Electrosorption of Ions from Aqueous Solutions by Nanostructured Carbon Aerogel

Ying, Tung-Yu; Yang, Kun‐Lin; Yiacoumi, Sotira; Tsouris, Costas

doi:10.1006/jcis.2002.8314

Cited by 240 publications

(116 citation statements)

References 22 publications

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“…The results of surface analysis by T-plot showed that the specific surface of micro-pour were 456 m 2 /gr, with a correlation coefficient (r) is equal 94.5. The results of the surface analyze with this study was comparable by the study of Ying et al (2002), so the Ying et al study, 85% of the surface area of the carbon aerogel composed of micro-pout porosity [17].…”

Section: Carbon Aerogel Characterizationsupporting

confidence: 86%

“…The low potential for clogging and fouling, easier operating conditions producing very little wastewater, aerogel electrostatic regeneration and therefore no need for acid and low energy consumption, including the benefits of this technology [15]. Integrated structure, high electrical conductivity (10-100 Siemens/cm), high surface area (400-1200 m 2 /g), pore size distribution and controllable, has caused the carbon aerogel to be ideal and suitable material for the electrochemical adsorption of ions [16,17], several studies have been conducted in this area. In a study conducted in 2002 by Gablich et al determined that monovalent ions such as sodium, compared with polyvalent ions are absorbed quickly.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Carbon Aerogel Manufacturing Process in Order to Desalination of Saline and Brackish Water in Laboratory Scale

2018

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Carbon aerogel its fabrication and characterization and its uses in this process were studied for desalinating of saline and brackish water. The carbon aerogel manufacturing process involves the polymerization and pyrolysis of the mixture of resorcinol and formaldehyde. Carbon aerogels were analyzed using BET, BJH, and T-plot after construction. The effect of various parameters (including the influent salt concentration, the intensity of electric current flow, the distance between the electrodes and pH) on salt adsorption were studied. Analysis of BET/BJH shown that the surface of aerogel was 677.8 m 2 /g. much of porosity in the samples of carbon aerogel were between 1-2 nm, namely micro-pour and a similar level 0f 456 m 2 /gr is dedicated to micro-pour, with a correlation coefficient (r) equal to 94.5. According to the results, it seems that carbon aerogel electrodes have a good structure in desalination of brackish and saline water.

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Section: Carbon Aerogel Characterizationsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Evaluation of Carbon Aerogel Manufacturing Process in Order to Desalination of Saline and Brackish Water in Laboratory Scale

2018

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“…When the pore size approaches the dimension of the EDL thickness, the effect of double layer overlapping has a significant influence on the electrosorption performance of carbon electrodes. Ying et al (2002) introduced the cutoff pore width, defined as the largest pore size having zero capacity, to demonstrate the overlapping effect. The cutoff width decreased with increasing the solution concentration, and then smaller pores can contribute to electrosorption.…”

Section: Introductionmentioning

confidence: 99%

Application of capacitive deionization technology to the removal of sodium chloride from aqueous solutions

Hou

Huang

2013

Int. J. Environ. Sci. Technol.

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Capacitive deionization has been developed as a promising desalination alternative for removing ions from aqueous solutions. In this study, the evaluation of capacitive performance was carried out by galvanostatic charge/discharge and cyclic voltammetry experiments. The good capacitive and electrosorption behaviors suggest carbon aerogel not only treated as an electrical double layer capacitor, but also as a potential electrode in capacitive deionization processes. Also, the capacitive deionization characteristics indicate that electrosorption/regeneration can be controlled by polarization and depolarization of each electrode. It implies that sodium and chloride ions are electrostatically held to form electrical double layer on the surface of charged electrodes. The electrosorption performance at different applied voltages and solution concentrations was investigated. It is found that the removal of sodium chloride increases with increasing applied voltage and solution concentration, resulting from stronger electrostatic interactions, higher concentration gradient, and less double layer overlapping effect. Based on Langmuir isotherm, the equilibrium electrosorption capacity at 1.2 V is determined as 270.59 lmol/g. Under this condition, due to the presence of micropores associated with the double layer overlapping, the effective surface area for electrosorption of ions at 1.2 V is estimated in the range of 12.18-14.25 % of the BrunauerEmmett-Teller surface area. The results provide a fundamental understanding of electrosorption of ions and help promoting capacitive deionization technology for water purification and desalination.

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“…Pores in the 1-10 nm range are achievable through various methods, including pyrolysis of templated polymers to form porous carbon electrodes, [96] reduction of metals in surfactant templates, [37,38] and dealloying. [97] These structures are not square arrays of uniform cylindrical pores, and specific adsorption can affect the amount delivered, [98] but this model can still closely capture their behavior. The charging rates of porous electrodes are also well studied.…”

Section: Capacitive Deliverymentioning

confidence: 99%

Optimized nanoporous materials.

Langham¹,

Jacobs²,

Ong³

et al. 2009

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Nanoporous materials have maximum practical surface areas for electrical charge storage; every point in an electrode is within a few atoms of an interface at which charge can be stored. Metal-electrolyte interfaces make best use of surface area in porous materials. However, ion transport through long, narrow pores is slow. We seek to understand and optimize the tradeoff between capacity and transport. Modeling and measurements of nanoporous gold electrodes has allowed us to determine design principles, including the fact that these materials can deplete salt from the electrolyte, increasing resistance. We have developed fabrication techniques to demonstrate architectures inspired by these principles that may overcome identified obstacles. A key concept is that electrodes should be as close together as possible; this is likely to involve an interpenetrating pore structure. However, this may prove extremely challenging to fabricate at the finest scales; a hierarchically porous structure can be a worthy compromise.

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Electrosorption of Ions from Aqueous Solutions by Nanostructured Carbon Aerogel

Cited by 240 publications

References 22 publications

Evaluation of Carbon Aerogel Manufacturing Process in Order to Desalination of Saline and Brackish Water in Laboratory Scale

Evaluation of Carbon Aerogel Manufacturing Process in Order to Desalination of Saline and Brackish Water in Laboratory Scale

Application of capacitive deionization technology to the removal of sodium chloride from aqueous solutions

Optimized nanoporous materials.

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