Citation: Haodong Nie, Kaiqiang Wei, Yi Li, Yan Liu, Yajie Zhao, Hui Huang, Mingwang Shao, Yang Liu, Zhenhui Kang. Carbon dots/Bi₂WO₆ composite with compensatory photo-electronic effect for overall water photo-splitting at normal pressure[J]. Chinese Chemical Letters, ;2021, 32(7): 2283-2286. doi: 10.1016/j.cclet.2021.01.041 shu

Carbon dots/Bi₂WO₆ composite with compensatory photo-electronic effect for overall water photo-splitting at normal pressure

Haodong Nie ^a ,
Kaiqiang Wei ^a ,
Yi Li ^a ,
Yan Liu ^a ,
Yajie Zhao ^a ,
Hui Huang ^a ,
Mingwang Shao ^a ,
Yang Liu ^{a, *,} ,
Zhenhui Kang ^{a, b, *,}

a.
Institute of Functional Nano and Soft Materials Laboratory (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou 215123, China
b.
Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Macao 999078, China

yangl@suda.edu.cn

zhkang@suda.edu.cn

Received Date: 21 October 2020
Revised Date: 15 January 2021
Accepted Date: 19 January 2021
Available Online: 27 January 2021

Figures(3)

Overall water photo-splitting is a prospective ideal pathway to produce ultra-clean H₂ energy by semiconductors. However, the band structure of many semiconductors cannot satisfy the requirement of H₂ and O₂ production at the same time. Herein, we illustrate that carbon dots (CDs)/Bi₂WO₆ photocatalyst with compensatory photo-electronic effect has enhanced activity for overall water photo-splitting without any sacrificial agent. In this complex photocatalytic system, the photo-potential provided by CDs makes the CDs/Bi₂WO₆ (C-BWO) composite could satisfy the band structure conditions for overall water photo-splitting. The C-BWO composite (3 wt% CDs content) exhibits optimized hydrogen evolution (oxygen evolution) of 0.28 μmol/h (0.12 μmol/h) with an approximate 2:1 (H₂: O₂) stoichiometry at normal pressure. We further employed the in-situ transient photovoltage (TPV) technique to study the photoelectron extraction and the interface charge transfer kinetics of this composite catalyst.
- Carbon dots,
- In-situ transient photovoltage measurement,
- Photoelectron extraction,
- Photocatalytic hydrogen evolution,
- Normal pressure
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沈阳化工大学材料科学与工程学院沈阳 110142

Carbon dots/Bi2WO6 composite with compensatory photo-electronic effect for overall water photo-splitting at normal pressure

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通讯作者: 陈斌, bchen63@163.com

Carbon dots/Bi₂WO₆ composite with compensatory photo-electronic effect for overall water photo-splitting at normal pressure