Highly Efficient Iodine Capture and CO ₂ Adsorption using a Triazine‐Based Conjugated Microporous Polymers

Abstract

Abstract Triazine‐based conjugated microporous polymers (CMPs) are a class of promising materials for adsorptive separation of CO 2 , which could be an effective alternative to chemisorption based approaches. Three novel CMPs were synthesized based on mixed building‐block approach under ionothermal conditions (ZnCl 2 , 400 °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 CO 2 and iodine. Among them, CMP@3 displays outstanding CO 2 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.