Promoted photocarriers separation by straining in 2D/2D van der Waals heterostructures for high-efficiency visible-light photocatalysis

被引：28

作者：

Wang, Yong ^{[1
]}

Zeng, Chengxin ^{[1
]}

Zhang, Yu ^{[2
]}

Su, Ran ^{[3
]}

Yang, Dingyi ^{[1
]}

Wang, Zhaokun ^{[4
,5
]}

Wu, Yizhang ^{[4
,5
]}

Pan, Hongzhe ^{[6
]}

Zhu, Weidong ^{[7
,8
]}

Hu, Wen ^{[1
]}

Liu, Hong ^{[9
,10
]}

Yang, Rusen ^{[1
]}

机构：

[1] Xidian Univ, Acad Adv Interdisciplinary Res, Sch Adv Mat & Nanotechnol, Xian 710126, Peoples R China

[2] Shaanxi Univ Sci & Technol, Dept Phys, Xian 710021, Peoples R China

[3] Hebei Univ Sci & Technol, Coll Sci, Shijiazhuang 050018, Hebei, Peoples R China

[4] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

[5] Nanjing Univ, Jiangsu Prov Key Lab Nano Technol, Nanjing 210093, Peoples R China

[6] Linyi Univ, Sch Phys & Elect Engn, Linyi 276005, Shandong, Peoples R China

[7] Xidian Univ, Sch Microelect, State Key Discipline Lab Wide Band Gap Semicond T, Xian 710071, Peoples R China

[8] Xidian Univ, Sch Microelect, Shaanxi Joint Key Lab Graphene, Xian 710071, Peoples R China

[9] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[10] Univ Jinan, Collaborat Innovat Ctr Technol & Equipment Biol D, Inst Adv Interdisciplinary Res iAIR, Jinan 250022, Shandong, Peoples R China

来源：

MATERIALS TODAY PHYSICS | 2022年 / 22卷

基金：

中国国家自然科学基金;

关键词：

van der waals heterostructures; DFT calculations; Strain; Visible-light photocatalysis; CARBON NITRIDE NANOSHEETS; WATER; DRIVEN; MOS2;

D O I：

10.1016/j.mtphys.2021.100600

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Atomically thin 2D carbon-nitride-based Van der Waals heterostructures (vdWHs) are emerging and promising materials for visible-light-driven photocatalysis. However, a large potential barrier between the heterointerfaces of vdWHs prevents photogenerated carriers from being transported, which further limits their practical applications. Here, we report that the strain promotes photocarriers separation in 2D/2D vdWHs for visible-light photocatalysis. The vdWHs assembled by atomically thin carbon nitride sheets (CNs) and molybdenum disulphide (MoS2) are used as an experimental prototype. Experimental results along with density functional theory (DFT) work show that the electric field caused by straining facilitates the separation of photogenerated electron-hole pairs and improves the transport of photogenerated carriers. Consequently, the photocatalytic activities of CHs/MoS2 vdWHs were significantly improved in terms of photocatalytic hydrogen evolution and photodegradation of Rhodamine B under visible-light illumination and ultrasonic irradiation. This study opens the gate to vdWHs-based highperformance photocatalysis. (C) 2021 Published by Elsevier Ltd.

引用

页数：11

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