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Journal of Electrochemical Science and Engineering, Vol. 13 No. 2, 2023.

Original scientific paper

https://doi.org/10.5599/jese.1440

Benzimidazole-modified polyaniline micro-shells for electrochemical detection of cadmium in aqueous solution

Eldhose V. Varghese ; Department of Chemistry, Newman College, Thodupuzha 685585, India
Bejoy Thomas ; Department of Chemistry, Newman College, Thodupuzha 685585, India
Carsten Schwandt ; Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, United Kingdom
Praveen C. Ramamurthy ; Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
Alex Joseph ; Department of Chemistry, Newman College, Thodupuzha 685585, India

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Abstract

Benzimidazole-functionalized polyaniline (BMPANI) was synthesized by interfacial poly­merization technique and used for electrochemical sensing of cadmium ions in an aqueous solution. The material was characterized for its structural and morphological features using Fourier-transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), and scanning electron microscopy (SEM). The BMPANI has a micro-shell structure produced from the self-assembly of the monomer units in solution before the polymerization reaction. The material was trialed for cadmium ion sensing using a BMPANI-modified carbon paste electrode (BMPANI-CPE). Electrochemical techniques, i.e., cyclic voltammetry (CV) and differential pulse anodic stripping voltammetry (DPASV), were performed to assess the sensing characteristics of the material. Various electrode preparation parameters, i.e., deposition potential, pH of deposition solution, and thickness of the active layer, were optimized to achieve the highest level of sensitivity. The selectivity towards cadmium ions, interference from other ions, as well as stability and reusability of the BMPANI-CPE, were also examined and found to be satisfactory.

Keywords

Polyaniline; electrochemical biosensor; cyclic voltammetry; differential pulse anodic stripping voltammetry; sensor stability; sensor reusability

Hrčak ID:

294800

URI

https://hrcak.srce.hr/294800

Publication date:

1.3.2023.

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