Citation: Chen Yibo, Li Jing-Feng, Liao Pei-Yu, Zeng Ying-Shan, Wang Zhu, Liu Zhao-Qing. Cascaded electron transition in CuWO₄/CdS/CDs heterostructure accelerating charge separation towards enhanced photocatalytic activity[J]. Chinese Chemical Letters, ;2020, 31(6): 1516-1519. doi: 10.1016/j.cclet.2019.12.013 shu

Cascaded electron transition in CuWO₄/CdS/CDs heterostructure accelerating charge separation towards enhanced photocatalytic activity

School of Chemistry and Chemical Engineering, Guangzhou Key Laboratory for Clean Energy and Materials, Guangzhou University, Guangzhou 510006, China

lzqgzu@gzhu.edu.cn

Received Date: 11 November 2019
Revised Date: 25 November 2019
Accepted Date: 5 December 2019
Available Online: 6 December 2019

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CuWO₄, as an n-type oxide semiconductor with a bandgap of 2.2 eV, has stimulated enormous interest as a potential broad-spectrum-active photocatalyst for environmental pollution remediations. However, rapid charge recombination greatly hinders its practical applications. Herein, we present a cascaded electron transition pathway in a ternary heterostructure consisting of CdS quantum dots, carbon dots (CDs) and CuWO₄ hollow spheres, which proves to greatly facilitate the photogenerated electron-hole separation, and eventually boosts the degradation efficiency of phenol and congo red by 100% and 46% compared to bare CuWO₄. The enhanced performance of the CuWO₄/CdS/CDs heterostructure mainly originates from the unidirectional electron migration from CdS to CuWO₄ and then to the organics through CDs. This work elucidates the electron transfer kinetics in multi-phase system and provides a new design paradigm for optimizing the properties of CuWO₄ based photocatalysts.
- Cascaded electron transition,
- CuWO₄,
- Hollow spheres,
- Carbon dots,
- Photocatalysis
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沈阳化工大学材料科学与工程学院沈阳 110142

Cascaded electron transition in CuWO4/CdS/CDs heterostructure accelerating charge separation towards enhanced photocatalytic activity

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通讯作者: 陈斌, bchen63@163.com

Cascaded electron transition in CuWO₄/CdS/CDs heterostructure accelerating charge separation towards enhanced photocatalytic activity