JOURNAL OF ALLOYS AND COMPOUNDS
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2021
·
IF 5.316
Xiang Li,Chuang Huang,Zilong Wang,Zhen Xiang,Wei Lu
Metal-organic frameworks (MOFs) derived carbon-based magnetic metal materials had attracted much attention in the field of electromagnetic wave absorbers. In this work, a layered FeCo@C nanocomposites was successfully synthesized by annealing FeCo-MOFs. The pyrolytic temperatures had influenced the graphitization degree of the carbon frameworks and the magnetic properties of the FeCo nanoparticles . Owing to the outstanding attenuation capacity, impedance matching and unique layered structure, FeCo@C nanocomposites displayed an excellent electromagnetic wave absorption performance with the strongest reflection loss ( RL ) value could reach to −53.6 dB at 12.8 GHz and the effective bandwidth ( RL <−10 dB) could reach 6 GHz (10.4–16.4 GHz) at the thickness of 2.5 mm with the filler loading was only 15 wt%. Therefore, the layered FeCo@C nanocomposites could be a potential high-efficiency electromagnetic wave absorption material with lightweight, wide effective absorption bandwidth, and strong absorption characteristics.
研究领域:
材料科学
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纳米科技
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电磁学
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功能材料
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复合材料工程
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Qianqiao Wang,Lan Wang,Shuya Zhang,Zhuo Chen,Wenchao Peng,Yang Li,Xiaobin Fan
Zinc-air batteries, as one of the emerging areas of interest in the quest for sustainable energy solutions, are hampered by the intrinsically sluggish kinetics of the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), and still suffer from the issues of low energy density. Herein, we report a MOF-on-MOF-derived electrocatalyst, FeCo@NC-II, designed to efficiently catalyze both ORR ( E half = 0.907 V) and OER ( E j=10 = 1.551 V) within alkaline environments, surpassing esteemed noble metal benchmarks (Pt/C and RuO 2 ). Systematically characterizations and density functional theory (DFT) calculations reveal that the synergistic effect of iron and cobalt bimetallic and the optimized distribution of nitrogen configuration improved the charge distribution of the catalysts, which in turn optimized the adsorption / desorption of oxygenated intermediates accelerating the reaction kinetics. While the unique leaf-like core–shell morphology and excellent pore structure of the FeCo@NC-II catalyst caused the improvement of mass transfer efficiency, electrical conductivity and stability. The core and shell of the precursor constructed through the MOF-on-MOF strategy achieved the effect of 1 + 1 > 2 in mutual cooperation. Further application to zinc-air batteries (ZABs) yielded remarkable power density (212.4 mW/cm 2 ), long cycle (more than 150 h) stability and superior energy density (∼1060 Wh/kg Zn). This work provides a methodology and an idea for the design, synthesis and optimization of advanced bifunctional electrocatalysts.
研究领域:
材料科学
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电化学
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能量存储与转换
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纳米材料
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催化
✓ 已验证
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
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2024
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IF 7.4
Xiao-Hui Shi,Hong Shi,Xue-Lin Li,Shi-Jie Wu,Wei-Min Xie,De-Yi Wang
The integration of layered double metal hydroxides (LDH) into epoxy resin (EP) for flame retardancy is in line with the principles of environmentally friendly and sustainable development. In this study, polydopamine (PDA)-primed intercalated LDH containing iron and cobalt ions (LDH-DBS@PDA) was prepared, and its chemical composition, structure and morphology were thoroughly characterized. Due to the synergistic flame-retardant properties exhibited by LDH and PDA, as well as the catalytic charring properties of iron and cobalt ions in both condensed and gaseous phases, EP composite with 5 wt% LDH-DBS@PDA achieved a UL-94 V-0 rating with a limiting oxygen index of 30.7 %. Moreover, EP/LDH-DBS@PDA exhibited a significant decrease in total heat release by 48 % and smoke release by 52 %, demonstrating remarkable fire safety performance. Additionally, the existence of LDH-DBS@PDA improved impact strength , tensile strength , and glass transition temperature due to strong interactions between PDA and EP matrix. This work presents a promising strategy for developing highly efficiency flame retardants with excellent compatibility for polymeric materials.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Xiaolong Zhu,Wei Lu,Ziyi Li,Jiamu Xiao,Donglin Gan,Xuefeng Jiang,Mingqian Wang
Diseases caused by bacterial infections significantly threaten human health. However, the overuse of conventional antibiotics has led to rising drug resistance, necessitating the development of alternative antimicrobial strategies. In this study, we designed and synthesized a dual single-atom FeC nanozyme supported on nitrogen-doped carbon (NC), incorporating Fe single-atom sites, Co single-atom sites, and Fe-Co dual-atom sites. Characterization and theoretical calculations confirmed that the catalytic performance of FeCo-NC was superior to those of single-atom Fe-NC and Co-NC. Photothermal experiments demonstrated FeCo-NC’s excellent photothermal properties and high photothermal conversion efficiency. Chemodynamic studies revealed its ability to efficiently catalyze H 2 O 2 for generating reactive oxygen species, outperforming Fe-NC and Co-NC in catalytic kinetics. In vitro and in vivo experiments confirmed that FeCo-NC effectively eliminated bacteria against methicillin-resistant Staphylococcus aureus ( MRSA) (99.36 %) and Escherichia coli ( E. coli ) (99.76%) through the synergistic effects of photothermal therapy and chemodynamic therapy. Transcriptome analysis further showed that FeCo-NC altered bacterial gene expression related to growth, metabolism, and membrane structure, enhancing its antibacterial efficacy. Beyond its antimicrobial effects, FeCo-NC reduced inflammation at infected wound sites, promoted macrophage polarization, enhanced collagen deposition, and accelerated wound healing. This study presents a promising antibiotic-free strategy for the clinical treatment of infected wounds.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 12
·3585-3595
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IF 6.1
Haoyu Li,Yawei Xiao,Xu Tian,Xinxin Xing,Minhua Cao,Yude Wang
Electrochemical water splitting is crucial for sustainable energy and environmental conservation, meeting global energy needs while addressing environmental concerns. However, unlocking its potential requires addressing substantial technical and scientific challenges. Crystalline/amorphous composite catalysts represent a significant advancement in water-splitting research, with unique structural compositions and tailored properties that outperform conventional catalysts, thereby enhancing the efficiency and performance in essential aspects. In this study, crystalline/amorphous-structured FeCo alloy/FeCoNi-Pi (phosphate) was synthesized through one-step electrodeposition on Ni foam (NF). While FeCo alloy demonstrates excellent conductivity, the incorporation of FeCoNi-Pi enhances active site availability, improves hydrophilicity, and optimizes electrocatalytic reaction kinetics. Consequently, crystalline/amorphous FeCo alloy/FeCoNi-Pi required significantly lower overpotentials of 77/233 mV for the hydrogen/oxygen evolution reaction (HER/OER) compared to the FeCo alloy to acquire 10 mA cm−2 current density in an alkaline environment. A complete cell comprised of crystalline/amorphous FeCo alloy/FeCoNi-Pi electrodes exhibits remarkable long-term stability and demonstrates a relatively lower voltage of 1.56 and 1.69 V, enabling 10 and 100 mA cm−2 current densities. This crystalline/amorphous composite strategy has been proven effective in designing FeCo alloy-based electrocatalysts to achieve efficient hydrogen production.
研究领域:
材料科学
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能源化学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Keke Liu,Yanan Chen,Xueliang Dong,Yongmei Hu,Haiping Huang
A heterostructured nanocomposite modified electrode was designed as a sensitive and efficient analytical tool for nitrite determination. The nanocomposite constructed from different building blocks was fabricated by ultrasonically growing bimetallic FeCo metal-organic framework (MOF) in the well-dispersed multi-walled carbon nanotubes (MWCNTs) suspensions at room temperature, where the MOF hybrid was extended to uniform thin film structure. Electrochemical experimental results demonstrate that the synergistic contributions from bimetallic active sites, MWCNTs and thin-film morphology endow modified electrode with dramatically enhanced catalytic activity metrics towards nitrite. Significantly, the co-doping of Fe-Co plays key role in improving the electronic conductivity and catalytic capacity of the MOF/MWCNTs composite. Thereinto, the FeCo-MOF/MWCNTs sensor displays excellent detection performance with a wide linear detection range (5∼5000 μM), outstanding selectivity and a detect limitation of 1.68 μM for nitrite. These superior findings provide new potentials application for the inspection of nitrite in environmental monitor.
研究领域:
分析化学
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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
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Hui Shu,Tingrun Lai,Shanli Wang,Mengyao Li,Haoyu Li,Ting Chen,Xuechun Xiao,Yude Wang
Paraquat is a highly toxic herbicide, and its residue in food poses a huge threat to human health. High-sensitivity detection of trace paraquat is crucial but challenging. Herein, we theoretically predicted that FeCo-MOF materials with Fe and Co dual active sites have potential interactions with paraquat. Moreover, a porous FeCo-MOF materials with Fe and Co dual active sites were in-suit constructed on the surface of foam nickel by self-assembly strategy, and used for the electrochemical detection of paraquat. The electrochemical detection results indicate that the prepared FeCo-MOF foam nickel electrode exhibited ultra-high detection sensitivity (113.85 μA nM −1 cm −2 ) and trace detection limit (0.16 nM) in a wide range of paraquat concentration (1.00 nM–5.00 mM). In addition, we successfully used this FeCo-MOF foam nickel electrode for the detection of paraquat in apples, human serum, and fresh tea leaves (detection recovery is 97.00 %–99.99 %). Furthermore, the density functional theory (DFT) and X-ray photoelectron spectroscopy (XPS) confirm that Fe and Co are active sites for detecting paraquat, and the interaction between Fe and Co promotes highly sensitive detection of trace paraquat. Therefore, this work provides strategies and comprehension for designing and modulating active sites at the microscopic level to improve sensitivity for detecting toxic pesticides.
研究领域:
环境科学
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分析化学
·
毒理学
✓ 已验证
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Li Gong,Leben Qiu,Xiaoqian Xing,Jieyun Zhu,Mengzhi Lu,Feier Dong,Yan Yu,Weiting Yu
Selectively reducing nitroaromatics into aromatic amines will not only remove nitroaromatic pollutants in waste effluents to reduce environmental risks, but also yield important feedstocks for chemical industrial manufactures. In this study, a FeCo-co-embedded N-doped Carbon (FeCo-N-C) catalyst with Fe-Co atomic pair has been identified with favorable activity, superior selectivity , excellent reusability, as well as outstanding performance in the treatment of real water. The combined results from theoretical study and experimental tests indicate that the improved catalytic performance of FeCo-N-C is owing to the narrowed band gap and electron delocalization caused by the Fe-Co atomic pair which can improve electron transport in its catalytic reaction. The results of isotope experiments and H* quenching experiments confirm that H 2 O is the source of hydrogen in catalytic reduction of PNP. FeCo-N-C is identified as a superior catalyst to replace multitudinous currently used noble-metal catalysts for the selective catalytic reduction of nitroaromatics in wastewater treatment .
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Yuting He,Xiaoxuan Yang,Yunsong Li,Liting Liu,Shengwu Guo,Chengyong Shu,Feng Liu,Yongning Liu,Qiang Tan,Gang Wu
Single-metal site catalysts have exhibited highly efficient electrocatalytic properties due to their unique coordination environments and adjustable local structures for reactant adsorption and electron transfer. They have been widely studied for many electrochemical reactions, including oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). However, it remains a significant challenge to realize high-efficiency bifunctional catalysis (ORR/OER) with single-metal-type active sites. Herein, we report atomically dispersed Fe–Co dual metal sites (FeCo–NC) derived from Fe and Co co-doped zeolitic imidazolate frameworks (ZIF-8s), aiming to build up multiple active sites for bifunctional ORR/OER catalysts. The atomically dispersed FeCo–NC catalyst shows excellent bifunctional catalytic activity in alkaline media for the ORR (E1/2 = 0.877 V) and the OER (Ej=10 = 1.579 V). Moreover, its outstanding stability during the ORR and the OER is comparable to noble-metal catalysts (Pt/C and RuO2). The atomic dispersion state, coordination structure, and the charge density difference of the dual metal site FeCo–NC were characterized and determined using advanced physical characterization and density functional theory (DFT) calculations. The FeCo–N6 moieties are likely the main active sites simultaneously for the ORR and the OER with improved performance relative to the traditional single Fe and Co site catalysts. We further incorporated the FeCo–NC catalyst into an air electrode for fabricating rechargeable and flexible Zn–air batteries, generating a superior power density (372 mW cm–2) and long-cycle (over 190 h) stability. This work would provide a method to design and synthesize atomically dispersed multi-metal site catalysts for advanced electrocatalysis.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yu He,Mengyao Zhao,Xiang Li,Weiliang Xiong,Guosheng Shao,Peng Zhang,Yige Zhao
Two-dimensional van der Waals heterojunctions (2D vdWHs) have garnered significant interest owing to their ability of efficiently interfacial electron transfer, tunable band structures, and high structural stability. Nevertheless, the utilization of 2D vdWHs as multifunctional electrocatalysts is still rarely explored. In this work, we synthesized a 30% FeCo LDH/TiN/NC electrocatalyst via high-temperature solid-state and hydrothermal methods, featuring a 2D vdWH architecture in which FeCo LDH nanosheets are uniformly anchored onto the TiN/NC substrate. The resulting electrocatalyst exhibits remarkable trifunctional activity and stability for the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER), comparable to those of commercial catalysts. The superior electrocatalytic performance is attributed to the interfacial electron redistribution, in which the electron transfer from TiN/NC to FeCo LDH enhances charge transfer kinetics and increases the number of active sites during electrochemical reactions. Moreover, the 30% FeCo LDH/TiN/NC electrocatalyst shows great promise for applications in both zinc-air batteries (ZABs) and overall water splitting. This study underscores the potential of 2D vdWHs and offers valuable insights for the design of advanced multifunctional electrocatalysts.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能量存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2025
·
IF 5.1
Li Li,Jianjian Zhao,Zhengbo Chen
The content of antioxidants in food is related to the dietary safety of consumers. In this context, two dimensional (2D) iron/cobalt metal nanosheets (Fe/Co NSs) are synthesized through the synergistic self-assembly reaction of Fe3+/Co2+ with terephthalic acid. This Fe/Co NSs exhibit excellent peroxidase-like activities. Based on nanozyme property of Fe/Co NSs, three-channel sensor array based on Fe/Co NSs nanozyme is constructed using 3,3',5,5'-tetramethylbenzidine (TMB) as colorimetric substrate and three wavelengths (370, 456, and 654 nm) as array’s channels, enabling distinct absorbance response signals for the identification of five antioxidants with a 100% accuracy. The sensor array is able to accurately detect the five antioxidants in the range of 100 nM-100 μM, achieving accurate quantitative analysis. The sensor array also has excellent anti-interference ability to other interferents even at high concentration. These abilities endow the sensor array with great potentials for discrimination of blind and actual antioxidant samples.
研究领域:
食品安全
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纳米技术
·
生物传感器
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Jian Ye,Zhaoxiang Ling,Chuang Li,Mingyang Dai,Qiang Chen,Yanling Gu,Chunping Yang
Micro-nanobubbles (MNBs), as an emerging environmental-friendly technology, have shown great potential in enhancing advanced oxidation processes for water treatment. This study innovatively integrated MNBs with a biochar-supported cobalt-iron catalyst (CoFe/BC) and persulfate (PDS) system, creating a novel synergistic approach for tetracycline (TC) degradation. The CoFe/BC+PDS+MNB system achieved 95.63% TC degradation efficiency under optimized conditions (50 mg/L catalyst, 30 mg/L TC, 400 mg/L PDS), outperforming the conventional system with half the catalyst. While CO 3 2- and HCO 3 - inhibited TC degradation, NO 3 - , H 2 PO 4 - , and humic acid showed minimal interference. Mechanistic studies revealed that singlet oxygen ( 1 O 2 ), sulfate radicals (SO 4 •- ), and hydroxyl radicals (•OH) were the primary reactive species. MNBs facilitated electron transfer between dissolved oxygen (DO) and CoFe/BC, while bubble collapse generated localized •OH hotspots. Electrostatic attraction between MNBs and CoFe/BC under acidic conditions (pH 3-6.2) improved DO conversion efficiency, while MNB stability at neutral-alkaline pH ensured sustained degradation (>91% at pH 7-9). Despite pH sensitivity, the synergistic effect maintained efficient degradation across a broad pH range. This study demonstrates the potential of MNBs integration in persulfate-based advanced oxidation processes for water treatment applications.
研究领域:
环境科学
·
化学工程
✓ 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）