Citation: Shuyang Li, Zhiwei Niu, Duoqiang Pan, Zhenpeng Cui, Hewen Shang, Jie Lian, Wangsuo Wu. Efficient photoreduction strategy for uranium immobilization based on graphite carbon nitride/activated carbon nanocomposites[J]. Chinese Chemical Letters, ;2022, 33(7): 3581-3584. doi: 10.1016/j.cclet.2022.03.043 shu

Efficient photoreduction strategy for uranium immobilization based on graphite carbon nitride/activated carbon nanocomposites

Shuyang Li ^b ,
Zhiwei Niu ^{b, c} ,
Duoqiang Pan ^{a, b, *,} ,
Zhenpeng Cui ^b ,
Hewen Shang ^b ,
Jie Lian ^b ,
Wangsuo Wu ^{a, c, *,}

a.
Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, China
b.
School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
c.
Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, Lanzhou 730000, China

panduoqiang@lzu.edu.cn

wuws@lzu.edu.cn

Received Date: 24 December 2021
Revised Date: 7 March 2022
Accepted Date: 10 March 2022
Available Online: 13 March 2022

Figures(4)

Uranium removal from aqueous solutions using environmentally friendly photocatalytic technology is a novel approach for resource recovery. Herein, carbon nitride/activated carbon composite materials (CN/AC) were investigated for U(Ⅵ) reduction under visible light. An exceptional boost in photocatalytic activity was observed for CN/AC composites (up to 70 times over the conventional bulk g-C₃N₄). The strong interactive conjugated π-bond structure between g-C₃N₄ and AC accelerated the migration of carriers and then prolonged the electron lifetime. CN/AC composites exhibited excellent compatibility with different water substrates and were resilience to a wide range of pH changes and abundant competitive anions/cations. Quenching experiments and electron microscopy characterization indicated that U(Ⅵ) was reduced by photogenerated electrons and deposited on the edge of CN/AC composites. The low-cost, high-performance carbon-based composite material proposed in this work is a potential candidate for the efficient treatment of radioactive wastewater.
- Uranium removal,
- Photoreduction,
- Graphitic carbon nitride,
- Activated carbon,
- Composite material
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