A gel-derived mesoporous silica reference material for surface analysis by gas sorption - 1. Textural features
A gel-derived mesoporous silica reference material for surface analysis by gas sorption - 1. Textural features
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DOI：
10.1016/s0272-8842(99)00037-1
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发表时间：
2000-01-01
影响因子：
5.2
通讯作者：
Hench, LL
中科院分区：
文献类型：
--
作者：
Coleman, NJ;Hench, LL
目前对需要精心定制结构的单片介孔矩阵的兴趣决定了对新一代用于纹理分析的标准材料的需求。因此，用氮气吸附法研究了介孔凝胶衍生硅胶整体体的结构特性。比表面积(165.5 +/- 1.5 m（2) g(-1)）、比孔容(0.986 +/- 0.020 cm（3) g(-1)）、平均孔径（119.2 +/- 2.7埃）及其分布。发现介孔二氧化硅的性能与商业上可用于BET表面积和孔径分析的认证标准物质相比较有利。在这种应用中，凝胶-硅整体的主要优点是消除了与粉末取样相关的误差。(C) 2000 Elsevier Science Ltd and Techna S.r.l版权所有
Current interest in monolithic mesoporous matrices requiring carefully tailored architectures has dictated the requirement for a new generation of standard materials for textural analysis. Accordingly, the textural characteristics of a mesoporous gel-derived silica monolith have been investigated by nitrogen sorption. Specific surface area (165.5 +/- 1.5 m(2) g(-1)), specific pore volume (0.986 +/- 0.020 cm(3) g(-1)), average pore size (119.2 +/- 2.7 Angstrom) and distribution are reported. The properties of the mesoporous silica were found to compare favourably with those of commercially available certified reference materials for BET surface area and pore size analysis. The primary advantage of the gel-silica monolith in this application is the elimination of errors associated with powder sampling. (C) 2000 Elsevier Science Ltd and Techna S.r.l. All rights reserved.