ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Hanzhong Xiao,Baicun Hao,Xinman Li,Wan Zheng,Yujia Wang,Yang Shi,Xin Huang
Spreading is a critical step for emulsion separation. However, the spreading of emulsions on porous size-sieving materials is constrained by their small size-sieving pores formed on rough surface that frequently evolved into lyophobic air-solid-liquid interface to repel emulsions, resulting in poor separation flux. Herein, we demonstrated for the first time that endowing size-sieving materials with amphiphilicity was a promising and universal alternative to manipulate the spreading kinetics of emulsions for accomplishing high-flux separation. A variety of porous materials with varied chemical composition and high porosity, including metal-organic frameworks (ZIF-67, ZIF-8 and HKUST-1), activated carbon and γ-Al2O3, were endowed with amphiphilicity by polyphenolic chemistry-derived noncovalent amphiphilic decoration of polyphenols-iron ions complexes. The endowed amphiphilicity prevented the formation of lyophobic interface on the rough surface of the porous materials, which boosted the emulsion spreading kinetics by up to 11.8-fold, and a significant enhancement (492.3%) on separation flux was achieved by the amphiphilic size-sieving strategy. Our findings exploited a novel strategy for the big family of size-sieving materials to accomplish high-flux separation performances.
研究领域:
材料科学
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界面化学
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分离工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2022
·
IF 3.656
Peng Yan,Xiang Li,Deyun Ma,Lijun Li,Yuwen Lan,Zhiyong Li,Xiaoting Lu,Manqi Yang,Fenglan Liang
An ultramicropore MOF , {[Co 6 (5-MIA) 5 (tmbpy)(μ 3 -OH) 2 (ethanol) 2 ]∙(ethanol) 2 } n ( 2 ) (5-H 2 MIA= 5- methoxyl-isophthalic acid; tmbpy = 3,3′-dimethyl-4,4′-bipyridine), was rationally designed and constructed. The gas sorption behavior of 2 for C 2 H 2 , CO 2 , CH 4 , CO, and N 2 was investigate by experiments. The C 2 H 2 and CO 2 uptakes of the activated sample ( 2a ) were up to 64.87 cm 3 g −1 and 63.97 cm 3 g −1 at 273 K (100 kPa), respectively. Specifically, 2a possesses 3.5 Å of aperture and multi-functional sites (open Co 2+ sites and methoxy groups), resulting in the synergistic effect of size sieving and host-guest interactions for selective adsorption of carbon dioxide (or acetylene). The IAST selectivities of C 2 H 2 /CH 4 (1:1) and CO 2 /CH 4 (1:1) on 2a were 26.6 and 12.3 at ambient temperature and 100 kPa, respectively. The easy regeneration, outstanding humid/thermal stability, and good reusability, make it a promising candidate for industrial application of the separation of C 2 H 2 /CH 4 , CO 2 /CH 4 , CO 2 /N 2 and CO 2 /CO.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Enze Li,Zelong Li,Hongli Zhu,Qiancheng Xia,Zihe Pan,Zhaozan Xu,Guandao Gao,Guoqing Guan,Fangqin Cheng
The sustainable and efficient lithium supply is one of the prerequisites and important supports for the transformation of global energy towards electrification and decarbonization. However, current established membrane materials for lithium recovery from salt-lake brine with high Mg/Li ratio still suffer from complex preparation process, poor stability and low selectivity. Herein, we develop a stable graphene oxide (GO)-based membrane with controllable interlayer spacing at angstrom level and positive charged surface through a facile method for highly efficient lithium separation. Specially, the interlayer spacing is precisely adjusted using dicarboxylic acids with different chain lengths through esterification reaction with GO sheets, and the poly(allylamine) (PAA) is coated on it to construct the positive charged surface. Experiments with DFT calculations demonstrate that the geometrical configuration of GO-dicarboxylic acid and the interlayer spacing with glutaric acid (GA) is most suitable for Li + separation. The synergy between crosslink of dicarboxylic acid and permeation of PAA enhances the stability of membrane. The obtained GO-GA-PAA membrane exhibits excellent Li + sieving performance with Li + /Mg 2+ selectivity up to 34.41 under the optimal operation condition, and outstanding cycling stability. The characterizations including solid zeta potential and atomic force microscope (AFM) indicate that the presence of positive charges on the surface can remarkably improve the Li + /Mg 2+ selectivity. The surface positive charge exerts stronger electrostatic repulsive towards Mg 2+ , which can also generate an interfacial electric field to induce the dehydration of Li + , ultimately promoting the transmission of Li + across the membrane. The synergistic effect of size sieving, electrostatic repulsive and interfacial electric field is proposed as the fundamental mechanism of Li + selective separation. This work opens an avenue for designing new strategies to recover lithium from salt-lake, which can also potentially be extended to the recovery of strategic metals from other complex systems.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2019
·
IF 7.015
Guiliang Li,Wen Wang,Qile Fang,Fu Liu
Two dimensional covalent triazine frameworks (2D-CTF) with controlled pore size and stable structure are a new class of 2D building blocks for constructing separation membrane materials. In this work, we synthesize few-layer 2D-CTF-1 nanosheets with high crystallinity and excellent solvent dispersion using a micro-interface method. The as-prepared 2D-CTF-1 membrane via filtration assembly of few-layer 2D-CTF-1 nanosheets exhibits superior permeability due to its ultralow solvent-interface interaction and the abundant in-plane pores, with a water permeance of 141.5 L m −2 h −1 at 1 bar. The skeleton-pores are proved to be the main transfer channels on 2D-CTF-1 membrane, which are stable and nondeformable by external pressure. Size screening based on the cut-off of skeleton-pore (1.39 nm) is also demonstrated, which enables 2D-CTF-1 membrane a huge application potential in precise molecule/ion sieving. Besides, a stable layered structure in aqueous environment renders 2D-CTF-1 membrane with outstanding separation performance in the long-term running, continuously keeping high permeability and selectively. Thus, this work shows a promising application of 2D-CTF-1 as building blocks for 2D membrane construction in the separation field.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiawu Huang,Cuiting Yang,Shengjun Du,Lin Zhu,Zhenglin Du,Guang Miao,Chunshan Song,Jing Xiao
Adsorption-based capture of carbon dioxide (CO 2 ) to upgrade natural gas offer a promising solution for energy crisis and the reduction of CO 2 emission. However, trade-off between high adsorption selectivity and rapid kinetic is an inherent shortcoming of size-sieving based adsorptive separation of gas molecules at similar sizes, hindering the launch of sieving adsorbent for practical challenging selective gas capture. Herein, a gradiently porous carbon nanofiber PCF-800 with interconnected sieving ultramicropores and low-proportion surficial mesopores is tailor-made to simultaneously realize the exclusive and rapid capture of CO 2 from CH 4 . Arising from the unique interconnected micro-mesoporous structure, the as-prepared PCF-800 not only achieves remarkable uptake ratio of 45 (298 K, 1 bar) for CO 2 /CH 4 separation via size-sieving effect but also shows fast kinetic with diffusion rate of 1.35 × 10 -3 s −1 , outperforming the conventional ultramicroporous counterpart. Moreover, the impressive dynamic CO 2 /CH 4 separation factor up to 21.7 and satisfying cycling durability revealed by the breakthrough experiments further imply the industrial potential of PCF-800 in practical CH 4 purification. This work may shed light on the design of gradient sieving carbonaceous adsorbent with high selectivity and fast kinetic for extensive high-performance small gas separation.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Guangzhe Wang,Tao Wu,Junhui Zhao,Benbing Shi,Tianrun Gu,Runnan Zhang,Xiaoyao Wang,Roni Kasher,Yanlei Su,Zhongyi Jiang
Ionic covalent organic frameworks (COFs) hold great promise in regulating the structure of polyamide nanofiltration membranes for divalent ions removal. In this work, we demonstrate cationic COF (cCOF) nanosheets engineered polyamide membrane with excellent divalent cations rejection. cCOF nanosheets as versatile regulator and an interlayer accelerate the self-sealing and self-termination of interfacial polymerization between polyethyleneimine and trimesoyl chloride, endowing membranes with dense network and small thickness. Meanwhile, the quaternary ammonium groups on cCOF nanosheets increase positive charges on membranes. Through synergistic intensification of electrostatic repulsion and size sieving, the resulting cCOF-PA membranes display excellent rejection for divalent cations (MgCl 2 , 99.3%), superior to most reported polyethyleneimine-based polyamide membranes. This work highlights the significance of ionic COF materials in developing positively charged membranes for efficient ionic and molecular separations.
研究领域:
材料科学
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环境工程
·
膜技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yu Zheng,Zixu Yang,Zhichao Li,Wangluo Liu,Chao Yang,Jianliang Shen,Hui Wang,Kai Xu,Lijuan Cheng,Runnan Zhang,Zhongyi Jiang
Covalent organic framework (COF) has become a promising membrane material in chemical separations. However, the application of COF membranes for ion separation is still challenging, due to the mismatch between the pore size of COFs (1–5 nm) with the diameter of hydrated ions (<1 nm). Herein, a cationic polyelectrolyte surface modification strategy of COF membranes was proposed, by assembling a cationic polyelectrolyte (PEI, PDDA, PAH) layer on the surface of an anionic COF (TpPa-SO 3 H) membrane via dip coating. The cationic polyelectrolytes on the membrane surface offered abundant positive charges and reduced the surface pore size, leading to the synergistic enhancement of the size sieving and the electrostatic repulsion. Accordingly, effective rejection of multivalent cations was realized with a significantly increased rejection rate of 97.1 % for MgCl 2 , compared to that of TpPa-SO 3 H membrane (10.3 %). Furthermore, the polyelectrolyte-modified COF membrane exhibited desirable separation performance for heavy metal ions in water. The rejection rates for heavy metal salts, including CrCl 3 , CdCl 2, CuCl 2 , PbCl 2 and NiCl 2 , reached 98.5 %, 97.3 %, 97.0 %, 96.2 %, and 96.0 %, respectively, and remained above 95 % during the 7-day long-term operation test.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-19
·
IF 36.3
Kang Xiaoya,He Tianqi,Dang Hao,Li Xiangye,Wang Yumeng,Zhu Fuliang,Ran Fen
Shuttle effect of polysulfides overshadows the superiorities of lithium–sulfur batteries. Size–sieving effect could address this thorny trouble rely on size differ in polysulfides and lithium ions. However, clogged polysulfides pose some challenges for cathode and are rarely recycled during charging/discharging. Herein, an amino functionalized titanium-organic framework is designed for modifying lithium–sulfur batteries separator to address the aforementioned challenges. Wherein, the introduction of amino narrows titanium–organic framework pore size, enabling functional separator to selectively modulate lithium ions and polysulfides migration using size-sieving effect, thereby completely suppressing polysulfides shuttle. Furthermore, the blocked polysulfides will be adsorbed on the separator surface by positively charged amino leveraging electrostatic adsorption, ensuring polysulfides to redistribute and reuse, and boosting active materials utilization. Significantly, the migration of lithium ions is not hindered since there are lithium ions transfer channels formed via Lewis acid–base interaction with the help of amino. Combined with these virtues, the lithium–sulfur batteries with amino functionalized titanium-organic framework modified separator enjoy an ultralow attenuation rate of 0.045% per cycle over 1000 cycles at 1.0C. Electrostatic adsorption and Lewis acid–base interaction cover deficiencies existing in the inhibition of polysulfides shuttle by size-sieving effect, providing fresh insight into the advancement of lithium-sulfur batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zeyu Chang,Xiaoxia Jia,Tong Li,Yong Wang,Libo Li
In the petrochemical industry, the separation of C4 olefins is crucial but a challenging and energy-intensive process. In this study, two fluorinated anion-pillared hybrid ultramicroporous materials (HUMs), namely KAUST-7 (NbOFFIVE-1-Ni) and KAUST-8 (AlFFIVE-1-Ni), were explored for the efficient separation of ternary C4 olefin mixtures (C 4 H 6 /n-C 4 H 8 / iso -C 4 H 8 ) via gate-opening and size-sieving effects. KAUST-7, with a narrow and flexible pore window that completely excludes iso -C 4 H 8 , but allows for the absorption of C 4 H 6 and n-C 4 H 8 through gate-opening effects, with a preferential adsorption of C 4 H 6 due to its easier access to the channel. KAUST-8, on the other hand, with a larger pore window size and the strong H-bond interactions between the electronegative fluorine atoms from inorganic anion pillar and the C4 olefin molecules, efficiently separates iso -C 4 H 8 from C4 olefins, as the adsorption of both C 4 H 6 and n-C 4 H 8 is significantly enhanced while iso -C 4 H 8 retains much lower adsorption capacity. The relationship between the structures and separation properties of these materials is discussed, providing insight into the development of efficient separation materials. Fixed bed breakthrough experiments verify the excellent separation performances of KAUST-7 and KAUST-8 for C 4 H 6 /n-C 4 H 8 / iso -C 4 H 8 , highlighting their potential for industrial applications.
研究领域:
材料科学
·
石油化工
·
吸附分离技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wei Zhang,Qingbo Huang,Song Liu,Mengchen Zhang,Gongping Liu,Zhenliang Ma,Wanqin Jin
Separation of ions has wide applications both in industry and health care. Among them, the separation of mono-/di-valent ions remains great challenging, even for highly efficient membrane separation technology. The emerging two-dimensional-material (typically, graphene oxide, GO) membranes have shown outstanding molecular separation performance such as for water desalination and gas separation, while unattractive permeance and/or selectivity for separating mono/divalent ions. In this work, we designed a new type of GO membranes to separate mono-/di-valent ions, in which rationally-selected polyelectrolyte coating was introduced to simultaneously tune the surface charge and interlayer channels of assembled GO laminate. The resulting positively-charged membrane surface showed stronger repulsive force towards divalent cations over monovalent cations according to the Coulomb’s law; meanwhile, the regulated interlayer channels rejected divalent cations over monovalent cations with smaller size. The ion transport mechanism was understood by mathematic models of ion diffusion and DLVO theory. By utilizing the synergistic effect of electrostatic interaction and size sieving, the designed GO membrane exhibited excellent separation performance for various mono-/di-valent ion pairs, including K + /Mg 2+ , Na + /Mg 2+ , Li + /Mg 2+ . Especially, the K + transport rate of ∼ 0.29 mol m −2 h −1 and K + /Mg 2+ selectivity of ∼ 116 are demonstrated in single-salt solution test, outperforming the-state-of-the-art 2D-material membranes. In mixed-salt solution test, the K + /Mg 2+ selectivity reached 45 and good structural stability was displayed during 80 h continuous operation on the GO membrane. This facile polyelectrolyte coating approach provides a new avenue to develop high-performing 2D-material membranes for efficient separation of mono/divalent ions.
研究领域:
材料科学
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分离技术
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膜科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yunping Wang,Chenlin Mu,Jingtao Bi,Mengmeng Sun,Yingying Zhao
The monovalent cation exchange membrane (MCEM) plays a crucial role in strategic resource recovery fields such as lithium/magnesium separation and seawater softening. This study proposes a two-stage modification strategy of “nanoparticle deposition – quaternization cross-linking”: first, deposit the Polypyrrole -Polyethyleneimine (PPY-PEI) composite nanoparticles in situ on the commercial Cation Exchange Membrane (CEM) surface, and then undergo quaternization cross-linking to prepare a high-performance monovalent cation exchange membrane (MCEM). The rigid structure of Polypyrrole -Polyethyleneimine (PPY-PEI) nanoparticles completely avoids the traditional problem of monomer penetration, and the rate of membrane pore blockage is significantly reduced. Electrified nanoparticles form gradient nanochannels to achieve dual mechanism synergy: The surface positive charge layer repels and blocks Mg 2+ through the Donnan effect; 2–5 nm mesoporous channels facilitate K + transport through size sieving. Subsequent quaternization crosslinking strengthened the modified layer and increased the positive membrane charge density, leading to further improvement in perm-selectivity. The results show that the modified membrane achieves a breakthrough performance in the separation of K + /Mg 2+ : the selectivity reaches 6.9; the K + flux remains at 0.14/(m 2 ·s). Molecular dynamic simulation of the ion diffusion behavior confirmed that the presence of Polypyrrole -Polyethyleneimine (PPY-PEI) can accelerate the diffusion rate of K + while limiting the transport of Mg 2+ , providing a theoretical basis for the performance prediction of selective ion exchange membranes.
研究领域:
膜科学与技术
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分离工程
·
材料化学
·
环境功能材料
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离子传输
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电化学
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资源回收
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Shiyuan Liu,Wenpeng Li,Chongchong Chen,Jingjing Chen,Xiaoli Wu,Jingtao Wang
Molecule separation membranes with high flux and precise sieving are promising for discriminating xylene isomers. However, the thick separation layer (>300 nm) and dense inner structure with wide pore size distribution generally restrict the further development. Here, we demonstrate the preparation of novel thin-film composite membranes with sub-10 nm cyclodextrin (CD) nanofilms that are cross-linked on thin vermiculite (Vr) lamellar layer through electrostatic atomization-assisted interfacial polymerization technology. The regular Vr layer provides smooth and hydrophilic platform for synthesizing ultrathin and defect-free CD nanofilms. The as-prepared composite membranes achieve precise separation for xylene isomers and benzene derivatives based on size sieving effect using the intrinsic cavities in CDs. Meanwhile, the ultrathin CD nanofilms and regular Vr layer jointly contribute to fast molecule transfer. Specifically, TFC membrane with β -CDs nanofilm attains separation factor (SF) of 6.7 and 6.1 for p- xylene/ m- xylene (PX/MX) and p- xylene/ o- xylene (PX/OX), respectively, with the PX permeance of 7.9 and 7.8 L m −2 h −1 bar −1 . Moreover, the SF for cyclohexane/1,3,5-triisopropyl benzene reaches as high as 46.8 by membrane with α -CD nanofilm. In addition, these TFC membranes exhibit favorable structural and operational stabilities, providing insight into practical separation applications.
研究领域:
化学工程
·
材料科学
·
分离技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）