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<p>This research focuses on the synthesis of NiO nanoparticles via a bio-fabrication method, where almond peel extract serves as both a stabilizing and capping agent. The effectiveness of these nanoparticles in the photocatalytic treatment of the organic pollutant was comprehensively evaluated, considering various influencing factors, including organic pollutant concentration, catalyst dosage, and pH. The structural, optical, morphological, and functional groups of the fabricated materials were examined by employing XRD, UV, SEM, and FTIR techniques. The fabricated nanoparticles exhibited an average crystallite size of 20.98&#xa0;nm. The degradation potential of the fabricated materials was found to be decreased with increasing the initial pollutant concentration, while it improved with a higher catalyst dosage and increasing the solution pH during the photocatalysis. NiO nanoparticles demonstrated the greatest photocatalytic removal of brilliant green and amoxicillin after 120&#xa0;min solar light exposure, reaching degradation efficiency of 79.13% and 43.05% for brilliant green and amoxicillin, respectively. The removal of amoxicillin follows pseudo-first-order kinetics with an R<sup>2</sup> value of 0.89882, while the breakdown of the brilliant green follows a first-order reaction with an R<sup>2</sup> value of 0.96426. This eco-friendly synthesis procedure reduces the environmental impact associated with the conventional chemical process by harnessing the renewable resources of almond peel, offering a sustainable combat against environmental degradation.</p>

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Solar light-assisted photocatalytic degradation of organic pollutants using sustainable bio-fabricated NiO nanoparticles from almond peel extract

  • 期刊论文

  • 发表日期：

    2025年10月29日

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  • Rinku Rana,
  • Waseem Ahmad,
  • Noha Al-Qasmi,
  • Mohammad Shariq

摘要

This research focuses on the synthesis of NiO nanoparticles via a bio-fabrication method, where almond peel extract serves as both a stabilizing and capping agent. The effectiveness of these nanoparticles in the photocatalytic treatment of the organic pollutant was comprehensively evaluated, considering various influencing factors, including organic pollutant concentration, catalyst dosage, and pH. The structural, optical, morphological, and functional groups of the fabricated materials were examined by employing XRD, UV, SEM, and FTIR techniques. The fabricated nanoparticles exhibited an average crystallite size of 20.98 nm. The degradation potential of the fabricated materials was found to be decreased with increasing the initial pollutant concentration, while it improved with a higher catalyst dosage and increasing the solution pH during the photocatalysis. NiO nanoparticles demonstrated the greatest photocatalytic removal of brilliant green and amoxicillin after 120 min solar light exposure, reaching degradation efficiency of 79.13% and 43.05% for brilliant green and amoxicillin, respectively. The removal of amoxicillin follows pseudo-first-order kinetics with an R2 value of 0.89882, while the breakdown of the brilliant green follows a first-order reaction with an R2 value of 0.96426. This eco-friendly synthesis procedure reduces the environmental impact associated with the conventional chemical process by harnessing the renewable resources of almond peel, offering a sustainable combat against environmental degradation.