2D/2D atomic double-layer WS2/Nb2O5 shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H2 evolution

Bo Lin; Hao Chen; Yao Zhou; Xiao Luo; Dan Tian; Xiaoqing Yan; Ruihuan Duan; Jun Di; Lixing Kang; Aimin Zhou; Guidong Yang; Yonghui Li; Jiadong Zhou; Zheng Liu; Fucai Liu

doi:10.1016/j.cclet.2021.03.057

2D/2D atomic double-layer WS₂/Nb₂O₅ shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H₂ evolution

Bo Lin, Hao Chen, Yao Zhou, Xiao Luo, Dan Tian, Xiaoqing Yan, Ruihuan Duan, Jun Di, Lixing Kang, Aimin Zhou, Guidong Yang, Yonghui Li^*, Jiadong Zhou, Zheng Liu, Fucai Liu

^*Corresponding author for this work

School of Physics

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Low-efficiency charge transfer is a critical factor to limit the photocatalytic H₂ evolution activity of semiconductor photocatalysts. The interface design is a promising approach to achieve high charge-transfer efficiency for photocatalysts. Herein, a new 2D/2D atomic double-layer WS₂/Nb₂O₅ shell/core photocatalyst (DLWS/Nb₂O₅) is designed. The atom-resolved HAADF-STEM results unravel the presence of an unusual 2D/2D shell/core interface in DLWS/Nb₂O₅. Taking advantage of the advanced femtosecond-resolved ultrafast TAS spectra, the average lifetime of charge carriers for DLWS/Nb₂O₅ (180.97 ps) is considerably shortened as compared to that of Nb₂O₅ (230.50 ps), strongly indicating that the 2D/2D shell/core interface enables DLWS/Nb₂O₅ to achieve ultrafast charge transfer from Nb₂O₅ to atomic double-layer WS₂, thus yielding a high photocatalytic H₂ evolution rate of 237.6 μmol/h, up to 10.8 times higher than that of pure Nb₂O₅ nanosheet. This study will open a new window for the development of high-efficient photocatalytic systems through the interface design.

Original language	English
Pages (from-to)	3128-3132
Number of pages	5
Journal	Chinese Chemical Letters
Volume	32
Issue number	10
DOIs	https://doi.org/10.1016/j.cclet.2021.03.057
Publication status	Published - Oct 2021

Keywords

2D/2D shell/core interface
Atomic double-layer WS
Charge transfer
NbO nanosheet
Photocatalytic H evolution

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10.1016/j.cclet.2021.03.057

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Lin, B., Chen, H., Zhou, Y., Luo, X., Tian, D., Yan, X., Duan, R., Di, J., Kang, L., Zhou, A., Yang, G., Li, Y., Zhou, J., Liu, Z., & Liu, F. (2021). 2D/2D atomic double-layer WS₂/Nb₂O₅ shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H₂ evolution. Chinese Chemical Letters, 32(10), 3128-3132. https://doi.org/10.1016/j.cclet.2021.03.057

@article{d9e0b24a0ab142d382015a3ddec5cda3,

title = "2D/2D atomic double-layer WS2/Nb2O5 shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H2 evolution",

abstract = "Low-efficiency charge transfer is a critical factor to limit the photocatalytic H2 evolution activity of semiconductor photocatalysts. The interface design is a promising approach to achieve high charge-transfer efficiency for photocatalysts. Herein, a new 2D/2D atomic double-layer WS2/Nb2O5 shell/core photocatalyst (DLWS/Nb2O5) is designed. The atom-resolved HAADF-STEM results unravel the presence of an unusual 2D/2D shell/core interface in DLWS/Nb2O5. Taking advantage of the advanced femtosecond-resolved ultrafast TAS spectra, the average lifetime of charge carriers for DLWS/Nb2O5 (180.97 ps) is considerably shortened as compared to that of Nb2O5 (230.50 ps), strongly indicating that the 2D/2D shell/core interface enables DLWS/Nb2O5 to achieve ultrafast charge transfer from Nb2O5 to atomic double-layer WS2, thus yielding a high photocatalytic H2 evolution rate of 237.6 μmol/h, up to 10.8 times higher than that of pure Nb2O5 nanosheet. This study will open a new window for the development of high-efficient photocatalytic systems through the interface design.",

keywords = "2D/2D shell/core interface, Atomic double-layer WS, Charge transfer, NbO nanosheet, Photocatalytic H evolution",

author = "Bo Lin and Hao Chen and Yao Zhou and Xiao Luo and Dan Tian and Xiaoqing Yan and Ruihuan Duan and Jun Di and Lixing Kang and Aimin Zhou and Guidong Yang and Yonghui Li and Jiadong Zhou and Zheng Liu and Fucai Liu",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = oct,

doi = "10.1016/j.cclet.2021.03.057",

language = "English",

volume = "32",

pages = "3128--3132",

journal = "Chinese Chemical Letters",

issn = "1001-8417",

publisher = "Elsevier B.V.",

number = "10",

}

Lin, B, Chen, H, Zhou, Y, Luo, X, Tian, D, Yan, X, Duan, R, Di, J, Kang, L, Zhou, A, Yang, G, Li, Y, Zhou, J, Liu, Z & Liu, F 2021, '2D/2D atomic double-layer WS₂/Nb₂O₅ shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H₂ evolution', Chinese Chemical Letters, vol. 32, no. 10, pp. 3128-3132. https://doi.org/10.1016/j.cclet.2021.03.057

TY - JOUR

T1 - 2D/2D atomic double-layer WS2/Nb2O5 shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H2 evolution

AU - Lin, Bo

AU - Chen, Hao

AU - Zhou, Yao

AU - Luo, Xiao

AU - Tian, Dan

AU - Yan, Xiaoqing

AU - Duan, Ruihuan

AU - Di, Jun

AU - Kang, Lixing

AU - Zhou, Aimin

AU - Yang, Guidong

AU - Li, Yonghui

AU - Zhou, Jiadong

AU - Liu, Zheng

AU - Liu, Fucai

PY - 2021/10

Y1 - 2021/10

N2 - Low-efficiency charge transfer is a critical factor to limit the photocatalytic H2 evolution activity of semiconductor photocatalysts. The interface design is a promising approach to achieve high charge-transfer efficiency for photocatalysts. Herein, a new 2D/2D atomic double-layer WS2/Nb2O5 shell/core photocatalyst (DLWS/Nb2O5) is designed. The atom-resolved HAADF-STEM results unravel the presence of an unusual 2D/2D shell/core interface in DLWS/Nb2O5. Taking advantage of the advanced femtosecond-resolved ultrafast TAS spectra, the average lifetime of charge carriers for DLWS/Nb2O5 (180.97 ps) is considerably shortened as compared to that of Nb2O5 (230.50 ps), strongly indicating that the 2D/2D shell/core interface enables DLWS/Nb2O5 to achieve ultrafast charge transfer from Nb2O5 to atomic double-layer WS2, thus yielding a high photocatalytic H2 evolution rate of 237.6 μmol/h, up to 10.8 times higher than that of pure Nb2O5 nanosheet. This study will open a new window for the development of high-efficient photocatalytic systems through the interface design.

AB - Low-efficiency charge transfer is a critical factor to limit the photocatalytic H2 evolution activity of semiconductor photocatalysts. The interface design is a promising approach to achieve high charge-transfer efficiency for photocatalysts. Herein, a new 2D/2D atomic double-layer WS2/Nb2O5 shell/core photocatalyst (DLWS/Nb2O5) is designed. The atom-resolved HAADF-STEM results unravel the presence of an unusual 2D/2D shell/core interface in DLWS/Nb2O5. Taking advantage of the advanced femtosecond-resolved ultrafast TAS spectra, the average lifetime of charge carriers for DLWS/Nb2O5 (180.97 ps) is considerably shortened as compared to that of Nb2O5 (230.50 ps), strongly indicating that the 2D/2D shell/core interface enables DLWS/Nb2O5 to achieve ultrafast charge transfer from Nb2O5 to atomic double-layer WS2, thus yielding a high photocatalytic H2 evolution rate of 237.6 μmol/h, up to 10.8 times higher than that of pure Nb2O5 nanosheet. This study will open a new window for the development of high-efficient photocatalytic systems through the interface design.

KW - 2D/2D shell/core interface

KW - Atomic double-layer WS

KW - Charge transfer

KW - NbO nanosheet

KW - Photocatalytic H evolution

UR - http://www.scopus.com/inward/record.url?scp=85103736363&partnerID=8YFLogxK

U2 - 10.1016/j.cclet.2021.03.057

DO - 10.1016/j.cclet.2021.03.057

M3 - Article

AN - SCOPUS:85103736363

SN - 1001-8417

VL - 32

SP - 3128

EP - 3132

JO - Chinese Chemical Letters

JF - Chinese Chemical Letters

IS - 10

ER -

2D/2D atomic double-layer WS₂/Nb₂O₅ shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H₂ evolution

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Keywords

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