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ORIGINAL RESEARCH article

Front. Chem.
Sec. Nanoscience
Volume 12 - 2024 | doi: 10.3389/fchem.2024.1358353
This article is part of the Research Topic Advances in Nanotechnology for the Removal and Detection of Emerging Contaminants From Water View all 4 articles

Efficient Nitrite determination by electrochemical approach in liquid phase with ultrasonically prepared Gold nanoparticle conjugated conducting polymer Nanocomposites

Provisionally accepted
M Faisal M Faisal 1Dr. M. M. Alam Dr. M. M. Alam 2Jahir Ahmed Jahir Ahmed 1Abdullah M. Asiri Abdullah M. Asiri 2Jari Algethami Jari Algethami 1Raed H. Altholami Raed H. Altholami 3Farid A. Harraz Farid A. Harraz 1Mohammed M. Rahman Mohammed M. Rahman 2*
  • 1 Najran University, Najran, Saudi Arabia
  • 2 King Abdulaziz University, Jeddah, Makkah, Saudi Arabia
  • 3 Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia

The final, formatted version of the article will be published soon.

    In this approach, an electrochemical nitrite sensor probe was introduced by using a modified flat glassy carbon electrode (GCE) with spherical shaped gold nanoparticles (Au-NPs) decorated SrTiO3 doped material, polypyrrole-carbon (Au-NPs/PPyC/SrTiO3 NCs) at pH of 7.0 in phosphate buffer solution (PBS). Nanocomposites (NCs) of Au-NPs, PPyC, and SrTiO3 were synthesized by ultrasonication. Later NCs properties were also thoroughly characterized by using structural, elemental, optical and morphological analysis with various conventional spectroscopic methods including powder FESEM, EDS, HR-TEM, XRD, XPS, BET etc. Peak currents due to nitrite oxidation were characterized in details and analyzed by using conventional cyclic voltammetry (CV) as well as differential pulse voltammetry (DPV) in a room conditions. The sensor response increased significantly from 0.15 to 1.5 mM of nitrite ion, which was fabricated with conducting coating agent (PEDOT:PSS) onto GCE as Au-NPs/PPyC/SrTiO3 NCs/PEDOT:PSS/GCE probe. The sensor's sensitivity was determined as 0.5 µA.µM -1 .cm -2 from the ratio of the slope of the linear detection range (LDR) by considering the active surface area (0.0316 cm 2 ) of flat-GCE. In addition, the LOD was determined as 20.00±1.00 µM, which is found satisfactory results. The sensor's stability, pH optimization, and reliability were also evaluated in these analyses. The overall sensor results were found to be good and satisfactory. Real environmental samples were analyzed to test the sensor's reliability by DPV. The results showed that this novel electrochemical sensor has great potential for mitigating water contamination in the real collected samples with lab-made nanocomposite of Au-NPs/PPyC/SrTiO3. This study provides the valuable insights for improving electrochemical sensors for environmental monitoring applications in a broad scale using electrochemical approach.

    Keywords: Au-NPs/PPyC/SrTiO3 nanocomposites, Nitrite detection, glassy carbon electrode, differential pulse voltammetry, Environmental Remediation

    Received: 19 Dec 2023; Accepted: 26 Jun 2024.

    Copyright: © 2024 Faisal, Alam, Ahmed, Asiri, Algethami, Altholami, Harraz and Rahman. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Mohammed M. Rahman, King Abdulaziz University, Jeddah, 21589, Makkah, Saudi Arabia

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.