Acta Phys. -Chim. Sin. ›› 2024, Vol. 40 ›› Issue (10): 2310013.doi: 10.3866/PKU.WHXB202310013

• ARTICLE • Previous Articles     Next Articles

Integration of Plasmonic Effect and S-Scheme Heterojunction into Ag/Ag3PO4/C3N5 Photocatalyst for Boosted Photocatalytic Levofloxacin Degradation

Kexin Dong1, Chuqi Shen1, Ruyu Yan1, Yanping Liu1, Chunqiang Zhuang2, Shijie Li1,*()   

  1. 1 Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province, National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, Zhejiang Province, China
    2 Institute of Microstructure and Property of Advanced Materials, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China
  • Received:2023-10-16 Revised:2023-11-15 Accepted:2023-11-15 Published:2024-03-13
  • Contact: Email: lishijie@zjou.edu.cn (Shijie Li)
  • Supported by:
    the National Natural Science Foundation of China(U1809214); Natural Science Foundation of Zhejiang Province of China(LY20E080014); Natural Science Foundation of Zhejiang Province of China(LTGN23E080001); Science and Technology Project of Zhoushan of China(2022C41011)

Abstract:

The escalating presence of pharmaceutical antibiotics in natural water poses an overwhelming threat to the sustainable development of society. Photocatalysis technology stands out as a promising and cutting-edge environmental purification alternative. C3N5, identified as a distinctive nonprecious nonmetal photocatalyst, holds potential for environmental protection. However, challenges persist originating from the sluggish photoreaction kinetics and severe photo-carrier reunion. Currently, the design of a special S-scheme photosystem proves to be a reliable strategy for obtaining outstanding photocatalysts. In this context, a plasmonic S-scheme photosystem involving Ag/Ag3PO4/C3N5 was developed through a feasible route. The compactly connected 0D/0D/2D Ag/Ag3PO4/C3N5 heterostructure, benefitting from the synergy between the plasmonic effect and the S-scheme junction, facilitates the efficient utilization of appreciably reinforced sunlight absorption, effective photo-carrier disassociation, and notable photoredox capacity. Consequently, this system generates •OH and •O2− effectively. Ag/Ag3PO4/C3N5 demonstrates a superb photocatalytic levofloxacin eradication rate of 0.0362 min−1, marking a substantial advancement of 24.8, 1.1, and 0.7 folds compared to C3N5, Ag3PO4, and Ag3PO4/C3N5, respectively. Impressively, Ag/Ag3PO4/C3N5 delivers remarkable anti-interference performance and reusability. This achievement signifies a significant step toward developing potent C3N5-involved photosystems for environmental purification.

Key words: Plasmonic effect, C3N5, S-scheme heterojunction, Synergistic effect, Antibiotic removal, Internal electric field