Xuhui Guan, Zhili Shen, Lei Chen, Chong Zhang, Chengguo Sun, Yang Du, Bingcheng Hu* and Chao Gao*,
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引用次数: 0
摘要
碘吸附剂在放射性核废料的处理中显示出巨大的潜力。考虑到丰富的结合位点和强大的结合力是提高碘吸附能力的有效策略，本文采用溶剂热合成的方法设计并构建了富氮离子孔共价有机骨架（ICOF-TG-DCA）。ICOF-TG-DCA已被各种技术很好地表征，并表现出具有离子骨架的长程有序结构。此外，还研究了ICOF-TG-DCA在350 K常压气相和I2/KI水溶液中的碘捕集性能，所得材料的碘蒸气吸附量为5.15 g g - 1， I3 -吸附量为2.21 g g - 1。结果表明，ICOF-TG-DCA中富氮基团的存在和离子相互作用有利于碘的捕获。研究表明，构建富氮离子共价有机框架是实现高碘捕获性能的良好策略。
A Nitrogen-Rich Nanoporous Ionic Covalent Organic Framework as Iodine Adsorbent in Gaseous and Aqueous Environments
Adsorbents for iodine capture have shown great potential in the treatment of radioactive nuclear waste. Considering that enriched binding sites and strong binding force are efficient strategies to promote the adsorption capacity of iodine, herein we design and construct a nitrogen-rich ionic nanoporous covalent organic framework (ICOF-TG-DCA) through solvothermal synthesis. ICOF-TG-DCA has been well characterized by various techniques and exhibited long-range order with an ionic skeleton. In addition, the iodine capture of ICOF-TG-DCA was investigated in vapor phase under normal pressure at 350 K and in I2/KI aqueous solution, which the material showed iodine vapor adsorption capacity of 5.15 g g–1 and I3– adsorption capacity of 2.21 g g–1, respectively. The results show that the presence of rich nitrogen groups together with ionic interactions is beneficial to the capture of iodine in ICOF-TG-DCA. The work demonstrates that construction of nitrogen-rich ionic covalent organic frameworks is a good strategy to achieve high iodine capture performance.
期刊介绍：
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.
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