A novel combining strategy of cellulose aerogel and hierarchically porous metal organic frameworks (HP-MOFs) to improve the CO2 absorption performance

High CO2 concentration in atmosphere causes serious environmental issues, and carbon capture storage technologies have attracted attention as a means to reduce the atmospheric concentration. Metal-organic frameworks (MOFs) can potentially be used for adsorption, but their poor stability microporosity limit applications. Herein, novel strategy was proposed combine cellulose aerogel hierarchically-porous MOFs (HP-MOFs) with larger pores. According this strategy, series of microcrystalline cellulose/HP-UIO-66-NH2 hybrid aerogels (MC-HUN-X) constructed by adding modulator (monocarboxylic acid, MA), followed in-situ growth HP-UIO-66-NH2 on aerogel. By adjusting chain length MA, structure–function relationship between pore size adsorption capacity MC-HUN-X explored. The results showed that increased first then decreased upon increasing size, while selectivity continuously increased. Among all samples, MC-HUN-4 moderate had highest (1.90 mmol/g at 298 K 1 bar) (13.02 2.40 CO2/N2 CO2/CH4). combination endowed excellent mechanical reusability. Cellulose/HP-UIO-66-NH2 aperture sizes MOF CO2, could effectively improve