Synthesis and Characterization of Wormhole-like Mesoporous γ-Al₂O₃

To obtain high-surface-area porous γ-Al₂O₃,the alco-hydrothermal method was adopted to synthesize plate-shaped wormhole-like mesoporous γ-Al₂O₃ particles with a face-centered cubic crystal structure,and characterized the physical properties of these materials by means of the X-ray diffraction,N₂ adsorption-desorption,scanning electron microscopy,transmission electron microscopy,and selected area electron diffraction techniques.It has been shown that mesoporous γ-Al₂O₃ particles with the wormhole-like morphology and good crystalinity can be fabricated with aluminum tri-sec-butoxide as the aluminum source,1-propanol aqueous solution as the solvent,and laurie acid as the template (the mass ratio of aluminum tri-secbutoxide to lauric acid=4:1).The surface area of the Al₂O₃ sample obtained at 600℃calcination was up to 306 m²/g and its average pore diameter was ca.5 nm.