A Crosslinked Ionic Organic Framework for Efficient Iodine and Iodide Remediation in Water
A Crosslinked Ionic Organic Framework for Efficient Iodine and Iodide Remediation in Water
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用于有效修复水中碘和碘化物的交联离子有机框架
DOI：
10.1002/anie.202214189
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Ke, Chenfeng
中科院分区：
文献类型：
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作者：
Zhang, Mingshi;Samanta, Jayanta;Atterberry, Benjamin A.;Staples, Richard;Rossini, Aaron J.;Ke, Chenfeng
碘被广泛用作野外和外太空水消毒的抗菌试剂，但出于健康原因，需要去除残留的碘和碘化物。目前，去除水中低浓度的碘和碘化物（1.5 ppm）具有挑战性。 此外，碘和碘化物在宽温度范围（高达90 °C）内的修复以前从未被研究过。在这项工作中，我们报告了硝酸盐二聚体定向合成单晶离子氢键交联有机框架（HCOF-7）。HCOF-7通过卤素键合和阴离子交换有效去除水中的碘和碘化物，在室温下将总碘浓度降低至0.22 ppm。 填充的HCOF-7柱用于23 ° C至90 °C之间的碘/碘化物穿透实验，并记录了大的穿透体积（≥18.3 L g−1）。 在实际条件下记录的高碘/碘化物去除基准使HCOF-7成为一种有前途的水处理吸附剂。
Iodine is widely used as an antimicrobial reagent for water disinfection in the wilderness and outer space, but residual iodine and iodide need to be removed for health reasons. Currently, it is challenging to remove low concentrations of iodine and iodide in water (≈5 ppm). Furthermore, the remediation of iodine and iodide across a broad temperature range (up to 90 °C) has not previously been investigated. In this work, we report a nitrate dimer‐directed synthesis of a single‐crystalline ionic hydrogen‐bonded crosslinked organic framework (HCOF‐7). HCOF‐7 removes iodine and iodide species in water efficiently through halogen bonding and anion exchange, reducing the total iodine concentration to 0.22 ppm at room temperature. Packed HCOF‐7 columns were employed for iodine/iodide breakthrough experiments between 23 and 90 °C, and large breakthrough volumes were recorded (≥18.3 L g−1). The high iodine/iodide removal benchmarks recorded under practical conditions make HCOF‐7 a promising adsorbent for water treatment.