Journal of Membrane Science最新文献

Methanol tolerable ultrathin proton exchange membrane fabricated via in-situ ionic self-crosslinking strategy for high-performance DMFCs 通过原位离子自交联策略为高性能 DMFC 制作耐甲醇的超薄质子交换膜

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2024-11-14 DOI: 10.1016/j.memsci.2024.123510

Yixin Luo , Jie Wang , Fuqiang Hu , Ting Qu , Hai Liu , Zushun Xu , Chunli Gong , Guoliang Liu , Ying Ou

{"title":"Methanol tolerable ultrathin proton exchange membrane fabricated via in-situ ionic self-crosslinking strategy for high-performance DMFCs","authors":"Yixin Luo , Jie Wang , Fuqiang Hu , Ting Qu , Hai Liu , Zushun Xu , Chunli Gong , Guoliang Liu , Ying Ou","doi":"10.1016/j.memsci.2024.123510","DOIUrl":"10.1016/j.memsci.2024.123510","url":null,"abstract":"<div><div>Proton exchange membranes (PEMs) with high proton conductivity, mechanical stability, and methanol barrier capability is urgently needed for direct methanol fuel cell (DMFCs). In response, a series of highly sulfonated polybenzimidazoles (SPBI) were synthesized, followed by the creation of a unique <em>in-situ</em> ionic self-crosslinking mechanism via acid-base pair interactions between –SO<sub>3</sub><sup>-</sup> and protonated N within the imidazolium rings of SPBI in an acidic milieu. The <em>in-situ</em> ionic self-crosslinking not only significantly enhances the mechanical stability of the prepared membrane, but also constructs a microstructure with a free volume radius smaller than the molecular dimensions of methanol, subsequently imparting unparalleled resistance to methanol permeation. After being reduced to an ultrathin thickness of 15 μm, the optimal SPBI-SO<sub>3</sub>H-200 % membrane obtains remarkable high specific proton conductivity of 33.48 S cm<sup>−2</sup>. Furthermore, the assembled DMFC demonstrates an exceptionally low methanol crossover current density of 188.25 mA/cm<sup>2</sup> alongside high power density of 109.92 mW cm<sup>−2</sup> within 2 M methanol fuel, significantly outperforming the methanol crossover current density of 386.06 mA/cm<sup>2</sup> and power density of 87.13 mW cm<sup>−2</sup> achieved by a single cell assembled with Nafion 115 membrane.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123510"},"PeriodicalIF":8.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stringing covalent organic framework particles for preparing highly loaded mixed-matrix membranes for efficient and precise dye separation 串联共价有机框架颗粒，制备高负载混合基质膜，实现高效精确的染料分离

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2024-11-14 DOI: 10.1016/j.memsci.2024.123509

Cai Zhang, Yinyu Li, Rongxin Huang, Xiaogeng Lin, Yang Huang, Yasan He

{"title":"Stringing covalent organic framework particles for preparing highly loaded mixed-matrix membranes for efficient and precise dye separation","authors":"Cai Zhang, Yinyu Li, Rongxin Huang, Xiaogeng Lin, Yang Huang, Yasan He","doi":"10.1016/j.memsci.2024.123509","DOIUrl":"10.1016/j.memsci.2024.123509","url":null,"abstract":"<div><div>Covalent organic frameworks (COFs) based mixed-matrix membranes (MMMs) combining the merits of processable polymers and ordered porosity are potential for molecular separation. However, it remains a challenge to control the interfacial compatibility to prepare high COFs loaded MMMs. Herein, we developed a facile strategy of “Stringing COF particles” for improving the interfacial compatibility to prepare high COFs loaded MMMs with high separation performance. The MMMs could be prepared by simply mixing COF powders with chitosan (CS) solutions, without needing the complicated nanosheetization or modification of COFs. Three typical COFs were synthesized and tested. The suitable large pore size and good hydrophilicity of COFs were confirmed crucial to the “Stringing” strategy. Characterizations indicated CS could enter the larger pores of the COFs (named COF-TADH) and firmly string COF particles together via strong H-bonding to obtain a tightly assembled COF-TADH@CS layer with COFs loading up to 67 wt%. The fabricated 67%COF-TADH@CS/nylon membrane exhibited excellent permeance and stable 100 % rejection to Coomassie brilliant blue (BB), highly competitive compared with other reported membranes. The high COFs loaded MMMs maintain the sieving merits of ordered COF pores, achieving precise separation of the mixed BB/Methyl orange (MO) solution with only MO penetrating through.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123509"},"PeriodicalIF":8.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High rejection seawater reverse osmosis TFC membranes with a polyamide-polysulfonamide interpenetrated functional layer 具有聚酰胺-聚磺酰胺互穿功能层的高排斥海水反渗透 TFC 膜

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2024-11-14 DOI: 10.1016/j.memsci.2024.123507

Qihang Li , Liyi An , Chuning Shang , Jianqiang Meng

{"title":"High rejection seawater reverse osmosis TFC membranes with a polyamide-polysulfonamide interpenetrated functional layer","authors":"Qihang Li , Liyi An , Chuning Shang , Jianqiang Meng","doi":"10.1016/j.memsci.2024.123507","DOIUrl":"10.1016/j.memsci.2024.123507","url":null,"abstract":"<div><div>Current polyamide thin-film composite (TFC) membranes for seawater reverse osmosis (SWRO) require enhanced rejection capabilities for high salinity application and the removal of neutral micropollutants. In this study, we developed high rejection SWRO membranes utilizing <em>m</em>-phenylenediamine (MPD) as the water phase monomer, trimethyl chloride (TMC) as the organic phase monomer, and naphthalene-1,3,6-trisulfonyl chloride (NTSC) as a molecular plug. Xylene was added to the heated organic phase to compensate for the flux loss due to the tightened functional layer. The membranes were characterized in detail with ATR-FTIR, XPS, SEM, AFM, WCA, surface zeta potential, Positron annihilation spectroscopy (PALS), and quartz crystal microbalance (QCM). Our results indicate that adding xylene into the organic phase enhances flux, while heating the organic phase to 90<sup>o</sup>C benefits both flux and rejection. Furthermore, the addition of NTSC further improves the rejection. The variation in membrane flux correlates with the functional layer morphology under SEM and the membrane rejection properties correspond well with the functional layer free volume results by PALS. Due to the low reactivity of sulfonyl chloride, NTSC can only form oligomers embedding into the polyamide network, resulting in significantly higher rejection of sodium chloride (99.90 %) and boron (92.39 %) with a flux of 37.85 L m<sup>−2</sup> h<sup>−1</sup> under the conditions of 35000 ppm NaCl and 5 ppm boric acid at 800 psi. This work demonstrates that high rejection SWRO membranes can be successfully achieved by an in situ “swelling and filling” method.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123507"},"PeriodicalIF":8.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lattice-defective metal-organic framework membranes from filling mesoporous colloidal networks for monovalent ion separation 用于单价离子分离的填充介孔胶体网络晶格缺陷金属有机框架膜

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2024-11-14 DOI: 10.1016/j.memsci.2024.123508

Yihao Xiao, Yanqing Yu, Xinxi Huang, Kun Niu, Wanbin Li

{"title":"Lattice-defective metal-organic framework membranes from filling mesoporous colloidal networks for monovalent ion separation","authors":"Yihao Xiao, Yanqing Yu, Xinxi Huang, Kun Niu, Wanbin Li","doi":"10.1016/j.memsci.2024.123508","DOIUrl":"10.1016/j.memsci.2024.123508","url":null,"abstract":"<div><div>Ionic separations are critical to various chemical, environmental, and energy-related industries, but precise discrimination of monovalent ions with similar properties is extremely difficult. Nanoporous metal-organic framework (MOF) membranes attract intensive attention for ionic separations. However, precise adjusting transport nanochannels of frameworks and simplifying formation mechanisms of membranes remain extremely challenging. In this study, we report controllable construction of lattice-defective MOF membranes for sharp ion sieving, through filling mesoporous MOF colloidal layers by confined interior growth. By utilizing highly processable mesoporous colloidal networks to provide abundant nucleation sites, decelerate precursor diffusions, and serve as membrane-forming hosts, interior MOF growth can be confined in the mesopores of hosts, thereby eliminating any avoid spaces and constructing pinhole-free membranes in a scalable route. Moreover, through creating linker-missing lattice defects in frameworks, the microporous pathways can be accurately expanded at angstrom level, consequently, selectively improving the accessibilities for specific monovalent cations but maintaining the large resistances for others. Importantly, the prepared 150-nm MOF membranes exhibit good long-term stability and superb ion-sieving performance, especially for monovalent cations, with mixture selectivities as high as 7.5 for K<sup>+</sup>/Li<sup>+</sup> and 51 for K<sup>+</sup>/Mg<sup>2+</sup> during concentration-driven separations, which outperform most membranes. This study provides an alternative methodology to construct high-performance ion-sieving polycrystalline membranes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123508"},"PeriodicalIF":8.4,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ultrathin cyclodextrin-based nanofiltration membrane with tunable microporosity for antibiotic desalination 用于抗生素脱盐的具有可调微孔的超薄环糊精基纳滤膜

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2024-11-13 DOI: 10.1016/j.memsci.2024.123504

Linlong Zhou , Shuyun Gu , Fang Xu , Jin Zhang , Zheyi Hu , Siyao Li , Zhi Xu

{"title":"Ultrathin cyclodextrin-based nanofiltration membrane with tunable microporosity for antibiotic desalination","authors":"Linlong Zhou , Shuyun Gu , Fang Xu , Jin Zhang , Zheyi Hu , Siyao Li , Zhi Xu","doi":"10.1016/j.memsci.2024.123504","DOIUrl":"10.1016/j.memsci.2024.123504","url":null,"abstract":"<div><div>Nanofiltration (NF) membranes play a crucial role in ion separation and antibiotic purification due to their energy efficiency and environment-friendliness. However, conventional polymeric membranes are susceptible to the “trade-off” between permeability and selectivity due to the lack of intrinsically rigid micropores. Herein, the amino-cyclodextrins (amino-CDs) with different cavity sizes were synthesized and employed as the building block to construct 15-nm-thick nanofilms. The rational incorporation of macrocycles with well-defined and tunable cavity into nanofilm enabled a significant enhancement of water permeance and a precise manipulation of molecular weight cut-off of the membranes. Thanks to the significant difference of inherent energy barrier for passage of ions through CD cavity, the CD-incorporated membranes achieved a high Cl<sup>−</sup>/SO<sub>4</sub><sup>2−</sup> selectivity of 87. In addition, the CD-regulated membranes showed an excellent antibiotic desalination performance, out-performing the state-of-the-art membranes for antibiotic purification. This work provides a gateway to the development of nanofiltration membranes with precise molecular sieving for antibiotic desalination.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123504"},"PeriodicalIF":8.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-metallic cation and anion co-doped perovskite oxide ceramic membranes for high-efficiency oxygen permeation at low temperatures 用于低温下高效氧气渗透的非金属阳离子和阴离子共掺杂过氧化物陶瓷膜

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2024-11-13 DOI: 10.1016/j.memsci.2024.123500

Song Lei , Sisi Wen , Jian Xue , Ao Wang , Jiaqi Li , Zhongyuan Liu , Longgui Zhang , Yifeng Li , Haihui Wang

{"title":"Non-metallic cation and anion co-doped perovskite oxide ceramic membranes for high-efficiency oxygen permeation at low temperatures","authors":"Song Lei , Sisi Wen , Jian Xue , Ao Wang , Jiaqi Li , Zhongyuan Liu , Longgui Zhang , Yifeng Li , Haihui Wang","doi":"10.1016/j.memsci.2024.123500","DOIUrl":"10.1016/j.memsci.2024.123500","url":null,"abstract":"<div><div>Insufficient structural stability and limited lattice oxygen mobility at low temperatures seriously limit the application of perovskite-type oxides in mixed ionic-electronic conducting oxygen-permeable membranes. Engineering the crystal structure and oxygen vacancies by ion doping is an effective strategy to enhance both structural stability and lattice oxygen mobility. Different from conventional metal ion doping, we report that the co-doping of the classical SrCoO<sub>3-<em>δ</em></sub> by the non-metallic cation P<sup>5+</sup> and the anion Cl<sup>−</sup> stabilizes the cubic perovskite structure and allows low temperature oxygen permeation due to improved lattice oxygen mobility. In detail, P doped at the Co site transforms the crystal structure from the hexagonal phase to the cubic phase, and Cl doped at the oxygen site weakens the metal-oxygen bond, which significantly enhances the lattice oxygen mobility. Optimal doping concentrations were found to be SrCo<sub>0</sub><sub>.</sub><sub>95</sub>P<sub>0</sub><sub>.</sub><sub>05</sub>O<sub>3-<em>δ</em></sub>Cl<sub>0.05</sub> (SCP5Cl5). Furthermore, by constructing an asymmetric membrane with a sandwich structure, the oxygen permeation flux of the SCP5Cl5 ceramic membrane was up to 1.10 mL min<sup>−1</sup> cm<sup>−2</sup> at 873 K, which provides an effective strategy for developing oxygen-permeable membranes with high permeation flux at low temperatures.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123500"},"PeriodicalIF":8.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

New insight into pore characteristics for cake layers formed on nanocomposite membranes: Effect of membrane surface fractality 对纳米复合膜上形成的滤饼层孔隙特征的新认识：膜表面断裂的影响

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2024-11-13 DOI: 10.1016/j.memsci.2024.123498

Juan Tang , Mengqi Zhang , Kang Liu , Fang Zhang , Haiou Huang

{"title":"New insight into pore characteristics for cake layers formed on nanocomposite membranes: Effect of membrane surface fractality","authors":"Juan Tang , Mengqi Zhang , Kang Liu , Fang Zhang , Haiou Huang","doi":"10.1016/j.memsci.2024.123498","DOIUrl":"10.1016/j.memsci.2024.123498","url":null,"abstract":"<div><div>Over the past two decades, there has been extensive research that attempts to relate membrane's performance to its surface roughness. However, applicability of this approach to nanocomposite membranes is questionable, given the highly diverse membrane structures. In this study, three types of carbon nanotube composite membranes (CNT_S, CNT_M, and CNT_L) were prepared and used to filter fluorescent polystyrene particles under favorable surface interaction conditions. The resulting cake structures were imaged using laser confocal microscopy and analyzed for pore characteristics. It was found that cake layers with lower porosity and smaller average pore size also had more tortuous and complex pore channels, leading to lower water permeability. Moreover, simulations of the cake layers with a pore network model reveal that pore radius and throat length are key factors affecting water permeability. Further application of the machine learning (ML) model accurately predicts cake permeability based on the 3D fractal dimension (2.44–2.81), anisotropy (0.64–0.81) and porosity (0.3–0.71) of the pore space and R<sup>2</sup> of the test set reaches 0.96. Finally, the Weierstrass-Mandelbrot equation is applied to describe the self-similar fractal surfaces possessed by the CNT membranes. The respective fractal dimensions of three membrane surfaces (<em>D</em><sub><em>f</em></sub>) are 2.31, 2.11 and 2.57. At a <em>D</em><sub><em>f</em></sub> value of 2.31, the cake layer exhibits greater pore homogeneity and connectivity, and thus higher water permeability. Overall, this study revealed the fractal nature of CNT membrane surface and its relevance to pore structure and water permeability of the cake layers.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123498"},"PeriodicalIF":8.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Achieving antibiofouling on microporous membranes prepared with a green solvent via spraying an aqueous antifouling copolymer solution 通过喷洒防污共聚物水溶液实现用绿色溶剂制备的微孔膜的防污效果

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2024-11-12 DOI: 10.1016/j.memsci.2024.123499

Trisha Nicole Lazo , Irish Valerie Maggay , Lemmuel Tayo , Yung Chang , Antoine Venault

{"title":"Achieving antibiofouling on microporous membranes prepared with a green solvent via spraying an aqueous antifouling copolymer solution","authors":"Trisha Nicole Lazo , Irish Valerie Maggay , Lemmuel Tayo , Yung Chang , Antoine Venault","doi":"10.1016/j.memsci.2024.123499","DOIUrl":"10.1016/j.memsci.2024.123499","url":null,"abstract":"<div><div>This study highlights a comprehensive investigation into the fabrication and characterization of sustainable membranes for antifouling applications. It utilizes γ-valerolactone as a green solvent to obtain microfiltration polyvinylidene difluoride (PVDF) membranes, and leverages spray-coating technique to modify these membranes. This research aims to enhance the surface and bulk properties of PVDF membranes while promoting sustainable practices. Chemical analyses of the membranes reveal that the surface and bulk of the membranes were successfully modified. Dynamic water contact angle measurements indicated that a 10 mg/mL coating solution (PVDF_10) resulted in the highest hydrophilicity. Different biofouling tests were conducted using proteins and bacteria. In adhesion tests with BSA, and <em>E. coli</em>, the PVDF_10 membrane demonstrated the highest resistance, reducing adhesion by approximately 83 % and 94 %, respectively. Additionally, cyclical water/bacterial filtration tests demonstrated that PVDF_10 membrane achieved a higher flux recovery ratio compared to commercial hydrophilic PVDF membranes. The modification remained stable even after 6 weeks of immersion in water. This study highlights the potential of γ-GVL and the spray-coating technique as environmentally friendly solvents and modification techniques for producing green antifouling PVDF membranes, aligning with sustainable practices and significantly enhancing membrane performance.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123499"},"PeriodicalIF":8.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Overall mass transfer approach for electrodialysis-based acid recovery 基于电渗析的酸回收的整体传质方法

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2024-11-12 DOI: 10.1016/j.memsci.2024.123495

Xiao-guang Xu , Yu-xiang Jia , Meng Wang

{"title":"Overall mass transfer approach for electrodialysis-based acid recovery","authors":"Xiao-guang Xu , Yu-xiang Jia , Meng Wang","doi":"10.1016/j.memsci.2024.123495","DOIUrl":"10.1016/j.memsci.2024.123495","url":null,"abstract":"<div><div>The reclamation of low-concentration waste acid (e.g., pH > 0.5) has garnered significant attention due to its prevalence, substantial output, and considerable potential value. Notably, a further concentration of the separated acid is typically required for practical applications, for which electrodialysis (ED) has been widely acknowledged as an effective method. However, various factors, including proton leakage, complicate the application of ED in acid systems compared to salt systems. This study presents a novel modeling approach for ED-based acid recovery utilizing the overall mass transfer (OMT) methodology for the first time. Importantly, regression models incorporating initial concentration and current density as independent variables have been developed to calculate the OMT coefficients and cell resistance following a quantitative analysis of the effects of acid media and electric field on mass transport phenomena, based on a series of carefully designed experiments. Subsequent predictions regarding a typical ED-based acid recovery process were conducted, yielding results that align closely with experimental data. For instance, the relative deviations for concentration and volume evolution were found to be less than ±8.4 % and ±7.9 %, respectively. Additionally, the relative deviations for energy consumption were recorded at 8.2 % and 3.2 % for the overall process and the ED stack, respectively. Furthermore, simulations were performed to evaluate the impacts of operational conditions on ED performance using the derived models. In conclusion, the efficacy of the OMT approach for modeling the ED process in acid systems has been substantiated. It is reasonable to assert that the developed models will be beneficial for production management and the optimization of operating conditions in ED-based acid recovery processes.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123495"},"PeriodicalIF":8.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly efficient porous MXene desalination membranes controlled by the thickness of the transition metal carbides 由过渡金属碳化物厚度控制的高效多孔 MXene 海水淡化膜

IF 8.4 1区工程技术

Journal of Membrane Science Pub Date : 2024-11-10 DOI: 10.1016/j.memsci.2024.123468

Ting Si , Xinyao Ma , Zhenyu Liao , Huan Chen , Bochun Liang , Sai Tak Chu , Jun Fan

{"title":"Highly efficient porous MXene desalination membranes controlled by the thickness of the transition metal carbides","authors":"Ting Si , Xinyao Ma , Zhenyu Liao , Huan Chen , Bochun Liang , Sai Tak Chu , Jun Fan","doi":"10.1016/j.memsci.2024.123468","DOIUrl":"10.1016/j.memsci.2024.123468","url":null,"abstract":"<div><div>MXene membrane has the vast potential to alleviate the global freshwater crisis. Herein, a new strategy for improving the desalination performance is proposed through tunable the thickness transition metal carbides of the nano-porous MXene membrane. The thickness of porous MXene is investigated by molecular dynamics (MD) simulation, including the Ti<sub>2</sub>CF<sub>2</sub>, Ti<sub>3</sub>C<sub>2</sub>F<sub>2</sub>, and Ti<sub>4</sub>C<sub>3</sub>F<sub>2</sub>. The results show that the porous MXene membrane can reach highly efficient desalination. The water density distribution reveals that more water gathers in the thicker transition metal carbides layer, contributing to the poor water flux; the average charge distribution indicates that the transition metal layer plays an essential role in effectively rejecting Na<sup>+</sup>/trapping Cl<sup>−</sup> ions. Multilayered porous membranes are explored to improve the trade-off desalination performance. The number of pores enhances the water permeability, and the multilayers improve the ion rejection. The two-layered Ti<sub>3</sub>C<sub>2</sub>F<sub>2</sub> membrane with three nanopores achieves nearly doubled water flux and keeps 100 % ion rejection. Our work reported that the nano-porous MXene membrane offers a prospective strategy to eliminate the current design defects, which provides an innovative method for the desalination semipermeable membrane industry.</div></div>","PeriodicalId":368,"journal":{"name":"Journal of Membrane Science","volume":"715 ","pages":"Article 123468"},"PeriodicalIF":8.4,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142660140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0