Probing Adsorption, Pore Condensation, and Hysteresis Behavior of Pure Fluids in Three-Dimensional Cubic Mesoporous KIT-6 Silica.
Kleitz F, Berube F, Guillet-Nicolas R, Yang CM, Thommes M (2010)
Publication Type: Journal article, Original article
Subtype: other
Publication year: 2010
Journal
Publisher: American Chemical Society
Book Volume: 114
Pages Range: 9344-9355-9355
Journal Issue: 20
DOI: 10.1021/jp909836v
Abstract
To study the details of the process of pore condensation and hysteresis mechanisms in three-dimensional (3-D) pore networks, the authors performed a systematic study of the adsorption and pore condensation behavior of N2 (77.4 K) and Ar (77.4 and 87.3 K) in a 3-dimensional ordered pore system, i.e., cubic Ia3-d mesoporous KIT-6 silica materials with mode pore diams. ranging from ∼5 nm up to 11 nm. KIT-6 silica is a porous material composed of two intertwined mesoporous subnetworks similar as in MCM-48, but this material can be prepd. with much larger mean pore diams. Accurate pore size anal. was performed by x-ray diffraction modeling and by state-of the art application of nonlocal d. functional theory (NLDFT) on N2 (77.4 K) and Ar (87.3 K) sorption data. Also, the data suggest that the width of the adsorption/desorption hysteresis loop obsd. for 3-dimensional KIT-6 silica can be narrower as compared to that of pseudo-one-dimensional SBA-15 silica of the same pore size (i.e., in the pore diam. range from 6 to 8 nm). This specific behavior correlates well with the existence of the highly interconnected 3-dimensional pore network of the KIT-6 material. Also, the results of the studies are also consistent with previous observations that the SBA-15 pore system becomes more and more interconnected with increasing aging temps., i.e., SBA-15 changes from being a material with a pseudo-one-dimensional mesopore system to a material exhibiting a three-dimensional pore system resembling KIT-6 silica. These results provide new insights into the effects of pore interconnectivity on pore condensation and hysteresis behavior in both KIT-6 and SBA-15 silica materials and enable a more thorough understanding of the pore structure and textural properties of these materials. [on SciFinder(R)]
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APA:
Kleitz, F., Berube, F., Guillet-Nicolas, R., Yang, C.-M., & Thommes, M. (2010). Probing Adsorption, Pore Condensation, and Hysteresis Behavior of Pure Fluids in Three-Dimensional Cubic Mesoporous KIT-6 Silica. Journal of Physical Chemistry, 114(20), 9344-9355-9355. https://doi.org/10.1021/jp909836v
MLA:
Kleitz, Freddy, et al. "Probing Adsorption, Pore Condensation, and Hysteresis Behavior of Pure Fluids in Three-Dimensional Cubic Mesoporous KIT-6 Silica." Journal of Physical Chemistry 114.20 (2010): 9344-9355-9355.
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