A highly explicit electrochemical biosensor for catechol detection in real samples based on copper-polypyrrole

Qasar Saleem, Sammia Shahid, Abdur Rahim, Majed A. Bajaber, Sana Mansoor, Mohsin Javed, Shahid Iqbal, Ali Bahadur, Samar O. Aljazzar, Rami Adel Pashameah, Samah A. AlSubhi, Eman Alzahrani, Abd El Aziem Farouk

Research output: Journal PublicationArticlepeer-review


Catechol is a pollutant that can lead to serious health issues. Identification in aquatic environments is difficult. A highly specific, selective, and sensitive electrochemical biosensor based on a copper-polypyrrole composite and a glassy carbon electrode has been created for catechol detection. The novelty of this newly developed biosensor was tested using electrochemical techniques. The charge and mass transfer functions and partially reversible oxidation kinetics of catechol on the redesigned electrode surface were examined using electrochemical impedance spectroscopy and cyclic voltammetry scan rates. Using cyclic voltammetry, chronoamperometry, and differential pulse voltammetry, the characteristics of sensitivity (8.5699 μA cm−2), LOD (1.52 × 10−7 μM), LOQ (3.52 × 10−5 μM), linear range (0.02-2500 μM), specificity, interference, and real sample detection were investigated. The morphological, structural, and bonding characteristics were investigated using XRD, Raman, FTIR, and SEM. Using an oxidation-reduction technique, a suitable biosensor material was produced. In the presence of interfering compounds, it was shown that it was selective for catechol, like an enzyme.

Original languageEnglish
Pages (from-to)13443-13455
Number of pages13
JournalRSC Advances
Issue number20
Publication statusPublished - 3 May 2023
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)


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