液相反应条件下,以薄姆石溶胶为铝源, 室温离子液体1-甲基-3-丁基咪唑四氟硼酸盐([BMIM][BF4])存在下制备了晶态结构 中孔 γ-Al2O3. 采用N2物理吸附,X射线衍射, 透射电子显微镜,27Al魔角固体核磁共振对所制备的样品进行了结构表征.结果表明通过调节[BMIM][BF4]的用量,得到了孔道结构呈脚手架状、比表面积较大、平均孔径在12nm左右、孔容在1.0cm3/g以上,孔径分布较宽的介孔氧化铝; [BMIM][BF4]加入能够明显改善氧化铝的孔道结构.
Boehmite Sols were used as aluminum precursorsfor preparing mesoporous alumina with crystalline framework walls in thepresence of 1-butyl-3-methyl imidazolium tetrafluoroborate ([BMIM][BF4]). T hestructureof theγ-Al2O3 wasexamined by N2 physicaladsorption, X-ray powder diffraction (XRD), transmission electron microscope (TEM), and solidstate 27Al MAS NMR spectra. The results show that aluminawith the three-dimensional interconnected scaffold-like channels displays very richporosities with large mesopores, and the addition of [BMIM][BF4]could improve the pore properties of alumina significantly.
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