heavy metal ions; GRAPHENE OXIDE/POLYPYRROLE COMPOSITE; HEAVY-METAL IONS; CONDUCTING POLYMERS; FILM; FABRICATION; ELECTRODE; POLYMERIZATION; DOPAMINE; BEHAVIOR; SHEETS;
D O I：
10.1016/j.cej.2016.04.083
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
An electrochemical sensor was developed for detecting heavy metal ions by using a phytic acid functionalized polypyrrole (PPy)/graphene oxide (GO) modified electrode. PPy/GO nanocomposites were synthesized by in situ chemical oxidation polymerization. The PPy/GO nanocomposites were functionalized with phytic acid (PA) molecules by electrostatic attraction. The structural features of the fabricated nanocomposites were confirmed by transmission electron microscopy (TEM), attenuated total reflection infrared (ATR-IR) spectroscopy and Raman spectroscopy. The PA/PPy/GO modified electrode exhibited high electrochemical conductivity, and produced a remarkable increase in peak current compared with the PPy/GO and PA/GO modified electrodes. The developed sensor was used for the electrochemical analysis of various trace metal ions by differential pulse voltammetry (DPV). The modified electrode demonstrated to measure Cd(II) and Pb(II) with a linear working range of 5-150 mu g/L. This work demonstrated a simple, rapid and high performing electrochemical strategy for high-sensitivity detection of heavy metal ions. (C) 2016 Elsevier B.V. All rights reserved.
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收藏
页码：150 / 155
页数：6
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