Decorating Covalent Organic Frameworks with High-density Chelate Groups for Uranium Extraction
作者机构：State Key Laboratory of Luminescent Materials and DevicesInstitute of Polymer Optoelectronic Materials and DevicesSouth China University of TechnologyGuangzhou 510640P.R.China Key Laboratory of Advanced Materials of Tropical Island ResourcesMinistry of EductionSchool of Chemical Engineering and TechnologyHainan UniversityHaikou 570228P.R.China CAS Key Laboratory of Low-Carbon Conversion Science and EngineeringShanghai Advanced Research Institute(SARI)Chinese Academy of Sciences(CAS)Shanghai 201210P.R.China Institute of Nuclear and New Energy TechnologyTsinghua UniversityBeijing 100084P.R.China Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou 510640P.R.China
出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)
年 卷 期：2022年第38卷第2期
页 面：433-439页
核心收录：
学科分类：07[理学] 070304[理学-物理化学(含∶化学物理)] 0703[理学-化学]
基 金：supported by the National Natural Science Foundation of China(Nos.21975078,22061014) the Guangdong Basic and Applied Basic Research Foundation,China(No.2021A1515010311) the Natural Science Foundation of Guangdong Province,China(No.2019B030301003) the 111 Project,and the Thousand Youth Talents Plan.GU Cheng acknowledges the scholarship support from the China Scholarship Council(No.202006155049).
主 题：Two-step post-synthetic modification High-density amidoxime Uranium adsorption
摘 要：The extraction of uranium from aqueous solution is highly desirable for sustaining the increasing demand for environmental safety and nuclear fuel.Herein,we report a strategy using a two-step covalent modification for the synthesis of covalent organic frameworks(COFs)with high-density amidoxime chelate groups at periphery.The introduction of dense amidoxime groups plays a pivotal role in uranium adsorption.The resulting COF exhibits strong affinity with the distribution coefficient of 5.2×104 mL/g and a high adsorption capacity of 319.9 mg/g.The strategy could be expanded to identify and remove different contaminants by introducing special functional groups.
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