On the Comparative Analysis of Different Phase Coexistences in Mesoporous Materials
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 equilibri...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-03-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/7/2350 |
| _version_ | 1797438710053076992 |
|---|---|
| author | Henry R. N. B. Enninful Dirk Enke Rustem Valiullin |
| author_facet | Henry R. N. B. Enninful Dirk Enke Rustem Valiullin |
| author_sort | Henry R. N. B. Enninful |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-09T11:41:00Z |
| format | Article |
| id | doaj.art-1d070bd2c5e844c9ae670f0528ee4fca |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T11:41:00Z |
| publishDate | 2022-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-1d070bd2c5e844c9ae670f0528ee4fca2023-11-30T23:30:56ZengMDPI AGMaterials1996-19442022-03-01157235010.3390/ma15072350On the Comparative Analysis of Different Phase Coexistences in Mesoporous MaterialsHenry R. N. B. Enninful0Dirk Enke1Rustem Valiullin2Felix Bloch Institute for Solid State Physics, Leipzig University, 04103 Leipzig, GermanyInstitute for Technical Chemistry, Leipzig University, 04103 Leipzig, GermanyFelix Bloch Institute for Solid State Physics, Leipzig University, 04103 Leipzig, GermanyAlterations 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.https://www.mdpi.com/1996-1944/15/7/2350porous solidsphase equilibrianitrogen sorptionNMR cryoporometrythermoporometrymercury porosimetry |
| spellingShingle | Henry R. N. B. Enninful Dirk Enke Rustem Valiullin On the Comparative Analysis of Different Phase Coexistences in Mesoporous Materials Materials porous solids phase equilibria nitrogen sorption NMR cryoporometry thermoporometry mercury porosimetry |
| title | On the Comparative Analysis of Different Phase Coexistences in Mesoporous Materials |
| title_full | On the Comparative Analysis of Different Phase Coexistences in Mesoporous Materials |
| title_fullStr | On the Comparative Analysis of Different Phase Coexistences in Mesoporous Materials |
| title_full_unstemmed | On the Comparative Analysis of Different Phase Coexistences in Mesoporous Materials |
| title_short | On the Comparative Analysis of Different Phase Coexistences in Mesoporous Materials |
| title_sort | on the comparative analysis of different phase coexistences in mesoporous materials |
| topic | porous solids phase equilibria nitrogen sorption NMR cryoporometry thermoporometry mercury porosimetry |
| url | https://www.mdpi.com/1996-1944/15/7/2350 |
| work_keys_str_mv | AT henryrnbenninful onthecomparativeanalysisofdifferentphasecoexistencesinmesoporousmaterials AT dirkenke onthecomparativeanalysisofdifferentphasecoexistencesinmesoporousmaterials AT rustemvaliullin onthecomparativeanalysisofdifferentphasecoexistencesinmesoporousmaterials |