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Construction of direct Z‐Scheme photocatalysts for overall water splitting using two‐dimensional van der waals heterojunctions of metal dichalcogenides
Author(s) -
Fu CenFeng,
Zhang Ruiqi,
Luo Qiquan,
Li Xingxing,
Yang Jinlong
Publication year - 2019
Publication title -
journal of computational chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.907
H-Index - 188
eISSN - 1096-987X
pISSN - 0192-8651
DOI - 10.1002/jcc.25540
Subject(s) - heterojunction , van der waals force , metal , water splitting , scheme (mathematics) , transition metal , photocatalysis , materials science , chemistry , nanotechnology , chemical physics , physics , condensed matter physics , quantum mechanics , mathematics , molecule , metallurgy , catalysis , mathematical analysis , biochemistry
The direct Z‐scheme system constructed by two‐dimensional (2D) materials is an efficient route for hydrogen production from photocatalytic water splitting. In the present work, the 2D van der Waals (vdW) heterojunctions of MoSe 2 /SnS 2 , MoSe 2 /SnSe 2 , MoSe 2 /CrS 2 , MoTe 2 /SnS 2 , MoTe 2 /SnSe 2 , and MoTe 2 /CrS 2 are proposed to be promising candidates for direct Z‐scheme photocatalysts and verified by first principles calculations. Perpendicular electric field is induced in these 2D vdW heterojunctions, which enhances the efficiency of solar energy utilization. Replacing MoSe 2 with MoTe 2 not only facilitates the interlayer carrier migration, but also improves the optical absorption properties for these heterojunctions. Excitingly, the 2D vdW MoTe 2 /CrS 2 heterojunction is demonstrated, for the first time, to be 2D near‐infrared‐light driven photocatalyst for direct Z‐scheme water splitting. © 2018 Wiley Periodicals, Inc.