Effective promotion of spacial charge separation in direct Z-scheme WO3/CdS/WS2 tandem heterojunction with enhanced visible-light-driven photocatalytic H2 evolution

Chao Xue; Peng Zhang; Guosheng Shao; Guidong Yang

doi:10.1016/j.cej.2020.125602

Effective promotion of spacial charge separation in direct Z-scheme WO₃/CdS/WS₂ tandem heterojunction with enhanced visible-light-driven photocatalytic H₂ evolution

Chao Xue
, Peng Zhang
, Guosheng Shao
, Guidong Yang

化学工程与技术学院

Zhengzhou University

科研成果: 期刊稿件 › 文章 › 同行评审

89 引用（Scopus）

摘要

Efficient charge separation and high photo-stability are crucial for sustainable solar-to-hydrogen energy conversion over photocatalysts. Here we describe a facile synthetic strategy to construct the novel direct Z-scheme tandem heterojunction consisting of the zero-dimensional (0D) ultrafine cadmium sulfide (CdS) nanograins and the two-dimensional (2D) ultrathin tungsten trioxide/tungsten disulfide (WO₃/WS₂) nanoplate matrixes. The WS₂ co-catalyst combined with the direct Z-scheme electron transfer channels in WO₃/CdS interfacial junctions facilitate the spatial separation and directional migration of photo-excited charge carriers. This smart design enables the optimized Z-scheme WO₃/CdS/WS₂ hybrid exhibit a high photocatalytic H₂ evolution activity of 14.34 mmoL·h⁻¹·g⁻¹ and an outstanding apparent quantum efficiency of 22.96% at 435 nm.

源语言	英语
文章编号	125602
期刊	Chemical Engineering Journal
卷	398
DOI	https://doi.org/10.1016/j.cej.2020.125602
出版状态	已出版 - 15 10月 2020

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10.1016/j.cej.2020.125602

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@article{668833352d52496dbf589496d218115c,

title = "Effective promotion of spacial charge separation in direct Z-scheme WO3/CdS/WS2 tandem heterojunction with enhanced visible-light-driven photocatalytic H2 evolution",

abstract = "Efficient charge separation and high photo-stability are crucial for sustainable solar-to-hydrogen energy conversion over photocatalysts. Here we describe a facile synthetic strategy to construct the novel direct Z-scheme tandem heterojunction consisting of the zero-dimensional (0D) ultrafine cadmium sulfide (CdS) nanograins and the two-dimensional (2D) ultrathin tungsten trioxide/tungsten disulfide (WO3/WS2) nanoplate matrixes. The WS2 co-catalyst combined with the direct Z-scheme electron transfer channels in WO3/CdS interfacial junctions facilitate the spatial separation and directional migration of photo-excited charge carriers. This smart design enables the optimized Z-scheme WO3/CdS/WS2 hybrid exhibit a high photocatalytic H2 evolution activity of 14.34 mmoL·h−1·g−1 and an outstanding apparent quantum efficiency of 22.96\% at 435 nm.",

keywords = "Heterojunction, Hydrogen evolution, Photocatalysts, WO/CdS/WS composite, Z-scheme",

author = "Chao Xue and Peng Zhang and Guosheng Shao and Guidong Yang",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = oct,

day = "15",

doi = "10.1016/j.cej.2020.125602",

language = "英语",

volume = "398",

journal = "Chemical Engineering Journal",

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T1 - Effective promotion of spacial charge separation in direct Z-scheme WO3/CdS/WS2 tandem heterojunction with enhanced visible-light-driven photocatalytic H2 evolution

AU - Xue, Chao

AU - Zhang, Peng

AU - Shao, Guosheng

AU - Yang, Guidong

PY - 2020/10/15

Y1 - 2020/10/15

N2 - Efficient charge separation and high photo-stability are crucial for sustainable solar-to-hydrogen energy conversion over photocatalysts. Here we describe a facile synthetic strategy to construct the novel direct Z-scheme tandem heterojunction consisting of the zero-dimensional (0D) ultrafine cadmium sulfide (CdS) nanograins and the two-dimensional (2D) ultrathin tungsten trioxide/tungsten disulfide (WO3/WS2) nanoplate matrixes. The WS2 co-catalyst combined with the direct Z-scheme electron transfer channels in WO3/CdS interfacial junctions facilitate the spatial separation and directional migration of photo-excited charge carriers. This smart design enables the optimized Z-scheme WO3/CdS/WS2 hybrid exhibit a high photocatalytic H2 evolution activity of 14.34 mmoL·h−1·g−1 and an outstanding apparent quantum efficiency of 22.96% at 435 nm.

AB - Efficient charge separation and high photo-stability are crucial for sustainable solar-to-hydrogen energy conversion over photocatalysts. Here we describe a facile synthetic strategy to construct the novel direct Z-scheme tandem heterojunction consisting of the zero-dimensional (0D) ultrafine cadmium sulfide (CdS) nanograins and the two-dimensional (2D) ultrathin tungsten trioxide/tungsten disulfide (WO3/WS2) nanoplate matrixes. The WS2 co-catalyst combined with the direct Z-scheme electron transfer channels in WO3/CdS interfacial junctions facilitate the spatial separation and directional migration of photo-excited charge carriers. This smart design enables the optimized Z-scheme WO3/CdS/WS2 hybrid exhibit a high photocatalytic H2 evolution activity of 14.34 mmoL·h−1·g−1 and an outstanding apparent quantum efficiency of 22.96% at 435 nm.

KW - Heterojunction

KW - Hydrogen evolution

KW - Photocatalysts

KW - WO/CdS/WS composite

KW - Z-scheme

UR - https://www.scopus.com/pages/publications/85085758269

U2 - 10.1016/j.cej.2020.125602

DO - 10.1016/j.cej.2020.125602

M3 - 文章

AN - SCOPUS:85085758269

SN - 1385-8947

VL - 398

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

M1 - 125602

ER -

Effective promotion of spacial charge separation in direct Z-scheme WO3/CdS/WS2 tandem heterojunction with enhanced visible-light-driven photocatalytic H2 evolution

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Effective promotion of spacial charge separation in direct Z-scheme WO₃/CdS/WS₂ tandem heterojunction with enhanced visible-light-driven photocatalytic H₂ evolution