期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 31, 页码 27686-27696出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b05074
关键词
Bi5FeTi3O15; ultrathin g-C3N4; bridged Ag nanoparticles; Z-scheme; DFT study
资金
- National Basic Research Program of China (973 Program) [2013CB632402]
- National Natural Science Foundation of China (NSFC) [51472194]
- Fundamental Research Funds for the Central Universities [2019-YB-026]
Heterojunction photocatalysts have attracted widespread interest in photocatalysis because of their high-efficiency interfacial charge-transfer characteristics of nanoarchitectures. In this study, Ag-bridged 2D/2D Bi5FeTi3O15/ultrathin g-C(3)N(4 )Z-scheme heterojunction photocatalysts with powerful interfacial charge transfer has been synthesized via a facile ultrasound method coupled with a photoreduction strategy for efficient photocatalytic degradation of antibiotics. The morphology analysis displays that the bridged Ag nanoparticles were anchored on the interface of layered Bi5FeTi3O15 and ultrathin g-C3N4 nanosheets. Owing to its unique 2D/2D ternary heterostructure, the Bi5FeTi3O15/2%Ag/10% ultrathin g-C3N4 composite exhibited the best tetracycline degradation performance under visible-light and simulated solar irradiation. Meanwhile, the intermediates and degradation pathways were proposed by a liquid-phase mass spectrometry system. Characterizations and density functional theory studies together verify that the matched band structure of Bi5FeTi3O15 and g-C3N4 could induce a superfast Z-scheme interfacial charge-transfer path. More importantly, bridged Ag nanoparticles in the 2D/2D heterojunction extended the light absorption range and prolonged the lifetime of photogenerated electron-holes induced by Bi5FeTi3O15. This work affords a promising approach for designing multicomponent Z-scheme heterojunction photocatalysts for highly efficient photocatalytic application.
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