| 单分散SiO2无孔微球比表面积标准物质的研制 |
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| 引用本文： | 张以梅,周倩,陈胜利,董鹏,袁桂梅.单分散SiO2无孔微球比表面积标准物质的研制[J].化工学报,2009,60(5):1327. |
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| 作者姓名： | 张以梅 周倩 陈胜利 董鹏 袁桂梅 |
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| 作者单位： | 中国石油大学重质油国家重点实验室 |
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| 基金项目： | 国家重点基础研究发展计划项目(2006CB932606);;国家自然科学基金项目(50702077)~~ |
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| 摘 要： | 提出一种新型比表面积标准物质的研究思路，即用无孔的单分散SiO2微球作为比表面积标准物质的材料，它的“真实”比表面积可以通过对其粒径的准确测量，用几何的方法计算出来。这种比表面积标准物质的研制首先要进行单分散SiO2微球的批量合成；其次是对SiO2微球进行表面修饰使其表面无孔；再次是对封孔后SiO2微球的特征尺寸（如粒径、密度）进行测定；最后是进行比表面积的计算和BET测定。实验结果表明：经1000℃灼烧 3h可使SiO2微球基本不含微孔。采用BET法测量的BET比表面积比它的理论计算比表面积值大，粒径为1150nm、453nm和269nm的SiO2微球的BET比表面积比它们的理论计算比表面积分别大1.2m2·g-1、 2.0 m2·g-1和3.6 m2·g-1。在这种情况下，计算比表面积值可以作为这类标准物质定值的参考数据。
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| 关 键 词： | 单分散SiO2微球 封孔 BET 比表面积 |
Research and development of specific surface area standard reference materials of nonporous mono-disperse SiO2 spheres |
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| ZHANG Yimei,ZHOU Qian,CHEN Shengli,DONG Peng,YUAN Guimei.Research and development of specific surface area standard reference materials of nonporous mono-disperse SiO2 spheres[J].Journal of Chemical Industry and Engineering(China),2009,60(5):1327. |
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| Authors: | ZHANG Yimei ZHOU Qian CHEN Shengli DONG Peng YUAN Guimei |
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| Affiliation: | State Key Laboratory of Heavy Oil Processing;China University of Petroleum;Beijing 102249;China |
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| Abstract: | A new idea for specific surface area standard reference materials (SRM) which are made of nonporous mono-disperse SiO2 spheres and the true specific surface area can be calculated accurately from their diameters is presented.Firstly,the mono-disperse SiO2 spheres were synthesized in bulk.Secondly,the spheres were modified to make them nonporous.Thirdly,the characteristic dimensions,such as the size,density of the spheres,were determined accurately.Finally,the specific surface areas were measured by using a ... |
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| Keywords: | mono-disperse SiO2 spheres sealing of holes BET specific surface area |
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