Norbornane-based covalent organic frameworks for gas separation

Abstract

Covalent organic frameworks (COFs) have emerged as a new class of crystalline porous materials with distinct structural features, such as uniform pore distribution, tunable architecture, and modifiable skeletons. COFs hold...

Covalent organic frameworks with triazine units for iodine capture via weak molecular interactions

“…5–7 Besides, the robust organic bonds are commonly employed as linkages to give stable structures. 8–12 Therefore, designable building units have been used as functional skeletons for various applications such as gas uptake, catalyst, chemical sensor, and energy fields. 13–18…”

Improving Lithium–Sulfur Batteries’ Performance via Inverse Vulcanization of Vinylene-Linked Covalent Organic Frameworks

“…Due to the high crystallinity, well-defined one-dimensional pore structures, structural diversity, and high stability, two-dimensional (2D) COFs have attracted tremendous attention and exhibit great potential application in many research fields including gas absorption and separation, − electronic applications, , catalysis, − water treatment, − and energy storage. − A recent investigation demonstrated that COFs could act as an effective sulfur host and provide highly ordered pores for sulfur impregnation, avoiding the volume expansion during the charge–discharge cycling . In addition, introduction of interaction sites for LiPSs on the pore surface can prevent LiPS from shuttling, leading to improvement of the electrochemical performance of LSBs.…”

Pebax and CMC@MXene-Based Mixed Matrix Membrane with High Mechanical Strength for the Highly Efficient Capture of CO2

“…As for the gas separation membrane, maintaining appropriate selectivity while improving permeance has been considered an important consideration for its practical applications. 14,15 However, traditional polymer membrane materials face a trade-off between permeability (permeance) and selectivity, which limits the CO 2 separation efficiency through the membrane processes. 16,17 To overcome the trade-off effect of the conventional onecomponent polymer membranes in permeability (permeance) and selectivity during the separation process, the mixed matrix membranes (MMMs) composed of matrix and fillers have emerged as a state-of-the-art approach to expand the potential applications of traditional polymers in gas separation.…”

“…Compared with the traditional amine-based solvent absorption separation method, membrane separation possessing the low-cost, no phase transition, and environmentally friendly characteristics is extensively adopted to remove CO 2 from gas mixtures. − During the membrane process, the performance of CO 2 separation membranes is usually evaluated by permeance and selectivity. As for the gas separation membrane, maintaining appropriate selectivity while improving permeance has been considered an important consideration for its practical applications. , However, traditional polymer membrane materials face a trade-off between permeability (permeance) and selectivity, which limits the CO 2 separation efficiency through the membrane processes. , …”