ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Baoting Dou,Hui Zhou,Xiguang Han,Po Wang
The dissociation of the walking strand from the track gives rise to decreased efficiency and long reaction time of DNA walkers. In this work, we constructed a DNA walker combining the introduction of a wedge segment with a bimetallic metal–organic framework (MOF) electrocatalyst to solve this problem. The target methylated DNA acted as a single-legged walker, and the immobilization probe assembled on the track contained a wedge segment that was complementary to the target methylated DNA persistently, inhibiting its dissociation from the track. The fuel strand modified with a bimetallic MOF would drive the target strand to conduct branch migration and move processively along the track. The stepwise movement of the target strand resulted in the loading of numerous bimetallic MOF catalysts to reduce H2O2 at the electrode interface, thereby a significantly increased current response would be obtained for the detection of methylated DNA. This DNA walker achieved a detection limit of 200 aM within 20 min and effectively distinguished DNA with different methylation statuses, which would pave a way for rapid and sensitive monitoring of DNA methylation.
研究领域:
生物化学
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分析化学
·
分子生物学
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2024
·
IF 4.4
Wei Li,Jingyun Wang,Mengmeng Han,Shanshan Xu
Obtaining pure clean energy methane (CH 4 , 3.80 Å) from natural gas is a great challenge task at present due to the similar kinetic diameter with nitrogen (N 2 , 3.64 Å). Herein, a well-defined rod-like bimetallic MOF (Cu 0.5 Ca 0.5 -SBMOF) with an excellent adsorption performance for CH 4 was successfully prepared and blended as filler with Matrimid® 5218 (PI) for preparing mixed matrix membranes (Cu 0.5 Ca 0.5 -SBMOF@PI MMMs). In the separation experiment of N 2 /CH 4 binary gas mixture, both filler loadings and trans -membrane pressure have significant effects on the separation performance of MMMs. When the filler loading is 20 wt%, Cu 0.5 Ca 0.5 -SBMOF@PI MMMs exhibits an excellent separation performance with a separation factor of CH 4 /N 2 up to 17.03, and the permeability of 22.57 barrer for N 2 , which significantly preceded the most reported MMMs. Moreover, the prepared MMMs also show excellent stability. This work has taken an important step towards practical application in the field of separating N 2 /CH 4 gas mixture using MMMs method.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Fang Ren,Lin Ma,Chunjie Li,Tong Wu,Jiale Zhang,Lu Pei,Yanling Jin,Zhenfeng Sun,Zhengzheng Guo,Ping Song,Penggang Ren
Metal−organic framework (MOF)-derived magnetic porous carbon not only have excellent magnetic loss, but also can construct various nanostructures through appropriate design to enhance electromagnetic waves (EMWs) absorption. Herein, magnetic porous carbon (Co/Ni@C) derived from rod-shaped Co/Ni-MOFs was selected as magnetic components and MXene was regarded as conductive materials to construct the three-dimensional porous Co/Ni@C/MXene/cellulose-derived carbon foams via a simple solution mixing-regeneration, freeze-drying process and a facile pyrolysis strategy. Due to the electric/magnetic coupling loss and the interfacial polarization loss caused by multi-interface architecture, the synthesized carbon foam achieves an absorption coefficient of 0.54 and a high EMI SE of 70.4 dB, which enhances the electromagnetic shielding performance without damaging the high absorption coefficient. This work provides a basis for the preparation of electromagnetic shielding composite materials with multi-interface structures to achieve efficient EMI SE and superior absorption coefficients.
研究领域:
材料科学
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电磁学
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DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2022
·Vol. 26
·期 10
·2301-2313
·
IF 2.747
Liu Yunfei,Dong Shanghai,Wang Liying,Chen Guohua,Hou Yaping,Cao Zhenzhu,Zhang Yongfeng
The purplish-red rod-like crystal structure of novel bimetallic metal–organic-frameworks (MOF) {CoZn[(4,4′-BDA)(Phen)] 2 } n has been obtained by the reaction of Co 2+ , Zn 2+ (the molar ratio Co: Zn = 1:1), 1,10-phenanthroline (Phen) and 4, 4′-biphenyldicarboxylic acid (4,4′-H 2 BDA), in which Zn ions of the previously reported monometallic MOF {[Zn(4,4′-BDA)(Phen)] 2 ·(HCON(CH 3 ) 2 } n are partly substituted by Co ions. The crystal structure of {CoZn[(4,4′-BDA)(Phen)] 2 } n has been characterized by IR, X-ray photoelectron spectroscopy (XPS), and single-crystal X-ray diffraction analysis. Then, the precursors CoZn-MOF-B@C were obtained by adding a surfactant, activated carbon, and NaOH. Its derivative ZnO/CoO@C was used as anode material for lithium-ion batteries, which showed good lithium storage performance. The initial discharge specific capacity of ZnO/CoO@C is 1437.9 mAh g −1 at a current density of 0.2 A g −1 , and after 100 cycles, the specific capacity drops to 741.8 mAh g −1 .
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 2
·1-11
·
IF 5.3
Tang Jiazhen,Chen Jiawei,Xu Ruijie,Xu Junhui,Peng Xiaolun,Wang Yazhen
An electrochemical sensor is presented for the detection of the chloramphenicol (CAP) based on a bimetallic MIL-101(Fe/Co) MOF electrocatalyst. The MIL-101(Fe/Co) was prepared by utilizing mixed-valence Fe (III) and Co (II) as metal nodes and terephthalic acid as ligands with a simple hydrothermal method and characterized by SEM, TEM, XRD, FTIR, and XPS. Electrochemical measurements such as electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and differential pulse voltammetry (DPV) showed that bimetallic MIL-101(Fe/Co) had the faster electron transfer, larger electroactive area, and higher electrocatalytic activity compared with their monometallic counterparts due to the strong synergistic effect between bimetals. Inspired by these results, the MIL-101(Fe/Co)-based sensor was used to detect CAP. Some experiment parameters of pH, Fe and Co molar ratio, MIL-101(Fe/Co) volume, and DPV quiet time were optimized. The direct reduction mechanism of CAP was verified to involve four electrons and four protons process. Finally, the sensitive and selective CAP detection in the concentration range 1 to 200 μM with a detection limit of 0.3 μM was realized by the proposed sensor. The satisfactory recoveries in tap water and lake water indicated the practicability of the proposed electrochemical sensor. It is expected that this work may open up a paradigm for the preparation of MOF-based electrode modifiers with desired electrocatalytic performance for environmental pollution monitoring.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Fuyu Chen,Zhongjie Wang,Xuhong Yin,Xiangdong Cheng,Qiang He,Hui Chen,Qinfang Zhang
The vanadium flow battery (VFB) has garnered significant attention for its potential to enable cost-effective utilization in large-scale energy storage. Nevertheless, the electrochemical activity of electrodes is limited during vanadium redox reactions, which poses a challenge to achieving high-performance VFBs. To address this, we synthesize a catalyst consisting of amorphous carbon, manganese oxide, and cobalt, to enhance VFB performance. Initially, bimetallic metal-organic frameworks with varying Mn Co ratios are synthesized using a hydrothermal method. Subsequently, the bimetallic metal-organic frameworks are carbonized to form the catalysts. The morphology, composition, electrocatalytic activity, and charging-discharging behavior of the prepared catalysts are then systematically investigated. This paper reveals that: i) the composite with a molar ratio of manganese to cobalt of 1:4, exhibits a uniform and fine particle distribution, an abundance of oxygen-containing functional groups, and exceptional electrochemical activities; ii) it enhances the energy efficiency of VFBs by 9 % compared to those utilizing raw carbon felts and by 5 % over those with mono-MnO@C or mono-Co@C electrodes at 100 mA cm −2 ; iii) it offers significant improvements in terms of operating voltages, cell capacities, high current density characteristics, and lifespan. Consequently, this work introduces a novel electrochemical catalyst for VFBs, enhancing their performance and broadening their potential applications.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 5
·811
·
IF 5.719
Kang-Ping Cui,Yu-Ying He,Kai-Jie Xu,Yu Zhang,Chang-Bin Chen,Zheng-Jiang Xu,Xing Chen
In this work, the combination of high surface area diatomite with Fe and Cu bimetallic MOF material catalysts (Fe0.25Cu0.75(BDC)@DE) were synthesized by traditional solvothermal method, and exhibited efficient degradation performance to tetracycline hydrochloride (TC). The degradation results showed: Within 120 min, about 93% of TC was degraded under the optimal conditions. From the physical–chemical characterization, it can be seen that Fe and Cu play crucial roles in the reduction of Fe3+because of their synergistic effect. The synergistic effect can not only increase the generation of hydroxyl radicals (•OH), but also improve the degradation efficiency of TC. The Lewis acid property of Cu achieved the pH range of reaction system has been expanded, and it made the material degrade well under both neutral and acidic conditions. Loading into diatomite can reduce agglomeration and metal ion leaching, thus the novel catalysts exhibited low metal ion leaching. This catalyst has good structural stability, and less loss of performance after five reaction cycles, and the degradation efficiency of the material still reached 81.8%. High performance liquid chromatography–mass spectrometry was used to analyze the degradation intermediates of TC, it provided a deep insight of the mechanism and degradation pathway of TC by bimetallic MOFs. This allows us to gain a deeper understanding of the catalytic mechanism and degradation pathway of TC degradation by bimetallic MOFS catalysts. This work has not only achieved important progress in developing high-performance catalysts for TC degradation, but has also provided useful information for the development of MOF-based catalysts for rapid environmental remediation.Keywords:Fenton-like catalyst;bimetallic MOF;diatomite;synergistic effect;antibiotics
研究领域:
环境科学
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催化
·
材料科学
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DOI
PubMed
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 38
·26528-26543
·
IF 3.9
Asma Zaka,Muhammad Waqas Iqbal,Amir Muhammad Afzal,Haseebul Hassan,Hira Rafique,Saikh Mohammad Wabaidur,Ahmed M. Tawfeek,Eshan Elahi
In this work, a novel bimetallic Fe–Mg/MOF was synthesized through a cost-effective and rapid hydrothermal process. The structure, morphology, and composition were examined using X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy. Further, the Brunauer–Emmett–Teller (BET) measurement showed a 324 m2 g−1 surface area for Fe–Mg/MOF. The Fe–Mg/MOF achieved 1825 C g−1 capacity at 1.2 A g−1 current density, which is higher than simple Fe-MOF (1144 C g−1) and Mg-MOF (1401 C g−1). To assess the long-term stability of the asymmetric device, the bimetallic MOF supercapattery underwent 1000 charge/discharge cycles and retained 85% of its initial capacity. The energy and power densities were calculated to be 57 W h kg−1 and 2393 W kg−1, respectively. Additionally, Fe–Mg/MOF showed superior electrocatalytic performance in hydrogen evolution reaction (HER) by demonstrating a smaller Tafel slope of 51.43 mV dec−1. Our research lays the foundation for enhancing the efficiency of energy storage technologies, paving the way for more sustainable and robust energy solutions.
研究领域:
材料科学
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电化学
·
能源技术
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 44
·20279-20285
·
IF 3.3
Xiaoqian Peng,Jing Zhang,Xu Zhang,Xiaochan Liu,Zhiqiang Huang,Haibo Li,Xibin Yi
Hydrogen is regarded as one of the most promising energy sources of the future, due to its low-cost, zero-pollution, and high-heat value. Nevertheless, traditional methods of storing hydrogen are commonly accompanied by the risk of leaks and explosions, so how to store and transport hydrogen safely and efficiently is a critical issue that needs to be addressed. Solid-state hydrogen storage is the most attractive way to store hydrogen in nanomaterials by chemical or physical adsorption, which has the advantages of high energy density and good safety. Here, a rational Ni–Zn bimetallic MOF has been constructed by a straightforward synthetic technique, in which the Zn atom was partially replaced by the Ni atom. The micropore rate of the Ni–Zn bimetallic MOFs is higher than that of ZIF-8. In addition, the presence of Ni provides more unsaturated metal sites and strengthens the bonding between hydrogen molecules and Ni, effectively improving the hydrogen storage capacity of Ni–Zn bimetallic MOFs. The experimental results show that the hydrogen adsorption capacity of Ni–Zn bimetallic MOFs can reach 1.35 wt% at 77 K and 1 bar.
研究领域:
材料科学
·
能源存储
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Zhijie Zhou,Yanting Gao,Wei Xia,Wenbo Shi,Yizhou Liu,Fang Zheng,Zhiguo Zhang,Qiwei Yang,Qilong Ren,Zongbi Bao
The development of advanced adsorbents for methane (CH4) and nitrogen (N2) separation is critical for the efficient utilization of coal-bed methane (CBM), which is a key alternative energy resource. Herein, we report a bimetallic copper–indium-based metal–organic framework (MOF), CuIn(3-ain)4, featuring high-density nitrogen and oxygen sites distributed along its pore surface. These negatively charged atom sites, derived from CuN4 and InO8 clusters, form multiple hydrogen-bonding interactions with CH4, significantly enhancing its adsorption affinity. CuIn(3-ain)4 demonstrates a high CH4 uptake of 1.56 mmol g–1 and excellent CH4/N2 selectivity under ambient conditions, outperforming many reported materials. Dynamic breakthrough experiments confirm that over 90% purity methane can be obtained in a single adsorption–desorption cycle. Grand Canonical Monte Carlo (GCMC) simulations and density functional theory (DFT) calculations reveal that the nitrogen and oxygen sites play a crucial role in selectively recognizing CH4 over N2, leading to a superior separation efficiency. Moreover, the material exhibits excellent cyclic stability and scalability, making CuIn(3-ain)4 a promising candidate for practical CH4/N2 separation in CBM purification. This study provides valuable insights into the design of MOFs for challenging gas separations, emphasizing the role of polar sites in facilitating selective adsorption.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Xiaoran Liu,Zhiqiang Wang,Weiwei Men,Xiao Wu,Wenhong Zhang,Jue Cheng,Junying Zhang,Feng Gao,Kun Li
The design and fabrication of electromagnetic wave (EMW) absorption materials with great wave-absorbing performance and excellent self-healing properties was significant. However, research on the interface effect, the three-dimensional conductive interconnection network, and the synergistic effect between EMW absorption performance and self-healing properties remained challenging. Herein, the synthetic strategy of in situ growth and multidynamic to cross-linking was raised to synthesize the polyurethane (PU)/bimetallic metal–organic framework (MOF)-derived composites (Pxy-CoNiNC@rGox%). The bimetallic MOF-derived moiety was constructed by multiple heterogeneous interfaces/porous structures/N-doped carbon nanotubes (NCNTs)/reduced graphene oxide (rGo), which synergistically improved the electromagnetic balance, multiple losses, and scattering, resulting in the excellent EMW absorption performance. As a result, the P33-CoNiNC@rGO14% composite showed satisfying EMW absorption properties with the minimum reflection loss (RLmin) of −55.65 dB at 9.05 GHz, and the effective absorption bandwidth (EAB10) of 4.22 GHz at 1.8 mm thickness. N-doped nanoparticles formed interfacial hydrogen bond interactions with polyurethane to construct a functional nanofiller-flexible polymer interface, which ultimately improved the compatibility. P33-CoNiNC@rGO14% exhibited a high tensile strength (16.30 MPa) and fracture strain (123.51%). Simultaneously, the high reversibility of boroxines and hydrogen bonds endowed P33-CoNiNC@rGO14% with efficient healing at 85 °C and recycling at 30 °C in ethanol or ethanol/DMF mixture, while the composites could be restored to their original mechanical strength essentially after recycling. Our strategy provided a thread for the synthesis of EMW absorption composites with self-healing performance.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
Energy Advances
·
2024
·
IF 3.2
Kunpeng Liu,Xu Wang,Nan Wang,Ruiyong Zhang,Meinan Yang,Baorong Hou,Wolfgang Sand
Rationally designing high-efficiency catalysts for electrochemical two-electron water oxidation reaction (2e− WOR) to produce hydrogen peroxide (H2O2) is extremely important, while designing bimetallic metal–organic frameworks (MOFs) is of great significance for effective 2e− WOR. Herein, MIL-53(Fe) and different proportions of Co-doped MIL-53(Fe) were prepared by a hydrothermal method. The structural characterization and elemental analysis showed that the Co ions were successfully doped into MIL-53(Fe) to form a MIL-53(Fe/Co) bimetallic MOF, and the morphology of MIL-53(Fe/Co) became more regular after Co doping. We found that the optimized MIL-53(Fe/Co) exhibits remarkable 2e− WOR performance, which gave an overpotential of 150 mV at 1 mA cm−2. The overpotential of MIL-53(Fe/Co) was approximately 220 mV (at 1 mA cm−2) lower than that of MIL-53(Fe), which may be attributed to the change of microstructure of MIL-53(Fe) after Co doping and the synergistic effect between Fe/Co. Our work introduces a strategy for designing bimetallic MOF-based electrocatalysts, opening up new possibilities for efficient 2e− WOR systems.
研究领域:
材料科学
·
电催化
·
能源化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）