An electrochemical sensor based on phytic acid functionalized polypyrrole/graphene oxide nanocomposites for simultaneous determination of Cd(II) and Pb(II)
| Autor: | D.G. Wang, Houyi Ma, Meng Lin, Nan Wang, Hongxiu Dai |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Graphene General Chemical Engineering Metal ions in aqueous solution Inorganic chemistry 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry Polypyrrole 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences Electrochemical gas sensor law.invention chemistry.chemical_compound chemistry law Attenuated total reflection Electrode Environmental Chemistry Differential pulse voltammetry 0210 nano-technology |
| Zdroj: | Chemical Engineering Journal. 299:150-155 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2016.04.083 |
| Popis: | 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 μg/L. This work demonstrated a simple, rapid and high performing electrochemical strategy for high-sensitivity detection of heavy metal ions. |
| Databáze: | OpenAIRE |
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