首页|Harvesting the Vibration Energy of CdS for High-Efficient Piezo-Photocatalysis Removal of U(Ⅵ):Roles of Shape Dependent and Piezoelectric Polarization

Harvesting the Vibration Energy of CdS for High-Efficient Piezo-Photocatalysis Removal of U(Ⅵ):Roles of Shape Dependent and Piezoelectric Polarization

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Piezo-photocatalysis could coalesce the advantages of mechanical vibration and solar energy perfectly to achieve high-efficiency catalytic activity.Herein,the quintessential piezoelectric material CdS nanowires with different aspect ratios are precisely constructed and applied for piezo-photocatalytic reduction of U(Ⅵ)for the first time.The ultrasonic(60 kHz,100 W)induces piezoelectric potential to generate a 0.57 eV A-1 electric field,which is added to the direction of CdS(010)as a driving force to efficiently separate photogenerated charges.The alliance between piezoelectric effect and photocatalytic activity endows CdS NW-3 with the fastest piezo-photocatalytic rate under ultrasonic vibration and 5 W LED irradiation,and the relevant rate constant(0.042 min-1)is about 12 and 53.8 times than that of LED and ultrasonication.More importantly,93.74％of U(Ⅵ)could be removed from natural uranium mine wastewater.Therefore,this piezo-photocatalysis system that reduces U(Ⅵ)to easily separable(UO2)O2·2H2O(s)provides valuable input for disposal applications of radioactive wastewater and broadens the horizons of nuclear energy utilization toward the advancement of carbon neutrality.

(UO2)O2·2H2OCdS nanowirespiezo-photocatalyticpiezo-potentialU(Ⅵ)

Zhimin Dong、Donglin Gao、Zifan Li、Haonan Pei、Lin Xu、Jian Huang、Xiaohong Cao、Youqun Wang、Ting Wang、Qianglin Wei、Zhibin Zhang、Yunhai Liu

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State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China

Institute of Geology,Chinese Academy of Geological Sciences,26 Baiwanzhuang Road,Beijing 100037,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaJiangxi Provincial Natural Science FoundationJiangxi Provincial Natural Science Foundation

2227603022206024U21672232207602220232BAB21303420232ACB203011

2024

10.1002/eem2.12705

能源与环境材料(英文)

能源与环境材料(英文)

ISSN：
年,卷(期)：2024.7(5)