Wang Shao-Min, Lan Hao-Ling, Guan Guo-Wei, Yang Qing-Yuan
School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
ACS Appl Mater Interfaces. 2022 Sep 7;14(35):40072-40081. doi: 10.1021/acsami.2c12164. Epub 2022 Aug 24.
The capture and separation of fluorinated gases (F-gases) from N has the potential to not only reduce greenhouse gas emissions but also provide economic benefits for the semiconductor industry. In this work, two Ni-based metal-organic frameworks (MOFs), (Ni(ina), ina = isonicotinic acid) and amine-functionalized (Ni(3-ain), 3-ain = 3-aminoisonicotinic acid), were constructed for capturing F-gases (CF and NF). At ambient conditions, both materials exhibit very high CF sorption capacities (2.92 mmol g for and 2.69 mmol g for -. In addition, exhibited a record selectivity of 46.3 for the CF/N mixture at 298 K and 100 kPa, surpassing all benchmark adsorbents, including (34.7). The kinetic adsorption tests demonstrated that and performed well for CF/N and NF/N mixtures. According to grand canonical Monte Carlo (GCMC) simulations, CF or NF interacts with by multiple van der Waals interactions, resulting in stronger interaction than N. More importantly, dynamic breakthrough experiments verified the practical separation potential of the two materials for CF/N and NF/N mixtures.
从氮气中捕获和分离含氟气体（F气体）不仅有可能减少温室气体排放，还能为半导体行业带来经济效益。在这项工作中，构建了两种镍基金属有机框架材料（MOF），即（Ni(ina)，ina = 异烟酸）和胺官能化的（Ni(3-ain)，3-ain = 3-氨基异烟酸），用于捕获F气体（CF和NF）。在环境条件下，两种材料都表现出非常高的CF吸附容量（对于 为2.92 mmol g，对于 - 为2.69 mmol g）。此外， 在298 K和100 kPa下对CF/N混合物表现出创纪录的46.3的选择性，超过了所有基准吸附剂，包括 （34.7）。动力学吸附测试表明， 和 对CF/N和NF/N混合物表现良好。根据巨正则蒙特卡罗（GCMC）模拟，CF或NF通过多种范德华相互作用与 相互作用，导致其与氮气的相互作用更强。更重要的是，动态突破实验验证了这两种材料对CF/N和NF/N混合物的实际分离潜力。
