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<p>A low-cost and sustainable systematic practices of aqueous one-pot combustion route that can be minimizing environmental waste for fabrication of CdO/La-CdO nanomaterials using bio-extracts act as capping and stabilizing agents. The synthesized samples were well examined by PXRD, TEM, SEM-EDAX, FT-IR, and UV-Visible spectral techniques for their structural confirmation. The CdO/La-CdO nano-framework is primarily exploited for the detection of environmental pollutants (Hg<sup>+</sup> and Li<sup>+</sup> ions) at trace-level using CV and EIS techniques due to its enhanced electronic properties. The emerging electrochemical sensing activities of CdO/La-CdO-graphite paste electrode proved an enhanced selectivity and sensitivity towards Hg<sup>+</sup> and Li<sup>+</sup> ions with different concentrations of 1 to 5 mM at 30mV/s scan rate in 0.1&#xa0;M HCl. Linear Sweep Voltammetry/CV can be used for rapid assessment of electrochemical behavior of tailored nanoparticle with enhanced specific capacitance (Csp = 273&#xa0;F/g). The increased current with inflated concentrations of Hg<sup>+</sup> and Li<sup>+</sup> ions were observed to be + 0.0052 and 4.3 × 10<sup>− 6</sup> A/cm<sup>2</sup> respectively at 1–5 mM at 30 mV/s. LOD and LOQ of La-CdO electrode for Hg<sup>+</sup> ion was noted to be 0.137 mM &amp; 0.415 mM respectively with maximum sensitivity at -0.72&#xa0;V and for Li<sup>+</sup> ions 0.24 mM &amp; 0.68 mM respectively with maximum sensitivity at + 1.85&#xa0;V. The regression line for sensitivity of prepared La-CdO electrode on Hg<sup>+</sup> and Li<sup>+</sup> ions are confirmed by its R<sup>2</sup> values of 0.9508 and 0.9570 respectively, signifying a potentially improvable correlation for quantitative detection. The La-CdO photocatalyst exhibited outstanding photodegradation efficiency against Amranth (AMR) dye, reached 90% degradation in 125&#xa0;min under Sunlight irradiation was discussed. The tailored CdO/La-CdO-graphite paste electrode assists the advanced selectivity, sensitivity, and fast measurement for detection of heavy metal entities poses an evidential threat to vitality and monitoring.</p>

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Recent advances in selective and sensitive electrochemical spotting of toxic mercury (Hg+) and lithium (Li+) ions utilizing modified La-CdO/CdO electrode and its photocatalytic applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月24日

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  • B. S. Surendra,
  • H. N. Sowmya,
  • B. R. Vidya,
  • R. Shruthi,
  • B. P. Deepthi,
  • M. Bhaskar,
  • Kar-Ban Tan,
  • H. C. Ananda Murthy,
  • Kah-Yoong Chan

摘要

A low-cost and sustainable systematic practices of aqueous one-pot combustion route that can be minimizing environmental waste for fabrication of CdO/La-CdO nanomaterials using bio-extracts act as capping and stabilizing agents. The synthesized samples were well examined by PXRD, TEM, SEM-EDAX, FT-IR, and UV-Visible spectral techniques for their structural confirmation. The CdO/La-CdO nano-framework is primarily exploited for the detection of environmental pollutants (Hg+ and Li+ ions) at trace-level using CV and EIS techniques due to its enhanced electronic properties. The emerging electrochemical sensing activities of CdO/La-CdO-graphite paste electrode proved an enhanced selectivity and sensitivity towards Hg+ and Li+ ions with different concentrations of 1 to 5 mM at 30mV/s scan rate in 0.1 M HCl. Linear Sweep Voltammetry/CV can be used for rapid assessment of electrochemical behavior of tailored nanoparticle with enhanced specific capacitance (Csp = 273 F/g). The increased current with inflated concentrations of Hg+ and Li+ ions were observed to be + 0.0052 and 4.3 × 10− 6 A/cm2 respectively at 1–5 mM at 30 mV/s. LOD and LOQ of La-CdO electrode for Hg+ ion was noted to be 0.137 mM & 0.415 mM respectively with maximum sensitivity at -0.72 V and for Li+ ions 0.24 mM & 0.68 mM respectively with maximum sensitivity at + 1.85 V. The regression line for sensitivity of prepared La-CdO electrode on Hg+ and Li+ ions are confirmed by its R2 values of 0.9508 and 0.9570 respectively, signifying a potentially improvable correlation for quantitative detection. The La-CdO photocatalyst exhibited outstanding photodegradation efficiency against Amranth (AMR) dye, reached 90% degradation in 125 min under Sunlight irradiation was discussed. The tailored CdO/La-CdO-graphite paste electrode assists the advanced selectivity, sensitivity, and fast measurement for detection of heavy metal entities poses an evidential threat to vitality and monitoring.