期刊
CHEMICAL ENGINEERING JOURNAL
卷 382, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.122960
关键词
Co-3(PO4)(2)/g-C3N4; Heterojunction; Photocatalysis; Visible light; Overall water splitting
资金
- National Natural Science Foundations 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]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX17_1831, SJCX18_0759]
- Doctoral Scientific Research Foundation of Jiangsu University of Science and Technology (China) [1062931806, 1142931803]
The photocatalytic overall water splitting is an ideal pathway to generate hydrogen gas for sustainable energy production. Herein, the 2D/2D Co-3(PO4)(2)/g-C3N4 heterojunctions were successfully synthesized for overall water splitting from pure water by a simple direct precipitation route under the effect of coulomb electrostatic interaction. The introduction of Co-3(PO4)(2) nanosheets broadens the light absorption range of Co-3(PO4)(2)/g-C3N4 heterojunction, and in addition, the unusual 2D/2D heterostructure can provide more contact areas to promote the interfacial charge transfer between g-C3N4 nanosheets and Co-3(PO4)(2) nanosheets, which considerably enhances the photogenerated charge separation. Among the Co-3(PO4)(2)/g-C3N4 heterojunctions, 35% Co-3(PO4)(2)/gC(3)N(4) exhibits the optimal H-2 and O-2 evolution rates which are 375.6 and 177.4 mu mol g(-1) h(-1), respectively. Moreover, the apparent quantum efficiency of the 35% Co-3(PO4)(2)/g-C3N4 reaches up to 1.32% at 420 nm. Furthermore, the 2D/2D Co-3(PO4)(2)/g-C3N4 composite possesses the prominent stability and recyclability, testifying a potential application for the conversion of the sustainable energy.
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