Scholarlink

<p>In this study, a sustainable ternary nanocomposite photocatalyst, water hyacinth-derived porous activated carbon/ZnO/g-C₃N₄ (WHR-PAC/ZnO/g-C₃N₄), was successfully fabricated for the efficient degradation of methylene blue (MB) and rhodamine B (RhB) dyes under visible light irradiation. The prepared composite was characterized using various physicochemical techniques to investigate its structural, morphological, optical, and surface properties. The results confirmed the successful integration of ZnO and g-C₃N₄ onto the WHR-PAC surface, leading to enhanced surface area and improved charge separation efficiency. The photocatalytic activity of the synthesized nanocomposite was evaluated under different experimental conditions, including catalyst dosage, pH, dye concentration, and irradiation time. The WHR-PAC/ZnO/g-C₃N₄ composite achieved maximum degradation efficiencies of 97.8 ± 2.9% for MB within 75&#xa0;min and 95.4 ± 2.9% for RhB within 90&#xa0;min under visible light irradiation. Kinetic studies revealed that the degradation process followed pseudo-first-order kinetics. The enhanced photocatalytic performance was attributed to the synergistic interaction among WHR-PAC, ZnO, and g-C₃N₄, which promoted efficient charge transfer and suppressed electron–hole recombination. Furthermore, the photocatalyst exhibited excellent stability and reusability, maintaining high degradation efficiency after seven consecutive cycles. These findings demonstrate that the WHR-PAC/ZnO/g-C₃N₄ nanocomposite is a promising and environmentally friendly visible-light-driven photocatalyst for wastewater treatment applications.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Sustainable synthesis of water hyacinth–derived porous activated carbon/ZnO/g-C₃N₄ Ternary composite for visible-light photocatalytic degradation of methylene blue and rhodamine B

  • 期刊论文

  • 发表日期：

    2026年6月26日

查看全文
  • Amal A. Nassar,
  • Ayman K. El-Sawaf,
  • A. O. Ali,
  • M. F. Mubarak

摘要

In this study, a sustainable ternary nanocomposite photocatalyst, water hyacinth-derived porous activated carbon/ZnO/g-C₃N₄ (WHR-PAC/ZnO/g-C₃N₄), was successfully fabricated for the efficient degradation of methylene blue (MB) and rhodamine B (RhB) dyes under visible light irradiation. The prepared composite was characterized using various physicochemical techniques to investigate its structural, morphological, optical, and surface properties. The results confirmed the successful integration of ZnO and g-C₃N₄ onto the WHR-PAC surface, leading to enhanced surface area and improved charge separation efficiency. The photocatalytic activity of the synthesized nanocomposite was evaluated under different experimental conditions, including catalyst dosage, pH, dye concentration, and irradiation time. The WHR-PAC/ZnO/g-C₃N₄ composite achieved maximum degradation efficiencies of 97.8 ± 2.9% for MB within 75 min and 95.4 ± 2.9% for RhB within 90 min under visible light irradiation. Kinetic studies revealed that the degradation process followed pseudo-first-order kinetics. The enhanced photocatalytic performance was attributed to the synergistic interaction among WHR-PAC, ZnO, and g-C₃N₄, which promoted efficient charge transfer and suppressed electron–hole recombination. Furthermore, the photocatalyst exhibited excellent stability and reusability, maintaining high degradation efficiency after seven consecutive cycles. These findings demonstrate that the WHR-PAC/ZnO/g-C₃N₄ nanocomposite is a promising and environmentally friendly visible-light-driven photocatalyst for wastewater treatment applications.