Chemical Research in Chinese Universities ›› 2022, Vol. 38 ›› Issue (2): 472-477.doi: 10.1007/s40242-022-2057-2

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A Two-dimensional Dual-pore Covalent Organic Framework for Efficient Iodine Capture

WEN Zhongliang, WANG Shenglin, FU Siyao, QIAN Jiaying, YAN Qianqian, XU Huanjun, ZUO Kaiming, SU Xiaofang, ZENG Chaoyuan, GAO Yanan   

  1. Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228, P. R. China
  • Received:2022-02-18 Revised:2022-03-09 Online:2022-04-01 Published:2022-05-18
  • Contact: SU Xiaofang, ZENG Chaoyuan, GAO Yanan E-mail:994405@hainanu.edu.cn;zengchaoyuan@hainanu.edu.cn;ygao@hainanu.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Nos.21965011, 22165009, 22105053), the Major Science and Technology Plan of Hainan Province, China(No.ZDKJ202016), the Natural Science Foundation of Hainan Province, China(Nos.220QN281, 521QN209), and the Innovation Research Project for Postgraduates in Hainan Province, China(Nos.Hys2020-64, Hys2020-65).

Abstract: Effectively capturing volatile radioiodine generated during the nuclear fission process is considered to be a safe way to the utilization of nuclear power. Here we report a new two-dimensional covalent organic framework(2D COF), ETTA-PyTTA-COF, as a highly efficient iodine adsorbent, which is constructed through the condensation reaction between 4,4’,4’’,4’’’-(ethene-1,1,2,2-tetrayl)-tetrabenzaldehyde(ETTA) and 1,3,6,8-tetrakis(4-aminophenyl)pyrene(PyTTA). The ETTA-PyTTA-COF possesses a permanent 1D channel porous structure with a high Brunauer-Emmet-Teller(BET) surface area of 1519 m2/g and excellent chemical and thermal stability. It shows ultrahigh iodine adsorption capability, which can reach up to 4.6 g/g in vapor owing to its high BET surface area, large π-conjugated structure and plenty of imine groups in the skeleton of the COF as effective iodine sorption sites.

Key words: Covalent organic framework, Iodine capture, Porous material, Adsorbent, Nuclear energy