Simple models of adsorption in nanotubes

Furmaniak, Sylwester; Terzyk, Artur P.; Gauden, Piotr A.; Rychlicki, Gerhard

doi:10.1016/j.jcis.2005.12.032

Cited by 20 publications

(27 citation statements)

References 29 publications

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“…In our previous study (Furmaniak et al 2006) it was shown that the maximal monolayer capacity (calculated per surface unit) for nitrogen adsorption inside tubes is strongly dependent on tube diameter (especially for tubes having small diameters). For a description of this relation the equation derived from geometric considerations by Salmas and Androutsopoulos (2005) was shown to be correct.…”

Section: The Dependence Between Maximal Monolayer Capacity and Tube Dmentioning

confidence: 94%

“…Simulated isotherms were described using the model proposed in this study (equations (7) and (10)) and the genetic algorithm developed by Price (1996, 1997) and applied by us recently (Furmaniak et al 2006(Furmaniak et al , 2008b(Furmaniak et al , 2009c. The optimized best-fit parameters are: a m , K 1 , K p , A 1 , A p and N , however, the tube diameter was assumed based on a histogram obtained from HRTEM results (see below).…”

Section: Description Of Simulated Isotherms Using the New Modelmentioning

confidence: 99%

“…It can be also concluded that there is a lack of a model satisfactorily describing adsorption processes on external surfaces of carbon nanotubes since the process is very complex. In our first paper of this series a simple model of adsorption in the internal space of carbon nanotubes was proposed (Furmaniak et al 2006). The most important feature of the model was taking into account the changes in maximum adsorption capacity caused by a cylindrical shape of adsorption space, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Simple model of adsorption on external surface of carbon nanotubes—a new analytical approach basing on molecular simulation data

Furmaniak¹,

Terzyk²,

Gauden³

et al. 2010

Adsorption

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Nitrogen adsorption on carbon nanotubes is widely studied because nitrogen adsorption isotherm measurement is a standard method applied for porosity characterization. A further reason is that carbon nanotubes are potential adsorbents for separation of nitrogen from oxygen in air. The study presented here describes the results of GCMC simulations of nitrogen (three site model) adsorption on single and multi walled closed nanotubes. The results obtained are described by a new adsorption isotherm model proposed in this study. The model can be treated as the tube analogue of the GAB isotherm taking into account the lateral adsorbateadsorbate interactions. We show that the model describes the simulated data satisfactorily. Next this new approach is applied for a description of experimental data measured on different commercially available (and characterized using HRTEM) carbon nanotubes. We show that generally a quite good fit is observed and therefore it is suggested that the observed mechanism of adsorption in the studied mateElectronic supplementary material The online version of this article

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Section: The Dependence Between Maximal Monolayer Capacity and Tube Dmentioning

confidence: 94%

Section: Description Of Simulated Isotherms Using the New Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simple model of adsorption on external surface of carbon nanotubes—a new analytical approach basing on molecular simulation data

Furmaniak¹,

Terzyk²,

Gauden³

et al. 2010

Adsorption

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“…Knowledge of the adsorption properties of carbon nanotubes is important for the development of nanotube-based materials for the aforementioned applications. Hence, there is considerable interest in attaining a detailed characterization of the adsorption properties of carbon nanotubes (Eswaramoorthy et al 1999;Ohba and Kaneko 2002;Yang et al 2002;Cinke et al 2003;Migone and Talapatra 2004;Krungleviciute et al 2004;Furmaniak et al 2006;Rawat et al 2008;Albesa et al 2010;Cruz et al 2010;Esteves et al 2009). …”

Section: Introductionmentioning

confidence: 99%

A Study of the Adsorption Properties of Single Walled Carbon Nanotubes Treated with Nitric Acid

Blanco

Villarroel-Rocha

Múnera

et al. 2011

Adsorption Science & Technology

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ABSTRACT:The changes observed in the properties of Single Walled Carbon Nanotubes (SWCNTs) after treatment with nitric acid are reported. The oxidized nanotube samples were characterized morphologically by scanning electron microscopy and structurally by Raman spectroscopy, thermogravimetric analysis, infrared spectroscopy and X-ray photoelectron spectroscopy. Gas adsorption was used to study the changes in the surface properties of the samples (including the changes in their porosity), as well as the changes in the adsorbate-adsorbent interactions which occurred as a result of the acid treatment. The adsorption studies were conducted using nitrogen at 77 K and CO 2 at different temperatures between 263 K and 289 K at sub-atmospheric pressures. The isosteric heat was calculated from the data obtained and indicated a higher adsorbate-adsorbent interaction for the oxidized materials. A correlation was found between morphological and structural evolution and the adsorption properties of CO 2 , a probe gas which appears to be very suitable for characterizing the microporosity of these kinds of materials.

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“…It covers all fundamental principles of the adsorptive processes [2][3][4], simulation of surface adsorption [5][6][7], and fabrication of new adsorbents such as inorganic membranes [8,9] for gas separation and purification.…”

Section: Introductionmentioning

confidence: 99%

Single-walled carbon nanotubes as stationary phase in gas chromatographic separation and determination of argon, carbon dioxide and hydrogen

Safavi

Maleki

Doroodmand

2010

Analytica Chimica Acta

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Simple models of adsorption in nanotubes

Cited by 20 publications

References 29 publications

Simple model of adsorption on external surface of carbon nanotubes—a new analytical approach basing on molecular simulation data

Simple model of adsorption on external surface of carbon nanotubes—a new analytical approach basing on molecular simulation data

A Study of the Adsorption Properties of Single Walled Carbon Nanotubes Treated with Nitric Acid

Single-walled carbon nanotubes as stationary phase in gas chromatographic separation and determination of argon, carbon dioxide and hydrogen

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