ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jia Wang,Yinghui Xu,Hongqiang Qu,Haiyun Ma,Ran Chang,Jing Ma
Delicately regulating the distribution morphology of a filler is an effective strategy to promote the separation performance of mixed matrix membranes (MMMs). Herein, we describe a highly permeable metal–organic framework (MOF)-based MMM comprising vertically aligned ZIF-8 (V-ZIF-8) and polysulfone (PSF). The V-ZIF-8 is distributed uniformly within the PSF matrix. With this unique distribution morphology of ZIF-8, the shortest gas transport pathways are formed in the membrane. Meanwhile, the molecular-sieving pores of ZIF-8 can allow CO2 to pass through and crowding out N2. The obtained V-ZIF-8/PSF membrane shows a high CO2 permeability of 89.7 Barrer and a CO2/N2 selectivity of 30.0 that is stable over a period of 50 h. The CO2 permeability is enhanced about 11.8 times than that of the pure PSF membrane. The results prove that the vertically aligned distribution morphology of an MOF in a polymer matrix is an effective method to improve the separation performance of a membrane, providing a new concept for designing more advanced membranes.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Yueping Bao,Wen-Da Oh,Teik-Thye Lim,Rong Wang,Richard David Webster,Xiao Hu
A novel Co 3 O 4 nanocatalyst functionalized Al 2 O 3 ceramic membrane (CoFCM) with a honeycomb structure was prepared via an optimized surface-nucleated zeolitic imidazolate framework (ZIF-67) growth method. The Co 3 O 4 hollow structure which was confirmed via chemical characterizations (XRD, FTIR, Raman and XPS), was formed on the membrane surface by one-step calcination of ZIF-67 membrane. The CoFCM was characterized by various techniques including the field emission scanning electron microscopy and atomic force microscopy. The results revealed the formation of well-defined Co 3 O 4 layer on the porous Al 2 O 3 ceramic membrane with the thickness of 1.5–2 µm. The growth mechanism of CoFCM was further proposed via XPS and the catalytic activity of CoFCM was investigated for the removal of sulfamethoxazole (SMX) with the addition of Oxone. The membrane performance was examined under a home-made dead-end mode. Results indicated that CoFCM has a rougher surface with an initial membrane resistance of 1.19 × 10 11 m −1 and performs outstanding catalytic activity. The pure water permeability of CoFCM is 3024 L m −2 h −1 bar −1 , which is comparable to that of the pristine ceramic membrane (<10% difference). The SMX removal efficiency achieved to >90% in 90 min with an Oxone addition of 0.1 g L −1 . Meanwhile, the membrane showed excellent durability by retaining >95% of initial flux for at least 3 operational cycles with a low cobalt ion leaching via Oxone-assisted cleaning. Furthermore, the reaction mechanism of Oxone activation by CoFCM was proposed from the results of the electron paramagnetic resonance (EPR) and radical scavenger experiments.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL RESEARCH
·
2024
·
IF 1
Lei Yang,Tangxuan Xu,Chenghao Li,Yuezhu Yang,Jing Huang
The zinc(II) bis-(8-hydroxyquinoline) (Znq2) has excellent photoluminescence properties, and its fluorescence emission can be significantly quenched by Fe3+ in water. To accelerate the detection response of Znq2 to Fe3+, a luminescent metal–organic framework Znq2@ZIF-8 based on guest molecular luminescence was constructed by growing zeolite imidazolate framework-8 (ZIF-8) on the outer surface of Znq2. The results show that the prepared Znq2@ZIF-8 has an octahedral core–shell structure, a particle size of approximately 1–3 μm, an enhanced specific surface area of 1105.41 m2 g−1, and with a stable green luminescence at 495 nm. A fluorescence analytical method was developed for the detection of Fe3+ in water, the correlation coefficients were significant in the Fe3+ concentration range of 0–600 μmol L−1, and the limit of detection was as low as 3.89 μmol L−1. The spiked recoveries of tap water samples demonstrated that the method could be applied to practical applications. The mechanism of fluorescence detection is that Fe3+ participates in the competitive coordination of Znq2@ZIF-8 metal centers, leading to the collapse of the crystal structure, meanwhile, Fe3+ produces a certain degree of competitive absorption of the excitation light of Znq2@ZIF-8. This method was applied for the detection of Fe3+ in water with good selectivity, anti-interference ability, and has the potential to be used as a rapid detection method.
研究领域:
分析化学
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材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 13
·5371-5386
·
IF 3.5
Cai Haopeng,Lin Zhenqin,Gao Lihua,Feng Chaochao,Tang Rui
Abstract The derivatives of metal–organic frameworks have been proven to be ideal candidates for microwave absorption due to their ability to form diverse microstructures of metals/heteroatom doped-carbon composites. In this study, we synthesized three types of zinc oxide (ZnO)@ZIF-8 with varying ZIF-8 shell thicknesses using ZnO colloidal spheres as sacrificial templates. Subsequently, we investigated the microwave absorption properties of a series of non-magnetic ZnO/N-doped carbon nanospheres pyrolyzed by ZnO@ZIF-8 at different temperatures. Remarkably, the non-magnetic samples (30 wt% filler loading) with a hollow structure pyrolyzed at 800 °C exhibited a broad effective absorption band exceeding 6 GHz. The excellent microwave absorbing performance of the samples pyrolyzed at 800 °C can be attributed to the reduction of the ZnO core to Zn 0 , anchoring it in the graphitized N-carbon layer, and the formation of an inner hollow cavity that enhances impedance matching. Therefore, this research not only provides an array of excellent dielectric-type microwave absorbing materials but also presents a novel strategy for developing lightweight and high-performance non-magnetic carbon-based microwave absorbing materials. Graphical abstract
研究领域:
材料科学
·
电磁材料
·
微波工程
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Zhiwen Lei,Jianwen Feng,Yu Yang,Jinlai Shen,Weide Zhang,Chaoyang Wang
Zeolitic imidazolate frameworks (ZIFs) possess tremendous potential in various adsorption and catalysis areas for their particular structures. However, the dispersibility and acid stability of ZIFs are important issues hindering their applications. To address these challenges, a transparent polydimethysiloxane (PDMS) coating was constructed to heterogeneously anchor the Cu doped ZIF-67 (Cu/ZIF-67) nanoparticles on melamine sponge surface, achieving a PDMS-coated ZIF three-dimensional composite sponge. Thus PDMS coating could also effectively protect ZIFs from acid damage to prolong the service life of photocatalyticity. It was demonstrated that the composite sponges were able to repeatedly (over 40 cycles) degrade Sudan I dyes with remarkable photocatalytic efficiency (>97%). More importantly, the ion impenetrability of PDMS coating made the ZIFs based composite a longer term catalytic life than unprotected Cu/ZIF-67 under acid condition. Incidentally, due to the introduction of rough ZIFs and hydrophobic PDMS coating, the obtained sponge also exhibits super-hydrophobicity (158.5°), great compressibility and excellent oil/acid water separation performance. We expect that such a polymer coating strategy could act as a novel inspiration for extending the applications and life span of ZIF-based composites.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 10
·3822-3827
·
IF 8.262
Fang He,Gang Chen,Yansong Zhou,Yaoguang Yu,Laiquan Li,Sue Hao,Bin Liu
A ZIF-8 derived carbon (C-ZIF)/g-C3N4 composite was constructed for the first time through facile thermal condensation of a zeolitic imidazolate framework (ZIF-8) and melamine. The obtained C-ZIF/g-C3N4 composite exhibited an obviously enhanced photocatalytic H2 production rate compared to pure g-C3N4 under visible light irradiation. The 1 wt% C-ZIF/g-C3N4 composite without loading the Pt co-catalyst showed 36.2 times higher H2 evolution rate than that of pure g-C3N4, which is even 2.8 times higher than that of Pt/g-C3N4 (the state-of-the-art g-C3N4-based photocatalyst). It was revealed by photoluminescence spectroscopy, time-resolved fluorescence spectroscopy and electrochemical impedance spectroscopy that the formed C-ZIF and g-C3N4 junction could promote quick charge carrier separation and transfer. The C-ZIF not only acted as an effective electron acceptor, but also functioned as an efficient hydrogen evolution reaction (HER) cocatalyst to promote photocatalytic hydrogen evolution. Our work provides an effective way for the development of metal-free, all carbon-based photocatalysts for H2 evolution.
✓ 已验证
产品关联
DOI
高影响因子
ACS Agricultural Science & Technology
·
2025
·
IF 2.9
Xiyue Zhang,Kui Sun,Zheng Zhang,Jun Yang
Plant pathogens pose significant threats to agricultural productivity and economic stability; therefore, the development of green broad-spectrum fungicides is critical to the long-term sustainability of agriculture. Here, zeolitic imidazolate framework nanoparticles (ZIF-8 NPs) with different charge properties were synthesized by a one-pot method and modified by different surfactants under the condition of a water phase at room temperature, which had an excellent bactericidal effect on model Gram-negative bacteria (Escherichia coli) and plant pathogenic bacteria (Xanthomonas axonopodis pv. citri and Pseudomonas syringae). Notably, the IC90 values of CTAB@ZIF-8 NPs for these bacterial strains were all below 50 μg/mL. In addition, ZIF-8 NPs also had antibacterial effects on fungi (Magnaporthe grisea) and oomycetes (Phytophthora infestans). ZIF-8 NPs can destroy the cell wall and cell membrane, eliminate the biofilm, produce ROS, cause DNA damage, and lead to cell death. Together, this work may provide ideas for the development of a promising, sustainable, efficient, broad-spectrum agricultural antimicrobial agent.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Kai Liu,Xin Zhang,Kaiqi Yang,Yonghou Zhao,Xinnan Ma
Osteoarthritis (OA) is a prevalent chronic joint disease characterized by progressive cartilage degradation, synovial inflammation, and subchondral bone remodeling. Current pharmacotherapies are limited by poor targeting, low bioavailability, and systemic side effects. Here, we developed a zinc-based metal–organic framework (ZIF-8) loaded with dimethyl malonate (DM), a succinate dehydrogenase inhibitor, for targeted OA therapy. The DM@ZIF-8 nanocomposites were synthesized via a one-step coprecipitation method and characterized using TEM, FT-IR, UV-Vis, DLS, and zeta potential measurements. The in vitro drug release profile showed pH-responsive behavior, with accelerated release under acidic conditions mimicking the inflammatory microenvironment. Cell viability and hemolysis assays demonstrated good biocompatibility. Macrophage polarization studies revealed that DM@ZIF-8 promoted M2 polarization, as indicated by increased CD206 and TGF-β expression and decreased CD86 and iNOS levels. In an OA rat model, DM@ZIF-8 significantly improved joint structure, reduced cartilage damage, and modulated inflammatory cytokines (increased IL-10/TGF-β, decreased TNF-α/iNOS). Histological and biochemical analysis confirmed no obvious systemic toxicity. Our findings suggest that DM@ZIF-8 is a promising nanoplatform for targeted OA therapy with improved efficacy and safety. In summary, this study utilizes ZIF-8 nanocarriers to deliver succinate dehydrogenase inhibitor (DM) for modulating macrophage polarization in the treatment of osteoarthritis.
研究领域:
纳米医学
·
风湿病学
·
药物递送
·
炎症性疾病
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Yangbo Qiu,Yidong Gao,Jingxiang Rockson Liu,Yuantian Cai,Ying Mei,Lei Xia,How Yong Ng,Yan Zhao,Bart Van der Bruggen,Chuyang Tang
Electro-driven membranes with monovalent ion selectivity represent a promising technology for sustainable lithium (Li) recovery from spent lithium-ion battery (LIB) leachate. However, existing membranes suffer from limited Li + selectivity and low ion permeation rates. In this study, a zeolitic imidazolate framework (ZIF)-embedded hydrogel electro-driven membrane was developed for selective Li + extraction via electrodialysis (ED). A poly(dimethyl diallyl ammonium chloride) (PDDA) network-threaded ZIF (QZIF) layer was in-situ constructed within the hydrogel matrix of Kevlar aramid nanofibers (KANFs), forming a stable composite layer on a sulfonated polysulfone (SPSF) substrate. Benefiting from the synergistic effects of size sieving and electrostatic repulsion, the resulting QZIF@KANF#SPSF membrane exhibited rapid Li + transport while effectively rejecting larger divalent ions (Ni 2+ , Co 2+ , and Mn 2+ ). During ED at 5 mA cm −2 , the QZIF@KANF#SPSF membrane achieved a Li + permeation rate of 0.45 mol m −2 h −1 in a 25 mM Li + , Ni 2+ , Co 2+ , and Mn 2+ mixed solution, with high permselectivities of 13.8, 12.2, and 10.5 for Li + /Ni 2+ , Li + /Co 2+ , and Li + /Mn 2+ , respectively. This strategy of embedding charged ZIFs within a hydrogel matrix provides a robust and scalable pathway for enhancing Li + selectivity and transport efficiency in advanced separation processes for spent LIB recycling.
研究领域:
材料科学
·
环境工程
·
膜技术
·
可持续资源回收
·
电化学分离
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 10
·4825-4832
·
IF 2.961
Yang Lu,Zhang Yu,He Zhiyuan,Tang Xin,Dong Qiaoyan,Tang Jiayuan,Huang Ke,Zou Zhirong,Yu Huimin,Xiong Xiaoli
Cobalt-based catalysts are widely used as non-enzymatic electrochemical sensors due to their high natural abundance, low-cost, tunable valence states, and high electron transfer efficiency. In this work, carbon matrix-embedded cobalt metaphosphate nanosheets (Co 2 P 4 O 12 -C/CC) was successfully prepared by a phosphorylation process of cobalt zeolitic imidazolate frameworks (Co-ZIF) grown on carbon cloth (CC). Benefiting from the many gaps between the carbon matrix-embedded nanosheet arrays, the specific surface area and active sites of the catalyst electrode and its stability are significantly increased. As a working electrode, a non-enzymatic electrochemical sensor for glucose was constructed. The sensor exhibits good sensitivity ( 2092 µA mM −1 cm −2 ) with linear range of 1.0 µM to 2.0 mM and detection limit of 0.12 µM (S/N = 3). Further analysis of human serum obtained satisfactory results. This work opens a new door for the construction and application of cobalt-based non-enzymatic electrochemical sensors.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Huan Gao,Fengqi Han,Shasha Yi,Lu Chen,Deliang Chen
Perovskite oxide (ABO 3 ) is a potential oxygen evolution reaction (OER) electrocatalyst , and its B-site is generally regarded as the active center. However, perovskite oxides suffer from poor conductivity and insufficient active sites due to severe calcination during high-temperature synthesis. To address these issues, we started from a well-demonstrated OER catalyst Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3-δ (BSCF) and developed an approach to load abundant active sites with the exsolution of CoFe nanoparticles from parent phase BSCF. During this process, ZIF-67 has been used as the carbon source to generate highly conductive network of cobalt-doped carbon and further fabricated as BSCF/ZIF (67) -650 composite. Such hybrid catalyst exhibits an overpotential of 285 mV at current density of 10 mA cm −2 and a minor Tafel slope of 40 mV dec −1 in 1 M KOH alkaline solution. The remarkably enhanced activity is attributed to the increment of active sites, oxygen vacancies and excellent conductivity. Importantly, such OER performance shows excellent stability for 200 h operation.
研究领域:
材料科学
·
电化学
·
能量存储与转换
·
纳米材料
·
催化
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Xuanxuan Cheng,Zhongyi Jiang,Xiaopo Cheng,Hao Yang,Lei Tang,Guanhua Liu,Manru Wang,Hong Wu,Fusheng Pan,Xingzhong Cao
Incorporating metal-organic frameworks (MOFs) into polymer to fabricate hybrid membranes is an effective approach of breaking the trade-off between permeability and selectivity. In this study, hollow zeolitic imidazolate framework-8 (HZIF-8) nanospheres were prepared and blended into sodium alginate (SA) matrix to fabricate water-selective hybrid membrane, which intensify the diffusion process of water molecules dramatically owing to their well-designed hierarchical structures. The micropores on HZIF-8 nanosphere shell have a molecular sieving effect, which enhances diffusion selectivity of water molecules. The hollow structure of HZIF-8 nanospheres ensures the rapid diffusion of water molecules, thus elevating the permeation flux and separation factor simultaneously. Besides, the intervention effects of HZIF-8 nanospheres on the SA chain packing also contribute to the enhancement of permeation flux and separation factor by rendering the membrane more free volume cavities and suitable free volume cavity size for ethanol/water separation. When utilized to separate 90 wt% ethanol aqueous solution at 76 °C, the hybrid membrane containing 6 wt% HZIF-8 displays the highest separation performance with permeation flux of 2485 g/m 2 h and separation factor of 1884, much superior to those for pure SA membrane and the hybrid membranes incorporating zeolitic imidazolate framework-8 (ZIF-8) nanocrystals . Desirable long-term stability of the hybrid membranes was also acquired.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）