A microporous dysprosium-based MOF for selective CO2 capture at ambient temperature

A new microporous dysprosium-based metal-organic framework, {[Dy(BTC)(H2O)](NMF)2(H2O)}n (Dy-MOF, H3BTC = 1,3,5-benzenetricarboxylic acid, NMF = N-methyl formamide), was solvothermal synthesized. Gas adsorption studies reveal the CO2 uptake of Dy-MOF reaches to 55.9 cm3 g-1 at 293 K and 1 atm, in contrast to lower than 13.6 cm3 g-1 for CH4, Ar, and N2. Meanwhile, the IAST selectivities (50:50, v/v) of CO2/CH4, CO2/Ar, and CO2/N2 for Dy-MOF are calculated to be 5.1, 26.7 and 24.3, respectively, showing its ability to be a potential candidate for selective CO2 capture at ambient temperature.

Automated summary

A new microporous dysprosium-based metal-organic framework with high CO2 adsorption capacity and selectivity was synthesized. The framework showed a CO2 uptake of 55.9 cm3 g-1 at 293 K and 1 atm, while the uptake for CH4, Ar, and N2 was lower than 13.6 cm3 g-1. The calculated IAST selectivities of CO2/CH4, CO2/Ar, and CO2/N2 were 5.1, 26.7, and 24.3, respectively, indicating the potential of the framework for selective CO2 capture at ambient temperature.