JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 23
·1820
·
IF 3.2
Liu Yuhao,Zhang Junjie,Liu Hongli,Cai Yani,Chu Peng,Guo Lei,Ma Yongshuai,Yan Jifeng,Guo Xiang,Zhao Weixu
Microwave absorption materials play a vital role in electromagnetic compatibility applications, where electromagnetic coupling between dielectric and magnetic components is crucial. However, in most reported systems, the magnetic loss capability is generally weaker than dielectric loss. To address this issue and achieve ultra-high loading of magnetic particles, concave SiC fibers were designed and fabricated via electrospinning, providing abundant active sites and enhanced surface curvature for effective deposition of magnetic components.Fe 3 O 4 nanoparticles were in situ grown on SiC fibers via a hydrothermal method to prepare lightweight Fe 3 O 4 /SiC composite fiber microwave absorbers. Systematic investigations reveal that an appropriate Fe 3 O 4 loading uniformly covers the fiber surface, forming abundant heterointerfaces and enhancing dielectric and magnetic loss.Query A high Fe 3 O 4 loading of up to 90 wt% was successfully achieved in the composite system.The Fe 3 O 4 -1:2 sample achieves a minimum reflection loss (RLmin) of−40.62 dB at 6.95 GHz with a 4.0 mm thickness, effectively absorbing over 99.99% of incident electromagnetic waves and exhibiting a wide absorption bandwidth. These results indicate that the synergistic dielectric–magnetic loss and multi-interface polarization mechanisms significantly improve electromagnetic wave absorption, providing a promising strategy for designing lightweight, high-performance ceramic-based absorbers.
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2026
·
IF 7.8
Qianqian Chen,Subing Fan,Junmin Lv,Tiansheng Zhao
The purpose of the olefin hydroformylation-hydrogenation tandem reaction for alcohol synthesis is to design a highly efficient and stable heterogeneous catalyst. In this study, a novel heterogeneous magnetic nanoparticle-supported rhodium-cobalt bimetallic core–shell catalyst was prepared, which exhibits excellent synergistic catalytic performance and enables a one-step alcohol synthesis process. The magnetic support Fe 3 O 4 allows for rapid separation of the catalyst from reaction products under an external magnetic field. The 7.5Co0.5Rh/Fe 3 O 4 @SiO 2 magnetic core–shell catalyst was successfully prepared by loading active metals via a one-pot impregnation method and performing silica coating using the Stöber method. It shows outstanding olefin conversion (99.71%) and alcohol selectivity (91.17%). The effect of preparation conditions, process conditions, and the universality of substrates were investigated in detail. The catalyst was reused 5 times, and the performance differences between the core–shell catalyst and the traditional impregnated catalyst with the same support, as well as the differences in metal leaching during the reaction, were compared. In addition, the catalyst could participate in the reaction directly without prior reduction, avoiding the additional costs associated with subsequent reduction steps.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2026
·
IF 4.4
Bo Xie,Chaonan Jin,Wei Jin,Hao Chen,Yahui Zhang,Zewei Wang,Hongde An
Enzyme immobilization in metal–organic frameworks (MOFs) has emerged as a promising strategy to enhance the stability and reusability of biocatalysts. However, maintaining high enzymatic activity, especially in nonaqueous media, remains a challenge. Herein, we report a facile one-pot in situ encapsulation strategy to coincorporate Fe3O4 nanoparticles and lipase within the cavities of NKMOF-101. The synthesized Fe3O4/lip@NKMOF-101-Ni composite was thoroughly characterized, which confirmed the successful encapsulation of both components. The incorporated Fe3O4 nanoparticles not only endowed the biocomposite with magnetic susceptibility for facile separation but also surprisingly acted as an activity enhancer. In the esterification reaction conducted in a nonaqueous system, the Fe3O4/lip@NKMOF-101-Ni composite demonstrated significantly enhanced catalytic activity, achieving an approximately 6-fold increase compared to free lipase. Furthermore, the magnetic biocomposite exhibited excellent operational stability, retaining over 80% of its original activity after five consecutive uses and could be efficiently recycled. This work presents a novel and effective approach for constructing robust and highly active enzyme-MOF composites for advanced applications in nonaqueous biocatalysis.
✓ 已验证
产品关联
DOI
高影响因子
ChemistrySelect
·
2026
·Vol. 11
·期 34
·e74397
·
IF 2.3
Xiuzhu Ma,Fengyuan Tian,Xinghao Yan,Dan Xue
Efficient removal of bisphenol A (BPA) from aquatic environments is urgently needed due to its toxicity and persistence. Peroxymonosulfate (PMS)-based advanced oxidation processes offer a promising solution, and their effectiveness critically depends on catalysts with efficient charge transfer and stable interfacial properties. Herein, a magnetically recyclable Fe 3 O 4 /Cu 2 O heterojunction was constructed via covalent esterification between polydopamine and citrate layers on each component. Under optimized conditions (catalyst: 90 mg/L, PMS: 2.0 g/L, BPA: 20 mg/L, pH 11), the heterojunction achieved 98% BPA removal within 60 min and retained over 90% of its initial activity after five cycles. Mechanism investigation confirmed •OH and SO 4 • − were the dominant reactive species and elucidated a plausible BPA degradation pathway. This work provided an efficient and recyclable photocatalyst for water treatment and establishes an interfacial engineering strategy for constructing advanced catalysts with promising applications in the environmental and energy fields. Graphical Schematic illustration of the proposed mechanism for PMS activation and BPA degradation over the Fe 3 O 4 /Cu 2 O heterojunction.
✓ 已验证
DOI
高影响因子
Chemosensors
·
2026
·Vol. 14
·期 8
·176
·
IF 4.4
Xiaochun Han,Xuan Wang,Runze Liu,Junjie Yin,Zhiqiang Ai,Ruiyuan Xue,Qixue Liao,Huili Hao
In this study, an electrochemical immunosensor based on polyaniline/nano-Fe3O4(PANI/Nano-Fe3O4) nanocomposite (PANI/Nano-Fe3O4/Anti-FLA/BSA/GCE) was developed for the highly sensitive and selective detection of trace levels of fluoranthene (FLA) in marine environments. Fluoranthene antibodies (Anti-FLA) were covalently immobilized on a glassy carbon electrode (GCE) modified with PANI/Nano-Fe3O4via an EDC/NHS activation strategy, enabling specific recognition of FLA based on the antigen–antibody binding mechanism. The performance of the sensor was systematically optimized using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), and differential pulse voltammetry (DPV). The results demonstrated a linear inverse relationship between peak current (Ip) and FLA concentration in the range of 0.5~80 ng/mL, with a regression equation of I = −1.55C + 174.602 (R2= 0.996). The limit of detection (LOD) was as low as 0.354 ng/mL (S/N = 3). In real seawater sample analysis, spiked recovery tests at three representative sites in the Maowei Sea, Guangxi, yielded recoveries of 95.44%~97.51%, with RSDs below 3%, confirming the sensor’s resistance to matrix interference. The synergistic effect of the porous conductive network of PANI and the high specific surface area of Nano-Fe3O4significantly amplified the electrochemical signal, while the molecular specificity of the antibody ensured targeted recognition. This sensor provides a novel and effective approach for the on-site rapid detection of polycyclic aromatic hydrocarbon (PAH) pollutants in complex marine environments, offering both high sensitivity and selectivity.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Jian-Wu Xiao,Li-Wang Jiang,Yu-Ma Yang,Zi-Kun Lin,Ze-Wu Xie,Shao-Xin Bei,Fu-An He
In this work, novel MnO2–Fe3O4/melamine (MA) sponges have been prepared for oil–water separation. First, MnO2 nanorods were synthesized by a hydrothermal method and their morphology could be controlled by different reaction conditions. Next, the as-prepared MnO2 nanorods were used alone or in combination with Fe3O4 nanoparticles to obtain hydrophobic MA sponges by surface modification with the assistance of silane coupling agents and/or Sylgard 184 adhesive. The realization of the high roughness and the coating with a low surface energy material for surface-modified MA sponges were mainly confirmed by SEM and FTIR, respectively, which were two key factors for the enhancement of hydrophobicity. All investigated MnO2/MA and Fe3O4/MA sponges were hydrophobic but with the water contact angles (WCAs) lower than 150°, while the WCAs of MnO2–Fe3O4/MA sponges could reach or exceed 150° under suitable preparation conditions achieving superhydrophobicity, which was attributed to the improved roughness. Both MnO2/MA and MnO2–Fe3O4/MA sponges had good oil–water separation ability by direct adsorption and gravity filtration, and their adsorption capacities for different oils were measured to be 37–50 g g−1 and 35–67 g g−1, respectively. Additionally, the saturation magnetization of the MnO2–Fe3O4/MA sponge could reach as high as 17.3 emu g−1, which is beneficial for the magnetic control operation during oil–water separation application.
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6.3
Bo Li,Lin Zhao,Yu Zhong,Lu Zhang,Mao-Chang Cao,Huan-Yan Xu,Cai-Xu Yue
The efficiency of heterogeneous Fenton catalysts is often constrained by poor mass transfer at the solid-liquid interface and challenges in catalyst recovery. To address this, a novel Fe 3 O 4 /hydrophilic graphene (Fe 3 O 4 /HG) nanocomposite was synthesized via a one-pot method involving the grafting of sodium dodecylbenzenesulfonate (SDBS) onto graphene oxide followed by in-situ deposition of Fe 3 O 4 nanoparticles (90 wt% loading). The material was thoroughly characterized by XRD, SEM, TEM, Raman, FT-IR, and contact angle measurements, while Density Functional Theory (DFT) calculations elucidated the interfacial interaction mechanisms. The introduced sulfonic acid groups drastically enhanced hydrophilicity, reducing the water contact angle to 15.0° (compared to 38.8° for Fe 3 O 4 /rGO) and improving aqueous dispersion. The optimal catalyst (FHG-W90) achieved 99% degradation of methyl orange (30 mg·L −1 ) within 60 min under optimal conditions ([Catalyst] = 2.0 g ·L −1 , [H 2 O 2 ] = 14.5 mmol·L −1 , pH=3), significantly outperforming control samples (Fe 3 O 4 NPs and Fe 3 O 4 /rGO). Meanwhile, the nanocomposite retained sufficient saturation magnetization (∼70 emu·g −1 ) for facile magnetic separation. DFT calculations quantitatively revealed that SDBS functionalization intensified the adsorption energy ( E ads ) of H 2 O (from -7.9 to -12.0 kcal·mol −1 ) and H 2 O 2 (from -8.2 to -13.2 kcal·mol −1 ) on the graphene surface. This work highlights interface engineering via hydrophilic modification as a highly effective strategy for developing high-performance and easily recyclable Fenton catalysts. The Fe 3 O 4 /HG nanocomposite shows great promise for practical wastewater treatment, and the design principle can be extended to other catalytic systems.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 44
·17503-17511
·
IF 8.262
Yingying Chen,Xiaojun Quan,Zhongyong Wang,Chiahsun Lee,ZiZhao Wang,Peng Tao,Chengyi Song,Jianbo Wu,Wen Shang,Tao Deng
Poor dispersion stability has become one of the major obstacles to the practical application of thermal nanofluids, especially for silicone-oil-based nanofluids that are used at relatively high operating temperatures. Herein, by using Fe3O4 nanofluid as a model system, we report a facile and effective strategy to prepare stably dispersed silicone-oil-based nanofluids that enable high-temperature operation. The strategy involves a series of processes, including controlled high-temperature synthesis of nanoparticles, surface modification of particles, and post-modification particle size partition. The solvothermally synthesized particles not only possess high thermal stability, but also allow for easy surface modification through ligand exchange. Phosphate-terminated polydimethylsiloxane ligands, which simultaneously possess high compatibility with silicone-oil-based fluid and high temperature stability, were used to exchange synthetic ligands and robustly anchor onto the particle surfaces, offering effective screening of the interparticle attraction. After centrifugal removal of the large-sized surface-modified particles, the prepared nanofluids have demonstrated stable dispersion at temperatures slightly lower than the particle synthesis temperature. The stably dispersed Fe3O4/silicone-oil nanofluids have been successfully utilized for consistent volumetric harvesting of solar thermal energy at more than 110 °C.
研究领域:
纳米材料
·
太阳能
·
热工工程
·
胶体与界面科学
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2016
·Vol. 74
·期 5
·1116-1126
·
IF 1.064
Jiang Hao,Sun Yabing,Feng Jingwei,Wang Jian
Azo dye methyl orange (MO) degradation by heterogeneous electro-Fenton (EF) with a magnetic nano-Fe 3 O 4 catalyst was investigated. In this study, Fe 3 O 4 was synthesized by a coprecipitation method and characterized by X-ray diffraction and scanning electron microscopy. The influences of the main operating parameters such as current density, pH, catalyst dosage and aeration rate were studied. The results revealed that higher current density, catalyst dosage and aeration rate facilitated the degradation of MO, whereas the degradation efficiency of MO was decreased with an increase in the initial pH. After 90 min EF process, the volume of 500 mL, the initial concentration of 50 mg L −1 MO solution could be degraded by 86.6% with the addition of 1 g L −1 Fe 3 O 4 under the current density of 10 mA cm −2 and pH 3, compared with 69.5% for the electrolytic process alone. Meanwhile, a total organic carbon removal of 32% was obtained, up to 35.5 mg L −1 accumulated H 2 O 2 and less than 3.5 mg L −1 Fe leaching were detected. Moreover, based on the results of natural bond orbital (at B3LYP/6-311G (d, p)) and liquid chromatograph-triple quadrupole mass spectrometer analysis, nine intermediates were identified and the proposed degradation pathways were investigated.
✓ 已验证
DOI
高影响因子
OZONE-SCIENCE & ENGINEERING
·
2016
·
IF 0.853
Shengtao Jiang,Jianzhong Zhu,Ying Ding,Shuli Bai,Yujiang Guan,Jia Wang
The characteristics and influencing factors for dinitrotoluene degradation by nano-Fe3O4-H2O2 were studied, and the nano-scale Fe3O4 catalyst was prepared by the coprecipitation method, with dinitrotoluene wastewater as the degradation object. The results showed that the catalytic reaction system within the pH value range of 1 to 9 could effectively degrade dinitrotoluene, and the optimal pH value was 3; with the increase of catalyst dosage, the degradation efficiency and the catalytic reaction rate of dinitrotoluene grew as well. The optimal catalyst dosage was 1.0 g/L when the H2O2 dosage was within the range of 0 to 0.8 mL/L; the degradation efficiency and reaction rate grew with the increase of H2O2 dosage. With further increase of H2O2 dosage, degradation efficiency and reaction rate decreased; under the best conditions with the H2O2 dosage of 0.8 mL/L, the catalyst concentration of 1 g/L and the pH value of 3 at room temperature (25 °C), the degradation rate of the 100-mg/L dinitrotoluene in 120 min reached 97.6%. Through the use of the probe compounds n-butyl alcohol and benzoquinone, it was proved that the oxidation activity species in the nano-Fe3O4-H2O2 catalytic system were mainly hydroxyl radical (•OH) and superoxide radicals (HO2 •), based on which, the reaction mechanism was hypothesized.
研究领域:
环境科学
·
化学工程
·
高级氧化技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
He Guo,Zhen Li,Ying Zhang,Nan Jiang,Huijuan Wang,Jie Li
Pulsed discharge plasma (PDP) was coupled with Fe 3 O 4 nanocomposites for promoting degradation of chloramphenicol (CAP) based on Fenton reaction. The prepared Fe 3 O 4 nanocomposites were characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, X-ray photoelectron spectroscopy and vibrating sample magnetometer. The results showed that Fe 3 O 4 could be successfully prepared by hydrothermal method with reasonable composition. The magnetic intensity reached 71.99 emu/g, which could be easily separated from the solution when an external magnet was applied. Compared to PDP alone, the removal efficiency, kinetic constant and energy efficiency enhanced when Fe 3 O 4 was added. Synergetic effect was achieved between PDP and Fe 3 O 4 . The optimal catalytic performance was obtained when the dosage was 0.26 g/L. CAP was beneficial to decomposition with higher peak voltage, lower initial solution concentration and lower initial pH value. With increasing air flow rate, the removal efficiency enhanced firstly and then declined. Although four times use, Fe 3 O 4 still maintained a higher stability. The concentration of H 2 O 2 and O 3 generated by PDP were all declined when Fe 3 O 4 was added. With the treatment time prolonged, the pH value declined but conductivity improved. The conjugate heterocyclic structures were destroyed during CAP degradation. The degradation pathway mainly related to the cleavage of phenyl-nitryl, C OH, C Cl and C N bonds, resulting in the formation of intermediates containing benzene ring. The benzene ring of intermediates were underwent rupture and transformed to small organic acids and inorganic acids, which were mineralized into Cl − , NO 3 − , CO 2 and H 2 O finally. The toxicity of CAP was alleviated after plasma-catalytic treatment. The overall findings provided a new insight into wastewater treatment by PDP with heterogeneous Fenton catalyst.
研究领域:
环境科学
·
化学工程
·
高级氧化技术
·
纳米催化
·
等离子体化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2017
·Vol. 35
·期 7
·1149-1156
·
IF 1.852
Xuejia Gao,Libo Niu,Xianliang Qiao,Wenhui Feng,Yingying Cao,Guoyi Bai
A novel NiB deposited layered double hydroxide (LDH) coated ferroferric oxide (Fe 3 O 4 @LDH@NiB) magnetic core-shell nanocomposite was successfully fabricated by the combination of coprecipitation and impregnation-reduction. During the Fe 3 O 4 @LDH preparation, a facile template-free approach was employed to introduce the LDH shell, which was more efficient than the conventional method for the preparation of mesoporous materials that always needs to introduce and remove templates. The resulted Fe 3 O 4 @LDH has a relatively high surface area and abundant surface hydroxyl group, which can adsorb metal ions, making it favorable to disperse and stabilize the active Ni species, as demonstraed by TEM, XPS, FT-IR and BET characterizations. Therefore, it exhibited good activity in the selective hydrogenation of cinnamic acid to hydrocinnamic acid with the conversion and selectivity both approaching to 100%. Notably, the obtained Fe 3 O 4 @LDH@NiB can be easily separated by an external magnetic field and recycled eleven times without appreciable loss of its initial catalytic activity.
研究领域:
材料化学
·
纳米催化
·
绿色化学
·
应用化学
·
功能材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）