期刊
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
卷 27, 期 7, 页码 1109-1122出版社
SPRINGER
DOI: 10.1007/s10450-021-00342-8
关键词
Capillary condensation; Scanning hysteresis loop; Ordered mesoporous materials; interconnected mesoporous
资金
- UNSL
- CONICET
- Brazilian CNPq
- CAPES
- Argentinian ANPCyT
The study utilized Ar adsorption-desorption isotherms and scanning hysteresis loops to analyze the connectivity of the porous network in ordered mesoporous materials, with results showing that two mathematical models could be applied to adjust the desorption branches in the loops, associating these results with the connectivity in the porous network and the presence of pore-blocking effects.
The scanning hysteresis loop provides information about the correlation of the pore network, its connectivity and pore size distribution; nonetheless, this correlation cannot be revealed from the complete isotherm. To analyze the connectivity of the porous network in ordered mesoporous materials modified with iron and cobalt oxides, Ar adsorption-desorption isotherms and their corresponding scanning of the hysteresis loops at three temperatures (65, 77, and 87 K) were measured. Two mathematical models based on the independent domains theory (i.e. Uncorrelated Model (UM) and Partial Correlated Model (PCM)) were applied to adjust the desorption branches in the hysteresis loops associating these results to the connectivity in the porous network and the presence of pore-blocking effects.
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