期刊
MOLECULAR CATALYSIS
卷 434, 期 -, 页码 69-79出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mcat.2017.03.004
关键词
Bi core; Porous g-C3N4; BiOCI shell; Z-scheme; Photocatalysis
Bi@BiOCl/g-C3N4 was prepared via a solvothermal method followed by a surface oxidation treatment. In this hybrid structure, Bi spheres were deposited on p-g-C3N4, and BiOCI was coated on the surface of Bi spheres except for the interfaces between g-C3N4 and metallic Bi. A series of characterization techniques proved its successful preparation. It exhibited high photocatalytic activities in RhB and 2,4-DCP degradation and Cr(VI) reduction under simulated solar light illumination. Besides, it exhibited efficient photo-mineralization of 2,4-DCP. Its efficient photocatalysis was attributed to its high separation efficiency of charge carriers and high redox potential of its photo-generated electrons and holes, which resulted from the Z-scheme photo-induced charges transfer in Bi@BiOCl/g-C3N4. Besides, the metallic Bi was served as Z-scheme bridge in Bi BiOCl/g-C3N4, which would accelerate the Z-scheme photo induced charges transfer. Meanwhile, its core-shell structure led to high stability during photocatalysis. Afterwards, its photocatalytic mechanisms for organic pollutants degradation and Cr(VI) reduction were illustrated. The Z-scheme core-shell structured photocatalyst in our work is a promising candidate for the degradation of organic pollutants and reduction of heavy metal ions. (C) 2017 Elsevier B.V. All rights reserved.
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