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

文献类型： 外文期刊

第一作者： Li, Chunyan

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

作者机构：

关键词： Photocatalysis; Zn single atoms; Porous tubular g-C3N4; Degradation of pollutants; Sterilization

期刊名称：RARE METALS （ 影响因子：11.0； 五年影响因子：8.4 ）

ISSN： 1001-0521

年卷期： 2025 年 44 卷 7 期

页码：

收录情况： SCI

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.

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