Electrochemical sensor for catechol detection: Leveraging ITO@TiO2/RGO/Pt nanocomposites for enhanced water quality monitoring

Rimsha Larik, Aamna Balouch*, Esra Alveroğlu Durucu, Hulya Silah, Abdullah, Muhammad Saqaf Jagirani, Muhammad Yaqoob soomro

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Recent advancements in sensor technology have led to the development of an ITO@TiO2/RGO/Pt nanocomposite-based electrocatalyst for the detection of catechol (1,2-dihydroxybenzene) in water. Catechol is a harmful contaminant affecting human and aquatic life through polluted water and food. The nanocomposites were characterized using UV–Vis, FT-IR, FESEM, EDX, XRD, BET, zeta potential, and particle size analysis to evaluate their functionalities, morphology, composition, and surface properties. ITO glass was modified with these nanocomposites via the drop-casting method. Electrochemical characterization, including cyclic voltammetry and impedance spectroscopy, indicated optimal sensor performance with a scanning rate of 100 mV/s and pH 7 PBS, displaying a strong catechol response. The sensor demonstrated a linear range of 5–105 µM with limits of detection (LOD) and quantification (LOQ) of 0.013 and 0.046 µM, respectively, and recovery rates between 97.1 % and 101.3 % in water samples. It achieved over 7,580 turnovers with a TOF of 97.5 (mol Catalyst)-1·(min)-1, though the TOF decreased to 34.45 after multiple uses.

Original languageEnglish
Article number117966
JournalMaterials Science and Engineering: B
Volume313
DOIs
Publication statusPublished - Mar 2025

Bibliographical note

Publisher Copyright:
© 2024 Elsevier B.V.

Keywords

  • Catechol
  • Electrochemical sensor
  • Environmental pollution
  • ITO@TiO2RGO Pt
  • Reduced Graphene oxide-based Nanocomposites

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