聚吡咯
碘
沸石咪唑盐骨架
咪唑酯
纳米复合材料
材料科学
纳米技术
环己烷
纳米颗粒
核化学
化学工程
金属有机骨架
化学
聚合物
无机化学
吸附
有机化学
工程类
聚合
作者
Kaiwei Chen,Aotian Gu,Xinyu Zhou,Peng Wang,Chunhui Gong,Ping Mao,Yan Jiao,Kai Chen,Yi Yang
标识
DOI:10.1016/j.colsurfa.2022.130751
摘要
Effective capture of radioiodine derived from nuclear reactor accidents and spent fuel reprocessing is of critical significance for the sustainable development of nuclear energy. Herein, we reported the successful synthesis of core-shell [email protected] (PZ) nanocomposites with ZIF-8 nanocrystals decorating polypyrrole nanotubes (PPyNT) through a facile, self-assembly procedure. Taking advantage of abundant electron-rich nitrogen atoms of polypyrrole skeleton as well as the high specific surface areas and porosities, these PZ nanocomposites had potential application in radioiodine capture. The maximum uptake capacity of as-synthesized PZ nanocomposites for vapor iodine reached up to 603.8 wt% within 5 h. Additionally, PZ nanocomposites exhibited excellent recycle abilities, as the uptake capacity of PZ-3 still remained 381.7 wt% (63.2% of the initial capacity) after five capture-release cycles. In iodine/cyclohexane solution, the maximum iodine adsorption capacity was 837.9 mg g-1 and all of the loaded iodine could be effectively released in ethanol solution. The excellent iodine capture performance was primarily attributed to the strong affinity between the Lewis acidic iodine molecules and the Lewis basic nitrogen atoms to form polyiodide ions. Considering their excellent iodine adsorption capacity and superior stability, PZ nanocomposites could be employed to effectively eliminate radioactive iodine.
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