离子改性的 CON 材料用于吸附分离 NF₃

Adsorptive separation of NF₃ from semiconductor exhaust gases has become an increasingly important topic in industrial applications. By introducing iodine ions into cage-like organic network (CON), quaternized I-CON material was prepared. The DFT calculation revealed that the electric field was formed on the pore surface by introducing iodide ions, which enhanced the inducing force between NF₃ molecule and I-CON framework. Compared with CON, the NF₃ adsorption capacity of I-CON increased from 30.49mL/g to 45.13mL/g and the IAST selectivity increased from 10.59—15.49 to 15.01—19.47 according to the single-component gas adsorption results. Moreover, the dynamic adsorption selectivity of I-CON was also higher than that of CON in the breakthrough tests. Thus, separation ability of CON could be effectively improved by ion modification, showing its potential for the real-world NF₃ capture and enrichment.