Citation: Zhe Wang, Lingyu Zhang, Zhen Lei, Liyuan Zheng, Liqin Huang, Shuang Liu, Yuexiang Lu. Carbon dots and polyurethane composite for photo-induced elimination of uranium under air atmosphere[J]. Chinese Chemical Letters, ;2023, 34(9): 108146. doi: 10.1016/j.cclet.2023.108146 shu

Carbon dots and polyurethane composite for photo-induced elimination of uranium under air atmosphere

Zhe Wang ^a ,
Lingyu Zhang ^a ,
Zhen Lei ^a ,
Liyuan Zheng ^a ,
Liqin Huang ^b ,
Shuang Liu ^{b, c, *,} ,
Yuexiang Lu ^{b, *,}

a.
The MOE Key Laboratory of Resources and Environmental System Optimization, College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China
b.
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
c.
Nuclear Research Institute for Future Technology and Policy, Seoul National University, Seoul 08826, Republic of Korea

liushuang@snu.ac.kr

luyuexiang@mail.tsinghua.edu.cn

Received Date: 14 November 2022
Revised Date: 6 January 2023
Accepted Date: 11 January 2023
Available Online: 13 January 2023

Figures(5)

Uranium is the main fuel of nuclear power and elimination uranium from nuclear wastewater is significant both in environmental protection and fuel recycle. Here we report for the first time the synthesis of carbon dots/polyurethane (CDs/PU) composite materials for the photoinduced elimination of uranium from water. Irradiated with visible light, CDs/PU could eliminate uranium efficiently with the generation of (UO₂)O₂·2H₂O as solid products in air. The further investigated mechanism showed that the addition of CDs/PU could produce more H₂O₂ under visible light, which reacted with uranyl ions to form (UO₂)O₂·2H₂O. Importantly, the sponge-like CDs/PU could be easily removed from water with high reusability as the elimination efficiency remained above 95% after 5 cycles. CDs/PU also displayed good selectivity in the presence of other metal ions. Our work affords exciting strategies for developing photocatalysts and eliminating uranium from water.
- Carbon dots,
- Polyurethane,
- Uranium,
- Photocatalyst,
- Air atmosphere
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