Linkage Design in Two-Dimensional Covalent Organic Frameworks for High Iodine Uptake.

Macromol Rapid Commun

College of Chemical Engineering and Technology, Hainan University, Haikou, 570228, China.

Published: April 2023

AI Article Synopsis

  • * Covalent organic frameworks (COFs) are innovative porous materials designed for efficient iodine adsorption, with the study focusing on two types: imine-linkage COF (I-COF) and hydrazone-linked COF (H-COF).
  • * H-COF, constructed under solvothermal conditions, demonstrates exceptional properties such as high porosity, stability, and a surface area of 1747 m²/g, leading to a significantly high iodine capture value of 5.72 g/g, outperforming previous materials.

Article Abstract

Radioactive iodine waste in the nuclear field is harmful to the environment and human health. Covalent organic frameworks (COFs) are a novel kind of porous organic material with a well-fine and unformal structure, which is an excellent candidate as a solid adsorbent for iodine adsorption. Herein, a linkage design is proposed for effective iodine adsorption. Imine-linkage COF (I-COF) and hydrazone-linked COF (H-COF) are constructed under solvothermal conditions. The Brunauer-Emmett-Teller surface area of H-COF is as high as 1747 m g . Furthermore, the H-COF shows high porosity, stability, and rich atoms in the linkage. As a result, the work outperforms most of the previous reports in iodine capture with a high capture value at 5.72 g g .

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http://dx.doi.org/10.1002/marc.202200787DOI Listing

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