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六棱柱状多晶γ-Al2O3的制备、表征及其形成机制研究

刘冬梅 ,  马波 ,  杨卫亚 ,  凌凤香 ,  沈智奇 ,  王少军 ,  孙万付 ,  赵小雪

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引用本文: 刘冬梅, 马波, 杨卫亚, 凌凤香, 沈智奇, 王少军, 孙万付, 赵小雪. 六棱柱状多晶γ-Al2O3的制备、表征及其形成机制研究[J]. 燃料化学学报, 2013, 41(10): 1262-1267. shu
Citation:  LIU Dong-mei, MA Bo, YANG Wei-ya, LING Feng-xiang, SHEN Zhi-qi, WANG Shao-jun, SUN Wan-fu, ZHAO Xiao-xue. Synthesis, characterization and formation mechanism of hexagonal prism polycrystalline γ-Al2O3[J]. Journal of Fuel Chemistry and Technology, 2013, 41(10): 1262-1267. shu

六棱柱状多晶γ-Al2O3的制备、表征及其形成机制研究

    通讯作者: 凌凤香(1966-),女,教授级高工,博士,研究方向:从事分析表征及催化剂基础研究工作,E-mail:lingfengxiang.fshy@sinopec.com,Tel:024-56389578。
  • 基金项目:

    中国石油化工股份有限公司资助(112097)。 (112097)

摘要: 以AlCl3·6H2O为前驱物,在氨水介质中用水热法制备了具有新颖形貌特征的六棱柱状多晶γ-Al2O3颗粒。采用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)及N2物理吸脱附等方法对所制备的γ-Al2O3颗粒进行了表征,并对其形貌形成机制进行了分析。结果表明,铝前驱物在氨水介质中通过水热处理后,经焙烧可以形成形貌规整的六棱柱状γ-Al2O3颗粒,其边长与长度分别约为0.3 μm和2.5 μm。TEM图片显示,六棱柱颗粒是由尺寸在10 nm左右的粒子聚集而成,因而具有多晶γ相特征。所制备的γ-Al2O3材料具有发达的孔隙结构,比表面积为274 cm2/g,孔容为0.51 cm3/g,孔径集中分布在5.5 nm周围。研究发现,γ-Al2O3六棱柱形貌的形成机制与AlOOH二次粒子在NH4+正电荷作用下发生的最稳态排列形式具有密切的关联。

English

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  • 收稿日期:  2013-04-11
  • 网络出版日期:  2013-06-23
通讯作者: 陈斌, bchen63@163.com
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