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On the Universality of Capillary Condensation and Adsorption Hysteresis Phenomena in Ordered and Crystalline Mesoporous Materials
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-04-30 , DOI: 10.1002/admi.202000184 Katie Cychosz Struckhoff 1 , Matthias Thommes 2 , Lev Sarkisov 3
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-04-30 , DOI: 10.1002/admi.202000184 Katie Cychosz Struckhoff 1 , Matthias Thommes 2 , Lev Sarkisov 3
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Using adsorption experiments for argon over a wide range of temperatures from above the triple point (i.e., 87 K) down to 65 K, coupled with advanced molecular simulation studies, the underlying mechanism of capillary condensation and hysteresis in a mesoporous metal‐organic framework (MOF), MIL‐101(Cr) is explored. The results obtained on the mesoporous MOFs are compared with the experimental and molecular simulation studies of argon adsorption and phase behavior in mesoporous molecular sieves (e.g., MCM‐41 silica) of similar pore size and over the same temperature range (65–87 K). The studies provide insights into the nature of confinement effects on the adsorption and phase behavior of fluids in mesoporous MOFs. The obtained results suggest that certain features of adsorption, capillary condensation, and associated hysteresis phenomena in mesoporous MOFs and in mesoporous molecular sieves are governed by the same underlying physics, despite the striking differences in pore structure and chemical composition. Hence, the findings are of importance for advancing characterization methodologies based on gas adsorption, but also for predicting the behavior of mesoporous MOFs in various potential applications.
中文翻译：
有序和结晶介孔材料中毛细管冷凝和吸附滞后现象的普遍性
使用从三点以上（即87 K）到65 K的宽温度范围内的氩气吸附实验，再加上先进的分子模拟研究，介孔金属-有机骨架中毛细管缩合和滞后的基本机理（ MOF），MIL-101（Cr）。将在介孔MOF上获得的结果与在类似孔径和相同温度范围（65–87 K）的介孔分子筛（例如MCM-41二氧化硅）中氩吸附和相行为的实验和分子模拟研究进行了比较。这些研究提供了对中孔MOF中流体吸附和相行为的限制作用性质的见解。获得的结果表明，吸附，毛细管冷凝，尽管孔结构和化学组成存在显着差异，但介孔MOF和介孔分子筛中的分子和相关的磁滞现象仍受相同的基础物理控制。因此，这些发现对于推进基于气体吸附的表征方法具有重要意义，而且对于预测介孔MOF在各种潜在应用中的行为也具有重要意义。
更新日期：2020-04-30
中文翻译：
有序和结晶介孔材料中毛细管冷凝和吸附滞后现象的普遍性
使用从三点以上（即87 K）到65 K的宽温度范围内的氩气吸附实验，再加上先进的分子模拟研究，介孔金属-有机骨架中毛细管缩合和滞后的基本机理（ MOF），MIL-101（Cr）。将在介孔MOF上获得的结果与在类似孔径和相同温度范围（65–87 K）的介孔分子筛（例如MCM-41二氧化硅）中氩吸附和相行为的实验和分子模拟研究进行了比较。这些研究提供了对中孔MOF中流体吸附和相行为的限制作用性质的见解。获得的结果表明，吸附，毛细管冷凝，尽管孔结构和化学组成存在显着差异，但介孔MOF和介孔分子筛中的分子和相关的磁滞现象仍受相同的基础物理控制。因此，这些发现对于推进基于气体吸附的表征方法具有重要意义，而且对于预测介孔MOF在各种潜在应用中的行为也具有重要意义。
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