Highly Conjugated Two-dimensional Covalent Organic Frameworks for Efficient Iodine Uptake

Radioactive iodine in nuclear waste would be harmful to nature and human health. The design of adsorbents for iodine capture with high efficiency still remains a challenge. Herein, two highly conjugated two-dimensional covalent organic frameworks (TFPB-BPTA-COF and TFPB-PyTTA-COF) have been successfully constructed. Both COFs possess high porosity, stability, and a high pi-conjugated framework. Impressively, TFPB-PyTTA-COF exhibits an excellent iodine uptake value of up to 5.6 g g(-1), which is superior to most reported COF-based adsorbents for iodine capture.

Automated summary

In this study, two highly conjugated two-dimensional covalent organic frameworks were successfully constructed for efficient capture of radioactive iodine in nuclear waste. Both COFs showed high porosity, stability, and a high pi-conjugated framework. Impressively, TFPB-PyTTA-COF exhibited an excellent iodine uptake value of up to 5.6 g g(-1), surpassing most reported COF-based adsorbents for iodine capture.