| Autor: |
Liu, Xiaojuan, Gao, Feng, Jin, Tiantian, Ma, Ke, Shi, Haijiang, Wang, Ming, Gao, Yanan, Xue, Wenjuan, Zhao, Jing, Xiao, Songtao, Ouyang, Yinggen, Ye, Guoan |
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| Zdroj: |
Nature Communications; 8/22/2023, Vol. 14 Issue 1, p1-10, 10p |
| Abstrakt: |
The selective separation of thorium from rare earth elements and uranium is a critical part of the development and application of thorium nuclear energy in the future. To better understand the role of different N sites on the selective capture of Th(IV), we design an ionic COF named Py-TFImI-25 COF and its deionization analog named Py-TFIm-25 COF, both of which exhibit record-high separation factors ranging from 102 to 105. Py-TFIm-25 COF exhibits a significantly higher Th(IV) uptake capacity and adsorption rate than Py-TFImI-25 COF, which also outperforms the majority of previously reported adsorbents. The selective capture of Py-TFImI-25 COF and Py-TFIm-25 COF on thorium is via Th-N coordination interaction. The prioritization of Th(IV) binding at different N sites and the mechanism of selective coordination are then investigated. This work provides an in-depth insight into the relationship between structure and performance, which can provide positive feedback on the design of novel adsorbents for this field. Covalent organic frameworks are used in capture of radioactive ions but achieving high separation factors remains challenging. Here, the authors design an ionic COF its neutral non-ionic to better understand the role of different N sites on the selective capture of Th(IV) and report remarkable separation factors ranging from 102 to 105. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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