Hydrophobisation of active carbon surface and effect on the adsorption of water

Cosnier, Frédéric; Celzard, Alain; Furdin, G.; Bégin, Dominique; Marêché, J.F.; Barrès, Odile

doi:10.1016/j.carbon.2005.05.007

Cited by 45 publications

(16 citation statements)

References 22 publications

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“…A silylation reaction took place between the hydrolyzed vinyltrimethoxysilane molecules and the hydroxyl groups present on the carbon surface. Depending on the surface density of the latter, the binding of the vtmos to the carbon surface may be achieved through one, two or three bridging hydroxyls [18,21,22].…”

Section: Resultsmentioning

confidence: 99%

“…Chemical methods such as coating of organosilicon or fluorination by fluorocarbon (C 2 F 4 or C 2 F 6 ) either by plasma surface treatments [14], or through chemical reaction in liquid or gas phase in the case of organosilicon compounds [15,16], lead to the hydrophobisation of the surface, but cause a dramatic decrease in the pore volumes. Budarin et al [17] and Cosnier et al [18] improved hydrophobisation of activated carbon by reaction of vinyltrimethoxysilane (vtmos) in liquid phase, but large amounts of vtmos were employed and pore volumes of modified carbons decreased considerably, suggesting that this method is unsuitable for modification of carbon for EDLC application.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, further enhancement in hydrophobisation of carbon surface is necessary to improve the wettability of carbon in PC solvent. Recently, we have paid much attention to surfactant vtmos, which can enhance greatly hydrophobisation of carbon materials by grafting of vtmos functional groups [18]. In this study, hydrophobisation of carbon aerogel surface has been greatly enhanced by a simple surface treatment with surfactant vtmos aqueous solution, and the effects of enhanced surface hydrophobisation on EDLC performance have been investigated.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced surface hydrophobisation for improved performance of carbon aerogel electrochemical capacitor

Fang

Binder

2007

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced surface hydrophobisation for improved performance of carbon aerogel electrochemical capacitor

Fang

Binder

2007

Electrochimica Acta

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“…The modified carbon adsorbed much less water, allowing more selective adsorption of volatile organic compounds. [128] In similar work, activated carbon was functionalized with VTMOS by soaking the carbon in a dilute aqueous solution of the alkoxide. This functionalization allowed better wetting of the carbon by propylene carbonate for use in electric double-layer capacitor applications.…”

Section: Other Grafting Methodsmentioning

confidence: 99%

Functionalization of Porous Carbon Materials with Designed Pore Architecture

2009

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Recent progress in syntheses of porous carbons with designed pore architecture has rejuvenated the field of carbon chemistry and promises to provide new advanced materials. In order to reap the full benefit of designer carbons, it is necessary to develop chemistries for functionalizing the porous carbon surfaces. This Review examines methods of functionalizing porous carbon through direct incorporation of heteroatoms in the carbon synthesis, surface oxidation and activation, halogenation, sulfonation, grafting, attachment of nanoparticles and surface coating with polymers. Methods of characterizing the functionalized carbon materials and applications that benefit from functionalized nanoporous carbons with designed architecture are also highlighted.

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“…The surface texture of the AC was captured with a scanning electron microscope (SEM) (Gong et al, 2009) (S-3000N;Hitachi Ltd., xx, xx, Japan). AC surface groups were tested with a Fourier infrared spectrometer (NEXUS670; Nicolet Company, xx, xx, USA) (Lu et al, 2007;Cosnier et al, 2005), and their content was analyzed with Boehm titration (Daifullah et al, 2003).…”

Section: Adsorbent and Adsorbatementioning

confidence: 99%

Effects of activated carbon surface properties on the adsorption of volatile organic compounds

Sun

et al. 2012

Journal of the Air & Waste Management Association

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Physical and chemical properties of activated carbon (AC) were analyzed to investigate the effects of adsorbate properties on AC adsorption performance. Fixed-bed adsorption experiments were conducted with toluene, acetone, and xylene as adsorbates. From the results, the adsorption capacities of the three adsorbates had the following order: xylene > toluene > acetone. The correlation between experimental data and adsorbate properties was also analyzed. The results showed that different functional groups corresponding to the properties of adsorbates influenced the adsorptive properties of AC differently. The adsorption capacity of AC increased linearly as the molecular weight, dynamic diameter, boiling point, and density of the adsorbate increased. However, adsorption capacity decreased as the polarity index and vapor pressure of the adsorbate increased. For adsorption onto three types of AC, the adsorption energies of the three adsorbates had the following order: xylene > toluene > acetone.Implications: This paper focused on the research on adsorption behavior of activated carbon based on adsorbate properties. Adsorption experiments were conducted under the same condition while the adsorbates were toluene, acetone, and xylene, respectively. Correlation analysis between experimental data and adsorbate properties was conducted. The different groups have different influence on the adsorptive properties of ACs. The adsorption capacity of activated carbon increases with the increase of adsorbate molecular weight, dynamic diameter, boiling point, and density, and that this relationship is linear. The relationship between adsorption capacity and the polarity index and vapor pressure of adsorbate shows an opposite trend, and the adsorption capacities and adsorption energies of three kinds of activated carbon for these three adsorbates had the following order: xylene > toluene > acetone.

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Hydrophobisation of active carbon surface and effect on the adsorption of water

Cited by 45 publications

References 22 publications

Enhanced surface hydrophobisation for improved performance of carbon aerogel electrochemical capacitor

Enhanced surface hydrophobisation for improved performance of carbon aerogel electrochemical capacitor

Functionalization of Porous Carbon Materials with Designed Pore Architecture

Effects of activated carbon surface properties on the adsorption of volatile organic compounds

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