Design and fabrication of a graphene/carbon nanotubes/activated carbon hybrid and its application for capacitive deionization

Zhu, Guang; Wang, Wenqi; Li, Xuelian; Zhu, Junwu; Wang, Hongyan; Zhang, Li

doi:10.1039/c5ra23547b

Cited by 38 publications

(10 citation statements)

References 50 publications

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“…Thus, it can be assumed that when using composite aerogels as electrodes for MCDI under the tested conditions, the diffusion processes in a porous monolith do not limit the rate of deionization of water. The average value of the electrosorption capacity calculated from the experimental data presented in Figure 13 per unit mass of dry aerogel is 25.3 mg/g, which also exceeds that obtained in previously published works [16,18].…”

Section: Surface and Some Other Properties Of Composite Aerogelssupporting

confidence: 58%

“…The process is completely symmetrical, which indicates the reversibility of electrosorption and desorption. The specific capacity for the sorbed salt (per 1 g of dry electrode material) calculated from these curves is 62 mg/g, and this value, taking into account the equilibrium concentration of salt in a liquid phase, exceeds all known and previously published capacitance values [16][17][18]. We can consider how the same electrodes work in dynamic mode.…”

Section: Surface and Some Other Properties Of Composite Aerogelsmentioning

confidence: 83%

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Composite Graphene-Containing Porous Materials from Carbon for Capacitive Deionization of Water

Bakhia

Хамизов

Bavizhev³

et al. 2020

Molecules

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New techniques were developed for the synthesis of monolithic highly porous composite aerogels (hydrogels) from reduced graphene oxide and carbon nanotubes, as well as graphene-containing composites based on mesoporous activated carbon. Simple operations for hydrophilization of synthesized samples were proposed. New electrode materials for electrosorption and deionization of water were fabricated. The resulting materials were investigated and tested in electrochemical cells for membrane capacitive deionization (MCDI).

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Section: Surface and Some Other Properties Of Composite Aerogelssupporting

confidence: 58%

Section: Surface and Some Other Properties Of Composite Aerogelsmentioning

confidence: 83%

Composite Graphene-Containing Porous Materials from Carbon for Capacitive Deionization of Water

Bakhia

Хамизов

Bavizhev³

et al. 2020

Molecules

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“…Many studies have demonstrated that carbon-based materials can meet the requirements of high performance CDI electrodes, such as activated carbon, porous carbon, carbon nanotubes, graphene and their composites with inorganic materials. [14][15][16][17][18][19][20][21][22][23][24][25][26][27] However, almost all carbon-based materials for CDI electrodes reported to date are exclusively synthesized by using petroleum-derived chemicals, undoubtedly enhancing the cost of large-scale production applications. Therefore, seeking low-cost and abundant carbon sources to fabricate carbon-based materials for high-performance CDI is still highly requested.…”

Section: Introductionmentioning

confidence: 99%

Biomass-derived N-doped porous carbon as electrode materials for Zn-air battery powered capacitive deionization

Zhao

Liu

Sun

et al. 2018

Chemical Engineering Journal

196

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Capacitive deionization (CDI) has been a promising technique to obtain fresh water by electrosorption of charged ionic species in seawater/brackish water. Its performance is highly dependent on the physical and chemical properties of CDI electrode materials. Herein, Ndoped porous carbon (NPC) with a N content of 1.66 at.% was fabricated using soybean shell as starting material by a facile pyrolysis approach with the assistance of KHCO 3 in N 2 atmosphere. The as-prepared NPC with porous structure and high surface area (1036.2 m 2 g-1) was further functionalized with sulfonic groups in an aryl diazonium salt solution to obtain sulfonyl functionalized NPC (S-NPC) with a surface area of 844.0 m 2 g-1. S-NPC as cathode material was assembled into an asymmetric CDI device with aminated activated carbon (A-AC) as anode material, exhibiting superior CDI performance with an adsorption capacity of 15.5 mg g-1 and an average adsorption rate of 0.44 mg g-1 min-1 in 40 mg L-1 NaCl solution at an applied voltage of 1.2 V. As a proof of concept study, such configured CDI device was also powered for the first time by a Zn-air battery made from NPC with an open-circuit voltage of 1.28 V owing to N doping in soybean shell derived porous carbon with superior oxygen reduction reaction (ORR) activity, delivering an impressive CDI performance with an adsorption capacity of 15.8 mg g-1 and an average adsorption rate of 0.37 mg g-1 min-1 in 40 mg L-1 NaCl solution. This superior CDI performance can be due to S-NPC with high surface area, porous structure and surface rich negative charges resulted from sulfonyl functionalization, favourable for adsorption active sites exposure and mass transport of Na + ions.

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“…The electrosorption performance of CNTs electrodes fabricated using different methods was investigated by batch-mode electrosorption experiments with a continuously recycling system [21].…”

Section: Batch-mode Electrosorption Experimentsmentioning

confidence: 99%

A comparative study on electrosorption behavior of carbon nanotubes electrodes fabricated via different methods

Zhu¹,

Wang²,

Zhang³

2016

Chemical Physics Letters

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The carbon nanotubes (CNTs) electrodes were fabricated via electrophoretic deposition (EPD), press and screen printing methods, respectively. The electrochemical properties and electrosorption performance of the CNTs electrodes were tested, respectively. Inhere, screen printing, as a conventional method for fabricating supercapacitor electrodes, was used for fabricating the CDI electrodes for the first time. Such a comparison is reasonably envisaged not only to be used to further understanding the influence of fabrication method on the electrode performance, but also to form a fundamental basis for CDI applications.

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Design and fabrication of a graphene/carbon nanotubes/activated carbon hybrid and its application for capacitive deionization

Abstract: Novel three-component graphene/carbon nanotubes/activated carbon (GTAC) hybrids were prepared and investigated as capacitive deionization electrode, and as-prepared GTAC-20 hybrid exhibits a high elcetrosorption capacity of 2.30 mg g−1 and good repeatability.

Cited by 38 publications

References 50 publications

Composite Graphene-Containing Porous Materials from Carbon for Capacitive Deionization of Water

Composite Graphene-Containing Porous Materials from Carbon for Capacitive Deionization of Water

Biomass-derived N-doped porous carbon as electrode materials for Zn-air battery powered capacitive deionization

A comparative study on electrosorption behavior of carbon nanotubes electrodes fabricated via different methods

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