首页> 外文会议>3rd International Mesostructured Materials Symposium Jul 8-11, 2002 Jeju, Korea >Chemical coating of the aluminum oxides onto mesoporous silicas by a one-pot grafting method
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Chemical coating of the aluminum oxides onto mesoporous silicas by a one-pot grafting method

机译:通过一锅接枝法将氧化铝化学涂覆到介孔二氧化硅上

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摘要

Using a suitable solvent (such as, 1-propanol) that prevents the self-condensation of aluminum iso-propoxide and extract the quaternary ammonium surfactant out of the nanochannels, a high-coverage aluminum oxide (Al/Si = 0.3-0.5) can be chemically coated onto acid-made mesoporous silica. The aluminum oxide coated mesoporous silica has the both advantages of aluminum oxide (highly hydrothermal stability) and mesoporous materials (large pore size of 2.7 nm, high surface area of around 800 m~2/g, and well-ordered mesostructure). With the well-dispersity, high accessibility and large pore size, the aluminum oxide coated mesoporous silica was supposed to be an acid-catalyst for large molecules.
机译:使用合适的溶剂(例如1-丙醇)可防止异丙醇铝的自凝结并将季铵盐表面活性剂从纳米通道中提取出来,可以得到高覆盖率的氧化铝(Al / Si = 0.3-0.5)将其化学涂覆到酸制的介孔二氧化硅上。氧化铝包覆的介孔二氧化硅同时具有氧化铝(高水热稳定性)和介孔材料(2.7纳米的大孔径,约800 m〜2 / g的高表面积和有序的介孔结构)的优点。由于具有良好的分散性,高可及性和大孔径,氧化铝包覆的介孔二氧化硅被认为是大分子的酸催化剂。

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