浙江大学鲍宗必团队报道了角型阴离子柱撑层状多孔材料中的壳状氙纳米陷阱用于促进Xe/Kr分离。相关研究成果发表在2022年1月7日出版的《德国应用化学》。

Title: Shell-like Xenon Nano-Traps within Angular Anion-Pillared Layered Porous Materials for Boosting Xe/Kr Separation

Author: Fang Zheng, Lidong Guo, Rundao Chen, Lihang Chen, Zhiguo Zhang, Qiwei Yang, Yiwen Yang, Baogen Su, Qilong Ren, Zongbi Bao

Issue&Volume: 2022-01-07

Abstract: Adsorptive separation of xenon (Xe) and krypton (Kr) is a promising technique but remains a daunting challenge since they are atomic gases without dipole or quadruple moments. Herein we report a strategy for fabricating angular anions-pillared materials featuring shell-like Xe nano-traps, which provide a cooperative effect conferred by the pore confinement and multiple specific interactions. The perfect permanent pore channel (4~5 ) of Ni(4-DPDS)2  MO4  (M = Cr, Mo, W) can host Xe atoms efficiently even at ultra-low concentration (400 ppm Xe), showing the second-highest selectivity of 30.2 in Ni(4-DPDS)2  WO4  and the excellent Xe adsorption capacity in Ni(4-DPDS)2CrO4  (15.0 mmol/kg). Crystallography studies and DFT-D calculations revealed the energy favorable binding sites and angular anions enable the synergism between optimal pore size and polar porosity for boosting Xe affinity. Dynamic breakthrough experiments demonstrated three MOFs as efficient adsorbents for Xe/Kr separation.

DOI: 10.1002/anie.202116686

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202116686