Tailoring permeation channels of graphene oxide membranes for precise ion separation

Jia, Zhiqian; Shi, Weixing

doi:10.1016/j.carbon.2016.02.016

Cited by 79 publications

(23 citation statements)

References 43 publications

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“…Intercalating varied‐sized materials between host nanosheets allows the tuning of channel size accordingly, after which the intake of different permeants can be regulated. Following this line of reasoning, previous works first attempted to adjust GO laminates using diamine (NH 2 RNH 2 ) and dicarboxylic (HOOCRCOOH) monomers with different dimensions . While the two terminal groups covalently bridge GO building blocks through NHCO and COO bond, respectively, the chain length in the middle can be replaced to enlarge or narrow 2D channels.…”

Section: Transport‐controlling Effectsmentioning

confidence: 99%

2D Laminar Membranes for Selective Water and Ion Transport

Kang

Xia

Wang

et al. 2019

Adv Funct Materials

258

148

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energy storage and conversion devices, [26][27][28] as outlined in recent reviews (Figure 1, left). [29] Behind these applications lie a fundamental question: how water and ion transport are controlled in the laminar structure to obtain desired selectivity. A comprehensive summary of structure-transport relation is thereby imperative to understand and optimize membrane selective performance, but is so far lacking. In such context, our review aims to fill this gap by discussing: 1) how 2D materials with specific physicochemical features are assembled into laminar membranes; 2) most importantly, how membrane structure, and its response to external impacts, can tune mass transport (herein, water and ions); 3) how these transport mechanisms translate into selectivity in applications, and into future design of high-performance laminar membranes. Unsolved problems and emerging challenges around these topics are then concluded. We note that the knowledge summarized here can also, at least partly, assist the understanding of the selective gas, liquid, and micromolecule transport through laminar membranes, which are gaining considerable attention as well. [30][31][32] Transition Metal Carbides and/or Nitrides (MXene): MXene nanosheets are etched and delaminated from parent bulk MAX to M n+1 X n T x (e.g., Ti 3 C 2 T x ), and have thus several atom sublayers. [39] While M and X are early transition metal

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Section: Transport‐controlling Effectsmentioning

confidence: 99%

2D Laminar Membranes for Selective Water and Ion Transport

Kang

Xia

Wang

et al. 2019

Adv Funct Materials

258

148

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“…17 That is why a pure GO laminar membrane cannot effectively perform its size-exclusion function during membrane separation processes due to its low mechanical stability. 16,18,19 Therefore, to enhance their stability in aqueous systems, laminar GO membranes need to be modied by processes such as chemical cross-linking, [20][21][22] partial reduction 23,24 and intercalation. 25 As an emerging membrane technology, forward osmosis (FO) has attracted much attention because of its wonderful advantages over other traditional membrane separation techniques, including low energy consumption, 26 low membrane fouling [27][28][29] and low equipment requirement, and so on.…”

Section: Introductionmentioning

confidence: 99%

Preparation of freestanding graphene-based laminar membrane for clean-water intake via forward osmosis process

Feng

Zhang

et al. 2017

RSC Adv.

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“…The separation factors of K/Na and Cs/Na using the GO-120 membrane were 1.72 and 1.82, respectively, and reached 3.57 and 3.83 for Ca/Mg and Sr/Mg. The separation factors of K/Fe and Ca/Fe when K + , Ca 2+ and Fe 3+ permeated through GO-120 were 238.20 and 25.61, respectively, which were much higher than other reported previously [6] and [19]. Overall, GO-120 displayed the best separation behavior for main group elements amongst GO-25, GO-80, and GO-120.…”

Section: Metal Ion Permeation Through the Gomsmentioning

confidence: 64%

“…The permeability of the GOMs to monovalent alkali metal ions was greater than that to bivalent alkaline earth metal ions. Many studies have reported that cations of the same valence with a smaller hydrated ionic radius display higher permeation than those with larger hydrated ionic radius and the permeability of monovalent ions in the first main group is greater than that of bivalent ions [6,19,29]. Figure 4C shows the permeability behavior of K + , Ca 2+ , and Fe 3+ through the untreated GOM, GO-25, GO-80, and GO-120.…”

Section: Metal Ion Permeation Through the Gomsmentioning

confidence: 99%

“…Therefore, researchers have shifted their focus from monolayer graphene to graphene oxide membranes (GOMs) with a multilayer structure. Graphene oxide (GO) is a graphene derivative that can be easily processed into separation membranes with the ability to sieve ions and molecules [5][6][7]. A number of researchers have proposed that transport of ions and molecules can be limited by the interlayer spacing between the layers of GOM, where the cutoff size is determined by an effective interlayer spacing (d) of~9 Å [4,7,8].…”

Section: Introductionmentioning

confidence: 99%

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Ion Transport Behavior through Thermally Reduced Graphene Oxide Membrane for Precise Ion Separation

Huang

Miao

et al. 2019

Crystals

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The cation transport behavior of thermally treated reduced graphene oxide membranes (GOMs) is reported. The GOMs were reduced by heat treatment at 25, 80, and 120 °C and then characterized by Fourier transform infrared spectroscopy, X-ray powder diffraction, and X-ray photoelectron spectroscopy to determine oxygen group content, C/O ratio, and layer spacing. The permeation rates of various cations with different sizes and charge numbers through these membranes were measured to understand the effect of the cations on transport behavior. The results indicated that the cation transport through the membranes depended on the layer spacing of the membrane and ion size and charge. Cations of the same valence permeating through the same GOM could be differentiated by their hydration radius, whereas the same type of cation passing through different GOMs could be determined by the spacing of the GOM layers. The cation valence strongly affected permeation behavior. The GOM that was prepared at 120 °C exhibited a narrow layer spacing and high separation factors for Mg/Ca, Mg/Sr, K/Ca, and K/Fe. The cations moving through the membrane could insert into the membrane lamellas, which neutralized the negative charge of the membrane, enlarged the layer spacing of the GOMs, and affected cation permeation.

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Tailoring permeation channels of graphene oxide membranes for precise ion separation

Cited by 79 publications

References 43 publications

2D Laminar Membranes for Selective Water and Ion Transport

2D Laminar Membranes for Selective Water and Ion Transport

Preparation of freestanding graphene-based laminar membrane for clean-water intake via forward osmosis process

Ion Transport Behavior through Thermally Reduced Graphene Oxide Membrane for Precise Ion Separation

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