Development of a simple aqueous solution based chemical method for synthesis of mesoporous γ-alumina powders with disordered pore structure
Development of a simple aqueous solution based chemical method for synthesis of mesoporous γ-alumina powders with disordered pore structure
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DOI：
10.1007/s10934-009-9271-x
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发表时间：
2010-02
影响因子：
2.6
通讯作者：
B. Naik;V. S. Prasad;Narendra Nath Ghosh
中科院分区：
文献类型：
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作者：
B. Naik;V. S. Prasad;Narendra Nath Ghosh
报道了一种技术简单的化学合成介孔γ-氧化铝的方法。以硝酸铝为铝源，合成了具有不同孔结构和表面积的介孔γ-氧化铝。以不同的羧酸（硬脂酸、油酸和乳酸）与过量的三乙醇胺（TEA）作为结构导向剂，以水为溶剂反应合成酸皂模板的超分子液晶相。将前驱体在空气中于 550°C 下煅烧 2 小时，得到介孔氧化铝粉末。采用热重分析、X射线衍射、高分辨率透射电子显微镜、N2吸附-脱附表面积和孔径分析仪对合成的γ-氧化铝粉末进行了表征。孔径和孔的有序性受羧酸链长的影响。合成氧化铝粉末的表面积为 214 至 376 m2/g，平均孔径为 3.3 至 6.5 nm，具体取决于羧酸的链长。
A technically simple chemical method for the synthesis of mesoporous γ-alumina has been reported. Mesoporous γ-aluminas with different pore structure and surface area were synthesized by using aluminium nitrate as a source of aluminum. Supramolecular liquid crystalline phase of acid soap template synthesized via reaction of different carboxylic acids (stearic acid, oliec acid and lactic acid) with excess of triethanolamine (TEA) acts as a structure directing agent and water was used as solvent. Precursors were calcined at 550 °C in air for 2 h to obtain mesoporous alumina powders. Synthesized γ-alumina powders were characterized by using thermogravimetric analysis, X-ray diffraction, high resolution transmission electron microscope and N2adsorption–desorption surface area and pore size analyzer. Pore size and ordering of pores were influenced by the chain length of carboxylic acids. Surface area of synthesized alumina powders varied from 214 to 376 m2/g and average pore diameter from 3.3 to 6.5 nm depending upon the chain length of the carboxylic acid.