吸附
聚合
离子液体
复合数
材料科学
化学工程
动力学
离子键合
涂层
金属有机骨架
离子
纳米技术
化学
复合材料
聚合物
催化作用
吸附
有机化学
工程类
物理
量子力学
作者
Cheng‐Peng Li,Hai-Ruo Li,Jin-Yun Ai,Jing Chen,Miao Du
出处
期刊:ACS central science
[American Chemical Society]
日期:2020-11-30
卷期号:6 (12): 2354-2361
被引量:48
标识
DOI:10.1021/acscentsci.0c01342
摘要
Metal–organic frameworks (MOFs) are a class of promising sorbents for effective sequestration of radioactive 99TcO4– anions. However, their poor stability and slow sorption kinetics in the industrial condition pose a great challenge. Herein, we demonstrate an optimizing strategy via in situ polymerization of ionic liquids (ILs) encapsulated in the pores of MOFs, forming polyILs@MOFs composites with greatly enhanced TcO4– sequestration compared with the pristine MOFs. Notably, the cross-linked polymerization of ILs facilitates the formation of both the inside ionic filler as the active sites and outside coating as the protective layers of MOFs, which is significantly beneficial to obtain the optimized sorption materials of exceptional stability under extreme conditions (e.g., in 6 M HNO3). The final optimized composite shows fast sorption kinetics (<30 s), good regeneration (>30 cycles), and superior uptake performance for TcO4– in highly acidic conditions and simulated recycle stream. This strategy opens up a new opportunity to construct the highly stable MOF-based composites and extend their applicability in different fields.
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