Redox-Active Two-Dimensional Covalent Organic Frameworks (COFs) for Selective Reductive Separation of Valence-Variable,Redox-Sensitive and Long-Lived Radionuclides |
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| Authors: | Dr. Yang Li Dr. Xinghua Guo Dr. Xiaofeng Li Dr. Meicheng Zhang Dr. Zhimin Jia Prof. Yun Deng Prof. Yin Tian Prof. Shoujian Li Prof. Lijian Ma |
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| Affiliation: | 1. College of Chemistry, Sichuan University, Key Laboratory of Radiation Physics & Technology, Ministry of Education, No. 29 Wangjiang Road, Chengdu, 610064 P. R. China;2. School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137 P. R. China |
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| Abstract: | We report the first example of 2D covalent organic framework nanosheets (Redox-COF1) for the selective reduction and in situ loading of valence-variable, redox-sensitive and long-lived radionuclides (abbreviated as VRL nuclides). Compared with sorbents based on chemical adsorption and physical adsorption, the redox adsorption mechanism of Redox-COF1 can effectively reduce the impact of functional group protonation under the usual high-acidity conditions in chemisorption, and raise the adsorption efficiency from the monotonous capture by pores in physisorption. The adsorption selectivity for UO22+ reaches up to unprecedented ca. 97 % at pH 3, more than for any analogous adsorbing material. |
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| Keywords: | Kernenergie Kovalente organische Gerüste Redoxadsorption Sorption Uran |
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