| 球形SiO2-Al2O3的制备、结构和性能 |
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| 引用本文： | 赵振兴,夏春谷,薛群基,李殿卿,刘鹏程. 球形SiO2-Al2O3的制备、结构和性能[J]. 物理化学学报, 2007, 23(4): 549-553. DOI: 10.3866/PKU.WHXB20070419 |
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| 作者姓名： | 赵振兴 夏春谷 薛群基 李殿卿 刘鹏程 |
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| 作者单位： | Lanzhou Institute of Chemical and Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China; State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China |
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| 摘 要： | 将Na2SiO3·9H2O 溶液通过强酸性阳离子树脂进行离子交换得到酸性硅溶胶,再将硅溶胶与铝溶胶及六次甲基四胺混合后采用油柱成型法制备了球形SiO2-Al2O3复合氧化物. 通过XRD、BET 及TPD等手段对样品进行测试和表征, 结果表明, 600 ℃焙烧得到的SiO2-Al2O3中SiO2以无定型形式存在, 其比表面、孔容与表面酸性随SiO2含量的增加而提高, 孔径、堆密度随SiO2含量的提高而减小, 压碎强度基本保持不变.
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| 关 键 词： | 球形SiO2-Al2O3复合物 油柱成型法 无定型 结构与性能 |
| 收稿时间： | 2006-10-25 |
| 修稿时间： | 2006-10-25 |
Preparation, Structure and Properties of Spherical SiO2-Al2O3 Composites |
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| ZHAO Zhen-Xing,XIA Chun-Gu,XUE Qun-Ji,LI Dian-Qing,LIU Peng-Cheng. Preparation, Structure and Properties of Spherical SiO2-Al2O3 Composites[J]. Acta Physico-Chimica Sinica, 2007, 23(4): 549-553. DOI: 10.3866/PKU.WHXB20070419 |
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| Authors: | ZHAO Zhen-Xing XIA Chun-Gu XUE Qun-Ji LI Dian-Qing LIU Peng-Cheng |
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| Affiliation: | Lanzhou Institute of Chemical and Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China; State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China |
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| Abstract: | Acidic silicon sol was prepared by ion exchange using Na2SiO3·9H2O as raw material. Spherical SiO2-Al2O3 composites were prepared by oil-drop method after mixing of silicon sol, hexamethylenetetramine, and aluminium sol. The samples were characterized and analysized by XRD, BET, and TPD. The results showed that SiO2 existed in SiO2-Al2O3 composites in amorphous phase and that specific surface area, pore volume, and surface acidity increase with the increase of SiO2 content, accompanied with the decrease of average pore diameter and bulk density. The crash strength kept approximate constant. |
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| Keywords: | Spherical SiO_2-Al_2O_3 composite Oil-drop method Armorphous phase Structure and property |
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