Robust hydrogels with hierarchical porosities from the controlled assembly of metal-organic polyhedra for rapid removal of low-concentration aqueous iodine
Journal of Materials Chemistry A, ISSN: 2050-7496, Vol: 12, Issue: 39, Page: 26465-26470
2024
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Article Description
The removal of radioactive aqueous iodine is critical to the minimization of environmental impacts from nuclear energy production; however, its rapid and efficient removal at low-concentration level is still challenging. Herein, 2 nm metal-organic polyhedra (MOP) with a high binding affinity towards iodine are supramolecularly complexed with hydrophilic telechelic polymers and robust hybrid hydrogels with controlled hierarchical porosities can be obtained. The topologies of macromolecular ligands and the polymer/MOP concentrations are varied to elucidate the phase diagrams for hydrogel formation. The gels' meso-channel sizes and the distribution of hierarchical pores can be effectively regulated by varying the polymers' end groups and topologies. The meso-channels with optimized sizes favor the rapid diffusion of iodine while the homogenous distribution of MOP units maximizes the accessible area of MOP micropores, which cooperatively contributes to the high iodine capture efficiency. The MOP hydrogel demonstrated high absorption rate (2.336 g g h) towards iodine molecules, surpassing most of the as-reported adsorbents. The work not only provides solutions for the robust formation of MOP-based hydrogels, but also paves new avenues for the effective treatment of low dose aqueous radioactive iodine.
Bibliographic Details
Royal Society of Chemistry (RSC)
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