Capacitive deionization of saline water using sandwich-like nitrogen-doped graphene composites <i>via</i> a self-assembling strategy

Yan, Tingting; Liu, Juan; Lei, Hong; Shi, Liyi; An, Zhisheng; Park, Ho Seok; Zhang, Dengsong

doi:10.1039/c8en00629f

Cited by 78 publications

(40 citation statements)

References 39 publications

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“…1.72 1.96 2015 [67] N-doped electrospun rGO-carbon nanofiber composite (NG-CNF) ≈100 μS cm −1 3.91 2015 [68] SO 3 H-graphene-carbon nanofibers 400 9.54 2015 [69] SO 3 H/NH 2 graphene/activated carbon 500 10.3 2014 [36] Hierarchical hole-enhanced 3D graphene 80 8.0 2018 [70] Spherical macroporous 0.5 × 10 −3 m 5.7 2018 [71] 3D intercalated graphene nanocomposite 500 22.09 2018 [72] MgAl-Ox/G nanohybrids 500 13.6 2018. [37] 3D channel-structured graphene (CSG) 295 9.6 2019 [73] CO 2 activated rGO(AGE) 500 6.26 2019 [39] GO/hierarchical porous carbon 55.72 7.74 2018 [74] SiO 2 activated GO (GR/NMC) 500 18.4 2018 [75] p-phenylenediamine functionalized GO ≈100 μS cm −1 7.88 2018 [76] Mesoporous G@MC heterostructured 500 24.3 J2018 [77] Graphene/Co 3 O 4 composite 250 18.63 2018 [78] N-doped graphitic carbon polyhedrons 500 17.77 2019 [79] EAIERs 802 μS cm Figure 4B,C, and Figures S8, S9, and S11, Supporting Information). The observed results, comparable with other reported graphenic composites, revealed that our material exhibited improved adsorption capacity than bare rGO (approximately five times higher than reported) ( Table 2).…”

Section: Methodsmentioning

confidence: 99%

A Covalently Integrated Reduced Graphene Oxide–Ion‐Exchange Resin Electrode for Efficient Capacitive Deionization

Islam

Gupta

Jana

et al. 2021

Adv Materials Inter

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terms of equipment and energy consumption. [6,8-11] Capacitive deionization (CDI) is an emerging technology which involves adsorption and desorption of ions on the electrode surface by application of low potential difference (≈1.2-1.8 V) across a pair of porous carbon electrodes, thereby making it both energy and cost-efficient compared to other existing desalination methods. When a flowing water stream is passed across a CDI system, cations and anions move toward oppositely charged electrodes and get adsorbed on them, thereby generating deionized and 'drinkable' water, starting from brackish water. Subsequently, adsorbed ions can be removed from the electrode by reversing the polarity, thereby regenerating the electrode surface, ready for reuse for next adsorption cycle. [5] Thus, clean water can be produced continuously by repeating the adsorption and desorption cycles. CDI is a cost-effective, point-of-use method with a high theoretical desalination efficiency. [5] However, its practical applications for desalination are yet to be recognized at a large scale, and research is being carried out to synthesize new materials with improved adsorption capacities. [5,12-14] Related technologies such as Faradaic deionization and the use of different 2D materials in CDI are also explored intensely. [15-17] Various carbonaceous materials and their composites are being used as CDI electrodes because of their high salt adsorption capacities in the range of several mg g −1. [18-25] Graphene, and graphene-derivatized materials, such as, graphene-like nanoflakes, [26] activated carbon, [27] activated carbon nanofiber (ACF), [28] reduced graphene oxide (rGO), [27,29] carbon nanotubes (CNT), [29] graphene-CNT composites, [29,30] rGO-ACF, [28] 3D macroporous graphene architectures, [31] sponge-templated graphene, [14] graphene-Fe 3 O 4 , [32] graphene chitosan-Mn 3 O 4 , [33] rGO-activated carbon composites, [27] and functionalized graphene nanocomposite, [34] have been used as CDI electrodes. The adsorption capacities of graphenic composites, such as graphene/carbon nanotube, CO 2 activated rGO, sulfonic functional graphite nanosheets, SO 3 H/NH 2 graphene/activated carbon, MgAl-Ox/G nanohybrids, 3D-graphene architecture, and graphene sponge measured were 1

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Section: Methodsmentioning

confidence: 99%

A Covalently Integrated Reduced Graphene Oxide–Ion‐Exchange Resin Electrode for Efficient Capacitive Deionization

Islam

Gupta

Jana

et al. 2021

Adv Materials Inter

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“…For just the removal of sodium and chloride ions, mesoporous nitrogen‐doped carbon grown on graphene sheets showed excellent properties due to the increased adsorption sites and rapid electron transportation pathways showing that the hybridization strategy is also promising for CDI. These materials were able to remove up to 18.4 mg g −1 of sodium chloride from 0.5 g L −1 sodium chloride solution at 1.4 V. [ 99 ]…”

Section: From Redox‐reactions To Electrocatalysis—versatile Applications Of All‐carbon Hybrid Nanomaterialsmentioning

confidence: 99%

The Functional Chameleon of Materials Chemistry—Combining Carbon Structures into All‐Carbon Hybrid Nanomaterials with Intrinsic Porosity to Overcome the “Functionality‐Conductivity‐Dilemma” in Electrochemical Energy Storage and Electrocatalysis

Ilic

Oschatz

2021

Small

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Nanoporous carbon materials can cover a remarkably wide range of physicochemical properties. They are widely applied in electrochemical energy storage and electrocatalysis. As a matter of fact, all these applications combine a chemical process at the electrode–electrolyte interface with the transport (and possibly the transfer) of electrons. This leads to multiple requirements which can hardly be fulfilled by one and the same material. This “functionality‐conductivity‐dilemma” can be minimized when multiple carbon‐based compounds are combined into porous all‐carbon hybrid nanomaterials. This article is giving a broad and general perspective on this approach from the viewpoint of materials chemists. The problem and existing solutions are first summarized. This is followed by an overview of the most important design principles for such porous materials, a chapter discussing recent examples from different fields where the formation of comparable structures has already been successfully applied, and an outlook over the future development of this field that is foreseen.

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“…To address this, Yan et al . created a nitrogen‐doped mesoporous carbon‐graphene sandwich (GR/NMC) using a self‐assembly method on the graphene surface [69] . The composite not only prevented aggregation but also created a “plane‐to‐porous plane” conducting network, which improved electron transport.…”

Section: Development Of Carbon‐based CDI Electrodesmentioning

confidence: 99%

Carbon‐Based Capacitive Deionization Electrodes: Development Techniques and its Influence on Electrode Properties

Angeles

Lee

2021

The Chemical Record

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Capacitive deionization (CDI) is a potential technology to provide cost efficient desalinated and/or softened water. Several efforts have been invested in the fabrication of CDI electrodes that not only has outstanding performance but also high chance of large scalability. In this personal account, the different techniques in developing carbon‐based materials are presented together with its actual effect on the surface and electrochemical properties of carbon. The categories presented are based on the studies done by the Electrochemical Reaction and Technology Laboratory, the Ertl Center, different research groups in South Korea, and selected papers from the past three years. Our perspective about research gaps and prospects are also included with the aim to increase interest for CDI research.

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Capacitive deionization of saline water using sandwich-like nitrogen-doped graphene composites via a self-assembling strategy

Abstract: Capacitive deionization of saline water using sandwich-like nitrogen-doped graphene composites via a self-assembling strategy has been demonstrated.

Cited by 78 publications

References 39 publications

A Covalently Integrated Reduced Graphene Oxide–Ion‐Exchange Resin Electrode for Efficient Capacitive Deionization

A Covalently Integrated Reduced Graphene Oxide–Ion‐Exchange Resin Electrode for Efficient Capacitive Deionization

The Functional Chameleon of Materials Chemistry—Combining Carbon Structures into All‐Carbon Hybrid Nanomaterials with Intrinsic Porosity to Overcome the “Functionality‐Conductivity‐Dilemma” in Electrochemical Energy Storage and Electrocatalysis

Carbon‐Based Capacitive Deionization Electrodes: Development Techniques and its Influence on Electrode Properties

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