TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Renjie Ji,Xiaorui Li,Yonghong Liu,Hui Jin,Lixin Wang,Hao Sun,Shuo Liu,Xinlei Wu,Chao Zheng,Runsheng Li,Xiaopeng Li
A superamphiphobic microporous array surface was prepared for the first time by adding diamagnetic MoS₂ particles in the process of magnetic field-assisted jet electrodeposition in this paper. The diamagnetic MoS₂ particles were added to the electrodeposition solution. Then, the edges of MoS₂ provided preferential nucleation and deposition sites, and thus they were codeposited on the substrate surface with Ni²⁺ and Fe²⁺. With a magnetic field, the magnetization effect made the microstructures with the same magnetic pole repel each other and they were connected by the MoS₂ to form micropores. Finally, the superamphiphobic effect was achieved through low surface energy modification. Experiments showed that when the concentration of MoS₂ was 6 g/L and the magnetic field intensity was 50 mT, a Ni-Fe-MoS₂ surface with a longitudinal “olive-shaped” microporous structure could be prepared on the substrate. The contact angles of the deposition layer surface to water and oil were 160.87° and 153.92°. In addition, the surface of the deposition layer had good friction performance. The wear debris generated after friction and wear filled the gaps in the hole structure, which leveled the surface of the deposition layer. Moreover, the wear debris produced rolling friction during friction and wear, reducing the dry friction coefficient of the deposition layer surface to as low as 0.153, and the weight-loss rate after friction and wear was only 0.05 %. This paper provided a method for forming a superamphiphobic microstructure on the surface of the deposition layer under the coupling effect of diamagnetic MoS₂ and a magnetic field, which was of great significance for the efficient and rapid preparation of superamphiphobic surfaces with a low friction coefficient.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 14
·145601
·
IF 3.551
Rui Li,Xinyan Li,Ping-An Yang,Haibo Ruan
High-performance iron nanowires have attracted wide attention from researchers due to their 'controllable' arrangement distribution by magnetic fields. In this paper, a simple magnetic field assisted in situ reduction method was proposed to synthesize Fe NWs with high aspect ratio, small-diameter, and good dispersion. A detailed parametric study determining the relationship among the final morphologies of the products and magnetic field, injection sequence of sodium borohydride that was injected into ferrous sulfate heptahydrate, reactant concentration, and injection rate is presented. The as-synthesized Fe NWs were analyzed by scanning electron microscopy, transmission electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy and vibrating sample magnetometry. A plausible mechanism for the formation of high-aspect-ratio Fe NWs is proposed. The SEM images showed the dependence of the NWs morphology and aspect ratio on synthesis parameters. Magnetic field and injection sequence showed considerable influences on the synthesis of high-aspect-ratio Fe NWs. In the absence of magnetic field or with the changes in injection sequence, only the Fe flakes were obtained. The NWs diameter decreased, and the aspect ratio increased with the increase in injection rate. The FeSO4·7H2O and NaBH4 concentration considerably influenced the aspect ratio of the product, which increased first, decreased, and then increased again with the increase in FeSO4·7H2O concentration. Meanwhile, the product aspect ratio increased and then became saturated with the increase in NaBH4 concentration Thus, an optimum synthesis process was obtained, with the average aspect ratio of 350, and the average diameter of 60 nm. The results reported in this paper provide a basis for optimizing the growth of Fe NWs by magnetic field-assisted method.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SYNTHETIC METALS
·
2018
·
IF 2.526
Jian Liu,Sajid ur Rehman,Jingmin Wang,Zhenbin Fang,Xiang Zhang,Hong Bi
Carbon dots-doped polyaniline nanotubes (CDs@PANI-0.5 T) have been synthesized under an applied magnetic field (MF) of 0.5 T. Not only the applied MF has improved the morphology, crystallinity, and conductivity of PANI nanotubes, but also the doped CDs with large specific surface area increase the electron mobility and electron density of the PANI nanotubes. Which eventually reduce both the charge transfer resistance ( R ct ) and internal resistance ( R s ) of the electrode materials, and thus enhance the supercapacitance behavior of the electrodes. The supercapacitor assembled from CDs@PANI-0.5 T electrodes shows a superior specific capacitance, high energy density, and cycle stability to control samples of PANI-0.5 T, CDs@PANI-0 T, and PANI-0 T.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Fundamental Research
·
2025
·
IF 6.3
Zhong Wang,Tuo Zang,Ye Ziyu,Siyuan Zhang,Guojian Li,Xiaoming Liu,Qiang Wang,Shuang Yuan
Precise anchoring and high-density utilization of platinum single atoms (Pt SA ) remain critical challenges in advancing efficient hydrogen production via water electrolysis. Here, we present an innovative magnetic-field-assisted electrodeposition strategy for the controllable synthesis of high-density Pt SA on two-dimensional MXene substrates. Application of a 0.6 T magnetic field significantly enhanced Pt SA deposition kinetics, yielding a 2.1-fold increase in the deposition rate. Numerical simulations confirmed that magnetohydrodynamic (MHD) effects induced by the magnetic field were the primary mechanism driving this enhanced deposition efficiency. The optimized Pt SA -0.6@MXene/NF catalyst exhibited outstanding hydrogen evolution reaction (HER) performance in 1 M KOH, achieving an ultralow overpotential of 12 mV at 10 mA cm −2 , along with a Tafel slope of 29 mV dec −1 . Notably, the catalyst demonstrated 66.1-fold higher Pt mass activity (3458.7 A g −1 ) compared to commercial Pt/C (52.3 A g −1 ) at a 50 mV overpotential. Density functional theory (DFT) calculations revealed that the high-density Pt SA configuration synergistically enhances MXene's electrical conductivity while lowering the d-band center, thereby optimizing the energy barrier for hydrogen intermediate (H*) adsorption. This work provides a novel strategy for regulating the magnetic-field-assisted deposition of Pt SA catalysts, offering a new avenue for designing high-performance water electrolysis catalysts.
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2025
·
IF 6.1
Jingsi Wang,Shuang Liu,Guibin Lou,Ya Chen,Haozhe Pang,Yachao Song,Syed Mesum Raza Naqvi,Kai Zhou,Zongjun Tian,Muhammad Ali Nasir,Dongsheng Wang,Lida Shen
High infrared emissivity coatings have important engineering value in aerospace and electronic devices. In this study, a new method for preparing high infrared emissivity coatings using magnetic field-assisted jet electrodeposition was prepared. The magnetic field-assisted jet electrodeposition technique can be used to prepare coatings with rough structures, and the infrared emissivity of nickel particle coatings can reach 0.80 at a magnetic field intensity of 100 mT, which is significantly improved compared with the nickel coatings (0.155) prepared by conventional electrodeposition. A nickel-based SiC composite coating with high infrared emissivity was prepared by combining magnetic field-assisted jet electrodeposition with SiC particles. Compared with the nickel particle coating, the infrared emissivity of the nickel-based SiC composite coating is further improved. At a concentration of 6 g/L SiC particles, the infrared emissivity of the nickel-based SiC composite coating reached 0.94. The synergistic effect of magnetic field-assisted jet electrodeposition and SiC particles can realize the nickel coatings into coatings with high infrared emissivity.
研究领域:
材料科学
·
电化学
·
红外技术
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Qian Xu,Yiyan Sun,Zhaoyang Tan,Weijuan Guo,Fujun Li,Xinran Hou,Yu Guo,Feichao Wu
Metal-organic framework (MOF) membranes, particularly cobalt-based gallate (Co-gallate) membranes, possess great potential for the efficient separation of ethylene/ethane (C 2 H 4 /C 2 H 6 ) mixtures due to their excellent sieving properties. However, the poor nucleation of MOF crystals on the substrate poses a challenge in the fabrication of high-quality Co-gallate membranes. In this work, we propose a facile and environmentally friendly approach to prepare continuous Co-gallate membranes at room temperature via magnetic field assistance. The external magnetic field, perpendicular to the substrate surface, promotes directional ion movement, improves the coordination ability of metal centers, and promotes deprotonation of ligands. These collectively facilitate the crystallization and growth of MOF crystals on the substrate by advancing MOF nucleation and enhancing nucleation density. The controllable growth of MOF membranes can also be achieved under the influence of magnetic field. The obtained Co-gallate membrane has a thickness of merely 400 nm, and exhibits superior performance in C 2 H 4 /C 2 H 6 separation. This work highlights the considerable potential of magnetic fields in the fabrication of various MOF membranes for diverse applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhiguang Sun,Yebing Tian,Zenghua Fan,Cheng Qian,Zhen Ma,Ling Li,Honglin Yu,Jiang Guo
Zirconia ceramic components have great applications in the fields of medical, aerospace, and energy. Stereolithographic (SLA) 3D printing technology is widely employed for zirconia ceramic fabrication. However, the surface quality of manufactured components by direct SLA 3D printing is hard to meet stringent requirements of industrial application. In this work, an enhanced alternating-magnetic field-assisted finishing (A-MFAF) method was proposed for SLA printed zirconia ceramics. The A-MFAF was achieved using a flexible alternating-magnetic-field generator, integrating a rectangular magnetic pole and radial magnetic column. The novel finishing tool was fabricated to regulate finishing media behaviors for ensuring desirable finishing force. The unique construction of the magnetic field generator provided a controllable alternating magnetic field in the finishing zone. The magnetic control characteristics were investigated with finite element analysis (FEA). A serial of finishing experiments were carried out to verify the feasibility of the proposed A-MFAF method for SLA printed zirconia ceramics. The finishing efficiency with the developed magnetorheological shear thickening finishing (MSTF) media was improved by over 24% compared to that with the conventional magnetorheological finishing (MRF) fluids. The variation of surface roughness was qualitatively evaluated under different finishing conditions. The surface roughness of 89 nm was obtained from the initial 1.79 μm at 0.6 mm working gap and 700 r/min spindle rotational speed. Digital microscope, optical profiler and surface hydrophobicity measuring instrument were employed to investigate the surface characteristics of the finished SLA printed zirconia ceramics. Ultra-smooth surface with slight defects and deformations was obtained. The feasibility of A-MFAF method for the ultra-precision finishing of SLA printed zirconia ceramics was verified.
研究领域:
材料科学
·
机械工程
·
精密加工技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2023
·
IF 4.3
Hyok-Chol Ri,Chol-San Jon,Liu Lu,Xiangfan Piao,Donghao Li
For the isolation of flavonoids , a novel magnetic and efficient boronic acid (BA)-functionalized iron oxide particle was prepared and applied to a dynamic electromagnetic-field-assisted solid-phase extraction (DeMF-SPE) device. With the help of the dynamic electromagnetic field , it is possible to form a microcolumn with dynamic dispersion of boronic acid-modified magnetic sorbents . As the sample passes through the extraction region, the magnetic sorbent in its dynamic motion enables high-efficiency extraction through active and countless contacts with the target. Meanwhile, five flavonoids (quercetin (Qu), wogonoside (Wo), isoquercetin (Is), daidzin (Da), and baicalein (Ba)) were selected to investigate the selective entrapment of boronic acid modified magnetic particles during the DeMF-SPE process. Several parameters affecting adsorption and desorption conditions were investigated and optimized. Under optimal conditions, the DeMF-SPE–HPLC–MS/MS approach has a wide linear dynamic range and good linearity ( R 2 > 0.99), low detection limits (0.16–1.25 μg L –1 ), and satisfactory recovery (94.9–106.2%). The analytical method was applied to real samples and showed satisfactory adaptability. Therefore, dynamic electromagnetic field-assisted solid-phase extraction (DeMF-SPE) using the prepared magnetic particles can be considered an efficient and rapid analytical method for extracting flavonoids from onion samples.
研究领域:
分析化学
·
植物化学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Yunlian Zhang,Md Mehedi Hassan,Yawen Rong,Rui Liu,Huanhuan Li,Qin Ouyang,Quansheng Chen
Tetracycline, a broad-spectrum antibiotic, has been widely used in disease treatment and other fields. However, due to the unreasonable use, its residue remains in food which eventually harms human health. Here described an upconversion nanosensor for tetracycline detection based on magnetic separation and electrostatic adsorption. To identify tetracycline, tetracycline aptamer, and europium ions (Eu 3+ ) were introduced in the system. According to the electrostatic adsorption principle, Eu 3+ exposed core–shell UCNPs were bound to negative complex of magnetic nanoparticles (MNPs) and aptamer. In the presence of tetracycline, UCNPs separated with MNPs-aptamer and remained in the supernatant by an external magnetic field. Under optimal conditions, the linear detection range of tetracycline was 0.5–1000 ng·mL −1 , and the detection limit was 0.17 ng·mL −1 . It has been successfully applied to detect tetracycline in food samples. The constructed method provided broad prospects for tetracycline detection with the merits of simple operation, high sensitivity, excellent repeatability, and selectivity.
研究领域:
分析化学
·
纳米技术
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Mengna Li,Rui Liu,Bang Hai,Ruobing Hao,Lei Zhao,Huan Zhan,Cuicui Li,Yanli Ma,Zhizhou Chen
Organophosphorus pesticides pose significant hazards to human health and can even cause fatalities, which necessitates the development of effective detection method. Herein, a magnetic-field-assisted fluorescence biosensing platform was designed for rapid and sensitive detection of organophosphorus pesticides. The underlying principle of this strategy was established upon complementary base pairing between aptamer-upconversion nanoparticles (UCNPs) and cDNA-Fe 3 O 4 @MoS 2 . The stable stem-loop structures could provide the structural foundation enabling the aptamers to specifically recognize target pesticides. The formation of the UCNPs-aptamer-cDNA-Fe 3 O 4 @MoS 2 complex gradually decreased with increasing concentrations of target pesticides, leading to a reduction in fluorescence. Methyl parathion was successfully detected using this platform, achieving a detection limit of 0.002 ng/mL within a linear range of 0.01–100 ng/mL. The proposed method has also been validated in the medicinal and edible homologous foods with good recoveries. The platform could be expanded to detect other targets by using appropriate aptamers and cDNA, broadening its potential applications.
研究领域:
生物传感器
·
分析化学
·
纳米技术
·
食品科学
·
环境监测
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Rong Shi,Zhongqi Sun,Xuemei Yu,Huamao Wei,Gaoshang Li,Wenge Yang
The objective of this study was to examine the impact of magnetic field-assisted thawing (MFT) on the quality and microstructure of Portunus trituberculatus meat, in comparison to other thawing methods (Air thawing, AT; Hydrostatic thawing, HT; Microwave thawing, MT). A comprehensive comparative analysis was conducted on different physicochemical and flavor properties of crab meat. MFT significantly reduced thawing loss by 18.9–20.0 % and TBARS levels by 40 % compared to the other methods, demonstrating its ability to minimize lipid oxidation. Microstructure analysis showed that MFT preserved muscle fiber integrity, leading to a denser and more organized structure with reduced protein denaturation. This performance was attributed to MFT’s ability to reduce protein denaturation, which effectively minimizes water loss and inhibits lipid oxidation during thawing. Moreover, MFT improved the retention of key flavor compounds, increasing nonanal and 2-undecanone levels by 31.4 % and 69 %, respectively, contributing to a fresher aroma. MFT group also retained more umami (Glu + 40.8 %) and sweet amino acids (Gly, Ala + about 19.8 %), and nucleotides (AMP + 0.8 %, IMP + 9.4 %), while less bitter amino acids (Lys −68.2 %, Met −51.9 %). In conclusion, MFT had good ability of keeping quality of crabs meat, providing noval thawing method for P. trituberculatus .
研究领域:
食品科学
·
水产养殖
·
生物化学
·
热能工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Daming Yang,Ji Qi,Guiru Sun,Tong Wu,Rui Gao,Ze Gao,Hang Xu,Wei Lu,Ming Feng
Lithium‑oxygen battery (LOB) has attracted great interest due to its ultra-high theoretical specific capacity. However, the practical application of the LOB is obstructed by the high kinetic barriers and large overpotentials. Hence, a novel magnetic field assisted LOB (MF-LOB) is developed with ferromagnetic FeCo 2 O 4 nanowires as catalyst that can improve the ORR and OER kinetics through the application of a moderate magnetic field. The FeCo 2 O 4 nanowires are magnetized into nanomagnets with high spin polarization under a magnetic field, which is beneficial to the adsorption of O 2 -intermediates and transfer of electrons. Equally, the MHD effect contributes to the mass transport and diffusion including O 2 and Li + . The generation and oxidation of Li 2 O 2 are promoted for the MF-LOB based on FeCo 2 O 4 nanowires due to the high spin polarization and MHD effect. The MF-LOB based on FeCo 2 O 4 nanowires shows a lower overpotential of 0.89 V and longer cycle life of 150 cycles than those (1.22 V and 53 cycles) of the LOB without the magnetic field. This unique in-situ magnetic enhancement strategy for optimizing catalyst performance provides a new idea for the development of high-performance external field assisted LOBs.
研究领域:
电化学
·
材料科学
·
储能技术
·
纳米技术
·
应用物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）