Highly efficient iodine capture from vapor and water using UiO-66-X: Effects of functional group modifications

IF 2.7 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Inorganica Chimica Acta Pub Date : 2024-11-04 DOI:10.1016/j.ica.2024.122419

Guang-Li Zhou , Bo-Wen Liu , Guang-Yu Cui , Wei Zhang , Ji-Min Yang

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Abstract

Radioactive iodine waste from the nuclear industry poses a critical threat to human health, and its effective capture has become an important research topic. In this study, modified UiO-66-X adsorbents (where X is ATA, BTA, or STA) were used to investigate the effects of the free functional groups in the UiO-66 skeleton on iodine capture in the vapor and solution states. The adsorption behavior revealed that the capture efficiency of UiO-66-ATA was substantially higher than that of UiO-66-BTA and UiO-66-STA because the electron-donating amino groups could enhance the I − I···π halogen bond interactions compared with the electron-withdrawing carboxyl and sulfonic acid groups. In addition, the pore volume of UiO-66-ATA was significantly higher than those of UiO-66-BTA and UiO-66-STA. In particular, the removal uptakes of UiO-66-ATA were 1108.1 mg/g (vapor phase) and 3601.9 mg/g (aqueous solution). This study is the first to investigate the effects of functional groups on the adsorption uptake of UiO-66 toward iodine. This efficient functional group modification strategy holds significant promise for the development of novel metal–organic framework adsorbents.

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使用 UiO-66-X 从水蒸气中高效捕获碘：官能团修饰的影响

核工业产生的放射性碘废料对人类健康构成严重威胁，有效捕获碘废料已成为一个重要的研究课题。本研究采用改性的 UiO-66-X 吸附剂（其中 X 为 ATA、BTA 或 STA）来研究 UiO-66 骨架中的游离官能团对蒸汽态和溶液态碘捕获的影响。吸附行为表明，UiO-66-ATA 的捕集效率大大高于 UiO-66-BTA 和 UiO-66-STA，这是因为与吸电子的羧基和磺酸基相比，供电子的氨基能增强 I - I---π 卤素键的相互作用。此外，UiO-66-ATA 的孔体积明显高于 UiO-66-BTA 和 UiO-66-STA。其中，UiO-66-ATA 的去除率分别为 1108.1 mg/g（气相）和 3601.9 mg/g（水溶液）。这项研究首次探讨了官能团对 UiO-66 对碘的吸附吸收的影响。这种高效的官能团修饰策略为新型金属有机框架吸附剂的开发带来了重大希望。

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来源期刊

Inorganica Chimica Acta 化学-无机化学与核化学

CiteScore

6.00

自引率

3.60%

发文量

440

审稿时长

35 days

期刊介绍： Inorganica Chimica Acta is an established international forum for all aspects of advanced Inorganic Chemistry. Original papers of high scientific level and interest are published in the form of Articles and Reviews. Topics covered include: • chemistry of the main group elements and the d- and f-block metals, including the synthesis, characterization and reactivity of coordination, organometallic, biomimetic, supramolecular coordination compounds, including associated computational studies; • synthesis, physico-chemical properties, applications of molecule-based nano-scaled clusters and nanomaterials designed using the principles of coordination chemistry, as well as coordination polymers (CPs), metal-organic frameworks (MOFs), metal-organic polyhedra (MPOs); • reaction mechanisms and physico-chemical investigations computational studies of metalloenzymes and their models; • applications of inorganic compounds, metallodrugs and molecule-based materials. Papers composed primarily of structural reports will typically not be considered for publication.