Several notes on the melting behavior of mesoporous materials
In this paper, the melting temperature dependence on geometric characteristics (volume and shape) of pores distributed in the mesoporous material has been analyzed. The pore geometry has been determined in the framework of the fractal-geometry approach using the values of their effective diameter an...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Tver State University
2024-12-01
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| Series: | Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов |
| Subjects: | |
| Online Access: | https://physchemaspects.ru/2024/doi-10-26456-pcascnn-2024-16-427/?lang=en |
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| Summary: | In this paper, the melting temperature dependence on geometric characteristics (volume and shape) of pores distributed in the mesoporous material has been analyzed. The pore geometry has been determined in the framework of the fractal-geometry approach using the values of their effective diameter and fractal dimension. The obtained results demonstrate that the well-known effect (being characteristic of nanoscale particles), which consists in a significant dependence of the melting temperature on the size and shape of a particle, can also be realized in mesoporous materials (the pore size being from 5 up to 50 nm) while the mesoporous materials themselves can be of macroscopic dimensions. Using the example of mesoporous lead, it has been shown the reducing the pore size and «complicating» the pore shape result in a significant decrease in the melting temperature of a material. The results have been obtained using the cohesive energy-based model, being verified experimentally for lead nanoparticles. |
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| ISSN: | 2226-4442 2658-4360 |