Boosting the Iodine Adsorption and Radioresistance of Th-UiO-66 MOFs via Aromatic Substitution.,Chemistry - A European Journal

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Boosting the Iodine Adsorption and Radioresistance of Th-UiO-66 MOFs via Aromatic Substitution.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-09-22 , DOI: 10.1002/chem.202003621
Zi-Jian Li _{1,

2} , Yu Ju _{1,

2,

3} , Huangjie Lu _{1,

2} , Xiaoling Wu ₁ , Xinle Yu ₁ , Yongxin Li ₄ , Xiaowei Wu ₅ , Zhi-Hui Zhang ₃ , Jian Lin _{1,

2} , Yuan Qian _{1,

2} , Ming-Yang He ₃ , Jian-Qiang Wang _{1,

2,

6}

Affiliation

Effective capture of radioactive iodine is of paramount importance for the safe and long‐term storage of fission products in the nuclear fuel cycle. Herein, a series of functionalized Th‐UiO‐66 MOFs was employed as a model to investigate the effects of substituents on iodine adsorption in both solution and vapor states. Sorption studies revealed that the electro‐donating amino group exhibits the most positive role on increasing the removal rate of iodine from cyclohexane and the uptake capacity of iodine vapor. Particularly, the disubstituted Th‐UiO‐66‐(NH₂)₂ can effectively remove 91.9 % of iodine (300 mg L⁻¹) from cyclohexane and capture 969 mg g⁻¹ iodine vapor, significantly higher than 59.6 % and 334 mg g⁻¹ of untagged Th‐UiO‐66, respectively. In addition, the substituent effect on the radiolytic stability of MOFs was for the first time investigated, leading to the unearthing of one of the most radioresistant MOFs Th‐UiO‐66‐NH₂ reported to date.

中文翻译：

通过芳香取代增强Th-UiO-66 MOF的碘吸附和抗辐射能力。

有效捕获放射性碘对于核燃料循环中裂变产物的安全和长期储存至关重要。本文中，采用一系列功能化的Th-UiO-66 MOF作为模型，研究了取代基对溶液状态和气相状态下碘吸附的影响。吸附研究表明，供电子氨基基团在提高环己烷中碘的去除率和碘蒸气吸收能力方面发挥着最积极的作用。特别是，二取代的Th-UiO-66-（NH ₂）₂可有效地从环己烷中去除91.9％的碘（300 mg L ^-1），并捕获969 mg g ^-1的碘蒸气，明显高于59.6％和334 mg g ^-1分别是未标记的Th-UiO-66。此外，首次研究了取代基对MOFs辐射稳定性的影响，导致了迄今为止报道的最耐辐射的MOFs Th-UiO-66-NH ₂的挖掘。

更新日期：2020-09-22

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