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Trithiocarbonate-mediated RAFT synthesis of a block copolymer: Silver nanoparticles integration and sensitive recognition of Hg2+

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Abstract

Heavy metal ions, such as Hg2+, pose severe risks to the environment and human health. Therefore, sensitive determination of Hg2+ is necessary. Methyl methacrylate (MMA) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) are used for the preparation of poly(MMA) (PMMA), poly(AMPS) (PAMPS), and a block copolymer, PMMA-b-PAMPS. The PMMA-b-PAMPS is further used for the synthesis of a silver nanocomposite, represented as Ag–(PMMA-b-PAMPS). The homopolymerization of MMA and AMPS is achieved by reversible addition-fragmentation chain transfer methodology using benzyl ethyl trithiocarbonate as a chain transfer agent. The synthesized polymers are characterized by several techniques including scanning electron microscopy (SEM) and X-ray diffraction (XRD). The Ag–(PMMA-b-PAMPS) is characterized by SEM, XRD, transmission electron microscopy, X-ray photoelectron spectroscopy, and electrochemical techniques. Further, Ag–(PMMA-b-PAMPS) is exploited to construct an electrochemical sensing platform on a glassy carbon electrode surface for the sensitive determination of toxic Hg2+ present in trace amounts. The electrochemical characteristics of Ag–(PMMA-b-PAMPS) are analyzed with and without Hg2+ using cyclic voltammetry in 0.1 M pH 7.0 phosphate buffer at 20 mVs−1 scan rate.

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Funding

This work was supported by the Institute of Eminence (Scheme No. 6031) program of Banaras Hindu University and UGC New Delhi (F. No. 42-387/2013 (SR)). Further, the authors are also thankful to IIT Kanpur for XPS characterization.

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Authors and Affiliations

  1. Department of Chemistry, School of Physical Sciences, Guru Ghasidas Vishwavidyalaya, Bilaspur, CG, 495009, India

    Koushik Nandy & Arti Srivastava

  2. Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, UP, 221005, India

    Shere Afgan, Rajesh Kumar, Dharmendra Kumar Yadav & Vellaichamy Ganesan

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  1. Koushik Nandy
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Nandy, K., Srivastava, A., Afgan, S. et al. Trithiocarbonate-mediated RAFT synthesis of a block copolymer: Silver nanoparticles integration and sensitive recognition of Hg2+. Polym. Bull. 80, 4061–4083 (2023). https://doi.org/10.1007/s00289-022-04239-6

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