An efficient lithium extraction pathway in covalent organic framework membranes

Yang, Jinlei; Li, Lianshan; Tang, Zhiyong

doi:10.1016/j.matt.2021.06.049

Cited by 22 publications

(16 citation statements)

References 10 publications

(10 reference statements)

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“…In this way, Ma et al reported a lithiophilic oligoether‐functionalized COF‐based membrane, which presented an improved Li + /Mg 2+ separation factor of up to 64, as shown in Figure . [ 105 ] Remarkably, fast reversible coordination between Li + and the oligoether moieties enhances the transport of lithium ions in COF channels, thus distinguishing lithium ions from other ions.…”

Section: Applications For Ion Recoverymentioning

confidence: 99%

Advanced Covalent Organic Framework‐Based Membranes for Recovery of Ionic Resources

Xia

et al. 2022

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metal ions have strong chemical toxicity including carcinogenicity, mutagenicity and teratogenicity, which can cause danger threat to the natural ecosystem and public health. [2] These heavy metal ions, unlike organic pollutants, are nonbiodegradable, highly soluble, and mobile, and remain in the environment. [3] This water contamination has further aggravated water scarcity, causing a new and unprecedented challenge for mankind. On the other hand, pure ions such as lithium, heavy metal ions, and radionuclides are important resources for industrial applications. [4] For example, lithium has rising demand for various applications especially the recent burgeoning of lithium-ion batteries for electric equipment and energy storage devices. [5] Consequently, the efficient recovery of these ion resources with high purity is becoming an urgent issue.Many technologies have been implemented for water treatment, among which membrane technology attracted much attention because of its low energy consumption, small carbon footprint, convenient operation, and good scalability. [6] Recently, novel membranes constructed from advanced materials such as porous carbons, [7] layered double hydroxides, [8] graphene, [9] molybdenum disulfide nanosheet, [10] and metal organic frameworks (MOFs) [11] have attracted extensive attention for their high surface area and porous structures. These unique physical structures have an excellent separation performance over conventional polymer membranes. [12] Recently, a new class of crystalline material-covalent organic frameworks (COFs) has been put forward and applied in membrane fabrication. COFs have crystalline porous network structures with regular and periodical assembly covalent bonds synthesized from reversible reactions, and were first reported by Yaghi and co-workers in 2005. [13] After that, various COF materials including bromo-based COFs, imine-based COFs, and amine-based COFs were reported. [14] The geometry of the COF depends on the size, symmetry, and connectivity of the connecting bonds, enabling a precise fine-tuning of the COF-based membrane channels to separate molecules or ions with different sizes. Varieties of synthesis methods have been developed to produce novel COFs, [15] such as the hydrothermal method, [16] the ion thermal method, [17] the mechanochemical method, [18] and the microwave method. [19] The unique structure endows COFs with superior properties like orderly assembled channels, tunable pore size and miscibility with organics, [20] Membrane technology has shown a viable potential in conversion of liquidwaste or high-salt streams to fresh waters and resources. However, the nonadjustability pore size of traditional membranes limits the application of ion capture due to their low selectivity for target ions. Recently, covalent organic frameworks ( COFs) have become a promising candidate for construction of advanced ion separation membranes for ion resource recovery due to their low density, large surface area, tunable channel structure, and tailored functionality...

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Section: Applications For Ion Recoverymentioning

confidence: 99%

Advanced Covalent Organic Framework‐Based Membranes for Recovery of Ionic Resources

Xia

et al. 2022

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“…[19] Currently, using the adsorption technology to extract lithium from lithium-containing solutions has attracted increasing attention owing to its high efficiency, low cost and environmental friendliness. [20] Several types of lithium adsorbents, such as crown ether based-polymers, [21][22][23] ion imprinted adsorbents, [24][25][26] crystal materials with sub-nanoscale ion channels [27][28][29][30] have been developed to selectively capture lithium ions from aqueous solution. For example, Christopher M. Bates et al prepared a class of 12-crown-4functionalized (12C4) polymers, which captured sodium ions due to the matched cavity of 12C4 with the ionic radius of the sodium, achieving a relative selective separation of lithium/sodium.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, using the adsorption technology to extract lithium from lithium‐containing solutions has attracted increasing attention owing to its high efficiency, low cost and environmental friendliness [20] . Several types of lithium adsorbents, such as crown ether based‐polymers, [21–23] ion imprinted adsorbents, [24–26] crystal materials with sub‐nanoscale ion channels [27–30] have been developed to selectively capture lithium ions from aqueous solution. For example, Christopher M. Bates et al.…”

Section: Introductionmentioning

confidence: 99%

Fluorine‐Rich Supramolecular Nano‐Container Crosslinked Hydrogel for Lithium Extraction with Super‐High Capacity and Extreme Selectivity

Yang

et al. 2023

Angewandte Chemie

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Extraction and recovery of lithium from reserves play a critical role in the sustainable development of energy due to the explosive growth of the lithium‐battery market. However, the low efficiency of extraction and recovery seriously threatens the sustainability of lithium supply. In this contribution, we fabricate a novel mechanically robust fluorine‐rich hydrogel, showing highly efficient Li+ extraction from Li‐containing solutions. The hydrogel was facilely fabricated by simple one‐pot polymerization of supramolecular nanosheets of fluorinated monomers, acrylic acid and a small amount of chemical crosslinkers. The hydrogel exhibits a remarkable lithium adsorption capacity (Qm Li+=122.3 mg g−1) and can be reused. Moreover, it can exclusively extract lithium ions from multiple co‐existing metal ions. Notably, the separation of Li+/Na+ in actual wastewater is achieved with a surprising separation factor of 153.72. The detailed characterizations as well as calculation showed that the specific coordination of Li−F plays a central role for both of the striking recovery capability and selectivity for Li+. Furthermore, an artificial device was constructed, displaying high efficiency of extracting lithium in various complex actual lithium‐containing wastewater. This work provides a new and promising avenue for the efficient extraction and recovery of lithium resource from complex lithium‐containing solutions.

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“…They have characteristics of high porosity, adjustable pore size, and controllable functionalization, − which endow COF-based membranes with obvious advantages in improving permselectivity of separation. In recent years, self-supporting membranes or composite membranes based on COFs have been developed for water treatment, − ion conduction, − and so on, − demonstrating the great potential of COFs as advanced membrane materials. In order to obtain crystalline structures, COFs are usually constructed on the basis of covalent bonds with good reversibility.…”

Section: Introductionmentioning

confidence: 99%

Polyamide Covalent Organic Framework Membranes for Molecular Sieving

Zhou

et al. 2022

ACS Appl. Mater. Interfaces

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Polyamide is an important class of membrane materials for separation technology. The polyamide membranes currently used are amorphous, and thus, their pore structures are disordered, which inevitably decreases their performance in separation. Herein, we report a new type of polyamide membranes which are fabricated from amide-linked covalent organic frameworks (COFs), a class of crystalline porous polymers with well-ordered pore structures. Thanks to the structural advantages of amide-linked COFs, the polyamide COF membranes not only exhibit high permeability (482.3 L m–2 h–1 bar–1 to water) and high rejection rate to organic dyes (>99% for methylene blue) but also display excellent stability under a harsh environment. The vantage of the polyamide COF membranes is also manifested by the comparison of their mechanical property, stability, and separation performance with that of the membranes fabricated from the COFs having the same building blocks but linked with imine and amine linkages. This work demonstrates that amide-linked COFs, which combine the structural features of COFs and polyamide, could be a new type of advanced materials for the fabrication of high-performance separation membranes.

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An efficient lithium extraction pathway in covalent organic framework membranes

Cited by 22 publications

References 10 publications

Advanced Covalent Organic Framework‐Based Membranes for Recovery of Ionic Resources

Advanced Covalent Organic Framework‐Based Membranes for Recovery of Ionic Resources

Fluorine‐Rich Supramolecular Nano‐Container Crosslinked Hydrogel for Lithium Extraction with Super‐High Capacity and Extreme Selectivity

Polyamide Covalent Organic Framework Membranes for Molecular Sieving

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