铀
吸附剂
双功能
选择性
钒
吸附
材料科学
单体
丙烯酰胺
海水
聚合物
核化学
有机化学
化学
吸附
冶金
复合材料
催化作用
地质学
海洋学
作者
Marek Piechowicz,Carter W. Abney,Nathan C. Thacker,James C. Gilhula,Youfu Wang,Samuel S. Veroneau,Aiguo Hu,Wenbin Lin
标识
DOI:10.1021/acsami.7b04656
摘要
The amidoxime group (-RNH2NOH) has long been used to extract uranium from seawater on account of its high affinity toward uranium. The development of tunable sorbent materials for uranium sequestration remains a research priority as well as a significant challenge. Herein, we report the design, synthesis, and uranium sorption properties of bis-amidoxime-functionalized polymeric materials (BAP 1-3). Bifunctional amidoxime monomers were copolymerized with an acrylamide cross-linker to obtain bis-amidoxime incorporation as high as 2 mmol g-1 after five synthetic steps. The resulting sorbents were able to uptake nearly 600 mg of uranium per gram of polymer after 37 days of contact with a seawater simulant containing 8 ppm uranium. Moreover, the polymeric materials exhibited low vanadium uptake with a maximum capacity of 128 mg of vanadium per gram of polymer. This computationally predicted and experimentally realized selectivity of uranium over vanadium, nearly 5 to 1 w/w, is one of the highest reported to date and represents an advancement in the rational design of sorbent materials with high uptake capacity and selectivity.
科研通智能强力驱动
Strongly Powered by AbleSci AI