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On the Comparative Analysis of Different Phase Coexistences in Mesoporous Materials

التفاصيل البيبلوغرافية
العنوان: On the Comparative Analysis of Different Phase Coexistences in Mesoporous Materials
المؤلفون: Henry R. N. B. Enninful, Dirk Enke, Rustem Valiullin
المصدر: Materials, Vol 15, Iss 7, p 2350 (2022)
بيانات النشر: MDPI AG, 2022.
سنة النشر: 2022
المجموعة: LCC:Technology
LCC:Electrical engineering. Electronics. Nuclear engineering
LCC:Engineering (General). Civil engineering (General)
LCC:Microscopy
LCC:Descriptive and experimental mechanics
مصطلحات موضوعية: porous solids, phase equilibria, nitrogen sorption, NMR cryoporometry, thermoporometry, mercury porosimetry, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85
الوصف: Alterations of fluid phase transitions in porous materials are conventionally employed for the characterization of mesoporous solids. In the first approximation, this may be based on the application of the Kelvin equation for gas–liquid and the Gibbs–Thomson equation for solid–liquid phase equilibria for obtaining pore size distributions. Herein, we provide a comparative analysis of different phase coexistences measured in mesoporous silica solids with different pore sizes and morphology. Instead of comparing the resulting pore size distributions, we rather compare the transitions directly by using a common coordinate for varying the experiment’s thermodynamic parameters based on the two equations mentioned. Both phase transitions in these coordinates produce comparable results for mesoporous solids of relatively large pore sizes. In contrast, marked differences are found for materials with smaller pore sizes. This illuminates the fact that, with reducing confinement sizes, thermodynamic fluctuations become increasingly important and different for different equilibria considered. In addition, we show that in the coordinate used for analysis, mercury intrusion matches perfectly with desorption and freezing transitions.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1996-1944
Relation: https://www.mdpi.com/1996-1944/15/7/2350; https://doaj.org/toc/1996-1944
DOI: 10.3390/ma15072350
URL الوصول: https://doaj.org/article/1d070bd2c5e844c9ae670f0528ee4fca
رقم الأكسشن: edsdoj.1d070bd2c5e844c9ae670f0528ee4fca
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:19961944
DOI:10.3390/ma15072350