Relationship between pore volumes and surface areas derived from the evaluation of N2-sorption data by DR-, BET- and t-plot
Relationship between pore volumes and surface areas derived from the evaluation of N2-sorption data by DR-, BET- and t-plot
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DOI：
10.1016/j.micromeso.2010.03.034
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发表时间：
2010-08
影响因子：
5.2
通讯作者：
C. Scherdel;G. Reichenauer;M. Wiener
中科院分区：
文献类型：
--
作者：
C. Scherdel;G. Reichenauer;M. Wiener
分析吸附等温线的三种最常见的方法分别是：Brunauer-Emmett-Teller（BET）理论，建立了介孔和大孔材料的比表面积，t-图法，将吸附与多层吸附分离，以及基于Dubinin和Radushkevich（DR）工作的吸附分析。虽然BET-分析被认为是敏感的多层吸附的外表面积，DR-方法预计将特别敏感的微孔。然而，一系列的合成碳的研究数据表明，这两种方法得出的值是等效的，尽管不同的基本假设。
Three of the most common methods to analyze sorption isotherms with respect to micropore volume and specific surface, respectively, are the Brunauer–Emmett–Teller (BET) theory, established for the specific surface area of meso- and macroporous materials, the t-plot-method, which separates micropore from multilayer adsorption and the micropore analysis based on the work of Dubinin and Radushkevich (DR). While BET-analysis is assumed to be sensitive to multilayer adsorption on the external surface area, the DR-method is expected to be in particular sensitive to the micropores. However, the data for a series of synthetic carbons investigated reveal that the values derived by both methods are equivalent, despite the different underlying assumptions.