Journal ArticleDOI
Characterization of porous solids by NMR.
TLDR
The technique is demonstrated by application to porous silicas and is shown to give pore size distributions comparable to those obtained by the conventional gas desorption method for pore sizes in the range 5 to 50 nm.Abstract:
A new simple and rapid method to determine pore size distributions is described which employs a simple nuclear magnetic resonance (NMR) apparatus. The method exploits the depression of the melting point of a crystalline solid confined within a pore, which is dependent on the pore diameter. The melting point distribution is determined by analyzing the NMR signal as a function of temperature. The technique is demonstrated by application to porous silicas and is shown to give pore size distributions comparable to those obtained by the conventional gas desorption method for pore sizes in the range 5 to 50 nm.read more
Citations
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Journal ArticleDOI
Adsorption — from theory to practice
TL;DR: This review presents in brief the history of adsorption and highlights the progress in theoretical description of the phenomenon under consideration, as well as presenting some of the latest important results and giving a source of up-to-date literature on it.
Journal ArticleDOI
Phase separation in confined systems
TL;DR: A review of the current state of knowledge of phase separation and phase equilibria in porous materials can be found in this article, where the focus is on fundamental studies of simple fluids and well-characterized materials.
Journal ArticleDOI
Physisorption Hysteresis Loops and the Characterization of Nanoporous Materials
TL;DR: In this article, a review of the IUPAC classification of adsorption hysteresis loops is presented, concluding that there is no immediate need to change the classification of physisorption isotherms and hystereis loops and that a carefully regulated application of DFT in place of a classical procedure such as the well-known Barrett-Joyner-Halenda (BJH) method is proposed.
Journal ArticleDOI
Characterization and Analysis of Porosity and Pore Structures
TL;DR: There are a large number of methods for quantifying porosity, and an increasingly complex idea of what it means to do so as discussed by the authors, which is why it is important to quantify the relationships between porosity and storage, transport and rock properties, however, the pore structure must be measured and quantitatively described.
Journal ArticleDOI
Effects of confinement on freezing and melting.
Christiane Alba-Simionesco,Benoit Coasne,Gilberte Dosseh,G. Dudziak,Keith E. Gubbins,Ravi Radhakrishnan,Malgorzata Sliwinska-Bartkowiak +6 more
TL;DR: Both simple and more complex adsorbates that are confined in various environments (slit or cylindrical pores and also disordered porous materials) are considered and how confinement affects the glass transition is addressed.
References
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Journal ArticleDOI
The melting behavior of organic materials confined in porous solids
TL;DR: In this paper, the authors measured the solid-liquid phase transition temperatures and heats of fusion ΔH f of nonpolar organic solids confined in the pores of controlled pore glasses by differential scanning calorimetry.
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LX. On the equilibrium of vapour at a curved surface of liquid
TL;DR: In this article, the equilibrium of vapour at a curved surface of liquid is discussed, where the equilibrium is defined as the point at which the vapour is at a certain point in the surface of the liquid.
Journal ArticleDOI
Geometrical supercooling of liquids in porous glass.
TL;DR: Etude de la surfusion et de la solidification de l'oxygene liquide confine dans un verre sol-gel poreux, au moyen d'une technique de birefringence optique dans la gamme des picosecondes, le dispositif utilise permettant de suivre les variations de the viscosite en fonction du diametre des pores et de the temperature.
Journal ArticleDOI
Supercooled liquids and solids in porous glass
D. D. Awschalom,J. Warnock +1 more
TL;DR: The depression of the solid-solid phase transition temperature was measured as a function of pore size, showing the strong influence of confinement on the solid phases.
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Freezing of Liquids in Porous Media with Special Reference to Frost Heave in Soils
TL;DR: In this article, the surface area of a liquid is large compared to its volume, and the normal freezing temperature of the liquid will be altered, which provides the driving force for frost heave in soils.