Tuning MOF CO2 Adsorption Properties via Cation Exchange

摘要

The pore volume and BET surface area of bio-MOF-1 (a), Zn8(ad)4(BPDC)6O •2Me2NH2, is systematically modified via postsynthetic cation exchange with either tetramethylammonium, tetraethylammonium, or tetrabutylammonium cations to yield Zn8(ad)4(BPDC)6O•2Me4N (b), Zn8(ad)4(BPDC)6O•2Et4N (c), and Zn8(ad)4(BPDC)6O•2Bu4N (d), respectively. The impact that pore volume and BET surface area have on CO2 capacity is evaluated, and it is found that materials with intermediate porosity (b and c) have the largest CO2 capacities under the conditions studied