Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 818, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.152883
Keywords
Co-3(PO4)(2); Ag3PO4; Ag nanoparticles; Heterostructure; Z-Scheme
Categories
Funding
- National Natural Science Foundation of China of China [21906072, 51873083]
- Natural Science Foundation of Jiangsu Province [BK20190982]
- Opening Project of State Key Laboratory of Polymer Materials Engineering (Sichuan University) [sklpme 2018-4-27]
- Six Talent Peaks Project in Jiangsu Province [2015-XCL-028]
- Doctoral Scientific Research Foundation of Jiangsu University of Science and Technology (China) [1062931806, 1142931803]
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Constructing Z-scheme photocatalyst is paramount to improve the photocatalytic activity of single semiconductor materials by the efficient separation of photo-generated carriers. Herein, a novel Zscheme photocatalyst Ag3PO4/Co-3(PO4)(2)@Ag was successfully synthesized, which has the distinctive three dimensional (3D) structure with the Ag3PO4 rhombic dodecahedrons on the flower-like Co-3(PO4)(2). The ternary Ag3PO4/Co-3(PO4)(2)@Ag heterostructure photocatalyst exhibits the highest photocatalytic activity in comparison with Ag3PO4, Co-3(PO4)(2) and Ag3PO4/Co-3(PO4)(2), which can be up to 91.2% at 60 min for the degradation of tetracycline (TC) under visible light irradiation. This enhanced photocatalytic performance is attributed to the surface plasmon resonance (SPR) of Ag to effectively broaden the absorption of visible light in composites, which is proved by the finite-difference time domain (FDTD) simulation. Moreover, the results of electron spin resonance (ESR) confirmed that the introduction of Ag nanoparticles can further facilitate the charge transfer of heterostructure Ag3PO4/Co-3(PO4)(2) through the route of the Z-scheme, fully retaining prominent redox ability of Ag3PO4 and Co-3(PO4)(2). Finally, the possible photocatalytic degradation mechanism over Ag3PO4/Co-3(PO4)(2)@Ag was proposed and discussed in detail. (C) 2019 Elsevier B.V. All rights reserved.
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