Room temperature hybridization of amide-linked COF (RT-COF) and Na-mordenite zeolite (MOR) as a potential adsorbent in three-medium iodine capture

Abstract

Generated volatile radionuclides within the nuclear fission process, namely, iodine considered a threat to human safety and cause environmental pollution. Herein, we studied the crystallization of a stable nanoporous hybrid containing a covalent organic framework (COF) and Na-mordenite zeolite, operated as an adsorbent platform for efficient volatile iodine capture towards vapor, organic and aqueous mediums. The room-temperature synthesized hybrid, prepared by ease-operated rapid reaction, possesses a high BET surface area of over 140 m2 g−1, good both crystallinity and thermal stability with high capture of iodine (7.2 g g−1, 78.54 %, and 83.40 % in vapor, aqueous and organic phases, respectively), which was significantly higher than individual hybrid ingredients (Na-MOR and RT-COF). The nanoporous hybrid represented the ability to be recycled three times while maintaining a high uptake capacity. We believe that the applied combination of COF with zeolite will pave the way for the advent of novel impressive adsorbent materials for radioiodine during nuclear waste disposal.