Gram-scale green synthesis of a highly stable cationic covalent organic framework for efficient and selective removal of ReO /TcO.

Covalent organic frameworks (COFs) have developed as efficient and selective adsorbents to mitigate TcO contamination. However, the eco-friendly and scalable production of COF-based adsorbents for the removal of TcO has not yet been reported. This study explores the potential of a cationic COF (TpDB-COF) synthesized a green hydrothermal method, achieving gram-scale yields per batch, thereby addressing a significant limitation of existing COF production methods.