Morphology Controllable Synthesis of γ-Alumina Nanostructures via an Ionic Liquid-Assisted Hydrothermal Route

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• 作者：Tongil Kim ; Jiabiao Lian ; Jianmin Ma ; Xiaochuan Duan ; Wenjun Zheng
• 刊名：Crystal Growth & Design
• 出版年：2010
• 出版时间：July 7, 2010
• 年：2010
• 卷：10
• 期：7
• 页码：2928-2933
• 全文大小：895K
• 年卷期：v.10,no.7(July 7, 2010)
• ISSN：1528-7505

文摘

The precursors for boehmite and γ-Al₂O₃, aluminum acetate hydroxide [(CH₃COO)₂Al(OH)] with various morphologies including nanoleave, nanofibers, and hierarchically nanostructured microflowers, have been successfully synthesized by an ionic liquid-assisted hydrothermal synthetic method using 1-butyl-2, 3-dimethyl imidazollium chloride ([bdmim][Cl]) as a template. The effects of the ionic liquid [bdmim][Cl] on the morphology of the precursors aluminum acetate hydroxide have been investigated systematically. The boehmite and γ-Al₂O₃ nanostructures were obtained by calcining the as-synthesized precursors at 300 and 600 °C for 2 h, respectively, preserving the same morphology. The proposed formation mechanism of the precursors has also been investigated. The obtained products were characterized by several techniques, such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N₂ adsorption−desorption technique.