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<p>Conductive polyaniline-coupled ZnBi<sub>2</sub>S<sub>3</sub> nanocomposites ((PANI@ZBS NCs) were synthesized through a hydrothermal-assisted oxidative polymerization route and investigated for their dual functionality in electrochemical detection of ciprofloxacin (CIP) and photocatalytic degradation of CIP and tetracycline hydrochloride (TCH). The successful formation of the nanocomposite was confirmed by UV–Vis spectroscopy, XRD, FE-SEM, EDX, XPS, and TEM analyses, which revealed reduced band gap (2.8&#xa0;eV), high crystallinity, homogeneous elemental distribution, strong interfacial interaction between PANI and ZnBi<sub>2</sub>S<sub>3</sub>, and a polycrystalline nanostructure with enhanced charge transport properties. For electrochemical sensing of CIP only, the PANI@ZBS-modified glassy carbon electrode (GCE) exhibited enhanced charge transfer and a larger active surface area, delivering a linear range of 1-120 M, a limit of detection (LOD) of 0.43 µM, a limit of quantification (LOQ) of 1.43 µM, and a sensitivity of approximately 1.13 µAµM<sup>−1</sup>cm<sup>−2</sup>. The sensor was effectively utilized to CIP determination in hospital wastewater with good recovery. In photocatalytic studies, the same PANI@ZBS NCs degraded both CIP and TCH under visible light, attaining 79.1% CIP degradation and 88.6% TCH degradation within 90&#xa0;min, with apparent rate constants of 0.0364&#xa0;min<sup>−1</sup> and 0.0211&#xa0;min<sup>−1</sup>, respectively. Recyclability and radical scavenger tests indicated great stability and that reactive holes and superoxide species were the predominant active species. Overall, the PANI@ZBS NCs displayed enormous promise as a dual-functional material for CIP sensing and antibiotic photodegradation in wastewater.</p>

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Conductive polyaniline coupled ZnBi2S3 nano chalcogenide for electrochemical detection of ciprofloxacin and photocatalytic degradation of antibiotics

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年8月5日

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  • Mallikarjuna Akshay,
  • Honnegowdanahalli Shivabasappa Nagendra Prasad,
  • Murudagalli Basavaraju Shivaswamy,
  • Arsikere Ramesh Anusha Gowda,
  • Nagarajappa Vidya,
  • Madanahalli Ankanathappa Sangamesha,
  • Vinod Divya,
  • Zia Ul Sabah,
  • Shadma Wahab,
  • Harikaranahalli Puttaiah Shivaraju

摘要

Conductive polyaniline-coupled ZnBi2S3 nanocomposites ((PANI@ZBS NCs) were synthesized through a hydrothermal-assisted oxidative polymerization route and investigated for their dual functionality in electrochemical detection of ciprofloxacin (CIP) and photocatalytic degradation of CIP and tetracycline hydrochloride (TCH). The successful formation of the nanocomposite was confirmed by UV–Vis spectroscopy, XRD, FE-SEM, EDX, XPS, and TEM analyses, which revealed reduced band gap (2.8 eV), high crystallinity, homogeneous elemental distribution, strong interfacial interaction between PANI and ZnBi2S3, and a polycrystalline nanostructure with enhanced charge transport properties. For electrochemical sensing of CIP only, the PANI@ZBS-modified glassy carbon electrode (GCE) exhibited enhanced charge transfer and a larger active surface area, delivering a linear range of 1-120 M, a limit of detection (LOD) of 0.43 µM, a limit of quantification (LOQ) of 1.43 µM, and a sensitivity of approximately 1.13 µAµM−1cm−2. The sensor was effectively utilized to CIP determination in hospital wastewater with good recovery. In photocatalytic studies, the same PANI@ZBS NCs degraded both CIP and TCH under visible light, attaining 79.1% CIP degradation and 88.6% TCH degradation within 90 min, with apparent rate constants of 0.0364 min−1 and 0.0211 min−1, respectively. Recyclability and radical scavenger tests indicated great stability and that reactive holes and superoxide species were the predominant active species. Overall, the PANI@ZBS NCs displayed enormous promise as a dual-functional material for CIP sensing and antibiotic photodegradation in wastewater.