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<p>The swift recombination of photoinduced charge carriers remains a persistent challenge in photocatalysis. To address this problem, a co-precipitation route is employed to fabricate a highly efficient heterojunction-based photocatalyst consisting of Zinc oxide (ZnO) with varying percentages (10, 30, and 50%) of copper sulfide (CuS) incorporated into the host material. The achievement of composite configurations is confirmed through the characterization of the prepared nanostructures using X-ray diffraction, field emission scanning electron microscopy coupled with energy-dispersive spectroscopy, diffuse reflectance absorption spectroscopy, and photoluminescence spectroscopy. The synthesized ZnO/CuS nanostructures exhibit remarkable photocatalytic performance under visible light illumination in methylene blue (MB) dye degradation. The optimal sample (ZnO-10% CuS) showed a maximum MB degradation of 99.5% in 15&#xa0;min compared to bare ZnO, which degraded 95%, and CuS nanostructure (97% degradation) in 90&#xa0;min. This study revealed that ZnO nanostructures exhibit significant separation of photoinduced charge carriers and notable augmentation of light absorption abilities through the implementation of CuS. Moreover, this investigation offers valuable insights into the mechanism of charge transfer and photocatalysis exhibited by the ZnO/CuS nanostructures. The findings of this study have broader environmental and industrial relevance, as the efficient photocatalytic degradation of methylene blue highlights the potential of ZnO/CuS nanostructures for sustainable wastewater treatment and pollution control applications.</p>

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ZnO/CuS nanocomposites for efficient visible light-driven degradation of methylene blue: mechanisms and performance evaluation

  • 期刊论文

  • 发表日期：

    2025年6月11日

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  • Khalida Mubeen,
  • Kashif Safeen,
  • Khalid M. Alotaibi,
  • Akif Safeen,
  • Ghafar Ali,
  • Abid Zaman,
  • Sufaid Shah,
  • Jawad Ahmad,
  • Attaullah Shah,
  • Rajwali Khan

摘要

The swift recombination of photoinduced charge carriers remains a persistent challenge in photocatalysis. To address this problem, a co-precipitation route is employed to fabricate a highly efficient heterojunction-based photocatalyst consisting of Zinc oxide (ZnO) with varying percentages (10, 30, and 50%) of copper sulfide (CuS) incorporated into the host material. The achievement of composite configurations is confirmed through the characterization of the prepared nanostructures using X-ray diffraction, field emission scanning electron microscopy coupled with energy-dispersive spectroscopy, diffuse reflectance absorption spectroscopy, and photoluminescence spectroscopy. The synthesized ZnO/CuS nanostructures exhibit remarkable photocatalytic performance under visible light illumination in methylene blue (MB) dye degradation. The optimal sample (ZnO-10% CuS) showed a maximum MB degradation of 99.5% in 15 min compared to bare ZnO, which degraded 95%, and CuS nanostructure (97% degradation) in 90 min. This study revealed that ZnO nanostructures exhibit significant separation of photoinduced charge carriers and notable augmentation of light absorption abilities through the implementation of CuS. Moreover, this investigation offers valuable insights into the mechanism of charge transfer and photocatalysis exhibited by the ZnO/CuS nanostructures. The findings of this study have broader environmental and industrial relevance, as the efficient photocatalytic degradation of methylene blue highlights the potential of ZnO/CuS nanostructures for sustainable wastewater treatment and pollution control applications.