| 초록 |
Due to the increasing concerns about global warming, global energy demand is shifting from a carbon-based energy source to an environmentally friendly carbon-free energy source. Among carbon-free energy sources, hydrogen (H2) is a promising energy source by its clean and high energy content. Therefore, the purification of H2 is important for its utilization. Herein, we have fabricated a composite membrane with high H2/CO2 selectivity and permeability by intercalating CO2 affinity polyethylene oxide (PEO) into H2 permeable nanoporous graphene (NG). The composite was prepared by immersing liquid crystal like graphene oxide (GO) membrane into PEO solution followed by hot-pressing to control d-spacing, activate nanopore, and convert GO into multilayer NG. The membrane exhibited high gas permeability of 32238 barrer while showing high H2/CO2 selectivity of 25 ± 2.99 surpassing polymer permeability-selectivity upper-bound. |
