JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Li-Hao Xu,Yan Li,Shen-Hui Li,Ming-Yu Lv,Zhi-Ping Zhao
Expanding the metal–organic frameworks (MOFs) category using room-temperature colloidal chemistry route with regular crystal structure is challenging, but important for reducing energy consumption and realizing an economically viable application in industry. Herein, we developed a novel advanced copper terephthalate MOF (CuBDC) between graphene oxide (GO) layers using a simple space-confined growth strategy at room temperature. The inclusion of CuBDC@GO can realize high filler loadings while maintaining uniform dispersion throughout PDMS matrix. The paralled arranged CuBDC sheets created 1D inner vertical channels, along with the enlarged GO interlayer space for rapid molecule permeselective transport. The resultant mixed matrix membranes (MMMs) with 30 wt% CuBDC@GO loading improved the separation factor from 190.6 to 576.3, and simultaneously increased the total flux from 575.2 to 1357.4 g m -2 h -1 for separating 0.5 wt% butyl acetate at 40 °C. The transport mechanism was explained by adjusting the CuBDC content in composites to examine the significant increase in membrane permeability (from 12.5 to 58.3) and selectivity (from 0.7 to 2.0). Compared to alcohol or ketone, the larger size strip-like butyl acetate molecules are ideal for rapid transport through the CuBDC-supported 1D continuous inner channels, and effectively inhibit the movement of water molecules, ultimately resulting in the largest pervaporation performance improvement in butyl acetate/water separation. This CuBDC@GO prepared by a simple, green and room-temperature synthesis route can be widely applied to prepare defect-free membranes with excellent performance for sustainable applications. We also anticipate that this advanced space-confined growth strategy can be extended to various other MOFs and applications.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Yanqing Xu,Guibin Peng,Junbin Liao,Jiangnan Shen,Congjie Gao
The state-of-the-art graphene oxide (GO) has been wildly used in water purification due to its tunable nanoscale interlayer between the two-dimensional nanosheets . However, the structural instability and flux decline performances significantly limit the practical application of GO-based membranes. Herein, a novel GO/DTiO 2 -PDA-PEI (dopamine modified TiO 2 ) composite nanofiltration membrane has been prepared via a multi-coupled strategy, combining with the self-assembly, copolymerization and surface grafting. Tuning the nanoscale interspace between the GO nanosheets , and constructing the membrane with positively charged surface and negatively charged subsurface, the loose GO/DTiO 2 -PDA-PEI composite nanofiltration membrane (GDP 1 P 2 -0.6 membrane with a mean pore size = 0.87 nm) show the filtration performance with water permeance as high as 41.6 L m −2 h −1 bar −1 and dye rejection around 99.9%, and the molecular selective factor (Eriochrome black T/Na 2 SO 4 ) of α = 47.6. Long-term performance and stimulation have been investigated to further analyze the dye concentration and salt removing. The investigations demonstrate that the GO/DTiO 2 -PDA-PEI composite nanofiltration membrane enriches 14.9-fold Eriochrome black T (ET) and reduces Na 2 SO 4 to 0.36% in the term of the concentration factor 15 and batch diafiltration factor 5.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zifan Song,Ran Chen,Shan Luo,Wangyang Yu,Jinqiu Yuan,Fengcai Lin,Meijie Wang,Xingzhong Cao,Yiqiang Liao,Biao Huang,Xinda You
Organic solvent nanofiltration (OSN) is a low-carbon technology for organic mixture separation that usually relies on non-renewable fossil-derived membranes. Cellulose, a biomass material with extensive sources and superior resistance to organic solvents, holds great promise in engineering OSN membranes. Here we studied the mass transport and separation properties of regenerated cellulose membranes (RCMs), which were made from wood pulp using ionic liquid as solvent by phase inversion method. By regulating membrane thickness from 150 μm to 350 μm, the solvent permeance and solute rejection can be finely tuned. The 350-μm-thick RCM membrane (RCM-350) displays better compaction resistance than the thinner ones and harvests high solute rejection with ethanol permeance reaching ∼ 30 L m −2 h −1 bar −1 , outperforming the state-of-the-art polymeric membranes and showing long-term stability during cross-flow OSN. When used for solute separation, the RCM-350 membrane provides molecular selectivity of up to 294 and 68 for Alcian blue/Rifampicin and Alcian blue/Tetracycline mixtures, respectively, which depends on the mixture composition. Our findings reveal the potential of regenerated natural cellulose as a high-performance and sustainable alternative membrane material for separating organic mixtures.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Zihao Liu,Yingjie Huang,Yanfeng Lv,Yushun Zhou,Kang Wang,Hui Zhao
The successful realization of thin film composite (TFC) organic solvent nanofiltration (OSN) membranes with high permeability and small solute selectivity for solute–solute separation to purify drugs in complex solution environments remains challenging in the pharmaceutical industry. Here, we present the preparation of high cross-linked TFC OSN membranes via interfacial polymerization (IP) utilizing phlorotannin, a plant-derived biomass phenolic compound, as a promising aqueous phase monomer. Benefiting from the presence of multiple cross-linking sites and twisted rigid structure in phlorotannin, nanofiltration membranes with excellent molecular selectivity and solvent permeability were successfully fabricated. This allowed for straightforward separation and purification of active pharmaceutical ingredients from intermediates. The membranes demonstrated remarkable stability over extended periods of operation and adaptability to a diverse array of solvent environments, making them a highly promising option for use in fine chemicals, biopharmaceuticals, and other fields.
研究领域:
材料科学
·
制药工程
·
生物化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mengling Xie,Shumei Xia,Jiaoyu Peng,Keli Yang,Xiuyu Zhang,Xin Liu
Conventional membrane separation technology still encounters substantial challenges in removal of various dissolved organic matter in concentrated-saline brine due to their imperfect interlayer microstructure and inferior stability. Here, we demonstrate an ingenious design to build stable and defect-free interlayer structure inside the sodium alginate (SA)-crosslinked graphene oxide (GO) composite membranes by anchoring bimetallic ions as bridging center at different binding sites. SA can realize the ordered self-assembly of GO nanosheets through Van der Waals forces and hydrogen bonding, and provide more metal ion coordination sites. On this basis, Sr 2+ preferentially bridges with the G-blocks of SA and the carboxylate groups on GO, while Fe 3+ is precisely anchored in the residual G- and M−blocks on SA, the oxygen-containing groups and graphitic regions on GO nanosheets via strong coordination interaction. The synergistic coordination constructs additional water transport nanochannels, while also imparting the membrane with stable and regular interlayer structure, thereby improving permeability without sacrificing separation performance. This design endows the membrane with super-hydrophilicity, great tolerance toward high salts concentrations (372.4 g‧L −1 ), strong acid-alkali resistance, excellent long-term structural stability and cycling performances. Notably, the composite membrane exhibits high rejection for various dissolved organic matter and diverse dyes, while maintaining a superhigh permeance (21130 L·m −2 ·h −1 ·bar −1 ), which is greatly superior to traditional membranes. Size sieving and electrostatic interaction provide the main support for molecule selective separation. This protocol highlights the practical application prospect of GO-based membrane in the field of high-salinity brine treatment.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yehao Jin,Aiwen Zhang,Guanying Dong,Jingwei Hou,Junyong Zhu,Yatao Zhang
Microporous organic polymers (MOPs) featuring chemically rigid backbones and permanent micropores are desirable for fabricating molecular selective membranes towards organics separation. However, coordinating facile film processing with high micropore persistence remains a challenge. In this paper, a low molecular weight polymers of intrinsic microporosity was rationally designed by precisely controlling the stoichiometric equilibrium of polymerization monomer. The polymers of intrinsic microporosity oligomers combine rigid and contorted structures with the aqueous solution processability, promoting the formation of 25-nm-thick polyaramide nanofilms with enhanced microporosity via support-free interfacial polymerization (SFIP). The resulting composite membranes have superior retention of small molecular solutes and high nonpolar and polar solvent permeances. Experiment and simulation results show that their excellent separation performance is due to substantially open and interconnected microporosity formed in the polymer networks based on rigid and contorted diamines as well as reduced film thickness. This study provides a new sight for using MOPs to construct high-microporosity membranes for precise and rapid molecular sieving.
研究领域:
材料科学
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分离技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Tianci Feng,Xiansong Shi,Tong Ju,Jianghai Long,Qinghua Liu,Ming Liu,Yong Wang
Covalent organic frameworks (COFs), with their regularly organized structures and solvent resistance, offer distinct advantages for constructing liquid-phase separation membranes. In nearly a decade of development, research has mainly focused on two-dimensional (2D) COFs, which yet give insufficient molecular selectivity due to inherent large pores. Here, we present a mixed-dimensional strategy of growing three-dimensional (3D) COFs on 2D COFs to build bilayered membranes for efficient organic solvent nanofiltration (OSN). The pores of 3D COFs interlace with those of 2D counterparts, resulting in a subnanoporous composite. We develop this 3D-/2D-COFs composite as robust membranes with a nanoscale thickness. The optimal bilayered membrane yields ethanol permeance of 12.2 L m −2 h −1 bar −1 with a molecular weight cutoff as low as ∼400 g mol −1 , surpassing conventional COF-based OSN membranes. Importantly, the designed 3D-/2D-COFs membrane exhibits stable separation performance and excellent sieving ability to discriminate molecular mixtures. This exceptional molecular selectivity ultimately allows the separation of bioactive pharmaceuticals from impurities through our membrane. Overall, this work provides a design strategy for producing mixed-dimensional COF membranes to advance molecular separation in liquids.
研究领域:
材料科学
·
化学工程
·
药学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Shijie Sun,Baijin Li,Wei Xiong,Boyu Fu,Yong Zhang,Zilin Ruan,Lei Gao,Xiaoqing Zuo,Jianchen Lu,Jinming Cai
Supramolecular self-assembly offers a feasible route for nanopatterning and functionality. The construction and precise control of selective adsorption at the molecular scale play essential roles in fundamental sciences and practical applications. Molecular tiling such as trihexagonal tiling Kagome networks has potential promising chemical and physical properties. Distorted Kagome-like networks controllable fabrication is possible by coupling molecular functional groups and substrate atoms. A chiral Kagome-like network was constructed using IFDO ([1,2-b]fluorene-6,12-dione) as precursor molecules complemented with molecular beam epitaxy and annealing strategies. Revealing arrangements of the assembled network of O-Cu metal coordination linked Kagome-like networks on the Cu(1 1 1) surface and their assembly mechanisms and cavity characteristics were explored in detail through scanning tunneling microscopy combined with density functional theory. Based on the electronic state difference between the hole center of the network and the molecular backbone, the host–guest network was successfully prepared by co-depositing C 60 molecules. Kagome-like networks could as an efficient template for regulating the adsorption configuration of C 60 . Our results demonstrate a controllable and efficient method to design atomically precise ordered host–guest assemblies on solid surfaces, advancing the approach is yet another step toward the fabrication of molecular devices.
研究领域:
表面科学
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纳米材料学
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超分子化学
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凝聚态物理
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分子自组装
·
扫描探针显微学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Xiansong Shi,Xingyuan Wang,Tianci Feng,Tong Ju,Jianghai Long,Congcong Yin,Zhe Zhang,Yong Wang
Permanently microporous materials have evolved as focal point of research for tackling issues in separation science and membrane technology. Covalent organic frameworks (COFs) stand out for their distinctive synergy of crystalline nature, uniform channels, and structural diversities. Three-dimensional (3D) COFs, distinguished by angstrom-sized and interconnected channels, hold special promise for separating small targets; however, this potential remains underexplored. Here, we report feasible growth of cationic 3D COF membranes on a flexible polymer substrate for versatile nanofiltration toward both molecules and ions. Through comprehensive performance evaluations, we reveal that the resultant membrane exhibits durable and prominent molecular selectivity to separate fine species with molecular weights above 300 g mol -1 at fast methanol permeation. Lanthanide ions of industrial value also can be harvested by the membrane with rejection rates of up to 91.4%. Together with its nonselectivity to competing ions, our membrane implements efficient extraction of rare earth elements from ion mixtures. These findings illuminate the potential of 3D COFs for liquid separation and offer a solution to building versatile membranes.
研究领域:
材料科学
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化学工程
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Science Advances
·
2024
·Vol. 10
·期 32
·
IF 11.7
Ayan Yao,Junjun Hou,Pengjia Dou,Jingcheng Du,Qian Sun,Ziye Song,Linghao Liu,Jian Guan,Jiangtao Liu
Thin-film composite (TFC) membranes have gradually replaced some traditional technologies in the extraction, separation, and concentration of high value-added pharmaceutical ingredients due to their controllable microstructure. Nevertheless, devising solvent-stable, scalable TFC membranes with high permeance and efficient molecule selectivity is urgently needed to improve the separation efficiency in the separation process. Here, we propose phenolphthalein, a commercial acid-base indicator, as an economical monomer for optimizing the micropore structure of selective layers with thickness down to 30 nanometers formed by in situ interfacial reactions. Molecular dynamics simulations indicate that the polyarylate membranes prepared using three-dimensional phenolphthalein monomers exhibit tunable microporosity and higher pore interconnectivity. Moreover, the TFC membranes show a high methanol permeance (9.9 ± 0.1 liters per square meter per hour per bar) and small molecular weight cutoff (≈289 daltons) for organic micropollutants in organic solvent systems. The polyarylate membranes exhibit higher mechanical strength (2.4 versus 0.8 gigapascals) compared to the traditional polyamide membrane.
研究领域:
材料科学
·
化学工程
·
膜技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2014
·
IF 3.511
Chunbo Liu,Zhilong Song,Jianming Pan,Yongsheng Yan,Zhijing Cao,Xiao Wei,Lin Gao,Juan Wang,Jiangdong Dai,Minjia Meng,Ping Yu
In this study, surface molecularly imprinted YVO 4 :Eu 3+ nanoparticles with molecular recognitive optosensing activity were successfully prepared by precipitation polymerization using λ-Cyhalothrin (LC) as template molecules, methacrylic acid and ethylene glycol dimethacrylate as the polymerization precursors which could complex with template molecules, and the material has been characterized by SEM, TEM , FT-IR, XRD, TGA and so on. Meanwhile, the as-prepared core–shell structured nanocomposite (YVO 4 :Eu 3+ @MIPs), which was composed of lanthanide doped YVO 4 :Eu 3+ as fluorescent signal and surface molecular imprinted polymers as molecular selective recognition sites, could selectively and sensitively optosense the template molecules. After the experimental conditions were optimized, two linear relationship were obtained covering the concentration range of 2.0−10.0 μM and 10.0−90.0 μM, and the limit of detection (LOD) for LC was found to be 1.76 μM. Furthermore, a possible mechanism was put forward to explain the fluorescence quenching of YVO 4 :Eu 3+ @MIPs. More importantly, the obtained sensor was proven to be suitable for the detection of residues of LC in real examples. And the excellent performance of this sensor will facilitate future development of rapid and high-efficiency detection of LC.
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）