Structure analysis of porous solids from preadsorbed films

Pfeifer, Peter; Johnston, Gregory; Deshpande, Ravindra; Smith, Douglas M.; Hurd, Alan J.

doi:10.1021/la00059a069

Cited by 29 publications

(18 citation statements)

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“…The Probability distributions P(R c ) are obtained from the histograms of voxels with covering radius R c in the material and pore spaces, respectively, and are commonly taken to be the volumeweighted distributions of the material and pore radii in geometrical analyses of porous media [39,40]. For media comprising very high aspect ratio fibers, the volume-weighted distribution of material radii is equivalent to the area-weighted fiber radius distribution; the number distribution is obtained by dividing each element of the histogram by the square of radius,…”

Section: Fiber and Pore Radius Distributionsmentioning

confidence: 99%

Three-dimensional imaging of electrospun fiber mats using confocal laser scanning microscopy and digital image analysis

Choong

2015

J Mater Sci

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Confocal laser scanning microscopy with fluorescent markers and index matching has been used to collect three-dimensional (3D) digitized images of electrospun fiber mats and of a borosilicate glass fiber material. By embedding the fluorescent dye in either the material component (fibers) or pore space component (the index matching fluid), acquisitions of both positive and negative images of the porous fibrous materials are demonstrated. Image analysis techniques are then applied to the 3D reconstructions of the fibrous materials to extract important morphological characteristics such as porosity, specific surface area, distributions of fiber diameter and of pore diameter, and fiber orientation distribution; the results are compared with other experimental measurements where available. The topology of the pore space is quantified for an electrospun mat for the first time using the Euler-Poincaré characteristic. Finally, a method is presented for subdividing the pore space into a network of cavities and the gates that interconnect them, by which the network structure of the pore space in these electrospun mats is determined.

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Section: Fiber and Pore Radius Distributionsmentioning

confidence: 99%

Three-dimensional imaging of electrospun fiber mats using confocal laser scanning microscopy and digital image analysis

Choong

2015

J Mater Sci

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“…That can be measured experimentally by using small-angle X-ray scattering [20], neutron scattering and adsorption measurements [21,22]. One indicator that measures the surface area roughness is the fractal dimension.…”

Section: The Methodology For Fractal Dimensionmentioning

confidence: 99%

“…This equation was used by Pfeifer et al [21] to calculate the roughness of adsorbents by coating them with multiple layers of water. The measurement of the surface area as a function of the number of water layers was carried out with nitrogen by using the BET analysis.…”

Section: The Methodology For Fractal Dimensionmentioning

confidence: 99%

A Monte Carlo integration method to determine accessible volume, accessible surface area and its fractal dimension

Herrera

Nicholson

2010

Journal of Colloid and Interface Science

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“…where and ... is the ensemble average, A N is the Avogadro constant, N is the number of nitogen molecules in the simulation box, and S denotes the surface area of one wall accessible to nitogen molecules. We used the method of Pfeifer et al [69] to evaluate S.…”

Section: Lma10 and Highly-graphitized Sterling Ft Carbon Surfaces: Simentioning

confidence: 99%

Morphologically disordered pore model for characterization of micro-mesoporous carbons

Kowalczyk

Gauden

Furmaniak

et al. 2017

Carbon

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Morphologically disordered pore model for characterization of micro-mesoporous carbons, Carbon (2016), AbstractWe present a new morphologically disordered slit-shaped pore (MDSP) model for simulating gas adsorption in micro-mesoporous carbonaceous materials. The MDSP model qualitatively accounts for the inherent roughness of carbon pore walls in accord with the atomistic structural model of LMA10 reference carbon material. The MDSP model is applied to pore size distribution (PSD) calculations from nitrogen adsorption isotherms measured at 77.4 K in the range of pore widths from 0.72 to 40 nm. The MDSP model improves significantly the nitrogen adsorption porosimetry and, being fully atomistic, it is transferable to study various adsorbate-adsorbent systems. Computations of PSD functions for a series of carbonaceous materials, including activated carbon fiber, granular activated carbons, synthetic activated carbons showed that MDSP generates smooth Gaussian-type PSD functions with a welldefined average pore size. Furthermore, PSD functions computed from the MDSP model are free from the artificial gaps in the region of narrow micropores (~1 nm and ~2 nm) predicted from the standard slit-shaped pore models with ideal graphite-like walls. MDSP is not only a complementary model to existing approaches, such as quench-solid density functional theory method, but it paves the way to efficient atomistic simulations of various compounds within morphologically disordered carbon nanopores.

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Structure analysis of porous solids from preadsorbed films

Cited by 29 publications

References 0 publications

Three-dimensional imaging of electrospun fiber mats using confocal laser scanning microscopy and digital image analysis

Three-dimensional imaging of electrospun fiber mats using confocal laser scanning microscopy and digital image analysis

A Monte Carlo integration method to determine accessible volume, accessible surface area and its fractal dimension

Morphologically disordered pore model for characterization of micro-mesoporous carbons

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