Loading of polyaniline onto MOF (MIL-101) and CO2 adsorption with pANI@MIL-101
Dong Kyu Yoo, Sung Hwa Jhung*
Recently, capture of CO2 after combustion is very important to mitigate the global warming due to increase of CO2 concentration in atmosphere. Well-known metal-organic framework (MOF), MIL-101 was modified to introduce polyaniline. pANI@MIL-101 with suitable pANI concentration (5 mmol), showed highly increased adsorption capacity for CO2, especially at low pressure of 0.15 atm, even though the porosity of MIL-101 was decreased upon pANI loading. Moreover, the new adsorbent showed increased selectivity for CO2, compared with N2 adsorption. The observed favorable adsorption of CO2 on the pANI@MIL-101 might be due to active –NH species on polyaniline. The results indicate that pANI@MIL-101 can be used as an effective adsorbent for CO2 capture from flue gas.