Enhanced CO2 adsorption on Al-MIL-53 by introducing hydroxyl groups into the framework

Substitution of 25% of terephthalic acid with 2,5-dihydroxyl terephthalic acid in Al-MIL-53 enhances the isosteric heat of CO₂ adsorption remarkably, obtaining a 5.5 wt% CO₂ uptake at 298 K and 0.2 bar.