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<p>The surface plasmon resonance of silver nanoparticles (Ag NPs) can be exploited for the detection of heavy metals. Yet again, these Ag NPs can bring about catalytic activity on their large surfaces. To utilize the above said properties, Ag NPs supported on functionalized hexagonal boron nitride (<i>h</i>-BN): (Ag@<i>h</i>-BN) was developed by a simple biogenic approach using aqueous-ethanolic extract of cardamom leaves. The characterization of the Ag@<i>h</i>-BN by various analytical techniques confirmed the formation of Ag NPs with face centered cubic structure with spherical morphology uniformly distributed onto the functionalized support. Subsequently, the Ag@<i>h</i>-BN was evaluated for its potential as a colorimetric nanoprobe for the detection of the ubiquitous toxic Hg<sup>2+</sup> ions in water. The Ag@<i>h</i>-BN displayed acceptable selectivity and sensitivity towards Hg<sup>2+</sup> ions with a linear detection range of 0–600 µM, limit of detection of 57.45 µM and limit of quantification of 174.09 µM. In addition, the Ag@<i>h</i>-BN exhibited acceptable tolerance to Hg<sup>2+</sup> sensing in the presence of other interfering cations. To extend the competence of the Ag@<i>h</i>-BN to wastewater treatment, it was employed as a nanocatalyst for the degradation of the organic diazo dye molecule Congo red. The red color dye underwent 99.57% degradation in 3&#xa0;min with a rate constant of 8.32 × 10<sup>−3</sup> s<sup>−1</sup> signifying its catalytic potential in wastewater treatment as well. Alternatively, the Ag@<i>h</i>-BN was investigated for its competency in varying pH and water samples for the above applications.</p>

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Biogenic silver nanoparticles supported on hexagonal boron nitride for colorimetric detection of Hg2+ and treatment of water pollutants in aqueous medium

  • 期刊论文

  • 发表日期：

    2025年2月25日

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  • Arnet Maria Antony,
  • Abhishek Kumar,
  • C. V. Yelamaggad,
  • Siddappa A. Patil

摘要

The surface plasmon resonance of silver nanoparticles (Ag NPs) can be exploited for the detection of heavy metals. Yet again, these Ag NPs can bring about catalytic activity on their large surfaces. To utilize the above said properties, Ag NPs supported on functionalized hexagonal boron nitride (h-BN): (Ag@h-BN) was developed by a simple biogenic approach using aqueous-ethanolic extract of cardamom leaves. The characterization of the Ag@h-BN by various analytical techniques confirmed the formation of Ag NPs with face centered cubic structure with spherical morphology uniformly distributed onto the functionalized support. Subsequently, the Ag@h-BN was evaluated for its potential as a colorimetric nanoprobe for the detection of the ubiquitous toxic Hg2+ ions in water. The Ag@h-BN displayed acceptable selectivity and sensitivity towards Hg2+ ions with a linear detection range of 0–600 µM, limit of detection of 57.45 µM and limit of quantification of 174.09 µM. In addition, the Ag@h-BN exhibited acceptable tolerance to Hg2+ sensing in the presence of other interfering cations. To extend the competence of the Ag@h-BN to wastewater treatment, it was employed as a nanocatalyst for the degradation of the organic diazo dye molecule Congo red. The red color dye underwent 99.57% degradation in 3 min with a rate constant of 8.32 × 10−3 s−1 signifying its catalytic potential in wastewater treatment as well. Alternatively, the Ag@h-BN was investigated for its competency in varying pH and water samples for the above applications.