Optimizing Strategy for Enhancing the Stability and 99 TcO 4 - Sequestration of Poly(ionic liquids)@MOFs Composites
Metal-organic frameworks (MOFs) are a class of promising sorbents for effective sequestration of radioactive TcO anions. However, their poor stability and slow sorption kinetics in the industrial condition pose a great challenge. Herein, we demonstrate an optimizing strategy via polymerization of io...
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Published in | ACS central science Vol. 6; no. 12; pp. 2354 - 2361 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
United States
23.12.2020
|
Online Access | Get full text |
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Summary: | Metal-organic frameworks (MOFs) are a class of promising sorbents for effective sequestration of radioactive
TcO
anions. However, their poor stability and slow sorption kinetics in the industrial condition pose a great challenge. Herein, we demonstrate an optimizing strategy via
polymerization of ionic liquids (ILs) encapsulated in the pores of MOFs, forming polyILs@MOFs composites with greatly enhanced TcO
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 HNO
). The final optimized composite shows fast sorption kinetics (<30 s), good regeneration (>30 cycles), and superior uptake performance for TcO
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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ISSN: | 2374-7943 2374-7951 |
DOI: | 10.1021/acscentsci.0c01342 |