Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Wang Chenxing,Duan Peng,Huang Yinpeng,Lu Xulei,Fu Chunqiao,Zhang Yong,Qian Linmao,Yang Tingting
Water and ion channels are crucial for moisture energy harvesting, requiring precise pore design for mass transfer control. However, the key challenge lies in managing the localized assembly process of membrane materials to arrange them orderly, forming confined mass transfer pathways and stable solid-liquid interfaces. This is essential for exploring the interrelationship among channel morphological characteristics, mass transfer dynamics, and device power generation performance. This work proposes the use of freeze-assisted salting-out to meticulously construct hydrogel bilayer membranes with micro-meso-macroporous oriented channels and asymmetric charge characteristics. The produced polyvinyl alcohol/MXene hydrogel devices achieved a V oc × J sc of 11.4 μW cm −2 (pure hydrovoltaic effect) and 146 μW cm −2 (with active electrodes) at 25 °C, 45%RH, surpassing most moisture-based generators. In addition, the power generation performance is highly consistent with the Hofmeister series, with stronger salting-out effect to obtain more micropores and mesopores, and ice crystal growth can help obtain ordered macropores. It has faster water transport rate, higher ionic conductivity, better ionic selectivity, and stronger channel stability than traditional moisture-based power generation membranes. This relationship between pore tuning from salt ions and device power generation performance provides a design basis for the development of high-performance moisture-based power generators.
研究领域:
材料科学
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纳米能源
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物理化学
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环境功能材料
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仿生通道工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Hong-Qing Liang,Ke-Jia Ji,Li-Yun Zha,Wen-Bing Hu,Yang Ou,Zhi-Kang Xu
Polymer membranes with well-controlled and vertically oriented pores are of great importance in the applications for water treatment and tissue engineering. On the basis of two-dimensional solvent freezing, we report environmentally friendly facile fabrication of such membranes from a broad spectrum of polymer resources including poly(vinylidene fluoride), poly(l-lactic acid), polyacrylonitrile, polystyrene, polysulfone and polypropylene. Dimethyl sulfone, diphenyl sulfone, and arachidic acid are selected as green solvents crystallized in the polymer matrices under two-dimensional temperature gradients induced by water at ambient temperature. Parallel Monte Carlo simulations of the lattice polymers demonstrate that the directional process is feasible for each polymer holding suitable interaction with a corresponding solvent. As a typical example of this approach, poly(vinylidene fluoride) membranes exhibit excellent tensile strength, high optical transparence, and outstanding separation performance for the mixtures of yeasts and lactobacilli.
研究领域:
材料科学
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环境工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
·
IF 9
Cuijing Liu,Lei Li,Linbo Li,Xihong He,Hideto Matsuyama
Covalent organic framework (COF) emerges as a promising membrane material for ion separation, such as Li + extraction from brines. However, the single-functionalization of most COF channels hinders further improvements in separation efficiency. Herein, the angstrom size, positive charge and Li + affinitive sites have been integrated in the channels of triaminoguanidine (TG)-based COF membranes. Aldehydes with different lengths of oxygen-containing side chains were employed to precisely tune the size and ion affinity of the channels. Precisely engineered cationic channels with moderate pore size and Li + affinitive sites enable Mg 2+ rejection through synergistic size exclusion and Donnan exclusion, while simultaneously accelerating Li + permeation via affinitive interactions. The optimized membrane, TG-1, achieves a remarkable Li + /Mg 2+ selectivity of 423 with a Li + permeation rate of 34.02 mmol m -2 h -1 . Additionally, TG-1 is able to perform well in practical conditions including high Mg 2+ /Li + mass ratio, high temperature, long operation time and also in various mono-/divalent metals separations. This study offers insights in the construction of multi-functional membrane channels for efficient ion separations.
研究领域:
材料科学
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化学工程
·
分离技术
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Jian Lv,Xue Wu,Mansha Wu,Xiaoyuan Wang,Lijuan Gong,Dawei Li,Ruocan Qian
Glass nanopipets have been demonstrated to be a powerful tool for the sensing and discrimination of biomolecules, such as DNA strands with different lengths or configurations. Despite progress made in nanopipet-based sensors, it remains challenging to develop effective strategies that separate and sense in one operation. In this study, we demonstrate an agarose gel-filled nanopipet that enables hyphenated length-dependent separation and electrochemical sensing of short DNA fragments based on the electrokinetic flow of DNA molecules in the nanoconfined channel at the tip of the nanopipet. This nanoconfined electrokinetic chromatography (NEC) method is used to distinguish the mixture of DNA strands without labels, and the ionic current signals measured in real time show that the mixed DNA strands pass through the tip hole in order according to the molecular weight. With NEC, gradient separation and electrochemical measurement of biomolecules can be achieved simultaneously at the single-molecule level, which is further applied for programmable gene delivery into single living cells. Overall, NEC provides a multipurpose platform integrating separation, sensing, single-cell delivery, and manipulation, which may bring new insights into advanced bioapplication.
研究领域:
生物分析化学
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纳米技术
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分子生物学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 8
·期 3
·391-405
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IF 5.047
Xue Feng,Peifang Xu,Tao Shen,Yihan Zhang,Juan Ye,Changyou Gao
The regeneration of osteochondral defects faces great challenges because of the limited self-regenerative capabilities of cartilage tissues. In situ inductive regeneration can be realized using bioactive scaffolds combined with endogenous reparative cells. Cell migration could be significantly facilitated by scaffolds with oriented channels. For this purpose, silk fibroin (SF) was composited with collagen (Col) to fabricate extracellular matrix (ECM)-mimetic SF/Col composite scaffolds with random pores, radially aligned pores or axially aligned pores by ice-templated assembly and temperature gradient-guided thermally-induced phase separation. Scanning electron microscopy (SEM) observation confirmed the random and aligned architectures in the respective scaffolds. The three kinds of SF/Col composite scaffolds exhibited a porous structure with a porosity of ∼85%, an appropriate elastic modulus with mechanical anisotropy in the aligned scaffolds, and good biocompatibility. The oriented channels could improve in vivo cell migration and infiltration. During the tissue remodeling processes, the regeneration of osteochondral tissues particularly cartilage was obviously faster in the radially aligned scaffold group than in the other two groups. Nevertheless, satisfactory regeneration was achieved in the two aligned scaffold groups with hyaline cartilage formation at 18 weeks post-surgery, while a hybrid of hyaline cartilage and fibrocartilage was formed in the random scaffold group.
研究领域:
生物材料学
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再生医学
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
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2023
·
IF 8.3
Siying Wang,Yili Wang,Shuoxun Dong,Xiaolin Li,Chenyang Liu
Phosphorus (P) removal from wastewater is critical for ecosystem operation and resource recovery. To facilitate the recycling of the used absorbents through balancing their adsorption and desorption performance on P, in this work, a novel porous magnetic La(OH) 3 -loaded MAPTAC/chitosan (CTS)/polyethyleneimine (PEI) ternary composite hydrogel (p-MTCH-La(OH) 3 ) with enhanced bifunctional adsorption sites was synthesized by simultaneous dissolution of pre-embedded CaCO 3 and CTS powder, followed by grafting PEI and loading La . Hierarchical porous channels promoted good dispersion of La(OH) 3 , bringing an excellent P adsorption capacity of 107.23 ± 4.96 mg P/g at neutral condition. PEI grafted with CTS increased the surface charge and enhanced the electrostatic attraction, which facilitated the desorption of P. The porous structure and abundant active sites also facilitated rapid adsorption with an adsorption rate constant of 0.1 g mg −1 h −1 . p-MTCH-La(OH) 3 maintained effective P adsorption despite co-existence with competing substances and after 5 cycles. Further mechanistic analysis indicated that La–P inner sphere complexation and LaPO 4 crystalline transformation were the main pathways for P removal. However, electrostatic interactions contributed 17.5%–46.7% of the adsorption amount during the first 30 min of rapid adsorption, enabling 92.8% of the adsorbed P at this stage to be desorbed by alkaline solution. Based on the variations of adsorption and desorption capacity with adsorption time, a rapid unsaturated adsorption of 1–2 h was proposed to facilitate the recycling of the adsorbent. This study proposed a method to promote P adsorption and desorption by enhancing bifunctional adsorption sites, and proved that p-MTCH-La(OH) 3 is a promising phosphate adsorbent.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
·
IF 3.573
Yu Zhao,Jun Xu,Jing Wang,Jinglan Wu,Meizhen Gao,Bin Zheng,Hong Xu,Qi Shi,Jinxiang Dong
The objective of this work is to study the adsorptive separation of the biomass-derived furfural (Fur) and 5-hydroxymethylfurfural (5-HMF). Because Fur and 5-HMF have similar ellipsoidal shapes, the diffusion of the larger 5-HMF may be blocked by the elliptical window of adsorbents. Thus, two zeolitic imidazolate framework (ZIF) materials with the identical chemical composition, MAF-6 and MAF-5, were used as spherical and ellipsoidal pore adsorbents, respectively. In the dynamic column adsorption of a binary-component system (Fur/5-HMF, 5/5 wt %) in an aqueous solution, the adsorption amounts of Fur on MAF-6 display a 13% decrease compared with the single-component system, whereas the adsorption amounts of Fur on MAF-5 are identical to those obtained in the single-component system and the amounts of adsorbed 5-HMF are almost negligible. Thus, the Fur/5-HMF selectivity is only 6.4 for MAF-6, whereas the selectivity reached 115.8 for MAF-5. The results show that the narrow elliptical window/ellipsoidal tile of MAF-5 enhanced separation selectivity compared with the larger circular window/spherical cage of MAF-6. In addition, the general rate model and density functional theory calculations further verify that the elliptical window of MAF-5 exhibits a strong mass-transfer barrier that must be overcome for the diffusion of the larger 5-HMF molecules.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Zhe Wang,Yansha Zeng,Yue Shen,Qiyin Tan,Jiahao Sun,Jiaheng Teng,Hongjun Lin
Incorporating inorganic porous materials into polymer membranes presents a promising strategy to rectify their inherent imperfections. Nonetheless, achieving peak efficiency necessitates pores oriented perpendicular to the membrane surface, a feat that remains challenging due to orientation control complexities. In this study, a novel synthesis approach for two-dimensional (2D) mesoporous silica nanoparticles (MSN) featuring high aspect ratios and vertical pore channels is presented. These channels, oriented perpendicular to the membrane surface, optimize water permeability. This unique orientation is meticulously achieved via cetyltrimethylammonium bromide (CTAB) acting as a surfactant at the nexus of polar and non-polar fluids, guaranteeing interface evenness. Intriguingly, the resultant mesoporous compound harbors both micro and mesopores—a phenomenon attributed to surfactant non-polar segment expansion within non-polar solvents or the distinct U-shaped interface upon contact with hydrophilic mesoporous entities. After depositing a tannic acid (TA) coating on a polyvinylidene fluoride (PVDF) base membrane, 2D MSN was fixed on the membrane surface using polyethyleneimine (PEI) as a linker through strong hydrogen bonding . Thanks to the asymmetric structure of the mesoporous separation layer combining micro and mesopores , the perpendicular pore channels with superhydrophilic features, water can permeate through the separation membrane with the shortest distance and lowest resistance, achieving an ultra-high pure water permeation volume of 394.5 L −1 h −1 bar −1 . The uniform pore channels of 2D MSN show a rejection rate of over 97% for large molecular dyes such as Evans blue (EB), Congo red (CR), and Rose Bengal sodium (RB). This work not only advances the synthesis of two-dimensional materials with vertical pore channels but also underscores their potential in membrane separation applications.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Fei He,Wenjie Li,Lijuan Yang,Zhen Zhu,Liang Zhou,Xin Zhang,Xiaodong He
Unidirectional alumina aerogels (AAs) were prepared by simultaneously using boehmite hydrosols and alumina nano-powder as solid solutes at different freezing temperatures. In order to understand the porous structural characteristics under different freezing parameters, the real-time frozen parameters were recorded at the designated positions under different freezing temperatures. Fourier transform infrared (FT-IR) spectra, X-ray diffraction (XRD), mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM) were used to investigate the functional groups, phase composites, microstructures and porous characteristics. The regularities and influence factors of unidirectional porous structures of AAs were detailedly explored under different frozen parameters. The results show that the AAs are characterized with unidirectional porous structures at the direction of ice-crystal growth. The cooling rate and ice front rate ( v inf ) increase and the structure wavelengths ( λ s) decrease with the decrease of the freezing temperature. The relationship between λ and v inf approximately satisfies a power law, which perhaps is related to the uniform dilute solution containing nanoparticle .
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 23
·2314288
·
IF 18.5
Yanpeng Fan,Zhi Chang,Zhonghan Wu,Yang Feng,Xiaomeng Du,Meihong Che,Jing Tian,Wei Xie,Kai Zhang
Sodium-ion batteries (SIBs) are considered as a promising candidate for large-scale electrochemical energy storage devices due to their low cost, abundant upstream resources, and compatible manufacturing processes with lithium-ion batteries. However, the highly active free solvent molecules in the liquid electrolyte trigger continuous interfacial side reactions between electrodes and electrolyte, which degrades the cycling performance of SIBs. Herein, a Cu-based metal-organic framework (MOF) with a uniform nanoporous channel of 1.1 nm is exploited to confine the electrolyte. Benefiting from the highly-aggregated solvation configuration, the MOF-confined electrolyte possesses superior chemical/electrochemical and thermal stability, which guarantees its interface compatibility and flame retardancy. As a result, the batteries with the nano-confined electrolyte and Na 3 V 2 (PO 4 ) 3 cathode show an ultra-long lifetime of 3000 cycles with 93% capacity retention and decent high-temperature performance (600 cycles with 90% capacity retention). This work presents a viable method for fabricating sustainable SIBs and also provides guidance for solving the side reactions between electrolytes and electrodes in electrochemical energy storage systems.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Mengyao Zhu,Guang He,Zongwei Wang,Junhao Chen,Xiang Fu,Huiyu Yang,Pei Lyu,Shaojin Gu,Xin Liu,Bin Shang
Sorption-based atmospheric water harvesting (SAWH) with metal–organic frameworks (MOFs) offer a promising solution to freshwater scarcity in arid regions. However, given the powder nature of MOFs, scaling-up such a concept with industrially favorable monolithic MOFs in bulky sizes remains challenging. In this study, a pore vertically aligned nanocomposite sorbent where MOF-801 is anchored at the polymeric structure surface was prepared via Fe 3+ -induced crosslinking and directional freezing methods. The continuous vertically aligned hierarchical pores not only offer sufficient sites for MOF-801 loading but also provide rapid moisture transport channels, as well as high solar-thermal conversion efficiency, resulting in a rapid ab/desorption duration of 2 h (including an absorption process for 1 h and a desorption process for 1 h under 1 sun irradiation) and multicycle daily water production of 1.40 L kg −1 at low RH of 20 % and 5.57 L kg −1 at higher RH of 80 %, respectively, which is outperformed most of the state-of-the-art MOFs based SAWH materials. This work provides a simple and effective way to shorten MOF-801 ab/desorption duration, which has great means for designing of high-performance solar-driven water harvesting materials.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 51
·2107246
·
IF 18.808
Hongli Deng,Lei Wang,Shengyang Li,Meng Zhang,Tao Wang,Jian Zhou,Maoxin Chen,Song Chen,Jinhui Cao,Qiusheng Zhang,Jian Zhu,Bingan Lu
Constructing electrode materials with fast ions and electrons transport channels is an effective solution to achieve high-power-density and long-cycle potassium-ion batteries (PIBs). Herein, completely opening radial pores in N/O dual-doped carbon nanospheres (RPCNSs) are constructed as anode for high-power PIBs. The RPCNS with hierarchical structure (micro/meso/macropores and radial channels) and N/O dual-doping permits speedy ions and electrons transportation within the carbon nanospheres anode, achieving a reversible capacity of 346 mAh g −1 at 50 mA g −1 after 360 cycles and long-term cycling life over 2000 cycles without obvious capacity attenuation. The in situ Raman and kinetic analysis (in situ electrochemical impedance spectroscopy and galvanostatic intermittent titration) suggest that the exquisitely designed pore structure and heterodoping enable highly reversible electrochemical reaction and fast de/intercalation kinetics. Moreover, the full cells packaged with RPCNS anode can be fully charged in 10 s and exhibit the highest charge power density of 24 866 W kg −1 and longest cycling endurance of 5000 cycles in reported PIBs. The unique structural engineering provides a new way for high-power density potassium-ion storage devices.
研究领域:
材料科学
·
电化学
✓ 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）