APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
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2025
·Vol. 131
·期 11
·1-12
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IF 2.8
Song Ziyan,Ma Ruolong,Zheng Xiaodan,Zhang Limeng,Ruan Chuanda,Yan Xiaohui,Tian Fei
In this study, Fe 3 O 4 @C@Cu 2 O was synthesized using a solvothermal method. The morphology and structural characteristics of the material were systematically investigated through various characterization techniques, including TEM, XPS, FT-IR, DLS, and VSM. Its antibacterial efficacy was assessed through colony counting. Results showed that at a concentration of 0.5 mg/mL, Fe 3 O 4 @C@Cu 2 O nanoparticles with a copper atomic percentage of 2.42% achieved bactericidal rates of 98.45% against E. coli and 90.58% against S. aureus . Compared to pure Fe 3 O 4 @C and Cu 2 O, the composite material demonstrated a 100% bactericidal rate against E. coli and 99.23% against S. aureus . Notably, after five cycles, the composite nanoparticles maintained effective bactericidal rates, with 82.16% against S. aureus and 94.72% against E. coli . SEM images of bacterial morphology and EPR tests confirmed that the antibacterial mechanism primarily involves the generation of reactive oxygen species(ROS).
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高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Baoding Li,Zhihui Zeng,Jing Qiao,Yunfei Yang,Dongmei Xu,Haoyuan Tian,Wei Liu,Jiurong Liu
A type of hollow core–shell ZnO/Fe3O4@C fibers were fabricated by a facile combination of electrospinning, calcination, and pyrolytic pyrrole-derived carbon coating. The combination of ZnO/Fe3O4 fibers and carbon nanolayer improved the dielectric loss capability of the nanocomposites and obtained good impedance matching, leading to excellent electromagnetic wave (EMW) absorption performance. The minimum reflection loss of the ZnO/Fe3O4@C nanocomposites reached −74.2 dB at a thickness of merely 2.2 mm, and the effective absorption bandwidth reached 5.5 GHz at a matching thickness of 2.1 mm. Compared with the ZnO- or Fe3O4-based composites ever reported, our ZnO/Fe3O4@C nanocomposites exhibited superior EMW absorption characteristics due to the efficient design of multiple synergistical components and hollow fibrous structures. Combined with the facile, scalable preparation approach, the hollow core–shell ZnO/Fe3O4@C nanocomposite fibers with high EMW absorption performance show great potential for EMW absorption applications.
研究领域:
材料科学
·
电磁学
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高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 5
·3311-3320
·
IF 2.1
Li Kai,Qin Renchi,Xiong YiQuan,Ding Ling,Wen JianWu,Zeng Min
Despite the high theoretical capacity of iron-based anode materials, they still perform poorly in electrical conductivity and volume expansion during the charge/discharge process, which can reduce battery life and cause deterioration in cycle performance. In the present study, iron-based metal–organic frameworks are synthesized through a simple co-precipitation method, and then heat-treated as a self-sacrificing template to obtain carbon-coated Fe 3 O 4 of a porous ortho-octahedral structure. As revealed by electrochemical performance studies, this material maintains a high specific capacity, showing a reversible capacity of 1063 mAh/g and 896 mAh/g after 300 cycles at a current density of 0.5 A/g and 1 A/g. By analyzing the functional mechanism of surface carbon coating, it is demonstrated that the fast ion migration and high electrical conductivity required for fast charging and discharging are ensured by the octahedral and hierarchical void structure of the carbon framework. This study thus provides a reference for the design of high-performance electrode materials. Graphical Abstract
研究领域:
材料科学
·
电化学
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高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2020
·
IF 4.872
Jiahong Wang,Yao Chen,Tongtong Sun,Atif Saleem,Chuanyi Wang
A novel amino-functionalized magnetic adsorbent (Fe 3 O 4 @C@DETA) was developed for adsorption of Cr(III) and Cr(III)-EDTA from wastewater. Fe 3 O 4 @C@DETA were successfully prepared by modification of Fe 3 O 4 @C with diethylenediamine (DETA), which exhibits a core-shell structure and sufficient saturation magnetization. Fe 3 O 4 @C@DETA exhibits much better adsorption performance for Cr(III) and its chelates than the Fe 3 O 4 @C because of newly introduced amino active sites. The enhanced adsorption capacity of Fe 3 O 4 @C@DETA for Cr(III) is 44.74 mg g −1 (at 25 °C and pH 3.0), which is due to the surface coordination with the newly introduced amino functional sites. The Cr(III)-EDTA anions as a whole was adsorbed through the electrostatic interaction with protonated amino species of the Fe 3 O 4 @C@DETA and have maximum adsorption capacity of 47.27 mg g −1 (at 25 °C and pH 3.0). The adsorption data of free and EDTA coordinated Cr(III) were followed the Langmuir equation, while the adsorption dynamics was well explained by pseudo second order model indicating the chemical nature of adsorption process. The higher concentration of Ca 2+ ions in the wastewater compete for adsorption sites and inhibit the Cr(III) removal, while on other hand Ca 2+ ions promotes the adsorption of Cr(III)-EDTA, because of electrostatic interaction with adsorbent active sits. Furthermore, the adsorbent can be easily separated by external magnetic field and regenerated in acidic solution. The adsorbent is stable, recyclable and have more than 75% regeneration efficiency and can be repeatedly used in the adsorption process.
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Qingui Yang,Na Li,Qiang Li,Shaoqing Chen,Hsing-Lin Wang,Haipeng Yang
Sarcosine is a recently identified biomarker for prostate cancer. However, the rapid detection methods for sarcosine are relatively lack because of the low concentration and the presence of complicated interfering substances in serum or urine. In this manuscript, hollow nanospheres of Fe 3 O 4 was synthesized and used as carrier to disperse Pt (Pt) nanoparticles . In order to achieve excellent electron transfer ability, we use polyaniline to coat Pt–Fe 3 O 4 nanoparticles, and pyrolyze the polyaniline to carbon (C). Thus, hollow magnetic Pt–Fe 3 O 4 @C nanocomposites with good electron transfer ability are formed. The Pt–Fe 3 O 4 @C nanocomposites have high catalytic activity and stability. The nanocomposites were immobilized on glassy carbon electrode (GCE) to construct a nonenzyme hydrogen peroxide (H 2 O 2 ) sensor (Pt–Fe 3 O 4 @C/GCE). We further construct a sensitive sarcosine biosensor by immobilizing sarcosine oxidase (SOx) on the Pt–Fe 3 O 4 @C/GCE. The high catalytic activity and good biocompatibility of Pt–Fe 3 O 4 @C nanocomposites greatly retained the bioactivity of immobilized SOx, and the prepared sarcosine biosensor has good electrocatalytic performance towards sarcosine. It has a linear detection range between 0.5 and 60 μM with a limit of detection (LOD) of 0.43 μM (the signal to noise ratio is 3), and the sensitivity is 3.45 nA μM −1 (48.8 nA μM −1 cm −2 ), which has the potential to be used for rapid screening of prostate cancer.
研究领域:
生物化学
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医学检测
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纳米材料科学
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Dongyao Yue,Zhe Wang,Jing Chang,Shaopo Wang,Jingjie Yu,Hongying Meng,Rui Zhang
In the O 3 self-decomposition process, the poor HO 2 − formation efficiency limits O 3 decomposition and •OH production. Although the addition of Fenton’s reagent facilitates this process, H 2 O 2 consumption and Fe(III) sedimentation must be addressed. In this study, carbon-coated Fe 3 O 4 (Fe 3 O 4 @C) samples were prepared using the metal–organic frameworks (MOFs) modification method for the catalytic ozonation of aromatics, which effectively solved the above challenges. The fabricated 4-Fe 3 O 4 @C catalyst not only exhibited a yolk-shell structure, but also increased •OH production by 9-fold, resulting in optimal target removal, mineralization, and O 3 decomposition efficiency. Further investigation confirmed that the activity of 4-Fe 3 O 4 @C was owing to the combined action of Fe(II) on the catalyst surface and the H 2 O 2 produced from aromatic degradation. Furthermore, the outer carbon layer with reducing properties regenerated Fe(II) in a timely manner, ensuring catalyst durability. Finally, a clear pathway for enhancing O 3 decomposition and •OH generation is proposed.
研究领域:
环境科学
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材料科学
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Polymers
·
2025
·Vol. 17
·期 3
·257
·
IF 4.9
Shoulian Wei,Shenwei Huang,Jun Zhou,Chun Xiao,Jiangfei Cao,Jibo Xiao,Chunsheng Xie
In this study, magnetic carbon nanopolymers (Fe3O4/C@PM) were synthesized by suspension polymerization using magnetic carbon nanoparticles as the matrix, 2-thiophene formaldehyde and acrylamide as the monomers, and ethylene glycol dimethacrylate (EGDMA) as the crosslinking agent. The obtained material was characterized using multiple techniques, including scanning electron microscopy (SEM), infrared spectroscopy (FTIR), X-ray diffraction (XRD), N2adsorption–desorption, and thermogravimetric analysis (TGA). The adsorption effects of Zn2+, Cd2+, and Pb2+in the mixed solution were evaluated using magnetic carbon nanoparticles (Fe3O4/C) and Fe3O4/C@PM as adsorbents. The adsorption isotherms, kinetic models, and cyclic regeneration of various metal ions, including Zn2+, Cd2+and Pb2+, were studied. The results showed that the Fe3O4/C@PM maintained a slightly aggregated spherical morphology similar to Fe3O4/C and exhibited excellent adsorption capacity for all of Zn2+, Cd2+, and Pb2+, with maximum adsorption capacities of 343.3, 250.7, and 177.6 mg·g−1, respectively. The adsorption mechanisms were mainly based on the chemical interactions between metal ions and functional groups on the surface of polymers. The kinetic study revealed that the adsorption process followed a pseudo-second-order kinetic model. When Fe3O4/C@PM was reused five times, its adsorption rates for Zn2+, Cd2+, and Pb2+remained above 81%, indicating its great potential for the treatment of wastewater containing Zn2+, Cd2+, and Pb2+.
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Juan Ding,Ligang Cheng,Na Zhang,Jiale Sun,Jin Gao,Mengkang Bi
The development of electromagnetic microwave (EMW) absorbers featuring broad bandwidth, low cost, and engineering feasibility is considered strategically important to address the application demands of 5G/6G communications and stealth technologies. In this study, the CuS/Fe3O4/C nanocomposites with enhanced absorption properties were synthesized through the incorporation of CuS into a polyacrylonitrile (PAN) precursor using electrospinning technology. The obtained composites demonstrate an ultrawide effective absorption bandwidth (EAB) in the X and Ku bands, achieving a minimum reflection loss (RLmin) of −50.37 dB at 15.44 GHz with a thickness of 1.9 mm, along with an EAB of 4.8 GHz (RL ≤ −10 dB, 13.2–18 GHz). For the CuS/Fe3O4/C nanocomposites with 10% CuS loading, optimal EMW absorption performance was observed at 3.5 mm, exhibiting an RLmin of −40.09 dB at 6.96 GHz and an ultrawide EAB covering 9.6 GHz (RL ≤ −10 dB, 8.4–18 GHz). Based on Cole–Cole curve analysis, the nanocomposite with 20% CuS loading is characterized by five distinct and well-defined relaxation arcs, confirming its remarkable dielectric loss capability. Furthermore, CST simulation results indicate that the radar cross-section (RCS) values of compressed samples were significantly reduced, which is attributed to improved magnetic absorption. These findings substantiate that the superior EMW absorption performance of the nanocomposites stems from a strong polarization loss mechanism and considerable eddy current loss. This study underscores the significant potential of the CuS/Fe3O4/C nanocomposites in ultrabroadband EMW absorption research and offers valuable guidance for further in this area.
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Materials Research Express
·
2024
·Vol. 11
·期 1
·016301
·
IF 1.8
Lei Li,Long Ma,Xin Guo,Xiaoming Li,Tiejun Liu
In order to solve the problems of low cathode conductivity, shuttle effect, and poor electrochemical performance of Li-S batteries, we designed a porous carbon/nano-sized ferric oxide (Fe3O4) composite modified membrane. This improved both conductivity and adsorption capacity of lithium polysulfides (LiPSs) prepared with mesopores and high specific surface area C-Fe3O4@PE. The membrane can bind polysulfide via chemical and physical adsorption. Owing to these advantages, a Li-S battery based on C-Fe3O4@PE and with a separator exhibited excellent rate performance (965.9 mA h g–1 at 0.2 C and 437.5 mA h g–1 at 5 C), as well as a long cycle life (416.6 mA h g–1 after 300 cycles at 0.5 C, with a capacity retention rate of 50.5%).
研究领域:
材料科学
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电化学
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高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2016
·
IF 2.848
Jia-liang Lv,Qing-da An,Wei Zheng,Yuan Fan,Zhi-min Lei,Shang-ru Zhai
There is an interesting yet challenging task to develop a facile procedure for designing multifunctional carbonaceous materials for environmental applications. In this research, multifunctional hierarchical cabbage-like carbonaceous materials (Fe/CCMs-X) have been fabricated via a facile hydrothermal carbonization (HTC) of furfural in the presence of cobalt acetylacetonate, followed by simple impregnation iron salts and heating treatment. The structure, morphology and magnetic properties were characterized by powder X-ray diffraction (XRD), N 2 adsorption-desorption isotherms, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM) and vibrating sample magnetometry (VSM) techniques; and its adsorption behaviors of Cr(VI) were investigated in detail. Batch experiments were conducted at relatively mild conditions (pH ∼ 3). The adsorption equilibrium data was best fitted by Langmuir isotherm model and the adsorption kinetics followed pseudo-second-order models. The maximum capacity predicted by the Langmuir model is 75.3 mg/g for Fe/CCMs-800. Furthermore, thermodynamic parameters (Δ H > 0, Δ S > 0, and Δ G < 0) revealed that the sorption reaction was a spontaneous and endothermic process. Most of important, the excellent magnetism (79.9 emu g −1 ) provided an ideal magnetic-separation performance from aqueous systems. It demonstrated that this newly prepared multifunctional hierarchical carbonaceous materials (Fe/CCMs-X) are promising sorbents for chromium(VI) ions removal from water.
研究领域:
环境科学
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材料科学
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Xingliang Chen,Zirui Jia,Ailing Feng,Bingbing Wang,Xiaohua Tong,Chuanhui Zhang,Guanglei Wu
In this work, a novel Fe 3 O 4 @C@MnO 2 hybrid was successfully synthesized via facile method. The morphology, structure, chemical composition , magnetic behavior and EM wave absorbing performance of the hybrid were systematically investigated. Results indicate that the hybrid possesses uniform hierarchical and mesoporous structure. The magnetic saturation(Ms) value of the hybrid is 19.8 emu g −1 , which is beneficial to improve magnetic loss. According to its reflection loss curve, the hybrid performs superior EM wave absorption capacity, with a minimum reflection loss value and effective absorbing bandwidth of −35 dB and 5 GHz when the specimen thickness is 2.7 mm. The excellent performance of this hybrid can mainly be attributed to its ideal matching of magnetic loss and dielectric loss, large specific surface area, mesoporous structure and interfacial polarizations. Such new material has the potential to be a superior electromagnetic wave absorber, or applied as a functional filler to modify resin matrix.
研究领域:
材料科学
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电磁学
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Wang Lei,Guo Shaoyun,Chen Qin,Zhang Xianlong
At present, most leuco-dye-doped dosimeters exhibit detection limits for γ-rays in the range of tens to hundreds of Gy, which remains insufficient for numerous industrial and medical applications requiring lower radiation doses. Herein, a novel highly sensitive photonic hydrogel radiochromic film is reported. This is the first fabrication of methacrylic anhydride modified Gelatin (GelMA) based carbon-coated Fe 3 O 4 nanoparticles (Fe 3 O 4 @C NPs) film with a magnetic field-induced one-dimension (1-D) periodic structure for γ-irradiation detection. Upon exposure to γ-irradiation, the active vinyl-containing GelMA matrix undergoes cross-linking-induced volume contraction, leading to alterations in the periodic structure of Fe 3 O 4 @C NPs and consequent structural color changes. This photonic film exhibits a high sensitivity of radiochromic behavior, displaying clear green change even at a low dosage of 5 Gy γ-ray. This magnetic field-induced construction of the photonic periodic structure is a much simpler method than that of typical opal or inverse opal. In addition, optimized radiochromic behaviors are achieved by choosing appropriate nanoparticles (e.g., sizes or additive amounts). Graphical
研究领域:
材料科学
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放射医学
·
纳米技术
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高影响因子
危险品化学品经营许可证（带存储）