武汉大学汪成团队报道了一种用于甲烷吸附的超高表面积共价有机框架。相关研究成果于2024年11月8日发表在国际知名学术期刊《科学》。

开发具有超高表面积的多孔材料用于气体储存（例如甲烷），是有吸引力但具有挑战性的。

该文中，研究人员报告了两种具有罕见自链接alb-3,6-Ccc2拓扑结构，和1.1纳米孔径的同构三维共价有机框架（COFs）。值得注意的是，这些亚胺连接的微孔COFs显示出，高重量Brunauer-Emmett-Teller（BET）表面积（~4400平方米/克）和体积BET表面积（~1900平方米/立方厘米）。

此外，在100bar和298K下，它们的体积甲烷吸收量高达每立方厘米264cm³/cm³（标准温度和压力）[cm³（STP）cm^3]，在所有报告的多孔晶体材料中，它们在5至100bar和298K下的体积工作容量最高，为237cm³（STP）cm³。

附：英文原文

Title: Ultrahigh–surface area covalent organic frameworks for methane adsorption

Author: Ying Yin, Ya Zhang, Xu Zhou, Bo Gui, Wenqi Wang, Wentao Jiang, Yue-Biao Zhang, Junliang Sun, Cheng Wang

Issue&Volume: 2024-11-08

Abstract: Developing porous materials with ultrahigh surface areas for gas storage (for example, methane) is attractive but challenging. Here, we report two isostructural three-dimensional covalent organic frameworks (COFs) with a rare self-catenated alb-3,6-Ccc2 topology and a pore size of 1.1 nanometer. Notably, these imine-linked microporous COFs show both high gravimetric Brunauer–Emmett–Teller (BET) surface areas (~4400 square meters per gram) and volumetric BET surface areas (~1900 square meters per cubic centimeter). Moreover, their volumetric methane uptake reaches up to 264 cubic centimeter (standard temperature and pressure) per cubic centimeter [cm3 (STP) cm3] at 100 bar and 298 kelvin, and they exhibit the highest volumetric working capacity of 237 cm3 (STP) cm3 at 5 to 100 bar and 298 kelvin among all reported porous crystalline materials.

DOI: adr0936

Source: https://www.science.org/doi/10.1126/science.adr0936