Abstract Chitosan nanofibers are promising template for development of metal organic frameworks (MOFs) nanofibrous membranes because of their high surface area with abundance of functional groups for cationic/anionic binding. In this study, Cu-BTC-integrated chitosan/PVA nanofibrous membrane (Cu-BTC/CNFs) hybrids are successfully prepared by layer-by-layer depositing Cu2+ as metal cluster and BTC as organic precursor to form Cu-BTC MOF particles on the nanofiber surface. Our study shows that the specific surface area and pore size distribution of the Cu-BTC/CNFs can be controlled by changing the order of precursors mixing. By immersing chitosan/PVA nanofibrous membranes (CNFs) in the metal solution prior to the organic solution, the CNFs/Cu/BTC-3 shows an improvement of ~11 times for the specific surface area, compared to the neat CNFs and development of the micropores in the range of 0.6–0.8 nm. The CNFs/Cu/BTC-3 with adsorption capacity of CO2/N2 over 14 times has a great potential for selective CO2 capturing and filtration.

中文翻译：

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来自绿色工艺的金属有机框架集成壳聚糖/聚乙烯醇 (PVA) 纳米纤维膜混合物，用于选择性 CO2 捕获和过滤

摘要 壳聚糖纳米纤维具有高表面积和丰富的阳离子/阴离子结合官能团，是开发金属有机骨架 (MOF) 纳米纤维膜的有前途的模板。在这项研究中，通过逐层沉积 Cu2+ 作为金属簇和 BTC 作为有机前驱体，在表面形成 Cu-BTC MOF 颗粒，成功制备了 Cu-BTC 集成壳聚糖/PVA 纳米纤维膜（Cu-BTC/CNFs）杂化物纳米纤维表面。我们的研究表明，可以通过改变前体混合的顺序来控制 Cu-BTC/CNF 的比表面积和孔径分布。通过在有机溶液之前将壳聚糖/PVA 纳米纤维膜 (CNFs) 浸入金属溶液中，CNFs/Cu/BTC-3 的比表面积提高了约 11 倍，与纯 CNF 和微孔在 0.6-0.8 nm 范围内的发展相比。CNFs/Cu/BTC-3 对 CO2/N2 的吸附能力超过 14 倍，在选择性捕获和过滤 CO2 方面具有巨大潜力。