Type III Porous Liquids Based on MOF-Derived Carbon for CO<sub>2</sub> Capture
Haosheng Ma, Xiaoqian Ju, Baolu Cui, Shuqian Meng, Yuxi Liu, Junjie Li, Dechao Wang, Zhiyuan Yang
Abstract
Type III porous liquids (T3PLs), which combine the benefits of solids and liquids, have gained attention for CO 2 emission reduction and sustainable development. A key challenge is maintaining porosity by using small-pore-sized pore generators while avoiding the loss of porosity during dispersion in solvents. Traditional methods require complex postsynthetic modifications, which can compromise structural integrity and stability. In this study, MOF-5 with varying particle sizes was used as a carbon precursor to examine the impact of the particle size on metal–organic framework (MOF)-derived carbons. MCMOF-5, with an internal cubic cavity and a surface-dense graphene layer, was dispersed in poly(dimethylsiloxane) (PDMS) to prepare the T3PLs. MCM-410-3%, formed by MCMOF-5 and PDMS410, exhibited excellent CO 2 sorption (1.89 mmol/g at 10.0 bar, 298 K) and cyclic stability, benefiting from well-developed carbon pores and protective graphite layers. Additionally, it maintains a low viscosity (108 mPa·s) and low density (0.551 g/cm 3 ). This simple strategy of enhancing porous solid interfaces through calcination offers a new approach to the preparation of T3PLs and provides a new option for the use of CO 2 capture materials.