MOLECULES
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2023
·Vol. 28
·期 23
·7894
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IF 4.6
Jia-Bin Xiong,Yong-Juan Zhou,Shi-Hui Wang,Zhang-Qi Xiong,Zi-Kun Zhang,Shan-Shan Zhang,Chen-Kunlun Zhang,Chao-Fan Xu,Guo-Qun Liu
MOF (metal organic framework) materials have been used as functional materials in a number of fields due to their diverse spatial tunability, which produces rich porous structures with stable and continuous pores and a high specific surface area. A triboelectric nanogenerator can convert trace mechanical energy into electrical energy, and the application of MOF materials to triboelectric nanogenerators has been intensively studied. In this work, we report on two MOFs with similar spatial structures, and the modulation of the end microstructures was achieved using the difference in F content. The output performance of friction power generation increases with the increase in F content, and the obtained polyacidic ligand materials can be used to construct self-powered corrosion protection systems, which can effectively protect metallic materials from corrosion.Keywords:TENG;MOF;corrosion protection;cathodic protection
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高影响因子
ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Huali Li,Shuwen Luo,Liuqin Zhang,Zilong Zhao,Min Wu,Weihua Li,Fa-Qian Liu
Marine biofouling is one of the technical bottlenecks restricting the development of the global marine economy. Among the commercial self-polishing antifouling coatings, cuprous oxide is an irreplaceable component because of its efficiency and broad-spectrum antibacterial activity. However, one of the biggest obstacles to achieving long-term antifouling is the “initial burst and final decay” of cuprous oxide in the coating. Here, we lock the copper ions by establishing an antifouling unit composed of Cu2O (core) and Cu-based metal–organic framework (Cu-MOF, shell). Cu-MOF is densely grown in situ on the periphery of Cu2O by acid proton etching. The shell structure of Cu-MOF can effectively improve the stability of the internal Cu2O and thus achieve the stable and slow release of copper ions. Furthermore, Cu2O@Cu-MOF nanocapsules can also achieve active defense by rapid and complete dissolution of Cu2O@Cu-MOF at local acidic microenvironment (pH ≤ 5) where the adhesion of fouling organisms occurs. Super-resolution fluorescence microscopy is used to explain the sterilization mechanism. Relying on the water- and acid-sensitive properties of Cu-MOF shell, the stable, controlled and efficient release of copper ions has been achieved for the Cu2O@Cu-MOF nanocapsules in the self-polishing antifouling coatings. Thus, these controlled-release nanocapsules make long-term antifouling promising.
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ACS Applied Materials & Interfaces
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2020
·
IF 8.758
Xiangyu Bi,Yong’an Zhang,Feng Zhang,Shenxiang Zhang,Zhenggong Wang,Jian Jin
In the mixed matrix membrane (MMM), the interface between the filler and the polymer matrix will directly affect the gas separation performance of the membranes. Reasonable interfacial design in MMMs is thus important and necessary. In this work, metal–organic coordination interaction is used to construct the interface in metal–organic framework (MOF) nanosheet-based polyimide MMMs where ultrathin Co-benzenedicarboxylate MOF nanosheets (CBMNs) with a thickness less than 5 nm and a lateral size more than 5 μm are synthesized as fillers and a carboxyl-functionalized polyimide (6FDA-durene-DABA) is used as a polymer matrix. Because of the high aspect ratio (>1000) of CBMNs, abundant metal–organic coordination bonds are formed between Co2+ in CBMNs and the −COOH group in 6FDA-durene-DABA. As a result, the 6FDA-durene-DABA/CBMN MMMs exhibit improved separation performance for the CO2/CH4 and H2/CH4 gas pairs with H2/CH4 and CO2/CH4 selectivities up to 42.0 ± 4.0 and 33.6 ± 3.0, respectively. The enhanced interfacial interaction leads to the comprehensive separation performance of CO2/CH4 and H2/CH4 gas pairs approaching or surpassing the 2008 Robeson upper bound. In addition, the CO2 plasticization pressure of the MMMs is significantly enhanced up to ∼20 bar, which is 2 times that of the pure 6FDA-durene-DABA membrane. When separating a mixed gas of CO2/CH4, the selectivity of CO2/CH4 remains stable at around 23 and the CO2 permeability keeps around 400 barrer during the long-term test.
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STAR Protocols
·
2022
·
IF 0
Ziman Chen,Yahui Zhang,Qingmei Song,Liang Ma,Yongqin Lv
Summary Mixed-matrix membranes (MMMs) comprising polymer matrices and metal-organic frameworks (MOFs) provide efficient and economic CO 2 separation. One major challenge is to construct continuous and defect-free MMMs due to poor MOF/polymer compatibility. Here, this protocol describes the step-by-step details for synthesis of desired linkers that allow the fabrication of new polymerizable MOFs containing vinyl groups (BUCT MOFs) and the preparation procedures of defect-free MMMs with enhanced MOF/polymer interfacial adhesion and boosted gas separation performances. For complete details on the use and execution of this profile, please refer to Chen et al. (2021) .
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Materials Advances
·
2021
·Vol. 2
·期 12
·3871-3880
·
IF 0
Xueliang Mu,Yukun Zhong,Teng Jiang,U Kei Cheang
Magnetically driven mobile micro/nanorobots have a significant influence on the application and development of intelligent targeted drug delivery. However, the potential risk of biological toxicity is one of the major problems in drug-loaded micro/nanorobot fabrication. Therefore, there is an urgent need to combine the features (high cargo-loading, low biotoxicity, and good biodegradability) of metal–organic frameworks (MOFs) with micro/nanorobot mobility. In this paper, the concept of green chemical synthesis is used to prepare mass-manufactured biodegradable MOF-based microrobots with low biotoxicity and high drug loading for the targeted treatment of cancer cells. Based on the solvation principle of the binary solvent system, the two-component solvent will be mixed with aprotic polar solvents (X = DMAC, DMF, DMSO, NMP) and proton polar solvents (MeOH) to reduce original aprotic polar solvent toxicity. This can adjust the electrophilicity and polarity of the solution environment, change the configuration of organic ligands, and directly affect the nucleation and growth of MOF crystallites. The results show that five different MOF crystal structures can be synthesized on the surface of microrobots. The MOFs synthesized in a DMAC/MeOH solvent system have cubic structures with good biocompatibility and drug delivery properties. Furthermore, the magnetically actuated motion of MOF-based microrobots with different geometries was systematically tested to obtain the best swimming performance. Subsequently, the microrobots were guided through vascular-like microfluidic channels and can be precisely controlled. Thus, this establishes a foundation to create mass-manufactured microrobotic systems that provide a new direction for small-scale medical robots with low toxicity, high drug loading capacity, biodegradability, and precise motion control.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Haiguang Gao,Rui Shi,Yuting Shao,Yana Liu,Yunfeng Zhu,Jiguang Zhang,Liquan Li
Herein, a novel flower-like Ni MOF with good thermostability is introduced into MgH 2 for the first time, and which demonstrates excellent catalytic activity on improving hydrogen storage performance of MgH 2 . The peak dehydrogenation temperature of MgH 2 -5 wt.% Ni MOF is 78 °C lower than that of pure MgH 2 . Besides, MgH 2 -5 wt.% Ni MOF shows faster de/hydrogenation kinetics, releasing 6.4 wt% hydrogen at 300 °C within 600 s and restoring about 5.7 wt% hydrogen at 150 °C after dehydrogenation. The apparent activation energy for de/hydrogenation reactions are calculated to be 107.8 and 42.8 kJ/mol H 2 respectively, which are much lower than that of MgH 2 doped with other MOFs. In addition, the catalytic mechanism of flower-like Ni MOF is investigated in depth, through XRD , XPS and TEM methods. The high catalytic activity of flower-like Ni MOF can be attributed to the combining effect of in-situ generated Mg 2 Ni/Mg 2 NiH 4 , MgO nanoparticles , amorphous C and remaining layered Ni MOF. This research extends the knowledge of elaborating efficient catalysts via MOFs in hydrogen storage materials.
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高影响因子
CHROMATOGRAPHIA
·
2017
·Vol. 80
·期 3
·463-471
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IF 1.402
Xu Mei,Chen Kun,Luo Chen,Song Guoxin,Hu Yaoming,Cheng Hefa
Abstract In this paper, a simple but efficient method for the extraction and analysis of bifenthrin in water samples was proposed. The Fe 3 O 4 -based nanocomposites (Fe 3 O 4 @m-SiO 2 /PSA@Zr-MOF) were successfully synthesized and developed as adsorbents for magnetic solid-phase extraction. With the solvothermal reaction and sol–gel method, the resultant adsorbents exhibited excellent characteristics of large surface areas, homogeneous pore size, strong magnetic responsivity and high hydrophilicity. The parameters affecting the extraction performance including adsorbent amounts, adsorption time, species of eluents and desorption time were investigated. Under the optimal conditions, validation experiments such as recovery, reproducibility and limits of detection (LOD) were carried out and showed satisfactory results. The LOD of the targeted analytes was found to be 0.5 μg L −1 . The average recovery was 103.2% with the intra-day and inter-day relative standard deviations of 2.0 and 3.5%, respectively. Ultimately, the novel magnetic adsorbents were successfully applied to detect the bifenthrin compound in real water samples. Graphical Abstract
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2019
·
IF 5.04
Zhewen Ma,Jianxin Zou,Darvaish Khan,Wen Zhu,Chuanzhu Hu,Xiaoqin Zeng,Wenjiang Ding
Two kinds of metal-organic frameworks (MOFs) based on Co (II) and Fe (II) as metal ions and trimasic acid (TMA) as organic linker were synthesized. They were used to prepare corresponding MgH 2 -TM MOF (TM = Co, Fe) composites via ball-milling. X-ray diffraction analyses show the formation of Mg 2 Co and α-Fe phases in MgH 2 -TM MOF composites after decomposition. Both of the well dispersed Mg 2 Co and α-Fe nanoparticles exhibit considerable catalytic efficiency in accelerating the sorption kinetics of MgH 2 . The dehydrogenated MgH 2 -Fe MOF composite shows faster hydriding kinetics than the pure MgH 2 and MgH 2 -Co MOF. Meanwhile, the apparent dehydrogenation activation energy ( E d ) of the MgH 2 -Co MOF and MgH 2 -Fe MOF composites are 151.3 ± 9.4 and 142.3 ± 6.5 kJ/mol H 2 , both of which are lower than that of pure MgH 2 (181.4 ± 9.2 kJ/mol H 2 ). The improvement on the sorption kinetics of the MgH 2 -TM MOF powders is mainly attributed to the catalytic effects of nano-sized Mg 2 Co and α-Fe formed on the surface of Mg/MgH 2 particles.
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CHEMICAL ENGINEERING JOURNAL
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2019
·
IF 8.355
Liguo Yue,Xiao Wang,Taotao Sun,Hui Liu,Qi Li,Ning Wu,Hao Guo,Wu Yang
Two-dimensional metal-organic frameworks and nanoflowers of the MoS 2 form a composite structure as an electrode material for high-performance supercapacitor application. MoS 2 expands in the accordion-type Ni-MOF layers, and -S- joins the two materials to form a Ni-MOF coating MoS 2 composite structure. The composite material MoS 2 @Ni-MOF combines the structural characteristics of the Ni-MOF and MoS 2 , and effectively improves the electrochemical performance. The basic skeleton structure of the MoS 2 @Ni-MOF material remains unchanged, showing a remarkable specific capacitance of 1590.24 F·g −1 at a current density of 1.0 A·g −1 and an excellent cycle stability (retention rate of 87.97% after 20,000 cycles at current of 5.0 A·g −1 ). Due to the special composite structure of MoS 2 @Ni-MOF, the as-assembled MoS 2 @Ni-MOF//AC assymmetric supercapacitor (ASC) device exhibits a maximum energy density of 72.93 Wh·kg −1 at a power density of 375 W·Kg −1 . These excellent electrochemical properties indicate that the MoS 2 @Ni-MOF has potential applications in energy storage devices.
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Journal of Materials Chemistry C
·
2025
·
IF 5.1
Hongwei Zhou,Ying Lin,Yongzhen Ma,Zhao Meng,Keyuan Cheng,Haibo Yang
Multi-component design for constructing heterogeneous interfaces has emerged as a key strategy to optimize electromagnetic wave (EMW) absorption. However, precise structural control during heterogeneous interface construction remains a significant challenge. In this study, CNFs@Co/C fibers with tunable cavity size were prepared by coaxial electrospinning and heat treatment. Abundant heterogeneous interfaces between CNFs and metallic Co particles significantly enhance interfacial polarization. The impedance matching of CNFs@Co/C fibers can be effectively tuned by regulating the cavity size. Optimized impedance matching helps more EMWs enter the material and be lost. The results demonstrate that CNFs@Co/C fibers with an appropriate cavity size exhibit outstanding EMW absorption capabilities, attaining a maximum reflection loss of −56.63 dB and an effective absorption bandwidth of 7.84 GHz. Furthermore, the radar stealth performance of the samples was assessed through simulations conducted under far-field conditions. The radar cross section (RCS) value of CNFs@Co/C-2 is less than -10 dB m2 over the entire test range, and the maximum RCS attenuation at θ = 0° could reach 24.09 dB m2. This study provides essential guidance for the development and production of lightweight materials featuring a hollow structure for advanced EMW absorption applications.
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高影响因子
ANALYST
·
2025
·
IF 3.3
Lingling Li,Doudou Lei,Pengyue Song,Qingbin Xu,Lihua Huang,Xiao Ma,Lidong Zhou,Ping Zhang,Weijun Kong
Sensitive detection of carbendazim (CBZ), a widely monitored bactericidal pesticide globally, is critical to reduce risks to human health. In this study, Eu ions were embedded into a rigid metal–organic framework (MOF), to prepare Eu-MOF as a fluorescence signal source, which was subsequently post-modified with polyethyleneimine (PEI) for efficient coupling with anti-CBZ monoclonal antibodies (mAbs). On this basis, a PEI@Eu-MOF-mAbs fluorescent probe-based lateral flow immunosensor (LFIS) was developed for CBZ analysis, enabling dual-mode detection: rapid visual qualitative observation by the naked eye and intelligent fluorescence quantitative analysis by using a smartphone. PEI modification not only effectively improved the zeta potential, fluorescence intensity, quantum yield, and biological coupling ability of the Eu-MOF to mAbs, but also significantly enhanced the stability and anti-interference performance of PEI@Eu-MOF. The introduction of PEI@Eu-MOF-mAbs probes characterized by strong fluorescence emission, long fluorescence lifetime, and low background interference, markedly improved the detection sensitivity of the LFIS platform for trace CBZ. Under optimal conditions, the detection limit for smartphone-assisted fluorescence analysis was as low as 1.3 pg mL−1 with a wide linear detection range of 0.25–125 ng mL−1 for CBZ. The recoveries in spiked Panax notoginseng samples were 93.40–106.0% with RSD <1.69%, indicating outstanding reliability of the newly developed LFIS platform for accurate detection of CBZ. In comparison with seven other common pesticides, CBZ produced significantly weakened and stable fluorescence, indicating good specificity and stability of the developed platform over 4 weeks. Compared with current analytical methods, the smartphone-assisted PEI@Eu-MOF-mAbs dual-modal LFIS platform exhibited advantages of simple construction, easy operation, rapid response, obvious visualization to the naked eye, and intelligent quantitative analysis, highlighting its broad application potential for rapid screening and accurate point-of-care detection of CBZ in a large number of foods and agricultural products.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Bo Ran,Ping Hu,Jun Sun,Jialu Fang,Yan Li,Qihua Sun,Zhizhong Zhang,Zhaofeng Wu,Haiming Duan
This study presents a N 2 H 4 sensing material based on a Ni-MOF@BC heterostructure fabricated via a solvothermal route. The composite shows room-temperature sensing properties with a broad linear detection range and low detection limit. The performance mechanism is governed by a synergistic effect that combines the conductive network of BC for accelerated charge transfer, the catalytic activity of Ni-MOF, a built-in electric field for efficient charge separation, and hierarchically porous channels for enhanced gas permeation. A key structural feature, ligand competition-induced lattice distortion forming η -NiO 6 octahedra, is identified as crucial for the high selectivity toward N 2 H 4 . This unique distortion optimizes the adsorption energy and facilitates orbital hybridization between the sensor and N 2 H 4 molecules, leading to a stronger and more specific interaction. Furthermore, the material features intelligent humidity-responsive mode-switching, enabling dual-purpose detection across varying ambient conditions. By utilizing Lyocell-derived carbon, this work exemplifies a sustainable design strategy for multifunctional sensing materials, offering a promising route toward low-power, adaptive gas monitoring technologies.
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