Skip to the main content

Journal of Electrochemical Science and Engineering, Vol. 15 No. 5, 2025.

Original scientific paper

https://doi.org/10.5599/jese.2729

Ion-imprinted polyaniline-based polymer for selective electrochemical detection of cadmium

Eldhose V. Varghese ; Department of Chemistry, Newman College, Thodupuzha, 685585, India
Roshny Roy ; Department of Chemistry, Newman College, Thodupuzha, 685585, India
Carsten Schwandt ; Advanced Materials Center & Faculty of Electronics, Telecommunications and Informatics, Gdańsk University of Technology, Gdańsk, Poland
Praveen C. Ramamurthy ; Department of Materials Engineering, Indian Institute of Science, Bangalore, 560012, India
Alex Joseph ; Department of Chemistry, Newman College, Thodupuzha, 685585, India *

* Corresponding author.

Full text: english pdf 904 Kb

downloads: 97

cite

Abstract

An electrochemical sensor based on ion-imprinted functionalized polyaniline has been fabricated and tested for the electrochemical sensing of cadmium in aqueous solution. The synthesis of the polymer was started by copolymerizing anthranilic acid and 2-(1H-benzimidazol-2-yl) aniline in the presence of Cd2+ ions as the target analyte and followed by acid leaching out the analyte to obtain the ion-imprinted polymer (IIP). The synthesized IIP was examined for its structural, crystallographic and morphological cha­racteristics using Fourier-transform infrared spectroscopy, X-ray diffraction analysis and field-emission scanning electron microscopy. The IIP has been used to modify a carbon paste electrode (CPE), and the IIP-modified CPE was tested for the sensitive and selective detection of Cd2+ ions in aqueous solution. The key electrode preparation parameters, i.e. Cd deposition potential, pH of deposition solution, deposition time, and thickness of active layer, were optimized using pulse voltammetric stripping analysis to achieve maximum performance. Electrochemical investigations with the optimized IIP-modified CPE revealed a high sensitivity for Cd2+ ions as well as a high selectivity in the presence of potentially interfering ions. Reproducibility and repeatability of the electrode were assessed and found to be satisfactory.

Keywords

Hrčak ID:

335092

URI

https://hrcak.srce.hr/335092

Publication date:

29.6.2025.

Visits: 170 *