Colloid and Interface Science Communications
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2021
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IF 4.914
Runzhi Wei,Zheng Liu,Wenchang Wei,Sheng Wang,Yi-ju Lv,Guo-Cheng Han
Two nano metal-organic frameworks (NMOFs), [Cu(2,6-dmy-3,5-pyda) 4 ] n (namely Cu-MOFs) and {[Zn(2,6-dmy-3,5-pyda) 2 (4,4′-bipy) (H 2 O)]•H 2 O} n (namely Zn-MOFs) with the unsaturated metal sites were hydrophobically modified by octadecylphosphonic acid (OPA) to prepare MOFs/OPA hydrophobic composites, which were added as hydrophobic additives to the epoxy (EP) coating to prepare Cu-MOFs/OPA/EP and Zn-MOFs/OPA/EP anticorrosion coating. The corrosion protection behavior of these coatings was examined in 3.5 wt% NaCl solution by using EIS, the capacitive arc of the coating modified with Cu-MOFs/OPA and Zn-MOFs/OPA was larger than EP, and R p increases from 1.283 × 10 7 to 6.111 × 10 8 and 7.415 × 10 8 , respectively. The two anticorrosion coatings showed higher impedance modulus values in low frequency region. All the study results proved that both Cu-MOFs/OPA and Zn-MOFs/OPA composite materials with the EP coating provided a very strong barrier and shielding effect, and have the ability to enhance the anticorrosive performance of the epoxy coating
研究领域:
材料科学
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腐蚀科学
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表面工程
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化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Yingnan Ma,Na Liu,Yulu Zhang,Zhen Xu,Juan Chen,Hong Wu,Jianqiang Meng
The gutter layer of thin film composite membranes (TFCMs) promotes the formation of ultrathin top layers. MOFs nanosheets gutter layer is an efficient strategy for building gas separation TFCMs while suffers from such an issue that gas molecules transport between interlayer thus making it difficult to fully utilize the excellent molecule sieving ability of MOFs. In this work, both MOFs nanosheets and continuous MOFs gutter layers were constructed to prepare TFCMs for CO 2 separation. The polyamide top layer with irregular structure was formed on MOFs gutter layer by interfacial polymerization. The physical and chemical properties as well as separation performance of different TFCMs were further compared. Benefitting from the denser structure and stronger hydrophobicity of continuous ZIF-8 gutter layer, the obtained top layer showed more regular structure with ultrathin thickness (≈30 nm). At the same time, due to the ZIF-8 gutter layer provided additional and stable CO 2 selectivity, the CO 2 permeance reached 588.2 GPU with the selectivity of CO 2 /N 2 and CO 2 /CH 4 of 49.8 and 52.3, which surpassed the 2008 Robeson upper bound. We believe that such a membrane design based on continuous MOFs gutter layers is a promising approach for high-performance gas separation membranes.
研究领域:
材料科学
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化学工程
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气体分离技术
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产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2024
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IF 4.3
El-Refaie Kenawy,Elbadawy A. Kamoun,Zeinab S. Ghaly,Abdel-baset M. Shokr,Shahira H. EL-Moslamy,Ahmed S. Abou-Elyazed
In this study, we demonstrate the production of Cu-based metal-organic frameworks (MOFs) (HKUST-1) and F–Cu-MOFs (F-HKUST-1)-loaded electrospun polyvinyl alcohol/gelatin (PG) nanofibers for enhancing wound healing and antimicrobial activity in fabricated mats. Copper-and fluorine-based metal-organic frameworks were successfully prepared under different conditions. The MOF/PG nanofibers were characterized for their physicochemical properties, including mechanical strength and water uptake, using FTIR, XRD, SEM, EDX, and TGA analyses. The results revealed that MOFs and F-based MOFs incorporated into PG nanofibers exhibited good mechanical and thermal properties. FTIR and XRD analyses confirmed the functional groups and structural integrity of the prepared MOFs. The antimicrobial efficacy tests showed the highest growth reduction percentages in Staphylococcus aureus (99.72 ± 0.78 %), Klebsiella pneumoniae (97.76 ± 0.44 %), and Candida parapsilosis (94.50 ± 0.75 %). The biocompatibility of PVA, combined with gelatin's ability to stimulate epithelialization and granulation tissue development, contributed to improving the wound healing. The addition of HKUST-1 and F-HKUST-1 further enhanced the antimicrobial and wound healing effects.
研究领域:
材料科学
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生物医学工程
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微生物学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Wenji Zheng,Yuehu Guo,Ziheng Li,Xuehua Ruan,Xiaobin Jiang,Tiantian Li,Xiangcun Li,Yan Dai,Gaohong He
Polymer-supported MOFs membranes with high separation performances show great potentials in industrial purification of H 2 . The key to growing defect-free and adherent MOFs layers on polymer substrates is the abundant and uniformly distributed nucleation sites on the surface of polymer substrates. Therefore, in this work, a mixed-matrix polyacrylonitrile (PAN) substrate with ZIF-8-rich seed layer (ZS-PAN) was constructed by gravity induced deposition and gradient distribution of ZIF-8 before phase inversion, then under the assistance of Tannic acid (TA), the dense and defect-free ZIF-8 membrane on flexible polymer substrate was fabricated followed by the secondary growth of ZIF-8. The EDS and SEM results of the membrane cross-section confirm the gradient distribution of ZIF-8 seeds, and the resultant membranes are defect-free. The H 2 permeance of TA-ZIF-8/ZS-PAN membrane is 953.66 GPU, and the H 2 /CO 2 selectivity is 12.09, which is 80.17 % higher than that of ZIF-8/ZS-PAN membrane without TA, exceeding the Robeson upper bound in 2008. This improved H 2 separation performance is derived from the following reasons. First, gravity-induced ZIF-8 seed deposition constructs a ZIF-8-rich seed layer on the mixed-matrix polymer substrate, which increases the nucleation sites. Second, the introduction of TA during the secondary growth process further increases the nucleation sites by hydroxyl-chelated zinc ions, both of which contribute to the dense ZIF-8 membrane. At the same time, the hydroxyl group in TA is CO 2 -philic, which can delay CO 2 permeation and improve the H 2 /CO 2 separation performance by physically adsorbing CO 2 . The proposed mixed-matrix substrate by gravity induced deposition of MOFs provides a novel strategy for constructing defect-free and flexible MOFs membrane.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
Chemistry-An Asian Journal
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2021
·Vol. 16
·期 22
·3743-3747
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IF 4.568
Min-Jie Chen,Gang-Gang Chang,Li-Yan Chen,Ke-Xin Huang,Chun Pu,Dan Li,Yao Yao,Jia-Xin Li,Xiao-Yu Yang,Banglin Chen
Graphical The core-shell catalyst with surface wrinkles greatly improves the selectivity of tandem catalysis. Process intensification, targeting the maximization of spatial-temporal productivity utilizing minimum energy and resources has always been the constant trends especially in chemical industry. In this regard, tandem reactions that are able to perform a multi-step reaction in a single pot by eliminating costly separation steps have been viewed as a typical paradigm. However, a spatial isolation of varied active sites with a controlled manner in a single catalyst to avoid deactivation and work synergistically is a challenging problem yet sometimes being overlooked. In this work, a spatial base-metal core-shell structured catalyst with wrinkled surface was successfully fabricated by a direct homoepitaxial growth method in an acid/water system, which exhibited increased hydrophobicity, exposure of active sites and significantly improved product selectivity towards one-pot Knoevenagel condensation-hydrogenation tandem reaction compared with the uncoated catalyst. Meanwhile, the catalytic performance was largely retained and the structural stability was maintained even after successive 8 cycles, which shows great promise for industrial applications.
研究领域:
化学工程
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材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Jie Chen,Jianzhong Ma,Qianqian Fan,Wenbo Zhang,Ruyue Guo
The development of chrome-free tanning agents is of great significance for the green and sustainable improvement of the leather industry. Metal organic framework (MOFs) is a kind of nanomaterial with steady framework formed by the coordination of metal clusters with organic ligands, which gives it a natural self-masking structure. Herein, two kinds of bimetallic MOFs were obtained via post-synthesis modification and used in the tanning to produce leather with good hydrothermal stability. M n+ - replacing Zr-MOFs is denoted as Zr/M−MOFs (M n+ = Ti 4+ , Al 3+ ). Zr/M−MOFs were characterized by XRD, SEM, FT-IR, TG, XPS, and N 2 adsorption/desorption. The results indicate that M n+ - replacing provides more active site that can be combined with collagen fibers. Compared to the Zr-MOFs tanned leather (75.3 °C), the shrinkage temperature of Zr/M−MOFs tanned leather (79.9 °C) has been further improved. In addition, Zr/M−MOFs can also avoid the problems caused by traditional metal tanning, such as the worse washability of aluminum tanning. A new strategy to improve the tanning performance of MOFs-based tanning agents was provided. It gives a new approach to the development of chrome-free tanning agents.
研究领域:
材料科学
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皮革化学与工程
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环境科学
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2019
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IF 1.795
Qing-Qing Huang,Yang-Jie Lin,Rui Zheng,Wei-Hua Deng,Chiranjeevulu Kashi,P. Naresh Kumar,Guan-E Wang,Gang Xu
Metal-organic frameworks (MOFs) are a kind of functional porous materials with the potential applications in gas adsorption and separation, catalysis, energy storage, sensor, and electrical conductivity . However, the insulating nature of the mostly MOFs limits their application in the electronic field. A new three-dimensional (3D) metal-organic framework composed of Cu 2+ centres and polyacid linkers (TATAB 3− ) was synthesized by solvothermal method , which contains two types of Cu 24 cages. The crystal structure is cubic and each Cu is coordinated by five oxygen atoms which can be confirmed by the single crystal X-ray diffraction, infrared spectra and TGA analysis. The conductivity for this 3D MOF is increased by four orders of magnitude after doping with 7,7,8,8-tetracyanoquinodimethane (TCNQ) and realizes the transformation from an insulator to semiconductor.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
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2024
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IF 7.2
Jingwen Chen,Ke Li,Jian Yang,Fan Xia,Ximeng Liu,Jinlou Gu
Despite that multi-modal hierarchically porous metal–organic frameworks (MOFs) are highly desirable due to their capability for the spatial organization of different host reaction, their facile synthesis templated by a single surfactant system is still challenging. Herein, we developed a temperature-controlled strategy to synthesize trimodal hierarchically porous Ce-based UiO-66-type MOFs (THPUiO(Ce)) with tailorable core–shell configurations by using nanoemulsions as soft templates. The hierarchical pore sizes and structures of cores and shells are controllable by facilely manipulating two-step temperatures and the components of the nanoemulsion. For a given nanoemulsion system, when the initial synthetic temperature is higher than the second one, the resultant THPUiO(Ce) is composed of dendritic channels (30–50 nm) in cores and smaller cage-like mesopores (15–20 nm) in shells. Reversely, when the initial synthetic temperature is lower than the second one, the smaller mesopores (around 15 nm) are located in cores surrounded by large pore channels. Similarly, trimodal hierarchically porous bimetallic THPUiO(Ce/Zr) can also be constructed upon extending this temperature-controlled approach, in which the molar ratio of the Zr content could be tuned up to 48%. In virtue of the inhomogeneous nature of THPUiO(Ce), the hollow Ce-based MOFs with mesopores distributed on 60 nm thickness shells can be achieved after the acid treatment of THPUiO(Ce). This facile assembly approach is expected to set a guideline for the construction of hierarchically porous MOFs for potential multicompartmental related applications.
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
QUIMICA NOVA
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2024
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IF 0.5
Wei Fuhua,Ren Qinhui,Wang Nannan,Chen Hongliang,Zhang Yutao,Liang Zhao
The synthesis of Fe-MOFs (metal-organic frameworks) was conducted using a solution heat method, followed by characterization through XRD (X-ray diffraction), SEM (scanning electron microscopy), and TG (thermogravimetry) analysis techniques. Subsequently, the Fe-MOFs were employed for norfloxacin removal. The experimental findings demonstrate that theoretical simulations of norfloxacin adsorption by Fe-MOFs involved the application of pseudo-first kinetic model, pseudo-second kinetic model, and adsorption isotherm. Chemisorption was identified as the primary mechanism observed. Notably, a maximum adsorption capacity of 197.7 mg g-1 was achieved at pH 10. These results underscore the practical feasibility of utilizing Fe-MOFs in applications related to norfloxacin adsorption.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 15
·4773
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IF 4.927
Xin Yang,Tie Shu,Xianfeng Yang,Min Qiao,Dashuang Wang,Xinghua Li,Jinsong Rao,Zhaohui Liu,Yuxin Zhang,Pingan Yang,Kexin Yao
Reasonable structural design and composition control are the dominant factors for tuning the electromagnetic absorbing properties of materials. In this paper, microspheres composed of NiO, Ni, and Co3O4nanoparticles (NCMO) were successfully synthesized using a mild oxidation method. Benefiting from the multi-component composition and a unique microstructure, the RLminof CNMO can reach −46.8 dB at 17 GHz, with an effective absorption bandwidth of 4.1 GHz (13.9–18 GHz). The absorbing properties and the absorbing mechanism analysis showed that the microsphere-structured NCMO composed of multi-component nanoparticles enhanced the interface polarization, thereby improving the absorption performance. This research provides a new avenue for MOF-derived oxide materials with excellent electromagnetic wave absorbing properties.Keywords:electromagnetic wave absorption;MOFs;nanoparticles;metal oxide
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Applied Materials Today
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2021
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IF 10.041
Yue Hu,Zhou Fang,Xu Ma,Xinyi Wan,Shilin Wang,Shuaikang Fan,Zhizhen Ye,Xinsheng Peng
Harvesting water from atmosphere is emerging as a potential strategy to solve the problem of water scarcity. In this work, CaCl 2 encapsulated Fe-ferrocene MOFs hollow microspheres (CaCl 2 @Fe-Fc-HCPs) were successfully fabricated. CaCl 2 plays as water sorbent and Fe-Fc-HCPs act as photothermal components for rapidly water release. In CaCl 2 @Fe-Fc-HCPs composites, the dissolving CaCl 2 in the adsorbed water are effectively prevented, while the water adsorption capacity of the encapsulated CaCl 2 is improved. The amount of water adsorbed by CaCl 2 @Fe-Fc-HCPs (80% RH, 15 °C) is 2.685 g H2O /g CaCl2 , 2.23 times as that adsorbed by pristine CaCl 2 powder. Furthermore, the hollow structure Fe-Fc-HCPs MOFs favorable for loading CaCl 2 nanoparticles and facilitating mass transport. The adsorbed water can be easily released by a simulated solar light (one sun) due to the high efficient photothermal property of Fe-Fc-HCPs. The performance shows no degradation after 5 cycles, indicating its nice stability. This may provide a promising and cost-effective way to harvest water from air only powered by natural sunlight and offer new insights to combine photothermal MOFs with traditional adsorbents to design high-efficiency water generators.
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
PROCESS BIOCHEMISTRY
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2024
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IF 3.7
Hongbo Suo,Xinzheng Liu,Shu Chen,Qi Li,Xiangnan Liu,Lili Xu
Biodiesel is more environmentally friendly compared to traditional petroleum diesel. The method of producing biodiesel catalyzed by lipases, as a green chemistry technology, can further reduce its negative impact on the environment. In this work, lipase immobilized on magnetic cellulose was embedded in Cu(PABA), and then the biocomposite (MCL@Cu(PABA)) was used for biodiesel production. The good biocompatibility and flexible skeleton structure of cellulose can buffer the compression effect on enzyme molecules during the formation of Metal-Organic Frameworks (MOFs), and the MOFs protective layer can reduce the damage caused by denaturants to enzyme molecules. The biocatalyst showed enhanced activity and stability with a lower deactivation constant ( K d ). Under the optimized reaction conditions, the biodiesel yield can reach 78.4 %. After reused for 7 times, the biocatalyst can still achieve a biodiesel yield of 58.8 %. Moreover, after stored for 30 days, the biodiesel yield can still reach 70.3 %. For all experimental yields, the standard deviation (SD) ranged from 2.4 % to 4.5 %. Secondary structure analysis showed that the rigid structure and active conformation of lipase was enhanced after Cu(PABA) encapsulation.
研究领域:
生物化学
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环境科学
✓ 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）