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Article
Engineering, Environmental
Chao Yang et al.
Summary: The study successfully synthesized acid-stable cationic COF layers by introducing -OH functionalities on anion exchange membranes, leading to an increased separation factor for HCl recovery. This method shows promise for expanding the application of COF membranes in acid recovery processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Yuxi Feng et al.
Summary: By synthesizing a new QBPD monomer and modifying the PEI membrane, the rejection rate and pure water flux of MgCl2 were improved, showing good stability and potential for lithium extraction from salt lakes with high Mg2+/Li+ ratio.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Physical
Xu Liang et al.
Summary: This study demonstrates the application of covalent organic framework (COF) membranes for efficient ethylene/ethane separation. By loading and modifying the membranes with a silver ion-containing ionic liquid layer, the membrane channel size is reduced and high ethylene/ethane selectivity and ethylene permeance are achieved. The COF membranes also exhibit superior chemical stability and long-term operation stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Engineering, Chemical
Rongrong He et al.
Summary: In this study, a highly selective nanofiltration hollow fiber membrane was prepared by layer-by-layer deposition for the separation of Mg2+/Li+ under the challenge of high Mg2+/Li+ ratio. The membrane showed promising performance in experiments and set a record for the permselectivity of Mg2+/Li+ separation.
Article
Engineering, Chemical
Yu Zheng et al.
Summary: Covalent organic frameworks (COFs) are ideal membrane materials due to their pre-designable and well-defined pore structures. This study developed a method to prepare COF membranes (COFMs) by controlling the seeding layer, resulting in improved processability and desalination performance.
Article
Engineering, Chemical
Yang Yang et al.
Summary: The study presents a polyelectrolyte multilayered method for fabricating nanofiltration membranes by integrating dopamine as a bio-glue. The results show that the introduction of multilayers can significantly enhance the water permeability and ion rejection of the membranes. Furthermore, the application of this method on hollow fiber membrane modules also achieved good performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Zeshan Xiong et al.
Summary: This study reports a versatile and efficient strategy of amorphous-to-crystalline transformation for the fabrication of highly crystalline HCOFs. The approach allows for the control of hollowing process and crystallization process by regulating the dynamic imine exchange reaction. Various HCOFs with ultrahigh surface areas and uniform morphologies were successfully synthesized, and COF-based yolk-shell nanostructures with functional interior cores were also fabricated. The obtained metal@HCOFs catalysts showed enhanced catalytic activity and size-selectivity, highlighting the significance of nucleation-growth kinetics of COFs in tuning their morphologies, structures, and applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Lingling Wang et al.
Summary: An unprecedented electrocleavage synthesis strategy is reported for the direct synthesis of COF films at room temperature. This strategy involves the cathodic exfoliation of COF powders to nanosheets, followed by nanosheets migrating to the anode and reproducing the COF structures by anodic oxidation. The COF films possess high crystallinity and hierarchical porosity, and have demonstrated rapid iodine adsorption with record-high rate constants, making them an excellent platform for promoting mass transfer.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Weiwei Zhang et al.
Summary: This study presents a general and scalable method to prepare robust, highly crystalline imine COFs, which greatly enhances crystallinity and porosity through a reconstruction route. This nanoconfinement-assisted reconstruction strategy is a step towards programming function in organic materials through atomistic structural control.
Article
Green & Sustainable Science & Technology
Meidi Wang et al.
Summary: The lack of access to clean water for billions of people is a global sustainability challenge, which can be addressed by membrane technologies. The use of covalent organic framework (COF) membranes can achieve ultrafast desalination and excellent fouling resistance, offering great potential in practical applications.
NATURE SUSTAINABILITY
(2022)
Article
Nanoscience & Nanotechnology
Faizal Soyekwo et al.
Summary: Lithium separation is crucial for overcoming the shortage in lithium supply in the energy sector. By modifying the polyamide thin-film composite membrane with the novel ionic liquid monomer DABIL, the selectivity for lithium extraction is improved, along with increased permeability and antibacterial activity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Multidisciplinary
Weiwen Xin et al.
Summary: This Minireview provides an overview of strategies for engineering bio-inspired self-assembled ion channels and focuses on emerging channel assemblies based on different fabrication processes such as supramolecular assembly, nanosystem-based fabrication, and polymer-based integration. These channels exhibit smart ion-transport properties and have great potential for applications in the exploration of physiological events, detection of molecules/ions, ion separation, and energy conversion. The article also proposes future developments and challenges in this booming research field.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Materials Science, Multidisciplinary
Yan Zhao et al.
Summary: This tutorial review analyzes and summarizes the latest advances in the design and development of target ion-selective separation in electro-driven membranes. The article focuses on the fabrication process of these membranes and critically analyzes the evaluation metrics for their selective separation efficiency. Furthermore, the state-of-the-art applications of these membranes are summarized. The study suggests promising potential approaches for designing, fabricating, testing, and applying electro-driven membranes in target ion-selective separation for resource sustainability.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Multidisciplinary Sciences
Zongyao Zhou et al.
Summary: Inspired by natural light-gated ion channels, an artificial light-gated ion channel membrane was developed using conjugated microporous polymers. Through precise control of pore size and thickness on a molecular level, the membrane exhibited uniform pore size and highly sensitive light-switchable response for reversible ion transport.
Article
Engineering, Chemical
Tianrun Gu et al.
Summary: In this study, a positively selective layer for Li+/Mg2+ separation was successfully constructed on the surface of a polyamide nanofiltration membrane through modification, leading to significantly increased membrane surface charge density and high performance in Li+/Mg2+ separation.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Materials Science, Multidisciplinary
Yuecheng Xiong et al.
Summary: Lithium has been considered crucial for modern energy infrastructures, but its production rate has not kept up with global demand. Electrochemical extraction of lithium from seawater has received attention as a viable solution to achieve a circular economy.
Review
Chemistry, Multidisciplinary
Huacheng Zhang et al.
Summary: This review comprehensively summarizes the research progress in the rational design and synthesis of artificial subnanometer-sized ion channels, discusses their ion selectivity and applications, and explores the gaps between natural channels and synthetic channels in terms of ion selectivity and permeability.
CHEMICAL SOCIETY REVIEWS
(2022)
Article
Engineering, Chemical
Zhao Yang et al.
Summary: The global demand for lithium resources is increasing due to the widespread use of lithium batteries in consumer electronics and electric vehicles. A dual-skin layer nanofiltration membrane with high Mg2+/Li+ selectivity was developed, showing efficient separation of lithium from natural brines.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Zheyuan Guo et al.
Summary: This study introduces a triphase method for the synthesis of ionic covalent organic framework nanosheets, demonstrating the production of iCOFNs with excellent properties and their potential applications in the field of ultrathin COF membranes. The innovative approach of using the oil-water-oil system provides a new platform for the synthesis and application of iCOFNs.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Engineering, Environmental
Adam Seip et al.
Summary: Hydraulic fracturing wastewater can be used to recover lithium resources with manganese-based lithium sorbents, but organic molecules in the wastewater lead to sorbent loss during the process.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Shanshan Xu et al.
Summary: This review article summarizes membrane technologies for lithium extraction from Chinese salt-lake brines, including membrane extraction, nanofiltration, lithium ion-sieve, electrodialysis, and forward osmosis. The focus is on achieving high selectivity and adsorption capacity for lithium extraction, as well as proposing carbon neutral FO for concentrating lithium-enriched brines. The strategies discussed in this article aim to address the urgent need for efficient lithium extraction from high MLR brines.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Fang Xu et al.
Summary: By studying nanopores in covalent organic frameworks, it is found that compensatory effect of pore-wall groups on ionic hydration plays a significant role in lithium-magnesium separation; meanwhile, moderately-electropositive nanopores can enhance separation factor and lithium ion permeation simultaneously. The balanced ratio of hydrophilic and positively-charged groups on pore walls is crucial for improving lithium-magnesium separation efficiency.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Dan Lu et al.
Summary: A surface charge-inversion strategy was developed to construct a selective positive-nanolayer on nanofiltration membranes surface for selective separation of lithium ions, addressing the low lithium selectivity and complicated preparation issues. This strategy enhances the Donnan exclusion and size sieving capability for Mg2+ ions, achieving a high separation factor and anti-fouling performance.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Linxiao Hou et al.
Summary: This study decouples the effects of charge density from pore structure using a multivariate strategy to construct covalent organic framework-based membranes. The impact of charged sites density in nanofluidic membranes on ion transport activity, particularly focusing on Li+ and Mg2+ ions relevant to salt-lake lithium mining challenge, is systematically investigated. The synthesized membranes show outstanding selectivity for Li+ over Mg2+ and operational stability, making them potential candidates for lithium extraction and other controlled separation processes.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Huawen Peng et al.
Summary: A new strategy for preparing positively charged nanofiltration membranes has been reported, which shows ultrapermeable and selective separation of lithium ions from concentrated magnesium/lithium mixtures. The modification of the membranes with a new electrolyte monomer improves water permeance and stability in continuous nanofiltration. High lithium flux has been achieved at 6 bar operation pressure.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Chemical
Ping Xu et al.
Summary: The addition of nano-sized aminated graphene quantum dots has been shown to effectively enhance the Mg2+/Li+ separation ability of NF membranes, increase membrane permeation flux, and provide strong anti-fouling and stability properties.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Ankang Xiao et al.
Summary: This study presents a method for efficient desalination through the construction of bi-layered COF nanofilms by secondary growth, allowing easy regulation of the growth of an additional layer on the pre-synthesized first layer. The resulting nanofilms exhibit crystalline and defect-free structures with enhanced ion separation performance, showcasing potential for improving membrane separations using COF platforms.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Jue Hou et al.
Summary: Lithium extraction from brine and ores can harm the environment due to the use of large amounts of chemicals and waste discharge. Metal-organic framework (MOF)-based membranes are a promising solution for lithium extraction with their uniform pore sizes, high porosity, and rich chemistry. Recent advances in polycrystalline MOF membranes, mixed matrix membranes, and MOF channel membranes for lithium-ion separation have been discussed, pointing towards future opportunities and challenges in this emerging research field.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Fangmeng Sheng et al.
Summary: Research demonstrates that COF membranes with a channel size of approximately 1.4 nm exhibit efficient ion sieving properties, with high monovalent cation permeation rates and low multivalent cation permeabilities.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Zong Lu et al.
Summary: The study involves the creation of a 2D laminar membrane with Li+ selective transport channels by stacking MXene nanosheets with poly(sodium 4-styrene sulfonate) (PSS) containing active sulfonate sites. This membrane shows excellent Li+ selectivity in ionic mixture solutions and high Li+ permeation rate. The selective and rapid transport of partially dehydrated Li+ within subnanochannels is attributed to precisely controlled interlayer spacing and weaker ion-terminal interaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Inorganic & Nuclear
Penghui Zhang et al.
Summary: iCOFs are an emerging type of crystalline organic polymers that consist of the ionic skeleton and corresponding counterions. They combine the benefits of both porous ionic polymers and COFs, demonstrating great potential in ion conduction, adsorption, separation, catalysis, and sensing. Opportunities and challenges of iCOFs were analyzed in detail for understanding future prospects.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Physical
Jianliang Shen et al.
Summary: In this study, a series of bilayer COF membranes with homointerface and heterointerface were designed, achieving efficient desalination performance through manipulating the interface confinement effect. The rejection rate of homointerface COF membrane toward Na2SO4 was higher than that of heterointerface COF membranes due to the synergistic enhancement of interface-confined size sieving and Donnan effect. The homointerface TpPa-SO3H/TpPa-SO3H/MPAN membrane exhibited the highest reported performance among COF desalination membranes, with a rejection rate of 98.3% for Na2SO4 and water flux of 13.1 L m(-2) h(-1) bar(-1).
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Zhen Li et al.
Summary: This study has successfully enriched lithium from seawater by 43,000 times using a solid-state electrolyte membrane and a continuous electrically-driven membrane process, meeting the purity requirements for the lithium battery industry and showing profitability when coupled with the Chlor-alkali industry.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Engineering, Chemical
Changsheng Guo et al.
SEPARATION AND PURIFICATION TECHNOLOGY
(2020)
Review
Chemistry, Multidisciplinary
Alberto Battistel et al.
ADVANCED MATERIALS
(2020)
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Huanhuan Wu et al.
JOURNAL OF MEMBRANE SCIENCE
(2020)
Article
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Jun Lu et al.
Article
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Ping Xu et al.
Article
Multidisciplinary Sciences
Xuechen Zhou et al.
Review
Chemistry, Multidisciplinary
D. Rodriguez-San-Miguel et al.
CHEMICAL SOCIETY REVIEWS
(2020)
Review
Chemistry, Multidisciplinary
Shaofei Wang et al.
CHEMICAL SOCIETY REVIEWS
(2020)
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Hong-Ju Da et al.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
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Zhifang Wang et al.
ACS CENTRAL SCIENCE
(2019)
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Yufeng Wang et al.
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CHEMICAL ENGINEERING JOURNAL
(2018)
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Pengfei Wang et al.
NATURE COMMUNICATIONS
(2018)
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David G. Mackanic et al.
ADVANCED ENERGY MATERIALS
(2018)
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Devin L. Shaffer et al.
JOURNAL OF MEMBRANE SCIENCE
(2017)
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SEPARATION AND PURIFICATION TECHNOLOGY
(2017)
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Benyu Qi et al.
NATURE COMMUNICATIONS
(2017)
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JOURNAL OF MATERIALS CHEMISTRY A
(2017)
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Xianhui Li et al.
Review
Chemistry, Physical
Zhigang Xue et al.
JOURNAL OF MATERIALS CHEMISTRY A
(2015)
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Shu-Ying Sun et al.
JOURNAL OF WATER PROCESS ENGINEERING
(2015)
