Highly Efficient Iodine Capture and CO2 Adsorption using a Triazine-Based Conjugated Microporous Polymers

Triazine-based conjugated microporous polymers (CMPs) are a class of promising materials for adsorptive separation of CO2, which could be an effective alternative to chemisorption based approaches. Three novel CMPs were synthesized based on mixed building-block approach under ionothermal conditions (ZnCl2, 400 degrees C). CMP@1-3 possess moderate BET surface area of 325-707 m(2) g(-1). These polymers have a permanent porous structure, plenty of nitrogen atoms in the skeletons as effective sorption sites, and display a high adsorption performance for CO2 and iodine. Among them, CMP@3 displays outstanding CO2 adsorption capacity with uptake up to 120.8 cm(3) g(-1) at 1 bar and 273 K. In addition, CMP@3 exhibits a superior iodine uptake up to 308 wt.%. After adsorption and release, the structure of CMPs materials does not change and has high stability, which can be used as a convenient, economic and environmentally friendly material to develop its application in the field of I-2 adsorption.