Scholarlink

<p>Photocatalytic technology is a clean, efficient and environmentally friendly method, widely applied in the photocatalytic degradation of pollutants. Traditional photocatalysts, such as TiO₂ and ZnO, are wide-bandgap semiconductor materials that can only absorb less than 5% of the ultraviolet light in sunlight, limiting their ability to fully utilize visible light. Graphitic carbon nitride (g-C₃N₄) is a visible-light-responsive non-metallic polymer semiconductor photocatalytic material, known for its excellent chemical and thermal stability. However, conventional calcined g-C₃N₄ is limited in its catalytic activity due to drawbacks such as low specific surface area, weak visible light absorption and the rapid recombination of photo-induced electrons and holes. In this work, melamine was utilized as the precursor, with N-acryloyl glycine amide (NAGA) serving as the nitrogen source for doping, followed by the loading of Ag NPs. The Ag/N-g-C₃N₄-x composite photocatalyst was synthesized using a one-pot method. In comparison to conventional g-C₃N₄, Ag/N-g-C₃N₄-x demonstrates an enhanced specific surface area, broadened visible light absorption and a reduced band gap. Furthermore, the localized surface plasmon resonance (LSPR) effect of Ag NPs enhances carrier mobility and mitigates the recombination of photo-induced electrons and holes. In the photocatalytic degradation experiments of methylene blue and amaranth, Ag/N-g-C₃N₄-3 exhibited superior catalytic performance, achieving degradation efficiencies of 67.9% for methylene blue and 99.7% for amaranth within 30&#xa0;min. With respect to traditional g-C₃N₄, the composite photocatalyst increased the degradation reaction rates of methylene blue and amaranth by 2.9 times and 14 times, respectively. A novel strategy for efficient solar energy utilization is demonstrated in this work through the synthesis of high-performance photocatalysts via NAGA doping.</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

Boosting Photocatalytic Activity of g-C3N4 Through Dual Modification: N-Doping and Ag NPs Synergy for Rapid Azo Dye Degradation with Mechanistic Insights

  • 期刊论文

  • 发表日期：

    2025年7月8日

查看全文
  • Shiyu Wang,
  • Zirong Zheng,
  • Yang Zhao,
  • Huan Wang

摘要

Photocatalytic technology is a clean, efficient and environmentally friendly method, widely applied in the photocatalytic degradation of pollutants. Traditional photocatalysts, such as TiO₂ and ZnO, are wide-bandgap semiconductor materials that can only absorb less than 5% of the ultraviolet light in sunlight, limiting their ability to fully utilize visible light. Graphitic carbon nitride (g-C₃N₄) is a visible-light-responsive non-metallic polymer semiconductor photocatalytic material, known for its excellent chemical and thermal stability. However, conventional calcined g-C₃N₄ is limited in its catalytic activity due to drawbacks such as low specific surface area, weak visible light absorption and the rapid recombination of photo-induced electrons and holes. In this work, melamine was utilized as the precursor, with N-acryloyl glycine amide (NAGA) serving as the nitrogen source for doping, followed by the loading of Ag NPs. The Ag/N-g-C₃N₄-x composite photocatalyst was synthesized using a one-pot method. In comparison to conventional g-C₃N₄, Ag/N-g-C₃N₄-x demonstrates an enhanced specific surface area, broadened visible light absorption and a reduced band gap. Furthermore, the localized surface plasmon resonance (LSPR) effect of Ag NPs enhances carrier mobility and mitigates the recombination of photo-induced electrons and holes. In the photocatalytic degradation experiments of methylene blue and amaranth, Ag/N-g-C₃N₄-3 exhibited superior catalytic performance, achieving degradation efficiencies of 67.9% for methylene blue and 99.7% for amaranth within 30 min. With respect to traditional g-C₃N₄, the composite photocatalyst increased the degradation reaction rates of methylene blue and amaranth by 2.9 times and 14 times, respectively. A novel strategy for efficient solar energy utilization is demonstrated in this work through the synthesis of high-performance photocatalysts via NAGA doping.