一种新型等离子体共振效应调控的Ag/Ag_(3)PO_(4)/C_(3)N_(5)S型异质结光催化材料高效降解左氧氟沙星抗生素  

Integration of Plasmonic Effect and S-Scheme Heterojunction into Ag/Ag_(3)PO_(4)/C_(3)N_(5) Photocatalyst for Boosted Photocatalytic Levofloxacin Degradation

作　　者：董珂欣 申楚琦 阎如玉 刘艳萍 庄春强[2] 李世杰 Kexin Dong;Chuqi Shen;Ruyu Yan;Yanping Liu;Chunqiang Zhuang;Shijie Li(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;Institute of Microstructure and Property of Advanced Materials,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China)

机构地区：[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

出　　处：《物理化学学报》2024年第10期43-47,共5页Acta Physico-Chimica Sinica

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

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。C_(3)N_(5)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/Ag_(3)PO_(4)/C_(3)N_(5)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/Ag_(3)PO_(4)/C_(3)N_(5)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·O_(2)^(-)自由基。因此,Ag/Ag_(3)PO_(4)/C_(3)N_(5)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0.0362min^(-1),比C_(3)N_(5)、Ag_(3)PO_(4)和Ag_(3)PO_(4)/C_(3)N_(5)分别提高了24.8、1.1和0.7倍。此外,Ag/Ag_(3)PO_(4)/C_(3)N_(5)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C_(3)N_(5)基光催化剂材料在环境净化方面迈出了坚实的一步。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.C_(3)N_(5),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 Sscheme photosystem proves to be a reliable strategy for obtaining outstanding photocatalysts.In this context,a plasmonic S-scheme photosystem involving Ag/Ag_(3)PO_(4)/C_(3)N_(5) was developed through a feasible route.The compactly connected 0D/0D/2D Ag/Ag_(3)PO_(4)/C_(3)N_(5) 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·O_(2)^(-)effectively.Ag/Ag_(3)PO_(4)/C_(3)N_(5) 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 C_(3)N_(5),Ag_(3)PO_(4),and Ag_(3)PO_(4)/C_(3)N_(5),respectively.Impressively,Ag/Ag_(3)PO_(4)/C_(3)N_(5) delivers remarkable anti-interference performance and reusability.This achievement signifies a significant step toward developing potent C_(3)N_(5)-involved photosystems for environmental purification.

关 键 词：离子体共振效应 C_(3)N_(5) S型异质结 协同效应 抗生素去除 内建电场 

分 类 号：O643[理学—物理化学]