Carbon dioxide (CO₂) is a main greenhouse gas contributing to global warming issues. Considerable attention has been generated to reduce the atmospheric concentration of CO₂. In the present work, we have prepared series of metal organic framework (MOF) immobilized polyacrylonitrile (PAN) fiber mats with different wt% loading of MOF particles via electrospinning technique. The existence of well-defined framework of MOFs in PAN fibers were confirmed by X-ray diffraction (XRD) and Fourier-transform infrared (FTIR) spectra. The structural properties were analyzed by N₂ sorption isotherms at 77 K showing increased surface area and pore volume with increase in MOF loading. CO₂ adsorption capacities for PAN/ZIF-8 and PAN/HKUST-1mats with 60% loading showed the maximum capacities of 0.55 mmol/g and 2.55 mmol/g respectively at 298 K and 1 bar, which reached to 70% and 80% of capacities for ZIF-8 and HKUST-1 powders. With addition of polyethyleneimine (PEI) in PAN/ZIF-8 (60%) fibers, CO₂ adsorption capacity was significantly increased by 45%, resulting in a large increase in CO₂/N₂ sorption selectivity from 6 to 54.

二氧化碳（CO ₂）是导致全球变暖问题的主要温室气体。为了降低大气中的CO ₂浓度已经引起了极大的关注。在本工作中，我们通过静电纺丝技术制备了一系列具有不同wt％MOF负载量的固定有金属有机骨架（MOF）的聚丙烯腈（PAN）纤维毡。通过X射线衍射（XRD）和傅立叶变换红外（FTIR）光谱证实了PAN纤维中MOF的明确框架的存在。通过在77 K下的N ₂吸附等温线分析结构特性，显示出随着MOF负载的增加，表面积和孔体积增加。一氧化碳₂负载为60％的PAN / ZIF-8和PAN / HKUST-1mats的吸附容量显示在298 K和1 bar下的最大容量分别为0.55 mmol / g和2.55 mmol / g，分别达到容量的70％和80％适用于ZIF-8和HKUST-1粉末。在PAN / ZIF-8（60％）纤维中添加聚乙烯亚胺（PEI）后，CO ₂吸附容量显着增加了45％，从而导致CO ₂ / N ₂吸附选择性从6大幅提高至54。