物理化学学报 >> 2024, Vol. 40 >> Issue (10): 2310013.doi: 10.3866/PKU.WHXB202310013

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一种新型等离子体共振效应调控的Ag/Ag3PO4/C3N5 S型异质结光催化材料高效降解左氧氟沙星抗生素

董珂欣1,†, 申楚琦1,†, 阎如玉1, 刘艳萍1, 庄春强2, 李世杰1,*()   

  1. 1 浙江海洋大学, 国家海洋设施养殖工程技术研究中心, 浙江省海产品健康危害因素关键技术研究重点实验室, 浙江 舟山 316022
    2 北京工业大学, 材料与制造学部, 固体微结构与性能北京市重点实验室, 北京 100124
  • 收稿日期:2023-10-16 修回日期:2023-11-15 录用日期:2023-11-15 发布日期:2024-03-13
  • 通讯作者: Email: lishijie@zjou.edu.cn (李世杰)
  • 作者简介:

    †These authors contributed equally to this work.

  • 基金资助:
    国家自然科学基金(U1809214); 浙江省自然科学基金(LY20E080014); 浙江省自然科学基金(LTGN23E080001); 舟山科技项目(2022C41011)

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)

摘要:

抗生素在自然水体中的含量不断升高,引发的水体污染对社会的可持续发展构成了巨大威胁。光催化技术是一种高效且环保的环境净化技术,在解决环境污染方面具有巨大的应用前景。C3N5是一种性能优越的非贵金属光催化剂。然而,该催化剂的应用面临着一些挑战,比如光反应动力学较慢和光生载流子快速复合的问题。近期的研究表明,构筑独特的S型异质结是获得优良光催化剂的一种有效策略。因此,通过一种简易的制备方法成功构筑了一种等离子体效应协同的Ag/Ag3PO4/C3N5 S型异质结光催化材料。由于等离子体效应和S型异质结的协同作用,Ag/Ag3PO4/C3N5异质结展现出优异的吸收太阳光的能力、高效分离光生载流子的能力以及强大的光氧化还原能力,能够在太阳光的激发下有效产生大量的•OH和•O2−自由基。因此,Ag/Ag3PO4/C3N5表现出卓越的光催化性能,对左氧氟沙星(LEV)的降解速率常数高达0.0362 min−1,比C3N5、Ag3PO4和Ag3PO4/C3N5分别提高了24.8、1.1和0.7倍。此外,Ag/Ag3PO4/C3N5异质结具有出色的抗外界环境干扰性和可重复使用性。该研究为C3N5基光催化剂材料在环境净化方面迈出了坚实的一步。

关键词: 离子体共振效应, C3N5, S型异质结, 协同效应, 抗生素去除, 内建电场

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