DESALINATION
·
2026
·
IF 9.9
Haoran Zhang,Qingbai Chen,Jinye Zhang,Di Wang,Ping Li,Haoxue Wang,Min Zhang,Yong Xu,Jianyou Wang,Zhenliang Xu
Innovatively developed an “adhesion-assisted growth” strategy for fabricating MOF membranes. • Constructed dual-confined ion channels enabling highly selective lithium-ion transport. • Implemented seed implantation in the adhesive layer to induce rapid and well-ordered MOF growth. • Established interconnected interface architecture forming continuous ion transport networks. • The developed membrane exhibits excellent long-term operational stability. Membranes featuring ordered biomimetic ion channels have been widely explored for ion-sieving applications, such as lithium extraction from salt-lake brines, seawater desalination, and energy conversion. However, achieving high ion permselectivity while enabling scalable fabrication for industrial use remains a major challenge. Here, we report a dual-confined metal-organic framework (MOF) membrane fabricated via an “adhesion-assisted growth” strategy. By integrating biomimetic ion channels functionalized with acidic groups, precise pore-size control, and surface chemical modulation, the membrane establishes a dual-nanoconfined separation system that simultaneously enables efficient Li + transport and effective Mg 2+ rejection. This specially designed adhesive layer not only promotes the well-defined formation of the MOF layer but also creates an interconnected ion transport network, thereby accelerating ion migration during selective electrodialysis (SED). Consequently, the resulting MOF membrane achieves a Li + flux of 1.17 mol·m −2 ·h −1 and exhibits a Li + /Mg 2+ permselectivity 14.3 times higher than that of the unmodified membrane, alongside excellent long-term operational stability. This environmentally friendly lithium extraction strategy advances the development of high-performance separation membranes and holds great promise for key applications such as lithium recovery from salt-lake brines, offering an innovative technological pathway toward efficient strategic resource recovery and the advancement of a circular economy. The synergistic dual-confined mechanism governs the selective Li + /Mg 2+ sieving performance of the MOF membrane. Download: Download high-res image (146KB) Download: Download full-size image
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高影响因子
INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 35
·20464-20471
·
IF 4.6
Sun Ling,Gao Zhanyong,Li Huimin,Xu Xinyi,Zhao Di,Li Huanrong
Silver nanoclusters (AgNCs) with
exceptional luminescence
suffer
from an aggregation-induced loss of their unique quantum confinement
effects. LTA zeolites are ideal hosts for stabilizing AgNCs, yet most
reported water-responsive AgNC@LTA systems only exhibit binary luminescence
switching, restricting high-resolution multilevel environmental monitoring.
Herein, we construct a Mg 2+ -regulated AgNC@LTA system via
sequential ion exchange and thermal treatment. The as-prepared Ag-LTA(Na/Mg)
achieves continuous three-state luminescence switching with yellow
emission in dehydration, red in slight hydration, and green in full
hydration. Mechanistic studies reveal that Mg 2+ isolates
AgNCs, blocks framework-to-cluster charge transfer, and stabilizes
the intermediate excited state. The luminescence was confirmed as
phosphorescence. This material realizes a naked-eye-resolvable color
transition over 0%–60% relative humidity with excellent reversibility,
breaking the binary limitation and offering an avenue for high-precision
visual humidity sensors.
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高影响因子
ACS Nano
·
2026
·
IF 17.3
Yu Wu,Bowen Jin,Lin Sun,Shimeng Zhang,Jin Ye,Jianxiong Gao,Zhilong Wang,Xinyu Zhao,Mingliang Zuo,Mingfei Shao
Rechargeable magnesium-metal batteries (RMBs) have been regarded as promising candidates for energy storage systems owing to the high volumetric capacity, favorable safety profile, and high crustal abundance of Mg. However, the performance of RMBs is constrained by sluggish Mg2+ diffusivity in the cathode materials, leading to a substantial electrochemically inactive interior volume. Herein, we achieved the fast solid-state diffusion of Mg2+ by constructing an ordered shell-to-core built-in electric field (BEF) via orientated MoS2/MoO2 coaxial heterojunction nanotube arrays, giving rise to high capacity even at low temperatures. Benefiting from the easy transport and deep intercalation depth of Mg2+, the obtained cathode delivered an outstanding rate performance (312 mAh g–1 at 0.05 A g–1 and 115 mAh g–1 at 5 A g–1) and long-term durability with an average fade of 0.0025% per cycle over 4000 cycles. Impressively, a capacity of 150 mAh g–1 was still retained at 0.05 A g–1 even at −20 °C because of the maintained largely promoted Mg2+ diffusivity of 10–10 cm2 s–1 at this low temperature, which is promising but rarely reported for RMBs.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Jun Wei,Xinyu Ma,Fengrui Yang,Shuwei Jia,Zhi Wang
Efficient separation of Mg 2+ /Li + is the key to extracting lithium resources from salt lakes. In this work, a symmetrical bis-quaternary ammonium salt (quaternized 1, 4-dimethylpiperazine, QDMPIP) monomer was synthesized and grafted to the surface of a polyamide nanofiltration membrane. By modulating the grafting amount of QDMPIP monomers, the membrane properties—including positive charge density, pore size, and hydrophilicity—were tailored. The surface of optimally QDMPIP-grafted membrane has a strong positive property, which can reduce Mg 2+ /Li + from 50 (feed) to 0.85 (permeate), and the corresponding S Mg2+/Li + reaches 58.5, which is 7.4 times that of the unmodified membrane. Remarkably, the flux remained comparable to the pristine membrane, while achieving a MgCl 2 rejection rate exceeding 93 % at 6000 ppm. In addition, the grafting of QDMPIP also improves the crosslinking degree of the membrane surface, which makes it have stable performance at complex operating pressures. Owing to its exceptional separation efficiency, high stability, and straightforward fabrication process, the QDMPIP-modified membrane demonstrates great industrialization potential in the extraction of lithium resources from salt lakes with a high Mg 2+ /Li + ratio.
研究领域:
材料科学
·
化学工程
·
环境科学
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Haofan Wang,Zhifei Wu,Xu Zhang,Li Liu,Deqing Liu,Jin Ran,Dawei Zhang
Conventional polymer anion exchange membranes (AEMs) suffer from the permeability-selectivity trade-off in diffusion dialysis (DD), limiting their efficiency in critical resource recovery scenarios (e.g., acid recycling and Li + extraction). To overcome this, this study incorporated polyaniline-modified MXene (PANI-Ti 3 C 2 T X ) nanosheets as transformative fillers into quaternized polyphenylene oxide (QPPO). The resulting PANI-Ti 3 C 2 T X -QPPO membranes enable dual-function DD for H + /metal cations and Li + /Mg 2+ separation. First, the as-prepared membranes exhibited enhanced microphase separation, yielding expanded hydrophilic domains (13.95–14.8 nm vs. 12.5 nm in pristine QPPO). Moreover, the 1.0 %-PANI-Ti 3 C 2 T X -QPPO membrane (with 1.0 wt% filler loading) achieved a peak ion exchange capacity of 1.75 mmol g −1 . For H + /metal cations separation: in HCl/FeCl 2 mixture, the H + dialysis coefficient ( U H ) reached 1.39–1.50 × 10 −2 m h −1 (2.7–2.9 times higher than the commercial TWDDA3S, 0.52 × 10 −2 m h −1 ); in HCl/AlCl 3 mixture, U H reached 1.50–1.53 × 10 −2 m h −1 , combined with exceptional selectivity ( S H/Al = 1568.4–1805.8), outperforming both TWDDA3S ( U H = 0.94 × 10 −2 m h −1 , S H/Al = 1423.8) and pristine QPPO ( U H = 1.27 × 10 −2 m h −1 , S H/Al = 1117). Finally, for Li + /Mg 2+ separation, the membranes delivered enhanced Li + flux with competitive S Li/Mg (11.4–12.4) against TWDDA3S (11.4) and QPPO (11.8). This study demonstrates that PANI-Ti 3 C 2 T X and QPPO synergistically overcome the permeability-selectivity trade-off in polymer membranes.
研究领域:
膜科学与技术
·
分离工程
·
材料化学
·
资源回收
·
离子传输
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Tiansheng Gao,Yuqian Yang,Wenzhong Ma,Xiaoyi Zhang,Haicun Yang,Qiuyan Bi,Jing Zhong,Hideto Matsuyama
Positively charged nanofiltration membranes effectively extract lithium resources from brine due to their excellent ion selectivity. However, current positively charged nanofiltration membranes generally suffer from low permeation flux and poor lithium ion transport efficiency. To address these issues, constructing nanoscale channels with precise ion sieving capability within nanofiltration membranes has become a recent research focus. In this study, a novel nanochannel material—quaternized γ-cyclodextrin (Q-γ-CD)—was synthesized. Q-γ-CD contains positively charged quaternary ammonium groups on its surface, which can enhance the positive charge density of the membrane surface, thereby improving the rejection of divalent cations (such as Mg 2+ ). Meanwhile, the cavity size and hydrophobic inner cavity of Q-γ-CD provide rapid transport pathways for lithium ions and water molecules. By introducing Q-γ-CD into an aqueous solution containing polyethyleneimine (PEI) and using trimesoyl chloride (TMC) as the organic-phase monomer, a high-performance PEI/Q-γ-CD/TMC nanofiltration membrane was fabricated. Under optimal formulation conditions, the fabricated nanofiltration membrane exhibited a thin separation layer (≤100 nm), a pore size of approximately 0.45 nm, and a high surface charge (isoelectric point, ≥ 9). Thanks to the precise ion-sieving nanochannels provided by Q-γ-CD, the membrane’s pure water flux increased to 13.34 L·m −2 ·h −1 ·bar −1 , while the rejection of magnesium ions reached 97.8 %, and the Li + /Mg 2+ separation factor achieved a value of 18.5. This study presents a novel design strategy for positively charged nanofiltration membranes, offering theoretical support and practical guidance for achieving efficient magnesium-lithium separation.
研究领域:
膜科学
·
分离技术
·
材料科学
·
化学工程
·
环境科学
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Qingji Wang,Yilin Wang,Dan Wang,Xueying Yang,Ying Tang,Mingna Feng,Mingxia Wang,Xuemin Li,Feng Yan
Nanofiltration (NF) stands as a pivotal method for lithium resource recovery. Nonetheless, traditional NF membranes predominantly rely on size exclusion and the Donnan effect, necessitating elevated operating pressures and encountering substantial hurdles in terms of ion selectivity for lithium ions. Inspired by the host–guest recognition of crown ethers toward alkali metal ions, we prepared a crown ether-functionalized loose NF membrane (CE-LNF) via interfacial polymerization of diamino-dibenzo-14-crown-4 (DAB14C4) and trimesoyl chloride on a chloromethylated polysulfone substrate. The preparation conditions of the CE-LNF membranes were systematically optimized. Results revealed that the polyamide (PA) layer structure could be precisely tuned by changing the solvent and concentration of DAB14C4. The diffusion dialysis process with low energy consumption was applied in the Mg2+/Li+ separation experiment. Interestingly, the CE-LNF membrane achieved a unique “Li+ repulsion-Mg2+ permeation” result owing to the efficient host–guest recognition of Li+ by DAB14C4 on the PA layer. During the diffusion process, the transmembrane flux of Mg2+ (0.5 mol·m–2·h–1) surpassed that of Li+ (0.01 mol·m–2·h–1) by 50-fold, leading to a significant reduction in the Mg2+/Li+ ratio in the feed (from 19.5:1 to 5.2:1) and generating a Mg2+-enriched permeate. This work proposes a novel strategy for Mg2+/Li+ separation, where CE-LNF-based continuous diffusion dialysis serves as an energy-efficient, nonpressure-driven pretreatment for high Mg2+/Li+ ratio brines. The process not only produces high-purity Mg2+ solutions but also facilitates subsequent Li+ recovery via secondary CE-LNF diffusion or conventional extraction methods.
研究领域:
膜科学
·
分离技术
·
材料科学
·
化学工程
·
环境科学
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shuoshuo Yang,Yuhua Huang,Yonggang Lv
Owning to seriously impaired capacity of bone regeneration, the repair of osteoporotic bone defect remains a major clinical challenge in orthopedics. For titanium mesh scaffolds of skull repair, to construct bio-coatings targeting the pathological environment of osteoporosis is significant. Here, tannic acid (TA)/casein phosphopeptide (CPP) based layer-by-layer (LBL) self-assembled coating that loaded with anti-osteoporotic alendronate sodium (AS) and bioactive Mg 2+ were prepared. The TA/CPP based LBL coatings showed good antioxidative function to effectively clear ABTS +• free radicals (scavenging rate of 64.29 ± 20.21 %) and inhibited the production of reactive oxygen species (ROS) in bone marrow mesenchymal stem cells (BMSCs) under oxidative stress conditions. All the LBL coatings exhibited good blood compatibility, and promoted early adhesion of BMSCs without affecting cell proliferation. In particular, the (TA/CPP-AS NPs) 4 + Mg 2+ coatings had both good alkaline phosphatase (ALP) activity and in vitro osteogenic mineralization, and could effectively promote the migration of human umbilical vein endothelial cells (HUVECs). In 8-weeks in vivo implantation experiments of osteoporotic skull defects, AS and Mg 2+ loaded LBL coating showed significant formation of new bone tissue. The study on the integrated system of antioxidative coating with bisphosphonates and active metal ions will serve as a promising strategy for osteoporotic bone defect repair.
研究领域:
生物材料学
·
骨科医学
·
再生医学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zejun Song,Zhenggong Wang,Yanshao Yang,Jiaqi Zhang,Wangxi Fang,Jian Jin
Lithium, a highly sought-after element for various industries, is primarily sourced from salt-lake brines, where its extraction faces the critical challenge of separating Li + from high concentrations of Mg 2+ . In this work, we present a crown ether functionalized polymer membrane with a hierarchical pore structure, designed for highly selective Li + /Mg 2+ separation. By grafting 12-crown-4-ether onto a microporous polyimide, ether rings matching the size of Li + are incorporated within the interconnected intrinsic micropores, facilitating Li + permeation while restricting Mg 2+ transport. The addition of PEG4000 during membrane formation creates unconnected macropores, reducing effective membrane thickness while preventing pore linkages that could lead to Mg 2+ leakage. Consequently, the Li + permeation rate significantly increases from 0.0095nmol cm −1 s −1 to 0.257 nmol cm −1 s −1 , while Mg 2+ permeation remains low at 0.0014 nmol cm −1 s −1 , achieving a remarkable Li + /Mg 2+ selectivity of up to 184. This study offers a straightforward and efficient approach for developing Li + selective membranes for efficient lithium extraction.
研究领域:
材料科学
·
环境工程
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Keting Li,Yufan Hao,Na Yang,Longfei Zhang,Luhong Zhang,Yongli Sun,Bin Jiang
Polyethyleneimine (PEI) nanofiltration (NF) membranes demonstrate remarkable effectiveness in separating lithium and magnesium from salt lakes, attributed to their positively charged surface. However, undesired permeability resulting from densely cross-linked structures limits the further industrial applications and development of PEI NF membranes. Herein, a high permeable Mg 2+ /Li + separation NF membrane with stronger internal and surface positive charge was fabricated using 1-Aminopyridinium iodide (1-AI) for the first time through a capping-grafting synergistic strategy. On the one hand, the monoamine character of 1-AI can realize the end-capping (EC) effect on the acyl chloride monomers in the interfacial polymerization process, which can contribute to a reduction in the cross-linking degree of the membrane. On the other hand, 1-AI with a quaternary ammonium group as the surface grafting (SG) agent can significantly improve the surface positive charge property of the membrane. The synergistic effect of capping-grafting not only rendered the membrane looser and effectively enhanced the surface positive charge of the membrane, but also increased the depth of grafting modification, leading to a notable rise in the internal positive charge of the membrane. After the capping-grafting treatment, the water permeance of the PEI-EC/SG membrane reached 19.8 L·m −2 ·h −1 ·bar −1 , approximately 4.5 times that of the original PEI membrane, while keeping an ideal MgCl 2 rejection rate (97.1%) and exhibiting good Mg 2+ /Li + selectivity (27.7). This work demonstrates the advantages of the capping-grafting synergistic method in regulating membrane structure for improving permeability as well as the surface and internal charge properties of the membrane for enhancing ion selectivity.
研究领域:
材料科学
·
化学工程
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高影响因子
ChemSusChem
·
2024
·
IF 7.5
Yanan Dong,Ju Bai,Luqi Xiao,Shangqing Chen,Lu Bai,Huaigang Cheng,Linglong Shan,Junfeng Wang,Yi Nie
Graphical Polyethyleneimine (PEI)-templated ZIF-8 (PEI-ZIF-8) was synthesized and incorporated into the PEI aqueous solution, then interfacial polymerized with trimesoyl chloride (TMC) to obtain the PEI-ZIF-8 modified polyamide NF membrane. The optimal PEI-ZIF-8-TMC membrane exhibits a permeance of 9 L/h m 2 bar and a Mg 2+ /Li + separation factor (SF) of 19. MOFs-modified nanofiltration (NF) membranes have been gained a lot of attention due to their favorable permeability and ion separation performance. Nevertheless, the prevailing preparation techniques are afflicted by the incompatibility of MOFs with polymers and the facile loss of MOFs. In this work, polyethyleneimine (PEI)-templated ZIF-8 (PEI-ZIF-8) was synthesized and incorporated into the PEI aqueous solution, then interfacial polymerized with trimesoyl chloride (TMC) to obtain the PEI-ZIF-8 modified polyamide NF membrane. This PEI modified strategy could endow the ZIF-8 nanoparticles with positively charged properties to avoid the aggregation and increase the interfacial compatibility with the polyamide. Meanwhile, the appropriate pore size of ZIF-8 (3.4 Å), which is between the hydration sheath surrounding of Li + (2 Å) and Mg 2+ (4.2 Å) impart the membrane with precise Mg 2+ /Li + separation ability. The optimal PEI-ZIF-8-TMC membrane exhibits a permeance of 9 L/h m 2 bar and a Mg 2+ /Li + separation factor (SF) of 19, both of which surpass the performance of the pure PEI-TMC membrane, which has a permeance of 4 L/h m 2 bar and a Mg 2+ /Li + separation factor of 11. Meanwhile, the membrane exhibited excellent long-term stability of 85 h. This novel approach to preparing MOFs-modified NF membrane represents a promising avenue for the separation of lithium and magnesium.
研究领域:
材料科学
·
分离技术
·
纳米科技
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PubMed
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Jian Dong,Yi Wang,Liangliang Dong,Tatsuo Kaneko,Weifu Dong,Dongjian Shi,Mingqing Chen
To address the membrane challenges such as the trade-off effect between water permeance and separation selectivity, development of a desirable nanofiltration membrane structure is crucial. And, it is important to design a positively charged surface to enhance charge repulsion force between membrane surface and ions due to lithium (Li) extraction problem as the close hydration diameter of magnesium (Mg) and lithium ions. Herein, a strategy that involves regulating membrane structure to create a loose and dense double-layer structure via bi-directional interfacial polymerization has been proposed to form selectivity-enhanced nanofiltration membranes for Li + /Mg 2+ separation. The incorporation of dopamine (DA) and trimesoyl chloride (TMC) in first loose layer could improve the membrane stability, while the amine groups from polyethyleneimine (PEI) or polyvinylamine (PVAm) in the second dense layer surface, provided by rich amine polymers, could improve the rejection of divalent magnesium ion. The as-fabricated membrane DA-TMC-PEI shows enhanced permeance (around 15.4 L m −2 h −1 bar −1 ) and the membrane DA-TMC-PVAm demonstrates outstanding ion selectivity with Li + /Mg 2+ separation factor of 30. Moreover, the DA-TMC-PEI and DA-TMC-PVAm membranes could efficiently purify the ratio of Mg 2+ /Li + solution from 50 to 0.43. We believe the strategy could provide a promising potential in lithium extraction.
研究领域:
材料科学
·
环境工程
·
化学工程
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高影响因子
危险品化学品经营许可证（带存储）