物理化学学报 >> 2025, Vol. 41 >> Issue (5): 100050.doi: 10.1016/j.actphy.2025.100050

所属专题： 光催化中的S型异质结

论文 上一篇    

自旋极化增强ZnFe1.2Co0.8O4/BiVO4 S型异质结光催化性能降解四环素

吴金往1,†, 谢琦靖1,†, 张成亮2, 史海峰1,3,*()   

  1. 1 江南大学理学院, 江苏 无锡 214122
    2 杭州电子科技大学, 杭州 310018
    3 南京大学固体微结构国家实验室, 南京 210093
  • 收稿日期:2024-11-05 修回日期:2024-12-16 录用日期:2024-12-24 发布日期:2025-04-18
  • 通讯作者: Email: hfshi@jiangnan.edu.cn; Tel.: +86-15052262655 (史海峰)
  • 作者简介:

    †Contributed equally to this work.

  • 基金资助:
    国家自然科学基金(52271175); 南京大学固体微结构国家重点实验室开放课题(M34047); 江苏省青蓝工程项目

Rationally Designed ZnFe1.2Co0.8O4/BiVO4 S-Scheme Heterojunction with Spin-Polarization for the Elimination of Antibiotic

Jinwang Wu1, Qijing Xie1, Chengliang Zhang2, Haifeng Shi1,3,*()   

  1. 1 School of Science, Jiangnan University, Wuxi 214122, Jiangsu Province, China
    2 Hangzhou Dianzi University, Hangzhou 310018, China
    3 National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
  • Received:2024-11-05 Revised:2024-12-16 Accepted:2024-12-24 Published:2025-04-18
  • Contact: Email: hfshi@jiangnan.edu.cn; Tel.: +86-15052262655 (Haifeng Shi)
  • Supported by:
    the National Natural Science Foundation of China(52271175); National Laboratory of Solid State Microstructures, Nanjing University(M34047); Prof. Haifeng Shi was indebted to the financial support from the Qing Lan Project of Jiangsu Province

RichHTML

13

PDF

2304

赞

补充材料

1

摘要：

最近，电子自旋极化作为抑制光生电荷快速复合的一种策略受到了广泛的关注。然而，自旋极化调控主要关注于单个光催化材料，光生电荷分离的效率依然有待进一步提高。于此，本文构建了ZnFe1.2Co0.8O4(ZFCO)/BiVO4(BVO)异质结，通过S型异质结和自旋极化作用协同促进光生电荷分离，在外部磁场下进一步促进了光催化去除有机物污染物的性能。实验结果表明，在光照下，ZB-1.5 (ZFCO : BVO = 3 : 2)表现出最佳性能，四环素(TC)降解的反应速率常数(k)为0.0146 min−1。在光照和磁场条件下，ZB-1.5的TC降解反应速率常数(k)为0.0175 min−1，其光催化性能得到了进一步提升。研究表明这是由于电子自旋极化和S型电荷分离机制协同促进了光生电荷分离。DFT计算表明，ZFCO在费米能级附近出现了明显的自旋极化现象。光致发光光谱(PL)表明，S型异质结提高了电荷分离效率。此外，评估了可能的降解路径和毒性，表明成功实现了脱毒。这项工作为利用S型异质结开发具有高效光生电荷分离的光催化剂提供了一种研究思路。

关键词: 电子自旋极化, 铁磁光催化剂, S型异质结, 磁场

Abstract:

Recently, the regulation of electronic spin polarization has attracted considerable interest as an effective strategy to mitigate the rapid recombination of photo-generated charges. However, current research predominantly targets individual photocatalysts, where the efficiency of charge separation still has significant room for improvement. Herein, a ZnFe1.2Co0.8O4 (ZFCO) and BiVO4 (BVO) S-scheme heterojunction was developed, which synergistically promoted charge separation through the S-scheme heterojunction and spin polarization, and further enhanced the photocatalytic performance in removing organic pollutants under an external magnetic field. Experimental results revealed that under sole light irradiation, ZB-1.5 (ZFCO : BVO = 3 : 2) demonstrated optimal performance, with a reaction rate constant (k) for tetracycline (TC) degradation of 0.0146 min−1. Under light irradiation and magnetic field conditions, the reaction rate constant (k) of ZB-1.5 for TC degradation increased to 0.0175 min−1, indicating enhanced photocatalytic performance. DFT calculations indicated that ZFCO exhibited the spin polarization. Photoluminescence measurements demonstrated that the S-scheme heterojunction structure improved the charge separation efficiency. In addition, possible degradation pathways and toxicity were assessed, indicating successful detoxification. This work provides some useful insights into utilizing S-scheme heterojunctions to develop photocatalysts with efficient separation of photo-generated charges.

Key words: Electron spin-polarization, Ferromagnetic photocatalyst, S-scheme heterojunction, Magnetic field