Imidazolium bromide-based ionic liquids bearing phosphonyl groups on the cationic part were synthesized and grafted on γ-alumina (γ-Al 2 O 3 ) powders. These powders were prepared as companion samples of conventional mesoporous γ-alumina membranes, in order to favor a possible transfer of the results to supported membrane materials, which could be used for CO 2 separation applications. Effective grafting was demonstrated using energy dispersive X-ray spectrometry (EDX), N 2 adsorption measurements, fourier transform infrared spectroscopy (FTIR), and special attention was paid to 31 P and 13 C solid state nuclear magnetic resonance spectroscopy (NMR).
- Hybrid membrane
- Imidazolium-based ionic liquids
- Phosphonate coupling agent
- Solid state NMR