Synthesis of Mesoporous γ-alumina Assisted by Room Temperature Ionic Liquid

Boehmite Sols were used as aluminum precursors for preparing mesoporous alumina with crystalline framework walls in the presence of 1-butyl-3-methyl imidazolium tetrafluoroborate ((BMIM)(BF4)). The structure of the γ-Al2O3 was examined by N2 physical adsorption, X-ray powder diffraction (XRD), transmission electron microscope (TEM), and solid state 27 Al MAS NMR spectra. The results show that alumina with the three- dimensional interconnected scaffold-like channels displays very rich porosities with large mesopores, and the addi- tion of (BMIM)(BF4) could improve the pore properties of alumina significantly.