Scholarlink

<p>The development of highly efficient photocatalysts for&#xa0;the simultaneous degradation of emerging contaminants (ECs) and clean energy&#xa0;production represents an ideal approach for addressing the dual challenges of environmental pollution and&#xa0;the energy crisis. Herein, a zinc (Zn) single-atom catalyst with asymmetrically coordinated Zn–N<sub>2</sub>O<sub>2</sub> sites in graphitic carbon nitride (Zn<sub>SA</sub>-CN) is reported for the simultaneous photocatalytic degradation of ECs and production of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) via oxygen (O<sub>2</sub>) reduction. Experimental and characterization results showed that the asymmetric Zn–N<sub>2</sub>O<sub>2</sub> coordination induced charge polarization at the surface of graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>). The non-uniform charge distribution of Zn single atoms on g-C<sub>3</sub>N<sub>4</sub> improved the&#xa0;adsorption of pollutants and expanded the&#xa0;light absorption range. Moreover, the adsorbed pollutants further amplified charge polarization and light absorption via molecular modification. The synergistic interaction between the modified pollutants and visible light accelerated the&#xa0;direct electron transfer from ciprofloxacin (CIP) to O<sub>2</sub> for H<sub>2</sub>O<sub>2</sub> production, mitigating the overall energy demand of the water treatment process. This study elucidates the synergistic effect between the molecular modification of pollutants and light energy absorption induced by asymmetric coordination structures, offering new insights into energy conversion coupled to&#xa0;wastewater recycling.</p> Graphical Abstract <p></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

Direct charge transfer mediated by asymmetrically coordinated Zn–N2O2 sites in graphitic carbon nitride toward water purification with hydrogen peroxide photosynthesis

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月31日

查看全文
  • Yaru Li,
  • Yibing Zhong,
  • Peng Zhang,
  • Xin Zhang,
  • Zhiguo Cao,
  • Yumeng Wang,
  • Fan Li,
  • Chun Hu

摘要

The development of highly efficient photocatalysts for the simultaneous degradation of emerging contaminants (ECs) and clean energy production represents an ideal approach for addressing the dual challenges of environmental pollution and the energy crisis. Herein, a zinc (Zn) single-atom catalyst with asymmetrically coordinated Zn–N2O2 sites in graphitic carbon nitride (ZnSA-CN) is reported for the simultaneous photocatalytic degradation of ECs and production of hydrogen peroxide (H2O2) via oxygen (O2) reduction. Experimental and characterization results showed that the asymmetric Zn–N2O2 coordination induced charge polarization at the surface of graphitic carbon nitride (g-C3N4). The non-uniform charge distribution of Zn single atoms on g-C3N4 improved the adsorption of pollutants and expanded the light absorption range. Moreover, the adsorbed pollutants further amplified charge polarization and light absorption via molecular modification. The synergistic interaction between the modified pollutants and visible light accelerated the direct electron transfer from ciprofloxacin (CIP) to O2 for H2O2 production, mitigating the overall energy demand of the water treatment process. This study elucidates the synergistic effect between the molecular modification of pollutants and light energy absorption induced by asymmetric coordination structures, offering new insights into energy conversion coupled to wastewater recycling.

Graphical Abstract