Hyperporous Carbon from Triptycene-Based Hypercrosslinked Polymer for Iodine Capture

Considering the nuclear fuel reprocessing conditions at 75 degrees C and the oxidizability of iodine, thermal and chemical stabilities are especially important for porous materials to enrich iodine. However, most organic or metal coordinated porous materials hardly meet this long-term demand. Here, highly porous carbon is prepared from pyrolysis at high temperature using triptycene-based hypercrosslinked polymer as precursor, and possesses high Brunauer-Emmett-Teller (BET) surface area of 3125 m(2) g(-1) and pore volume of 1.60 cm(3) g(-1), and exhibits excellent iodine uptake ability of 340 wt% at 75 degrees C. Moreover, the obtained hyperporous carbon also displays remarkable capture efficiency of iodine from water with the maximum adsorption capacity of 926 mg g(-1). With the characteristics of easy preparation and good chemical and thermal stabilities, the hyperporous carbon may be an ideal adsorbent in iodine capture.