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<p>Textile effluents containing pretreated dyes pose a significant environmental and health threat due to their high toxicity. To combat this, a series of composite NiFe-LDH@ZnO materials were synthesized using hydrothermal and co-precipitation methods, designed to degrade methylene blue (MB) under natural sunlight. By adjusting the ZnO content (0.25 to 1.25&#xa0;g) during co-precipitation, the material properties were optimized. Scanning electron microscopy (SEM) revealed non-uniform shapes and varied sizes, while X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) confirmed the presence of hexagonal phases for both NiFe-LDH and ZnO. Among the composites, the sample with 1.25&#xa0;g of ZnO (sample 4) exhibited an optical band gap of 2.40&#xa0;eV and achieved 98.5% efficiency in photocatalytic MB degradation, with excellent cycling stability. Key parameters, including catalyst dose, pH, and initial dye concentration, were analyzed, highlighting a synergistic effect between ZnO and NiFe-LDH that enhanced degradation efficiency. These findings underscore the potential of NiFe-LDH/ZnO composites for addressing wastewater challenges and broader applications, such as solar-driven hydrogen production.</p>

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Facile and Low Cost Synthesis of NiFe-LDH/ZnO Composites for Efficient Photodegradation of MB in Aqueous Solution Under the Illumination of Natural Sunlight

  • 期刊论文

  • 发表日期：

    2026年2月4日

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  • Ramsha Saleem,
  • Humera Shaikh,
  • Muhammad Saajan Barhaam,
  • Qurban Ali Shah,
  • Baradi Waryani,
  • Mazhar Ali Abbasi,
  • Imran Ali Halepoto,
  • Nek Muhammad Shaikh,
  • Muhammad Ali Bhatti,
  • Rafat M. Ibrahim,
  • Elmuez Dawi,
  • Aneela Tahira,
  • Matteo Tonezzer,
  • Zafar Hussain Ibupoto

摘要

Textile effluents containing pretreated dyes pose a significant environmental and health threat due to their high toxicity. To combat this, a series of composite NiFe-LDH@ZnO materials were synthesized using hydrothermal and co-precipitation methods, designed to degrade methylene blue (MB) under natural sunlight. By adjusting the ZnO content (0.25 to 1.25 g) during co-precipitation, the material properties were optimized. Scanning electron microscopy (SEM) revealed non-uniform shapes and varied sizes, while X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) confirmed the presence of hexagonal phases for both NiFe-LDH and ZnO. Among the composites, the sample with 1.25 g of ZnO (sample 4) exhibited an optical band gap of 2.40 eV and achieved 98.5% efficiency in photocatalytic MB degradation, with excellent cycling stability. Key parameters, including catalyst dose, pH, and initial dye concentration, were analyzed, highlighting a synergistic effect between ZnO and NiFe-LDH that enhanced degradation efficiency. These findings underscore the potential of NiFe-LDH/ZnO composites for addressing wastewater challenges and broader applications, such as solar-driven hydrogen production.