在室温下具有极高二氧化碳存储容量的金属有机框架。

Metal-organic frameworks with exceptionally high capacity for storage of carbon dioxide at room temperature.

作者信息

Millward Andrew R, Yaghi Omar M

机构信息

Materials Design and Discovery Group, Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109-1055, USA.

出版信息

J Am Chem Soc. 2005 Dec 28;127(51):17998-9. doi: 10.1021/ja0570032.

DOI:10.1021/ja0570032

PMID:16366539

Abstract

Metal-organic frameworks (MOFs) show high CO2 storage capacity at room temperature. Gravimetric CO2 isotherms for MOF-2, MOF-505, Cu3(BTC)2, MOF-74, IRMOFs-11, -3, -6, and -1, and MOF-177 are reported up to 42 bar. Type I isotherms are found in all cases except for MOFs based on Zn4O(O2C)6 clusters, which reveal a sigmoidal isotherm (having a step). The various pressures of the isotherm steps correlate with increasing pore size, which indicates potential for gas separations. The amine functionality of the IRMOF-3 pore shows evidence of relatively increased affinity for CO2. Capacities qualitatively scale with surface area and range from 3.2 mmol/g for MOF-2 to 33.5 mmol/g (320 cm3(STP)/cm3, 147 wt %) for MOF-177, the highest CO2 capacity of any porous material reported.

摘要

金属有机框架材料（MOFs）在室温下表现出较高的二氧化碳存储容量。报道了MOF-2、MOF-505、Cu3(BTC)2、MOF-74、IRMOFs-11、-3、-6和-1以及MOF-177在高达42巴压力下的重量法二氧化碳等温线。除了基于Zn4O(O2C)6簇的MOFs呈现出S型等温线（有一个台阶）外，在所有情况下均发现I型等温线。等温线台阶的不同压力与孔径增大相关，这表明其具有气体分离的潜力。IRMOF-3孔的胺官能团显示出对二氧化碳亲和力相对增加的证据。容量与表面积定性相关，范围从MOF-2的3.2 mmol/g到MOF-177的33.5 mmol/g（320 cm3(STP)/cm3，147 wt%），MOF-177是所报道的任何多孔材料中最高的二氧化碳容量。