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<p>The development of multifunctional materials is essential due to the increasing demand for efficient energy storage and effluent remediation. In this study, a hybrid nanostructure comprising graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) and Cu–ZnS was synthesized to function as a dual-purpose material for photocatalytic degradation and supercapacitor applications. The formation of a mixed-phase Cu–ZnS/g-C<sub>3</sub>N<sub>4</sub> composite with both cubic and hexagonal ZnS structures was confirmed by powder X-ray diffraction (XRD). The uniform dispersion of Cu–ZnS nanoparticles over g-C<sub>3</sub>N<sub>4</sub> sheets was demonstrated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses. BET analysis indicated a 1.6-fold increase in surface area (148.16 m<sup>2</sup>/g) for CuZnS-GCN25 compared to bare CuZnS. Electrochemical evaluation showed that CuZnS-GCN25 delivered a high specific capacitance of 275 F g<sup>−1</sup> at 1 A g<sup>−1</sup>, excellent cycling stability (92.5% after 10,000 cycles) and 70% capacitance retention at 20 A g<sup>−1</sup> in a two-electrode setup. In photocatalytic testing, CuZnS-GCN25 achieved 92.4% degradation of amoxicillin (AMX) within 60&#xa0;min under visible light, following pseudo-first-order kinetics with a rate constant of 0.029&#xa0;min<sup>−1</sup>. These results highlight the potential of CuZnS-GCN25 as a high-performance, eco-friendly material for integrated energy and environmental remediation systems.</p>

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Construction of g-C3N4 anchored Cu-ZnS hybrid nanostructures for sustainable energy storage and environmental remediation

  • 期刊论文

  • 发表日期：

    2025年8月19日

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  • Maganti Syamala,
  • Diksha Srivastava,
  • Sachin Dadu Khandekar,
  • T. Porselvi,
  • Muzeeb Khan Patan,
  • Allam Balaram,
  • S. Kumaran

摘要

The development of multifunctional materials is essential due to the increasing demand for efficient energy storage and effluent remediation. In this study, a hybrid nanostructure comprising graphitic carbon nitride (g-C3N4) and Cu–ZnS was synthesized to function as a dual-purpose material for photocatalytic degradation and supercapacitor applications. The formation of a mixed-phase Cu–ZnS/g-C3N4 composite with both cubic and hexagonal ZnS structures was confirmed by powder X-ray diffraction (XRD). The uniform dispersion of Cu–ZnS nanoparticles over g-C3N4 sheets was demonstrated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses. BET analysis indicated a 1.6-fold increase in surface area (148.16 m2/g) for CuZnS-GCN25 compared to bare CuZnS. Electrochemical evaluation showed that CuZnS-GCN25 delivered a high specific capacitance of 275 F g−1 at 1 A g−1, excellent cycling stability (92.5% after 10,000 cycles) and 70% capacitance retention at 20 A g−1 in a two-electrode setup. In photocatalytic testing, CuZnS-GCN25 achieved 92.4% degradation of amoxicillin (AMX) within 60 min under visible light, following pseudo-first-order kinetics with a rate constant of 0.029 min−1. These results highlight the potential of CuZnS-GCN25 as a high-performance, eco-friendly material for integrated energy and environmental remediation systems.