Constructing Stable and Porous Covalent Organic Frameworks for Efficient Iodine Vapor Capture
Lipeng Zhai1, Diandian Han1, Jinhuan Dong2
1Henan Key Laboratory of Functional Salt Materials, Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou, 450007, P. R. China.
Macromolecular Rapid Communications
|May 29, 2021
Summary
New covalent organic frameworks (COFs) demonstrate high stability and porosity for effective iodine removal. These materials offer ultrahigh capacity and excellent recyclability, crucial for managing radioactive iodine in nuclear waste.
Area of Science:
- Materials Science
- Chemistry
- Environmental Science
Background:
- Covalent organic frameworks (COFs) are crystalline polymers with tunable properties.
- High stability and porosity are essential for COF applications.
- Radioactive iodine poses environmental and health risks.
Purpose of the Study:
- To design and synthesize novel COFs for radioactive iodine removal.
- To evaluate the stability, porosity, and iodine capture capacity of the new COFs.
Main Methods:
- Synthesis of TTA-TMTA-COF and TTA-FMTA-COF by integrating methoxy functional groups.
- Characterization of COF properties, including surface area, pore volume, and chemical stability.
- Testing COFs for iodine capture capacity and recyclability.
Main Results:
- Two new COFs, TTA-TMTA-COF and TTA-FMTA-COF, were successfully synthesized.
- Both COFs exhibit high surface area, large pore volume, and excellent chemical stability.
- TTA-FMTA-COF achieved an iodine capture capacity of 5.07 g g⁻¹, with no loss of capacity after five cycles.
Conclusions:
- The developed COFs show significant potential for radioactive iodine capture.
- TTA-FMTA-COF demonstrates ultrahigh capacity and excellent recyclability for iodine removal.
- These findings contribute to safer management of nuclear waste.
