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<p>Industrial dye effluents from various manufacturing sectors pose serious environmental concerns because of their toxicity, persistence, and resistance to conventional treatment methods. Present study investigates the synthesis and photocatalytic performance of environmentally benign graphene-based nanocomposites for the degradation of crystal violet (CV) dye under ultraviolet (UV) irradiation. Two photocatalysts, reduced graphene oxide (rGO) and modified rGO incorporating Cu and ZnO, were synthesized to enhance light absorption, charge separation, and photocatalytic efficiency. The synthesized materials were characterized using x-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDAX), transmission electron microscopy (TEM), and UV–Vis spectroscopy to evaluate their structural, morphological, and optical properties. Photocatalytic activity was assessed for CV dye solutions of known concentration and industrial effluent samples using a fixed catalyst dose under UV irradiation. The modified rGO nanocomposite exhibited significantly enhanced photocatalytic activity compared with pure rGO, attributed to improved charge-carrier separation, higher surface area, and enhanced light-harvesting capability. Reusability studies demonstrated that the optimized composite retained 65% efficiency after four cycles. These findings suggest that modified rGO nanocomposites are promising and cost-effective photocatalysts for sustainable wastewater treatment.</p>

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Synergistic Effects of Reduced Graphene Oxide Composites in UV Driven Photocatalytic Degradation of Crystal Violet

  • 期刊论文

  • 发表日期：

    2026年6月26日

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  • Palak A. Trivedi,
  • Jitendra B. Naik,
  • Pritam B. Patil

摘要

Industrial dye effluents from various manufacturing sectors pose serious environmental concerns because of their toxicity, persistence, and resistance to conventional treatment methods. Present study investigates the synthesis and photocatalytic performance of environmentally benign graphene-based nanocomposites for the degradation of crystal violet (CV) dye under ultraviolet (UV) irradiation. Two photocatalysts, reduced graphene oxide (rGO) and modified rGO incorporating Cu and ZnO, were synthesized to enhance light absorption, charge separation, and photocatalytic efficiency. The synthesized materials were characterized using x-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDAX), transmission electron microscopy (TEM), and UV–Vis spectroscopy to evaluate their structural, morphological, and optical properties. Photocatalytic activity was assessed for CV dye solutions of known concentration and industrial effluent samples using a fixed catalyst dose under UV irradiation. The modified rGO nanocomposite exhibited significantly enhanced photocatalytic activity compared with pure rGO, attributed to improved charge-carrier separation, higher surface area, and enhanced light-harvesting capability. Reusability studies demonstrated that the optimized composite retained 65% efficiency after four cycles. These findings suggest that modified rGO nanocomposites are promising and cost-effective photocatalysts for sustainable wastewater treatment.