Functional porous organic polymer with high S and N for reversible iodine capture
Functional porous organic polymer with high S and N for reversible iodine capture
复制标题
具有高硫和氮的功能性多孔有机聚合物，用于可逆碘捕获
DOI：
10.1016/j.micromeso.2020.110161
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发表时间：
2020-06-15
影响因子：
5.2
通讯作者：
Cheng, Guoe
中科院分区：
文献类型：
--
作者：
Pan, Xiaowei;Ding, Chenghan;Cheng, Guoe
放射性碘等核废料因其对生物健康的影响而受到全世界的关注。放射性碘的有效捕获对于核能的安全利用具有重要意义。以二硫代碳二亚胺（DTO）和苯并[1，2-B：3，4-b '：5，6-B“]三噻吩-2，5，8-三甲醛（BTT-THO）为原料，在无催化剂的水热反应条件下，在N，N-二甲基甲酰胺中合成了一种高硫、高氮含量的功能性多孔有机聚合物（P-TzTz）。这种特制的无定形聚合物由于其有效的富电子吸附位点、π共轭结构和分级多孔结构而对碘表现出高亲和力和吸附能力。P-TzTz显示出优异的可逆碘吸收，对于挥发性碘的容量为326重量%。经过5次挥发性碘吸附循环后，P-TzTz几乎保持与原吸附剂相同的吸附容量。此外，P-TzTz对碘/环己烷溶液中碘的吸附容量为494.09 mg g（-1），表明P-TzTz也是一种有效的碘吸附剂。
Nuclear waste such as radioactive iodine has been received worldwide attention because of the effects of radiation on biological health. The efficient capture of radioactive iodine is of great importance for the safe utilization of nuclear energy. In this study, a functional porous organic polymer (P-TzTz) with high sulfur and nitrogen contents was synthesized by the catalyst-free hydrothermal process of dithiocarbanate (DTO) and benzo [1,2-b:3,4-b':5,6-b '']trithiophene-2,5,8-tricarbaldehyde (BTT-THO) in N,N-dimethylformamide under N-2 atmosphere. This tailor-made amorphous polymer exhibits high affinity and adsorption capacity for iodine owing to its effective electron-rich sorption sites, pi-conjugated structure and hierarchically porous structure. P-TzTz displays an excellent reversible iodine uptake with capacity of 326 wt% for volatile iodine. After five cycles of volatile iodine adsorption, P-TzTz almost retains the same adsorption capacity with the original adsorbent. In addition, P-TzTz also exhibits excellent adsorptive performance for the removal of iodine from iodine/cyclohexane solution with an adsorption capacity of 494.09 mg g(-1), suggesting that P-TzTz may be also an effective adsorbent for the removal of iodine from solution.