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<p>This study investigates the photocatalytic performance of a perlite@C<sub>3</sub>N<sub>4</sub> incorporated Chitosan nanocomposite for the efficient degradation of tetracycline (TC) under visible light irradiation. The nanocomposite was synthesized and characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), UV-Vis spectroscopy, and energy-dispersive X-ray spectroscopy (EDS) to evaluate its structural, morphological, optical, and elemental features. The photocatalytic experiments demonstrated that the perlite@C<sub>3</sub>N<sub>4</sub> incorporated Chitosan nanocomposite achieved approximately 90% tetracycline removal within 120&#xa0;min using only 0.01&#xa0;g of catalyst, indicating high photocatalytic efficiency at low catalyst dosage. The optimal pH for the degradation process was found to be around 10, where the photocatalytic activity was significantly enhanced compared to more acidic or highly alkaline conditions. It is suggested that at pH 10, the favorable surface charge and the enhanced generation of hydroxyl radicals synergistically contribute to the effective degradation process. The influence of initial tetracycline concentration was also examined, revealing that higher pollutant concentrations led to a decrease in photocatalytic efficiency due to competitive adsorption on the catalyst surface. Scavenger studies confirmed that reactive oxygen species, particularly hydroxyl radicals, played a critical role in the degradation mechanism. This work highlights the potential of the synthesized perlite@C<sub>3</sub>N<sub>4</sub> incorporated Chitosan nanocomposite as a cost-effective and environmentally friendly photocatalyst for the treatment of pharmaceutical contaminants in wastewater.</p>

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Enhanced tetracycline degradation via Perlite@C₃N₄/chitosan nanocomposites: a synergistic photocatalytic approach

  • 期刊论文

  • 发表日期：

    2026年6月23日

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  • Roya Mohammadzadeh kakhki,
  • Elham Naghavi Moghaddam

摘要

This study investigates the photocatalytic performance of a perlite@C3N4 incorporated Chitosan nanocomposite for the efficient degradation of tetracycline (TC) under visible light irradiation. The nanocomposite was synthesized and characterized using Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), UV-Vis spectroscopy, and energy-dispersive X-ray spectroscopy (EDS) to evaluate its structural, morphological, optical, and elemental features. The photocatalytic experiments demonstrated that the perlite@C3N4 incorporated Chitosan nanocomposite achieved approximately 90% tetracycline removal within 120 min using only 0.01 g of catalyst, indicating high photocatalytic efficiency at low catalyst dosage. The optimal pH for the degradation process was found to be around 10, where the photocatalytic activity was significantly enhanced compared to more acidic or highly alkaline conditions. It is suggested that at pH 10, the favorable surface charge and the enhanced generation of hydroxyl radicals synergistically contribute to the effective degradation process. The influence of initial tetracycline concentration was also examined, revealing that higher pollutant concentrations led to a decrease in photocatalytic efficiency due to competitive adsorption on the catalyst surface. Scavenger studies confirmed that reactive oxygen species, particularly hydroxyl radicals, played a critical role in the degradation mechanism. This work highlights the potential of the synthesized perlite@C3N4 incorporated Chitosan nanocomposite as a cost-effective and environmentally friendly photocatalyst for the treatment of pharmaceutical contaminants in wastewater.