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<p>Environmental phenolic pollutants such as 2,4,6-trichlorophenol (TCP) require sensitive detection because of their persistence and toxicity. Herein, sonochemically synthesized NiMn(PO<sub>4</sub>)<sub>2</sub> (NMPO) micro-flakes were developed as an electrochemical interface for TCP determination. The hierarchical micro-flake morphology and synergistic Ni/Mn redox centers promote TCP adsorption, interfacial electron transfer, and electrocatalytic oxidation. Compared with bare GCE, NMPO/GCE exhibited a markedly enhanced TCP oxidation response and reduced charge-transfer resistance. Under optimized conditions, differential pulse voltammetry showed two linear ranges of 0.001–0.020 µM and 0.5–12 µM, with a detection limit of 0.7 nM. The sensor demonstrated good repeatability (RSD &lt; 2%), reproducibility (RSD = 1.4%), operational stability (97.1% signal retention), and selectivity toward TCP over common interferents. Spiked human urine analysis gave recoveries of 94–104%, confirming practical applicability. These results highlight NMPO micro-flakes as a simple and reliable platform for ultrasensitive TCP monitoring.</p>

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Bimetallic phosphate interface for ultrasensitive detection of 2,4,6-trichlorophenol

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • Bharat Prasad Sharma,
  • Qingyun Xiong,
  • Razium Ali Soomro,
  • Amal M. Alkhudaydi,
  • Mohamed M. Ibrahim,
  • Zeinhom M. El-Bahy,
  • Jinping Xiong,
  • Selcan Karakuş

摘要

Environmental phenolic pollutants such as 2,4,6-trichlorophenol (TCP) require sensitive detection because of their persistence and toxicity. Herein, sonochemically synthesized NiMn(PO4)2 (NMPO) micro-flakes were developed as an electrochemical interface for TCP determination. The hierarchical micro-flake morphology and synergistic Ni/Mn redox centers promote TCP adsorption, interfacial electron transfer, and electrocatalytic oxidation. Compared with bare GCE, NMPO/GCE exhibited a markedly enhanced TCP oxidation response and reduced charge-transfer resistance. Under optimized conditions, differential pulse voltammetry showed two linear ranges of 0.001–0.020 µM and 0.5–12 µM, with a detection limit of 0.7 nM. The sensor demonstrated good repeatability (RSD < 2%), reproducibility (RSD = 1.4%), operational stability (97.1% signal retention), and selectivity toward TCP over common interferents. Spiked human urine analysis gave recoveries of 94–104%, confirming practical applicability. These results highlight NMPO micro-flakes as a simple and reliable platform for ultrasensitive TCP monitoring.