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<p>High-concentration single-atom doping remains a formidable challenge due to the propensity for single atoms to form clusters or aggregate at elevated concentrations. Herein, high-concentration (10.8 wt%) Zn single-atom-doped porous tubular g-C<sub>3</sub>N<sub>4</sub> (ZCN) was successfully obtained via a template-free, one-step calcination method, exhibiting excellent photocatalytic performance. The confinement of the pore walls suppresses the Zn atom’s migration and aggregation, enhancing the Zn single-atom stability. ZCN exhibited excellent photodegradation performance against tetracycline with outstanding stability. Moreover, ZCN displayed remarkable sterilization performance, achieving a 100% inactivation of <i>Staphylococcus aureus</i> within 90&#xa0;min of visible-light exposure. Density functional theory calculations demonstrated that the Zn single-atom sites act as pivotal photocatalytic active sites, with the presence of Zn single atoms notably augmenting charge separation efficiency. This work provides a novel approach for managing photocatalytic efficiency through enlarging single-atom doping, offering an avenue for pollutant photodegradation and sterilization.</p> Graphical abstract <p></p>

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High-concentration single-atom Zn-doped porous tubular g-C3N4: a superior photocatalyst for tetracycline hydrochloride degradation and bacterial sterilization

  • 期刊论文

  • 发表日期：

    2025年3月24日

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  • Chunyan Li,
  • Yuxing Cai,
  • Jianhao Wu,
  • Lan Li,
  • Sa-Sa Xia,
  • Xiaozhuo Wang,
  • Rongrong Jia,
  • Zhi Chen,
  • Cheng-Chao Jin,
  • Wen Wang,
  • Rongyan Wang,
  • Nan Zhang

摘要

High-concentration single-atom doping remains a formidable challenge due to the propensity for single atoms to form clusters or aggregate at elevated concentrations. Herein, high-concentration (10.8 wt%) Zn single-atom-doped porous tubular g-C3N4 (ZCN) was successfully obtained via a template-free, one-step calcination method, exhibiting excellent photocatalytic performance. The confinement of the pore walls suppresses the Zn atom’s migration and aggregation, enhancing the Zn single-atom stability. ZCN exhibited excellent photodegradation performance against tetracycline with outstanding stability. Moreover, ZCN displayed remarkable sterilization performance, achieving a 100% inactivation of Staphylococcus aureus within 90 min of visible-light exposure. Density functional theory calculations demonstrated that the Zn single-atom sites act as pivotal photocatalytic active sites, with the presence of Zn single atoms notably augmenting charge separation efficiency. This work provides a novel approach for managing photocatalytic efficiency through enlarging single-atom doping, offering an avenue for pollutant photodegradation and sterilization.

Graphical abstract