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<p>Organic dye pollutants, particularly from textile industries, pose significant environmental and health hazards due to their toxic and non-biodegradable nature. Traditional wastewater treatment methods are often ineffective against these complex compounds. Photocatalytic degradation has emerged as a crucial and eco-friendly approach for mitigating water pollution. Therefore, the present work reports the synthesis of Nickel (Ni)-doped Zinc Oxide (ZnO) nanoparticles via the coprecipitation method. The structural, morphological, and optical properties of the synthesized nanoparticles were thoroughly characterized using various techniques. Their photocatalytic efficiency was evaluated through the degradation of Indigo Carmine (IC) dye under visible light. Among the samples, ZNi-2 (2&#xa0;mol% Ni-doped ZnO) exhibited outstanding performance, achieving 91.67% degradation within 150&#xa0;min. This enhanced activity is attributed to enhanced light absorption and charge separation due to Ni doping. Furthermore, the photocatalyst showed excellent reusability and stability across multiple cycles. A plausible degradation mechanism involving reactive species is also proposed.</p> Graphical abstract <p></p>

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Enhanced photocatalytic activity of Ni doped ZnO nanoparticles for Indigo Carmine dye degradation

  • 期刊论文

  • 发表日期：

    2025年8月8日

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  • Rahul Kumar,
  • R. S. Gedam

摘要

Organic dye pollutants, particularly from textile industries, pose significant environmental and health hazards due to their toxic and non-biodegradable nature. Traditional wastewater treatment methods are often ineffective against these complex compounds. Photocatalytic degradation has emerged as a crucial and eco-friendly approach for mitigating water pollution. Therefore, the present work reports the synthesis of Nickel (Ni)-doped Zinc Oxide (ZnO) nanoparticles via the coprecipitation method. The structural, morphological, and optical properties of the synthesized nanoparticles were thoroughly characterized using various techniques. Their photocatalytic efficiency was evaluated through the degradation of Indigo Carmine (IC) dye under visible light. Among the samples, ZNi-2 (2 mol% Ni-doped ZnO) exhibited outstanding performance, achieving 91.67% degradation within 150 min. This enhanced activity is attributed to enhanced light absorption and charge separation due to Ni doping. Furthermore, the photocatalyst showed excellent reusability and stability across multiple cycles. A plausible degradation mechanism involving reactive species is also proposed.

Graphical abstract