Ionic Liquid Selectively Facilitates CO2 Transport through Graphene Oxide Membrane

Membrane separation of CO₂ from H₂, N₂, or CH₄ has economic benefits. However, the trade-off between selectivity and permanence in membrane separation is challenging. Here, we prepared a high-performance CO₂-philic membrane by confining the [BMIM][BF₄] ionic liquid to the nanochannels in a laminated graphene oxide membrane. Nanoconfinement causes the [BMIM][BF₄] cations and anions to stratify. The layered anions facilitate CO₂ transportation with a permeance of 68.5 GPU. The CO₂/H₂, CO₂/CH₄, and CO₂/N₂ selectivities are 24, 234, and 382, respectively, which are up to 7 times higher than that of GO-based membranes and superior to the 2008 Robeson upper bound. Additionally, the resultant membrane has a high-temperature resistance, long-term durability, and high-pressure stability, indicating its great potential for CO₂ separation applications. Nanoconfining an ionic liquid into the two-dimensional nanochannels of a laminated membrane is a promising gas separation method and a nice system for investigating ionic liquid behavior in nanoconfined environments.

Double-shelled hollow mesoporous silica nanospheres as an acid–base bifunctional catalyst for cascade reactions

Double-shelled hollow mesoporous silica nanospheres as an acid–base bifunctional catalyst for cascade reactions.

Ammonia capture from the gas phase by encapsulated ionic liquids (ENILs)

Encapsulated ionic liquids (ENILs) based on carbonaceous submicrocapsules were designed, synthesized and applied to the sorption of NH₃ from gas streams.

Green synthesis of polyureas from CO2 and diamines with a functional ionic liquid as the catalyst

The synthesis of polyureas from CO₂ and diamines with a functional ionic liquid as the catalyst.