A new rapid, very simple and one-step sol-gel strategy for the large-scale preparation of highly porous γ-Al2O3 is presented. The resulting mesoporous alumina materials feature high surface areas (400 m2 g−1), large pore volumes (0.8 mL g−1) and the γ-Al2O3 phase is obtained at low temperature (500 °C). The main advantages and drawbacks of different preparations of mesoporous alumina materials exhibiting high specific surface areas and large pore volumes such as surfactant-nanostructured alumina, sol-gel methods and hierarchically macro-/mesoporous alumina monoliths have been analyzed and compared. The most reproducible synthesis of mesoporous alumina are given. Evaporation-Induced Self-Assembly (EISA) is the sole method to lead to nanostructured mesoporous alumina by direct templating, but it is a difficult method to scale-up. Alumina featuring macro- and mesoporosity in monolithic shape is a very promising material for in flow applications; an optimized synthesis is described.
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机译：提出了一种新的快速，简单，一步法溶胶-凝胶策略，用于大规模制备高度多孔的γ-Al2O3。所得的介孔氧化铝材料具有高表面积（400 m 2 g -1 ），大孔体积（0.8 mL g -1 ）和γ-Al2O3相是在低温（500°C）下获得的。分析并比较了具有高比表面积和大孔体积的中孔氧化铝材料的不同制剂的主要优缺点，例如表面活性剂-纳米结构的氧化铝，溶胶-凝胶法和分层的大/中孔氧化铝整料。给出了最可再现的介孔氧化铝合成方法。蒸发诱导自组装（EISA）是通过直接模板制备纳米结构介孔氧化铝的唯一方法，但它是放大规模的困难方法。具有大孔和中孔整体形状的氧化铝是用于流动应用的非常有前途的材料。描述了优化的合成。
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