Pub Date : 2025-10-23DOI: 10.1016/j.advmem.2025.100181
Yuchao Yang , Bengui Zhang , Qian Liu , Zhenfeng Sun , Chao Yang , Tao Li , Songwei Zhang , Jingjun He , Feixiang Zhai , Zhihan Song , Enlei Zhang , Kangjun Wang
Vanadium redox flow batteries (VRFBs) are emerging as large-scale energy storage devices to solve volatility in the utilization of renewable energy. As key components of VRFBs, membranes still suffer from problems such as high cost, low conductivity, or insufficient stability. Pyridine-containing poly (aryl ether)s have the advantages of low monomer cost, simple synthesis process, and easy processing into membranes. In this work, a series of pyridine-containing poly (aryl ether) (PyPEK, PyPES, and PyPEF) based on different backbones (4,4′-difluorobenzophenone, 4,4′-dichlorodiphenyl sulfone, and perfluorobiphenyl) were synthesized. The effects of the backbones on the membrane swelling behavior, basic membrane properties, battery performance, and stability of the membranes were studied. The PyPEF membrane exhibited excellent battery performance (EE = 93.78 % at 80 mAcm−2, EE = 86.24 % at 200 mAcm−2, and EE = 80.25 % at 300 mAcm−2) and excellent cycling stability (3000 cycles) in VRFB, which is highly attractive for application in VRFB.
{"title":"Enhanced stability of pyridine-containing poly(arylene ether) membranes for vanadium redox flow battery: influence of backbone structure","authors":"Yuchao Yang , Bengui Zhang , Qian Liu , Zhenfeng Sun , Chao Yang , Tao Li , Songwei Zhang , Jingjun He , Feixiang Zhai , Zhihan Song , Enlei Zhang , Kangjun Wang","doi":"10.1016/j.advmem.2025.100181","DOIUrl":"10.1016/j.advmem.2025.100181","url":null,"abstract":"<div><div>Vanadium redox flow batteries (VRFBs) are emerging as large-scale energy storage devices to solve volatility in the utilization of renewable energy. As key components of VRFBs, membranes still suffer from problems such as high cost, low conductivity, or insufficient stability. Pyridine-containing poly (aryl ether)s have the advantages of low monomer cost, simple synthesis process, and easy processing into membranes. In this work, a series of pyridine-containing poly (aryl ether) (PyPEK, PyPES, and PyPEF) based on different backbones (4,4′-difluorobenzophenone, 4,4′-dichlorodiphenyl sulfone, and perfluorobiphenyl) were synthesized. The effects of the backbones on the membrane swelling behavior, basic membrane properties, battery performance, and stability of the membranes were studied. The PyPEF membrane exhibited excellent battery performance (EE = 93.78 % at 80 mAcm<sup>−2</sup>, EE = 86.24 % at 200 mAcm<sup>−2</sup>, and EE = 80.25 % at 300 mAcm<sup>−2</sup>) and excellent cycling stability (3000 cycles) in VRFB, which is highly attractive for application in VRFB.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"6 ","pages":"Article 100181"},"PeriodicalIF":9.5,"publicationDate":"2025-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145398635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-23DOI: 10.1016/j.advmem.2025.100179
Wenjing Ma , Zixin Lv , Xiaowei Zhou , Junhao Xin , Huifeng Wang , Zhiguang Zhang , Xiuling Chen , Nanwen Li
Membrane-based solid polymer electrolytes (SPEs) have emerged as promising candidates for enhancing the energy density and safety of lithium metal battery (LMBs), owing to their superior Li-salt dissociation capability, excellent lithium metal anode compatibility, and cost-effectiveness. However, conventional SPEs often suffer from limited thermal stability, low ionic conductivity, and inadequate mechanical strength. In this study, we developed a novel polymeric membrane incorporating CF3 and amide functional groups, which was subsequently imbibed with lithium salt and solvents to form a homogeneous ternary electrolyte system of polymer/solvent/lithium-ion solvated membranes (ISMs). The resulting ion solvated membranes exhibit remarkable mechanical properties, high ionic conductivity and high security. The amide groups effectively anchor anions and coordinate with Li+, while the strong electron-withdrawing effect of -CF3 groups facilitates the formation of efficient Li + transport channels. Density functional theory (DFT) calculations confirmed that lithium ions preferentially bind to the amide and -CF3 groups rather than solvent molecules, The binding energy between co-FPA and Li+ was calculated to be −3.40 eV, indicating a strong interaction. ISMs demonstrate outstanding electrochemical performance, achieving an ionic conductivity of 1.845 × 10−4 S cm−1 and a high Li + transference number of 0.66. When assembled into Li/co-FPA-50/LFP cells, the system maintains 93 % capacity retention after 200 cycles at 0.5C (initial capacity: 158.6 mAh g−1). The ISM-based quasi-solid-state lithium batteries exhibit exceptional long-term cycling stability over 1000 cycles. This work presents an innovative approach for designing high-performance ion solvated membranes, addressing critical challenges in the development of safe and stable lithium metal batteries.
膜基固体聚合物电解质（spe）由于其优异的锂盐解离能力、优异的锂金属阳极兼容性和成本效益，已成为提高锂金属电池（lmb）能量密度和安全性的有希望的候选者。然而，传统的spe通常存在热稳定性有限、离子电导率低和机械强度不足的问题。在本研究中，我们开发了一种含有CF3和酰胺官能团的新型聚合物膜，随后将其与锂盐和溶剂一起吸收，形成聚合物/溶剂/锂离子溶剂化膜（ISMs）的均相三元电解质体系。所得离子溶剂化膜具有优异的力学性能、高离子电导率和高安全性。酰胺基团有效地锚定阴离子并与Li+配位，而-CF3基团的强吸电子效应有利于形成高效的Li+输运通道。密度泛函理论（DFT）计算证实，锂离子优先结合酰胺和-CF3基团而不是溶剂分子，co-FPA与Li+之间的结合能为- 3.40 eV，表明相互作用强。ISMs具有优异的电化学性能，离子电导率为1.845 × 10−4 S cm−1，Li +迁移数为0.66。当组装成Li/co-FPA-50/LFP电池时，系统在0.5C下循环200次后保持93%的容量保持（初始容量：158.6 mAh g−1）。基于ism的准固态锂电池表现出超过1000次循环的长期稳定性。这项工作提出了一种设计高性能离子溶剂化膜的创新方法，解决了开发安全稳定的锂金属电池的关键挑战。
{"title":"Fluorinated polyamide-based ion-solvating membranes for long-cycle quasi-solid-state lithium batteries","authors":"Wenjing Ma , Zixin Lv , Xiaowei Zhou , Junhao Xin , Huifeng Wang , Zhiguang Zhang , Xiuling Chen , Nanwen Li","doi":"10.1016/j.advmem.2025.100179","DOIUrl":"10.1016/j.advmem.2025.100179","url":null,"abstract":"<div><div>Membrane-based solid polymer electrolytes (SPEs) have emerged as promising candidates for enhancing the energy density and safety of lithium metal battery (LMBs), owing to their superior Li-salt dissociation capability, excellent lithium metal anode compatibility, and cost-effectiveness. However, conventional SPEs often suffer from limited thermal stability, low ionic conductivity, and inadequate mechanical strength. In this study, we developed a novel polymeric membrane incorporating CF<sub>3</sub> and amide functional groups, which was subsequently imbibed with lithium salt and solvents to form a homogeneous ternary electrolyte system of polymer/solvent/lithium-ion solvated membranes (ISMs). The resulting ion solvated membranes exhibit remarkable mechanical properties, high ionic conductivity and high security. The amide groups effectively anchor anions and coordinate with Li<sup>+</sup>, while the strong electron-withdrawing effect of -CF<sub>3</sub> groups facilitates the formation of efficient Li <sup>+</sup> transport channels. Density functional theory (DFT) calculations confirmed that lithium ions preferentially bind to the amide and -CF<sub>3</sub> groups rather than solvent molecules, The binding energy between co-FPA and Li<sup>+</sup> was calculated to be −3.40 eV, indicating a strong interaction. ISMs demonstrate outstanding electrochemical performance, achieving an ionic conductivity of 1.845 × 10<sup>−4</sup> S cm<sup>−1</sup> and a high Li <sup>+</sup> transference number of 0.66. When assembled into Li/co-FPA-50/LFP cells, the system maintains 93 % capacity retention after 200 cycles at 0.5C (initial capacity: 158.6 mAh g<sup>−1</sup>). The ISM-based quasi-solid-state lithium batteries exhibit exceptional long-term cycling stability over 1000 cycles. This work presents an innovative approach for designing high-performance ion solvated membranes, addressing critical challenges in the development of safe and stable lithium metal batteries.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"6 ","pages":"Article 100179"},"PeriodicalIF":9.5,"publicationDate":"2025-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145475968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-22DOI: 10.1016/j.advmem.2025.100178
Renqiang Cao , Feng Duan , Wenyan Ji , Jingya Yin , Yujiao Li , Shaoyuan Shi , Yuping Li , Hongbin Cao
Organic fouling of anion exchange membranes (AEMs) severely limits the large-scale application of electrodialysis (ED) in industrial wastewater resource recovery, primarily due to the compromised engineering feasibility of ex-situ modifications requiring stack disassembly. To address this, we developed an efficient strategy enabling in-situ directional construction of an interfacial polymerization (IP) modified layer within ED stacks, significantly enhancing AEM antifouling performance. This approach leverages direct-current electric field to directionally deposit tannic acid (TA) onto AEM surfaces, followed by injection of trimesoyl chloride (TMC) to initiate polymerization, enabling in-situ constructing of IP-modified layers. Optimized conditions yielded [email protected] g/L-AEM (TMC: 1.0 g/L) with maximized esterification degree and surface charge density (−31.25 mV), exhibiting superior antifouling performance. In sodium dodecyl sulfonate (SDS) fouling tests, [email protected] g/L maintained 24.29 % higher desalination rate than pristine membrane stacks at 120 min and exhibited exceptional operational stability (>1200 min). Mechanistic analysis revealed that the in-situ IP-modified layer synergistically suppresses foulant aggregation in the diffusion boundary layer through enhanced surface negative charge density and stability compared to solely electrodeposited TA. This work provides a scalable approach for in-situ construction of modified layers within ED stacks.
{"title":"Enhanced antifouling performance of anion exchange membrane via in-situ constructed interfacial polymerization modified layer within electrodialysis stack","authors":"Renqiang Cao , Feng Duan , Wenyan Ji , Jingya Yin , Yujiao Li , Shaoyuan Shi , Yuping Li , Hongbin Cao","doi":"10.1016/j.advmem.2025.100178","DOIUrl":"10.1016/j.advmem.2025.100178","url":null,"abstract":"<div><div>Organic fouling of anion exchange membranes (AEMs) severely limits the large-scale application of electrodialysis (ED) in industrial wastewater resource recovery, primarily due to the compromised engineering feasibility of ex-situ modifications requiring stack disassembly. To address this, we developed an efficient strategy enabling in-situ directional construction of an interfacial polymerization (IP) modified layer within ED stacks, significantly enhancing AEM antifouling performance. This approach leverages direct-current electric field to directionally deposit tannic acid (TA) onto AEM surfaces, followed by injection of trimesoyl chloride (TMC) to initiate polymerization, enabling in-situ constructing of IP-modified layers. Optimized conditions yielded [email protected] g/L-AEM (TMC: 1.0 g/L) with maximized esterification degree and surface charge density (−31.25 mV), exhibiting superior antifouling performance. In sodium dodecyl sulfonate (SDS) fouling tests, [email protected] g/L maintained 24.29 % higher desalination rate than pristine membrane stacks at 120 min and exhibited exceptional operational stability (>1200 min). Mechanistic analysis revealed that the in-situ IP-modified layer synergistically suppresses foulant aggregation in the diffusion boundary layer through enhanced surface negative charge density and stability compared to solely electrodeposited TA. This work provides a scalable approach for in-situ construction of modified layers within ED stacks.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"6 ","pages":"Article 100178"},"PeriodicalIF":9.5,"publicationDate":"2025-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145475969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-17DOI: 10.1016/j.advmem.2025.100177
Anniza Cornelia Augusty, Linhua Fan, Seungju Kim
Thermally driven membrane separation processes, such as membrane distillation (MD) and pervaporation (PV), are emerging technologies for desalination and water treatment applications. While both processes offer high separation efficiency and water productivity, their practical applications are often hindered by membrane fouling. In particular, the accumulation of organic foulants on membrane surfaces, resulting from specific interactions between the foulants and the membrane, poses a persistent challenge. This review provides a critical comparison of the fouling mechanisms observed in hydrophobic, porous MD membranes versus hydrophilic, non-porous PV membranes. It further examines recent advancements in membrane material development, including novel membrane designs, surface modifications, and patterning strategies aimed at mitigating organic fouling in both systems. Key challenges and future research directions are also discussed, with a focus on the development of advanced membrane materials and innovative pretreatment and cleaning strategies to enhance the viability of thermally driven membrane technologies in real-world applications.
{"title":"Emerging trends in fouling mitigation for membrane distillation and pervaporation: Implications for desalination and wastewater treatment","authors":"Anniza Cornelia Augusty, Linhua Fan, Seungju Kim","doi":"10.1016/j.advmem.2025.100177","DOIUrl":"10.1016/j.advmem.2025.100177","url":null,"abstract":"<div><div>Thermally driven membrane separation processes, such as membrane distillation (MD) and pervaporation (PV), are emerging technologies for desalination and water treatment applications. While both processes offer high separation efficiency and water productivity, their practical applications are often hindered by membrane fouling. In particular, the accumulation of organic foulants on membrane surfaces, resulting from specific interactions between the foulants and the membrane, poses a persistent challenge. This review provides a critical comparison of the fouling mechanisms observed in hydrophobic, porous MD membranes versus hydrophilic, non-porous PV membranes. It further examines recent advancements in membrane material development, including novel membrane designs, surface modifications, and patterning strategies aimed at mitigating organic fouling in both systems. Key challenges and future research directions are also discussed, with a focus on the development of advanced membrane materials and innovative pretreatment and cleaning strategies to enhance the viability of thermally driven membrane technologies in real-world applications.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"6 ","pages":"Article 100177"},"PeriodicalIF":9.5,"publicationDate":"2025-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145398634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-10-10DOI: 10.1016/j.advmem.2025.100175
Yuling Yang , Yingxin Zhang , Ping Zhu , Lei Tang , Zhixiang Zeng , Lijing Zhu
Underwater superoleophobic characteristics of the membranes have been developed to defeat fouling caused by organic solvents and oils with low viscosity and high volatility in oily wastewater treatment. However, the classic strategy is lacking in fighting for worse membranes caused by viscous/nonvolatile oils and soluble materials such as dyes and antibiotics in wastewater. Hence, a synergistic antifouling mechanism, combining hydrophilicity/low oil adhesive underwater superoleophobicity and advanced oxidation processes (AOPs), is proposed and implemented by CoFe2O4/Fe2O3 nanoparticles anchored on polyvinylidene fluoride/polyacrylic acid (PVDF/PAA) blend membranes against various foulants in wastewater. Briefly, the as-prepared composite membrane not only repels the oils and hydrophobic groups in dyes/antibiotics from adhering to the surface due to its low oil adhesive underwater superoleophobicity and hydrophilicity, but also it can effectively degrade the foulants on the surface and within the pore walls because of its excellent AOPs performances. Specially, after the separation of complex oil-in-water emulsion including soybean oil, methylene blue (MB), and levofloxacin (LEVO), the composite membrane bearing hydrophilicity/underwater superoleophobicity and excellent AOPs has a high flux recovery ratio of 95.4 ± 0.3 % and a low fouling resistance of 0.1 × 1011 m−1. This innovative synergistic antifouling mechanism offers an outstanding anti-fouling membrane for the purification of complex wastewater containing various foulants.
{"title":"Synergizing peroxymonosulfate-activated advanced oxidation processes with underwater superoleophobicity in composite membranes for enhanced anti-fouling in oily wastewater purification","authors":"Yuling Yang , Yingxin Zhang , Ping Zhu , Lei Tang , Zhixiang Zeng , Lijing Zhu","doi":"10.1016/j.advmem.2025.100175","DOIUrl":"10.1016/j.advmem.2025.100175","url":null,"abstract":"<div><div>Underwater superoleophobic characteristics of the membranes have been developed to defeat fouling caused by organic solvents and oils with low viscosity and high volatility in oily wastewater treatment. However, the classic strategy is lacking in fighting for worse membranes caused by viscous/nonvolatile oils and soluble materials such as dyes and antibiotics in wastewater. Hence, a synergistic antifouling mechanism, combining hydrophilicity/low oil adhesive underwater superoleophobicity and advanced oxidation processes (AOPs), is proposed and implemented by CoFe<sub>2</sub>O<sub>4</sub>/Fe<sub>2</sub>O<sub>3</sub> nanoparticles anchored on polyvinylidene fluoride/polyacrylic acid (PVDF/PAA) blend membranes against various foulants in wastewater. Briefly, the as-prepared composite membrane not only repels the oils and hydrophobic groups in dyes/antibiotics from adhering to the surface due to its low oil adhesive underwater superoleophobicity and hydrophilicity, but also it can effectively degrade the foulants on the surface and within the pore walls because of its excellent AOPs performances. Specially, after the separation of complex oil-in-water emulsion including soybean oil, methylene blue (MB), and levofloxacin (LEVO), the composite membrane bearing hydrophilicity/underwater superoleophobicity and excellent AOPs has a high flux recovery ratio of 95.4 ± 0.3 % and a low fouling resistance of 0.1 × 10<sup>11</sup> m<sup>−1</sup>. This innovative synergistic antifouling mechanism offers an outstanding anti-fouling membrane for the purification of complex wastewater containing various foulants.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"6 ","pages":"Article 100175"},"PeriodicalIF":9.5,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145398633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Electrodialysis with anion-exchange membranes (AEMs) is effective for reclaiming alkaline substances from industrial effluents, but conventional AEMs suffer from active group degradation under harsh alkaline conditions. To address this limitation, we designed novel polyarylpiperidine-based AEMs using 1,6-dibromohexane as the cross-linker and incorporating varied side-chain groups. The optimized PBP-co-COOH AEM exhibited exceptional alkali stability: nuclear magnetic resonance confirmed polymeric backbone stability after 1200 h of exposure to 2.0 M NaOH at 80 °C, and thermogravimetric analysis showed minimal mass loss (<8.7 %). In practical electrodialysis (feed concentration: 0.40 M–0.11 M), this membrane achieved a high current efficiency of 90.21 % and low energy consumption of 2.22 kW h kg−1, outperforming the commercial Neosepta AHA membrane (80.31 % current efficiency, 2.75 kW h kg−1 energy consumption) in both metrics. These results demonstrate that modulating ionic moieties in membrane side chains significantly enhances electrodialysis performance. This membrane design provides a promising strategy for developing alkali-resistant AEMs, with valuable implications for optimizing alkaline reclamation processes and advancing industrial-scale applications.
阴离子交换膜电渗析是回收工业废水中碱性物质的有效方法，但传统的阴离子交换膜在恶劣的碱性条件下存在活性基团降解的问题。为了解决这一限制，我们设计了新的基于聚芳基胡椒啶的AEMs，使用1,6-二溴己烷作为交联剂并加入不同的侧链基团。优化后的PBP-co-COOH AEM表现出优异的碱稳定性：核磁共振证实，在2.0 M NaOH在80°C下暴露1200 h后，聚合物骨架稳定，热重分析显示，质量损失最小（< 8.7%）。在实际的电渗析（进料浓度：0.40 M - 0.11 M）中，该膜实现了90.21%的高电流效率和2.22 kW h kg - 1的低能耗，在这两个指标上都优于商业Neosepta AHA膜（80.31%的电流效率，2.75 kW h kg - 1的能耗）。这些结果表明，调节膜侧链中的离子部分可显著提高电渗析性能。这种膜设计为开发耐碱AEMs提供了一种有前途的策略，对优化碱回收工艺和推进工业规模应用具有重要意义。
{"title":"Poly(arylpiperidine) anion-exchange membranes utilizing varied side-chain cross-linking for enhanced electrodialytic ion separation in alkaline waste treatment","authors":"Yazhen Jiang , Yan Zhang , Zhibo Zhang , Yangbo Qiu , Geting Xu , Sisheng Fang , Junbin Liao , Zhishan Chen , Jiangnan Shen , Congjie Gao","doi":"10.1016/j.advmem.2025.100173","DOIUrl":"10.1016/j.advmem.2025.100173","url":null,"abstract":"<div><div>Electrodialysis with anion-exchange membranes (AEMs) is effective for reclaiming alkaline substances from industrial effluents, but conventional AEMs suffer from active group degradation under harsh alkaline conditions. To address this limitation, we designed novel polyarylpiperidine-based AEMs using 1,6-dibromohexane as the cross-linker and incorporating varied side-chain groups. The optimized PBP-co-COOH AEM exhibited exceptional alkali stability: nuclear magnetic resonance confirmed polymeric backbone stability after 1200 h of exposure to 2.0 M NaOH at 80 °C, and thermogravimetric analysis showed minimal mass loss (<8.7 %). In practical electrodialysis (feed concentration: 0.40 M–0.11 M), this membrane achieved a high current efficiency of 90.21 % and low energy consumption of 2.22 kW h kg<sup>−1</sup>, outperforming the commercial Neosepta AHA membrane (80.31 % current efficiency, 2.75 kW h kg<sup>−1</sup> energy consumption) in both metrics. These results demonstrate that modulating ionic moieties in membrane side chains significantly enhances electrodialysis performance. This membrane design provides a promising strategy for developing alkali-resistant AEMs, with valuable implications for optimizing alkaline reclamation processes and advancing industrial-scale applications.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"6 ","pages":"Article 100173"},"PeriodicalIF":9.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145398570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.advmem.2025.100141
Muhammad Inam Bari, Bende Merve Kayhan, Bengü Bozkaya, Aykut Argönül
Reverse osmosis (RO) polyamide membranes are widely used for water treatment applications. However, certain processes such as wastewater reuse require regular membrane cleaning and disinfection with oxidants, which can lead to early membrane degradation. Furthermore, some metal ions present in the water can act as a catalyst for further accelerating the degradation. This early degradation of RO membranes poses significant challenges, resulting in operational inefficiencies, early disposal of membranes, and elevated operational costs. Fortunately, there is the possibility of recovering some part of this performance loss by means of chemical treatment through rejuvenating agents. This study aims to investigate the effectiveness of a commercially available rejuvenating agent containing tannic acid for restoring salt rejection and permeability parameters on degraded thin-film polyamide membranes. The membranes were first degraded using 250 ppm sodium hypochlorite (NaOCl) and 0.05 ppm ferric chloride (FeCl3) at various pH levels (pH = 4, 7 and 9). After applying the rejuvenation treatment to the degraded membranes, the efficiency of the rejuvenating agent was determined based on the improvement achieved for performance testing with respect to salt rejection and permeability. Analytical characterization of the membranes was carried out with Fourier Transform Infrared Spectroscopy-Attenuated Total Reflection (FTIR-ATR). It was found that the chlorine degradation of membranes was accelerated in the presence of FeCl3 at all studied pH levels but more prominently in the acidic region. This acceleration effect was attributed to the formation of (, ) radicals. Under the conditions studied in this work, rejuvenating agent treatment effectively enhanced the salt rejection capability of the degraded membranes but was unable to restore the permeate flux.
{"title":"Rejuvenation of reverse osmosis polyamide membranes degraded by chlorine in the presence of ferric chloride","authors":"Muhammad Inam Bari, Bende Merve Kayhan, Bengü Bozkaya, Aykut Argönül","doi":"10.1016/j.advmem.2025.100141","DOIUrl":"10.1016/j.advmem.2025.100141","url":null,"abstract":"<div><div>Reverse osmosis (RO) polyamide membranes are widely used for water treatment applications. However, certain processes such as wastewater reuse require regular membrane cleaning and disinfection with oxidants, which can lead to early membrane degradation. Furthermore, some metal ions present in the water can act as a catalyst for further accelerating the degradation. This early degradation of RO membranes poses significant challenges, resulting in operational inefficiencies, early disposal of membranes, and elevated operational costs. Fortunately, there is the possibility of recovering some part of this performance loss by means of chemical treatment through rejuvenating agents. This study aims to investigate the effectiveness of a commercially available rejuvenating agent containing tannic acid for restoring salt rejection and permeability parameters on degraded thin-film polyamide membranes. The membranes were first degraded using 250 ppm sodium hypochlorite (NaOCl) and 0.05 ppm ferric chloride (FeCl<sub>3</sub>) at various pH levels (pH = 4, 7 and 9). After applying the rejuvenation treatment to the degraded membranes, the efficiency of the rejuvenating agent was determined based on the improvement achieved for performance testing with respect to salt rejection and permeability. Analytical characterization of the membranes was carried out with Fourier Transform Infrared Spectroscopy-Attenuated Total Reflection (FTIR-ATR). It was found that the chlorine degradation of membranes was accelerated in the presence of FeCl<sub>3</sub> at all studied pH levels but more prominently in the acidic region. This acceleration effect was attributed to the formation of (<span><math><mrow><mo>·</mo><mtext>OH</mtext></mrow></math></span>, <span><math><mrow><mo>·</mo><mtext>OCl</mtext></mrow></math></span>) radicals. Under the conditions studied in this work, rejuvenating agent treatment effectively enhanced the salt rejection capability of the degraded membranes but was unable to restore the permeate flux.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100141"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.advmem.2025.100156
Yuting Wang , Bin Yan , Jiaying Liu , Runkai Wang , Pinhua Rao , Yang Liu
Metal-organic framework (MOF) membranes have emerged as a promising solution for lithium extraction from salt lake brines due to their tunable pore structures and high specific surface areas. Their exceptional selectivity for Li+, combined with efficient extraction and robust performance in complex ionic environments, positions MOF membranes as a key technology for low-concentration lithium extraction. However, meeting industrial-scale demands requires not only enhancing membrane selectivity and permeability, but also addressing long-term stability and reusability under harsh conditions. This review provides a comprehensive overview of recent advances in MOF-based membrane materials for Li+ extraction, focusing on both inorganic and organic substrate-supported configurations. Strategic approaches in structural design such as the selection of metal nodes, ligand modification, and encapsulation of active molecules, and growth control techniques to achieve precise pore architectures are discussed. Furthermore, methods for enhancing membrane robustness through multilayer and composite structures to improve antifouling properties and durability are outlined. Finally, the challenges and emerging trends are also proposed for sustainable and high-efficiency lithium extraction. This work offers valuable insights and theoretical support for the ongoing technical innovation and industrial application of MOF membranes in lithium extraction.
{"title":"Advances in MOF membrane strategies for selective lithium extraction from salt lake brine","authors":"Yuting Wang , Bin Yan , Jiaying Liu , Runkai Wang , Pinhua Rao , Yang Liu","doi":"10.1016/j.advmem.2025.100156","DOIUrl":"10.1016/j.advmem.2025.100156","url":null,"abstract":"<div><div>Metal-organic framework (MOF) membranes have emerged as a promising solution for lithium extraction from salt lake brines due to their tunable pore structures and high specific surface areas. Their exceptional selectivity for Li<sup>+</sup>, combined with efficient extraction and robust performance in complex ionic environments, positions MOF membranes as a key technology for low-concentration lithium extraction. However, meeting industrial-scale demands requires not only enhancing membrane selectivity and permeability, but also addressing long-term stability and reusability under harsh conditions. This review provides a comprehensive overview of recent advances in MOF-based membrane materials for Li<sup>+</sup> extraction, focusing on both inorganic and organic substrate-supported configurations. Strategic approaches in structural design such as the selection of metal nodes, ligand modification, and encapsulation of active molecules, and growth control techniques to achieve precise pore architectures are discussed. Furthermore, methods for enhancing membrane robustness through multilayer and composite structures to improve antifouling properties and durability are outlined. Finally, the challenges and emerging trends are also proposed for sustainable and high-efficiency lithium extraction. This work offers valuable insights and theoretical support for the ongoing technical innovation and industrial application of MOF membranes in lithium extraction.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100156"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144312869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.advmem.2025.100161
Xinchen Xiang , Zheng Cao , Yukun Qian , Dan Lu , Jiancong Lu , Jinyan Wang , Shiyu Zhou , Lijun Liang , Zhikan Yao , Lin Zhang
Nanofiltration (NF) is a rapidly growing field, resulting in a surge of publications with diverse focuses. It's challenging for researchers to quickly find key information from the vast amount of publications. Large language models (LLMs) have shown promise in analyzing article and reasoning about knowledge in some scientific fields, but their effectiveness in membrane research is unclear. Here, we introduced the first benchmark specifically designed for membrane studies and used it to systematically evaluate six general-purpose LLMs (i.e., Claude-3.5, Deepseek-R1, Gemini-2.0, GPT-4o-mini, Llama-3.2, and Mistral-small-3.1). Our findings revealed that the complexity and depth of NF knowledge pose a significant challenge for these LLMs, leading to poor performance, particularly in tasks involving membrane mechanisms. To enhance LLMs' using in this field, we developed a specialized NF database and integrated it with the LLMs using Retrieval-Augmented Generation (RAG). RAG significantly improved performance across all models, with average gains of 18.5 % on Question type tasks and 10.8 % on Reasoning type tasks. Moreover, in areas such as membrane fabrication and characterization, several models with RAG demonstrated performance exceeding that of human experts. These results suggested that RAG is a promising strategy for leveraging LLMs in NF research. This study introduced a new path for applying LLMs to membrane research and proposes a professional benchmark to ensure the reliable and effective use of LLMs.
{"title":"Evaluating and advancing large language models for nanofiltration membrane knowledge tasks","authors":"Xinchen Xiang , Zheng Cao , Yukun Qian , Dan Lu , Jiancong Lu , Jinyan Wang , Shiyu Zhou , Lijun Liang , Zhikan Yao , Lin Zhang","doi":"10.1016/j.advmem.2025.100161","DOIUrl":"10.1016/j.advmem.2025.100161","url":null,"abstract":"<div><div>Nanofiltration (NF) is a rapidly growing field, resulting in a surge of publications with diverse focuses. It's challenging for researchers to quickly find key information from the vast amount of publications. Large language models (LLMs) have shown promise in analyzing article and reasoning about knowledge in some scientific fields, but their effectiveness in membrane research is unclear. Here, we introduced the first benchmark specifically designed for membrane studies and used it to systematically evaluate six general-purpose LLMs (i.e., Claude-3.5, Deepseek-R1, Gemini-2.0, GPT-4o-mini, Llama-3.2, and Mistral-small-3.1). Our findings revealed that the complexity and depth of NF knowledge pose a significant challenge for these LLMs, leading to poor performance, particularly in tasks involving membrane mechanisms. To enhance LLMs' using in this field, we developed a specialized NF database and integrated it with the LLMs using Retrieval-Augmented Generation (RAG). RAG significantly improved performance across all models, with average gains of 18.5 % on Question type tasks and 10.8 % on Reasoning type tasks. Moreover, in areas such as membrane fabrication and characterization, several models with RAG demonstrated performance exceeding that of human experts. These results suggested that RAG is a promising strategy for leveraging LLMs in NF research. This study introduced a new path for applying LLMs to membrane research and proposes a professional benchmark to ensure the reliable and effective use of LLMs.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100161"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144588192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-01-01DOI: 10.1016/j.advmem.2025.100163
Yan Zhu, Danwei Huang, Hongbo Xie, Zheyuan Liu, Fei-Fei Chen, Yan Yu
Polyamide (PA) nanofiltration membranes have raised considerable interest in the realm of water purification. However, balancing permeability and rejection remains a critical challenge in membrane science and technology. Herein, we report that weak non-covalent hydrogen bonds and strong coordination bonds between ultrathin calcium silicate (UCS) interlayers and piperazine (PIP) powerfully control its diffusion. Theoretical calculations reveal that coordination bonds dominate PIP binding on UCS with an adsorption energy of −443.83 kJ mol−1, thereby impeding its movement. The diffusion coefficient of PIP diminishes by 14 % upon the incorporation of UCS, as evidenced by molecular dynamics simulations. As a consequence, a superhydrophilic, smooth, loose, and ultrathin (∼18.9 nm) PA separation layer is created. The as-obtained UCS-interlayered PA possesses a remarkable water permeance of 31.7 L m−2 h−1 bar−1 that is 2.2-fold higher than that of UCS-free PA, while dye rejection rates keep a high level. Furthermore, the UCS-interlayered PA demonstrates exceptional antifouling performance with a 95 % flux recovery ratio and long-term stability during 16-h filtration. The study highlights the pivotal role of mineral interlayers in tailoring amine monomer diffusion via multiple interfacial interactions for advanced water treatment applications.
{"title":"Ultrathin mineral interlayers regulate interfacial polymerization of polyamide nanofiltration membranes via multiple non-covalent and coordination bonding for rapid molecular separation","authors":"Yan Zhu, Danwei Huang, Hongbo Xie, Zheyuan Liu, Fei-Fei Chen, Yan Yu","doi":"10.1016/j.advmem.2025.100163","DOIUrl":"10.1016/j.advmem.2025.100163","url":null,"abstract":"<div><div>Polyamide (PA) nanofiltration membranes have raised considerable interest in the realm of water purification. However, balancing permeability and rejection remains a critical challenge in membrane science and technology. Herein, we report that weak non-covalent hydrogen bonds and strong coordination bonds between ultrathin calcium silicate (UCS) interlayers and piperazine (PIP) powerfully control its diffusion. Theoretical calculations reveal that coordination bonds dominate PIP binding on UCS with an adsorption energy of −443.83 kJ mol<sup>−1</sup>, thereby impeding its movement. The diffusion coefficient of PIP diminishes by 14 % upon the incorporation of UCS, as evidenced by molecular dynamics simulations. As a consequence, a superhydrophilic, smooth, loose, and ultrathin (∼18.9 nm) PA separation layer is created. The as-obtained UCS-interlayered PA possesses a remarkable water permeance of 31.7 L m<sup>−2</sup> h<sup>−1</sup> bar<sup>−1</sup> that is 2.2-fold higher than that of UCS-free PA, while dye rejection rates keep a high level. Furthermore, the UCS-interlayered PA demonstrates exceptional antifouling performance with a 95 % flux recovery ratio and long-term stability during 16-h filtration. The study highlights the pivotal role of mineral interlayers in tailoring amine monomer diffusion via multiple interfacial interactions for advanced water treatment applications.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"5 ","pages":"Article 100163"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144557142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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