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<p>This study investigates the optoelectronic performance of quaternary Cu<sub>2</sub>NiSnS<sub>4</sub> (CNTS) nanoparticles for efficient solar-driven photocatalytic degradation of Congo Red, a persistent and toxic azo dye. The research addresses the critical need for efficient and low-cost materials for sustainable water treatment. The CNTS nanoparticles were synthesized via a facile hydrothermal route and characterized using X-ray diffraction (XRD), Scanning Electron Microscopy, Energy Dispersive X-Ray Spectroscopy (EDX) and UV-Visible spectroscopy. XRD confirmed a cubic crystal structure for the hydrothermally synthesized CNTS nanoparticles, SEM revealed a hierarchical morphology composed of interconnected plate-like and nanosheet structures while UV-Vis spectroscopy displayed a strong and broad absorption within the UV-Vis range. The band gap of 1.42&#xa0;eV indicates semiconducting behavior and demonstrates its suitability for visible-light driven photocatalytic applications. Under natural solar irradiation, the CNTS catalyst demonstrated high photocatalytic activity, achieving 96% removal of Congo Red within 120&#xa0;min. Total organic carbon (TOC) analysis revealed a mineralization efficiency of 63%, indicating substantial degradation of the dye beyond simple decolorization. Furthermore, the catalyst maintained a degradation efficiency of 85% after three consecutive cycles, showing good reusability and sustained photocatalytic performance, which are important considerations for practical wastewater treatment applications. Overall, these findings showcase CNTS as a promising photocatalyst for the removal of organic dye pollutants from wastewater under sunlight irradiation.</p>

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Sunlight-driven photocatalytic degradation of Congo Red using hydrothermally-synthesized quaternary Cu2NiSnS4 nanoparticles for wastewater remediation

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月30日

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  • Sodiq Tolulope Yussuf,
  • Abisola O. Egbedina,
  • Adeola Ahmed Ibikunle,
  • Nurudeen Olanrewaju Sanyaolu,
  • Segun Ajibola Ogundare,
  • Samuel Inaolaji Olusesan,
  • Omolade Owodolu,
  • Olayinka Afeez Bankole

摘要

This study investigates the optoelectronic performance of quaternary Cu2NiSnS4 (CNTS) nanoparticles for efficient solar-driven photocatalytic degradation of Congo Red, a persistent and toxic azo dye. The research addresses the critical need for efficient and low-cost materials for sustainable water treatment. The CNTS nanoparticles were synthesized via a facile hydrothermal route and characterized using X-ray diffraction (XRD), Scanning Electron Microscopy, Energy Dispersive X-Ray Spectroscopy (EDX) and UV-Visible spectroscopy. XRD confirmed a cubic crystal structure for the hydrothermally synthesized CNTS nanoparticles, SEM revealed a hierarchical morphology composed of interconnected plate-like and nanosheet structures while UV-Vis spectroscopy displayed a strong and broad absorption within the UV-Vis range. The band gap of 1.42 eV indicates semiconducting behavior and demonstrates its suitability for visible-light driven photocatalytic applications. Under natural solar irradiation, the CNTS catalyst demonstrated high photocatalytic activity, achieving 96% removal of Congo Red within 120 min. Total organic carbon (TOC) analysis revealed a mineralization efficiency of 63%, indicating substantial degradation of the dye beyond simple decolorization. Furthermore, the catalyst maintained a degradation efficiency of 85% after three consecutive cycles, showing good reusability and sustained photocatalytic performance, which are important considerations for practical wastewater treatment applications. Overall, these findings showcase CNTS as a promising photocatalyst for the removal of organic dye pollutants from wastewater under sunlight irradiation.