Issue 10, 2016

Putting an ultrahigh concentration of amine groups into a metal–organic framework for CO2 capture at low pressures

Abstract

Tremendous efforts have been devoted to increasing the CO2 capture performance of porous materials, especially for low CO2 concentration environments. Here, we report that hydrazine can be used as a diamine short enough to functionalize the small-pore metal–organic framework [Mg2(dobdc)] (H4dobdc = 2,5-dihydroxyl-1,4-benzenedicarboxylic acid). By virtue of the ultrahigh concentration of free amine groups (6.01 mmol g−1 or 7.08 mmol cm−3) capable of reversible carbamic acid formation, the new material [Mg2(dobdc)(N2H4)1.8] achieves a series of new records for CO2 capture, such as single-component isotherm uptakes of 3.89 mmol g−1 or 4.58 mmol cm−3 at the atmospheric CO2 concentration of 0.4 mbar at 298 K and 1.04 mmol g−1 or 1.22 mmol cm−3 at 328 K, as well as more than a 4.2 mmol g−1 or 4.9 mmol cm−3 adsorption/desorption working capacity under dynamic mixed-gas conditions with CO2 concentrations similar to those in flue gases and ambient air.

Graphical abstract: Putting an ultrahigh concentration of amine groups into a metal–organic framework for CO2 capture at low pressures

Supplementary files

Article information

Article type
Edge Article
Submitted
23 fev 2016
Accepted
19 iyn 2016
First published
13 iyl 2016
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2016,7, 6528-6533

Putting an ultrahigh concentration of amine groups into a metal–organic framework for CO2 capture at low pressures

P. Liao, X. Chen, S. Liu, X. Li, Y. Xu, M. Tang, Z. Rui, H. Ji, J. Zhang and X. Chen, Chem. Sci., 2016, 7, 6528 DOI: 10.1039/C6SC00836D

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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