State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Jiangsu National Synergetic Innovation Centre for Advanced Materials, Nanjing Tech University , Nanjing 210009, China.
ACS Appl Mater Interfaces. 2017 Aug 30;9(34):29093-29100. doi: 10.1021/acsami.7b08032. Epub 2017 Aug 21.
Covalent organic framework (COF) membranes used for selective removal of CO were believed as an efficient and low-cost solution to energy and environmental sustainability. In this study, the amide modified COF nanosheet cluster with a 2D structure was facilely prepared through solid reaction, exhibiting good adsorption-based CO selectivity (223 at 273 K and 90 at 298 K) toward N. Remarkably, the mixed matrix membrane (MMM) that consists of a lesser amount of COF filler (1 wt %) shows promising CO/N gas selectivity (∼64). In addition, the competitive adsorption prompts the selectivity to ∼72 under an equimolar CO/N mixture, which surpasses the values of all reported COF membranes. It is worth to note that the binary gas separation is stable during 120 h.
共价有机框架（COF）膜用于选择性去除 CO 被认为是解决能源和环境可持续性问题的一种高效、低成本的解决方案。在这项研究中，通过固相反 应，简便地制备了具有 2D 结构的酰胺修饰的 COF 纳米片簇，对 N2 表现出良好的吸附基 CO 选择性（273 K 时为 223，298 K 时为 90）。值得注意的是，由少量 COF 填充剂（1wt%）组成的混合基质膜（MMM）表现出有前景的 CO/N 气体选择性（约 64）。此外，在等摩尔 CO/N 混合物下，竞争吸附促使选择性提高到约 72，超过了所有报道的 COF 膜的值。值得注意的是，二元气体分离在 120 h 内是稳定的。
