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Environ Sci Pollut Res Int. 2018 Jul;25(20):20012-20022. doi: 10.1007/s11356-018-2140-x. Epub 2018 May 9.

Tracking metal ions with polypyrrole thin films adhesively bonded to diazonium-modified flexible ITO electrodes.

Author information

1
Faculté des Sciences, Université Cheikh Anta Diop, 5005, Dakar, BP, Senegal.
2
Laboratoire Géomatériaux et Environnement, Université Paris-Est, 4508, UPEM, 77454, Marne-la-Vallée cedex 2, EA, France.
3
Université Paris Est, CNRS, ICMPE (UMR 7182), 2-8 rue Henri Dunant, 94320, Thiais, France.
4
Faculté des Sciences, Université Cheikh Anta Diop, 5005, Dakar, BP, Senegal. diariatougningue.sall@ucad.edu.sn.
5
Laboratoire Géomatériaux et Environnement, Université Paris-Est, 4508, UPEM, 77454, Marne-la-Vallée cedex 2, EA, France. jeanjacquesaaron@yahoo.fr.
6
Université Paris Est, CNRS, ICMPE (UMR 7182), 2-8 rue Henri Dunant, 94320, Thiais, France. chehimi@icmpe.cnrs.fr.

Abstract

Adhesively bonded polypyrrole thin films doped with benzene sulfonic acid (BSA) were electrodeposited on aminobenzenediazonium-modified flexible ITO electrodes and further employed for the detection of Pb2+, Cu2+, and Cd2+ metal ions in aqueous medium. The aminophenyl (AP) adhesive layer was grafted to ITO by electroreduction of the in situ generated parent diazonium compound. Polypyrrole (PPy) thin films exhibited remarkable adhesion to aminophenyl (ITO-AP). The strongly adherent polypyrrole films exhibited excellent electroactivity in the doped state with BSA which itself served to chelate the metal ions in aqueous medium. The surface of the resulting, modified flexible electrode was characterized by XPS, SEM, and electrochemical methods. The ITO-AP-PPy electrodes were then used for the simultaneous detection of Cu2+, Cd2+, and Pb2+ by differential pulse voltammetry (DPV). The detection limits were 11.1, 8.95, and 0.99 nM for Cu2+, Cd2+, and Pb2+, respectively. In addition, the modified electrodes displayed a good reproducibility, making them suitable for the determination of heavy metals in real wastewater samples.

KEYWORDS:

Diazonium salts; Electroanalysis; Electropolymerization; Flexible ITO; Heavy metal ions; Polypyrrole

PMID:
29744780
DOI:
10.1007/s11356-018-2140-x
[Indexed for MEDLINE]

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