Influence of analysis conditions on low pressure adsorption measurements and its consequences in characterization of energetic and structural heterogeneity of microporous carbons

Bereznitski, Y.; Jaroniec, Mietek; Gadkaree, K. P.

doi:10.1007/bf01653630

Cited by 10 publications

(11 citation statements)

References 6 publications

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“…1) a reasonable value of ca. 11.7 m 2 /g is observed, and this is the typical value recorded for graphite (or graphitised carbon black) [24,25].…”

Section: The Origin Of Relationship Between Adsorption and Tube Diametermentioning

confidence: 91%

Detecting adsorption space in carbon nanotubes by benzene uptake

Wiśniewski¹,

Gauden²,

Terzyk³

et al. 2013

Journal of Colloid and Interface Science

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“…1) a reasonable value of ca. 11.7 m 2 /g is observed, and this is the typical value recorded for graphite (or graphitised carbon black) [24,25].…”

Section: The Origin Of Relationship Between Adsorption and Tube Diametermentioning

confidence: 91%

Detecting adsorption space in carbon nanotubes by benzene uptake

Wiśniewski¹,

Gauden²,

Terzyk³

et al. 2013

Journal of Colloid and Interface Science

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“…43 This can be related to N 2 diffusion limitations at low pressure that may affect adsorption measurements. 44 Therefore, a CO 2 adsorbate was also used. It requires only moderate absolute pressure (above 10 −5 MPa) for low relative pressure measurements, and its high saturation pressure of CO 2 at 0 °C allows for the minimization of the diffusion limitations of adsorption for ultramicropores.…”

Section: Xrdmentioning

confidence: 99%

Structure and Sorption Properties of a Zeolite-Templated Carbon with the EMT Structure Type

et al. 2014

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An ordered microporous carbon material was prepared by the nanocasting process using the EMC-2 zeolite (EMT structure type) as a hard template. X-ray diffraction (XRD) and transmission electron microscopy (TEM) revealed long-range ordering in the material that resulted from the negative replication of the host template. The carbon porous network replicating the zeolite structure was modeled by overlapped spherical voids with diameters determined from the XRD pattern that displayed up to six distinct peaks. The surface delimiting the 3D interconnected porosity of the solid has a complex morphology. The pore size distribution calculated from the XRD-derived structural model is characterized by a maximum at 1.04 nm related to the long-range-ordered microporous network. Complementary studies by immersion calorimetry revealed that most of the porosity was characterized by a size above 1.5 nm. These porous features were compared to data resulting from classical analysis (DR, DFT, BET, etc.) of the N2 (77 K) and CO2 (low and high pressure, 273 K) physisorption isotherms. The limitations of these approaches are discussed in light of the pore size distribution consistently determined by XRD and immersion calorimetry measurements.

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“…The low-pressure range of nitrogen adsorption isotherms, especially the data representing the submonolayer adsorption stage, is essential for extracting information about the heterogeneity of surface energy of the examined solid [25]. The AEDs of all the examined MWNTs are shown in Fig.…”

Section: Heterogeneity Of Surface Energymentioning

confidence: 99%

“…(1) with respect to the AED function F (U), one is forced to assume a model for the local adsorption. In current work, the Fowler-Guggenheim (FG) equation describes the localized monolayer adsorption with lateral interactions of nitrogen molecules on the surfaces with a patchwise distribution of adsorption sites [17,23], which appears to be realistic for the description of adsorption of nitrogen on the surface of carbons [24,25],…”

Section: Calculation Of the Aedmentioning

confidence: 99%