MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 9
·596
·
IF 5.4
Wang Wenzhuo,Lu Juan,Jiang Hanyue,Han Pengfei,Ma Guangping,Li Ruixin,Mao Huiyuan,Ma Tengying,Wang Jing,Chen Ruizhan,Tian Li
A dual-mode sensing platform has been developed for ultrasensitive malathion (MAT) detection based on bifunctional rGO@ZnO/Zn-Fe 3 O 4 composites (reduced graphene oxide-supported ZnO nanorods and Zn-doped Fe 3 O 4 microspheres). The rGO@ZnO/Zn-Fe 3 O 4 nanozyme is fabricated via a one-pot hydrothermal strategy and integrates favorable electrochemiluminescence (ECL) emission and intrinsic peroxidase-mimicking activity to realize dual-signal readout. In the K 2 S 2 O 8 ECL system, Au NPs@UiO-66 serves as a coreactant booster to further magnify the ECL intensity of the composite. Meanwhile, the nanozyme catalyzes the H 2 O 2 -mediated oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) to produce a colorimetric response. MAT suppresses both ECL and colorimetric responses by occupying Fe 2+ /Fe 3+ catalytic sites and scavenging of reactive radicals. The sensor achieves limits of detection as low as 2.8 × 10 –13 mol/L under ECL mode and 1.32 × 10 –6 mol/L under colorimetric mode. In practical testing of MAT-spiked vegetable samples, the sensor exhibits acceptable recoveries and low relative standard deviations, demonstrating its practicability for field food safety supervision and rapid pesticide residue screening. Graphical abstract
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Journal of the Iranian Chemical Society
·
2026
·Vol. 23
·期 9
·283
·
IF 2.4
Wu Rui,Tian Guanghui,Liu Cunfang,Li Yapeng
The controlled synthesis of hybrids nanoparticles (NPs) and polymer have received significant attention for application in environment. In the paper, green and multifunctional polymer-based Fe 3 O 4 /hydroxyapatite (HAp)/polyacrylic acid (PAA)/ polyacrylamide (PAM) nanohybrids with magnetism was fabricated by polymerization. The obtained materials (Fe 3 O 4 /HAp/PAA/PAM) was characterized by hysteresigraph, X-Ray diffractometer (XRD), infrared spectrometer (IR), energy dispersive spectroscopy (EDS), mapping, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM). The decontaminating performance of the nanohybrids was evaluated by adsorption methylene blue (MB). Adsorption kinetics and adsorption isotherms were employed to examine the adsorption behavior. The results showed that the adsorption process fitted the Langmuir isotherm and pseudo-second-order kinetic model and Fe 3 O 4 /HAp/PAA/ PAM displayed appreciable adsorption efficiency. The adsorption mechanism was also presumed. The removal of dye mainly attributed to polymer with multifunctional groups and the special structure of HAp. Moreover, it is facile to retrieve due to the incorporation of Fe 3 O 4 with strong magnetism. It proposed a novel route to design and fabricate multifunctional nanohybrid adsorbent for removal of dye with high capacity.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·Vol. 74
·期 32
·25644-25659
·
IF 6.7
Liu Bingbing,Yang Tianshuo,Liu Shuangshuang,Pan Hong,Ren Xiaoxuan,Zhang Haotian,Xu Yuanhui,Gao Faming
A hierarchical Zn-substituted Fe 3 O 4 @NC/CuS@MoS 2 heterostructure was rationally
designed for
the electrochemical
detection of organophosphorus pesticides such as methamidophos and
dichlorvos. Hollow Fe 2 O 3 nanospheres were synthesized
hydrothermally, followed by Zn-substitution, polydopamine-derived
nitrogen-doped carbon coating, and in situ growth of CuS@MoS 2 nanosheets. The Zn-substitution modulates the electronic structure,
while the carbon network and the CuS@MoS 2 heterojunction
synergistically enhance charge transfer kinetics, increase the electroactive
surface area, provide abundant sites for acetylcholinesterase immobilization,
and ensure favorable biocompatibility. The resulting enhanced interfacial
electron transfer reduces the charge transfer resistance to 41.6 Ω.
The biosensor exhibits broad linear ranges for methamidophos (7.09
× 10 –7 μM to 7.09 × 10 –2 μM) and dichlorvos (4.53 × 10 –7 μM
to 4.53 × 10 –2 μM), with detection limits
of 8.7 × 10 –8 μM and 2.0 × 10 –7 μM, respectively. Real-sample analysis in Chinese
cabbage and apple yields recoveries of 96.36%–102.40% for methamidophos
and 95.92%–101.77% for dichlorvos, confirming its practical
viability for trace pesticide monitoring.
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Journal of Cleaner Production
·
2026
·
IF 10.7
Mengmeng Kong,Hairong Jing,Wenrui Li,Huilian Xu,Xiaoyong Liu,Yu Shen
Conventional rice production through excessive chemical inputs violates cleaner production principles, with disease-susceptible varieties requiring 40% more agrochemicals while experiencing 10-30% yield losses. This study investigates Fe 3 O 4 nanoparticles as a potential cleaner production technology for sustainable rice enhancement through precision metabolic intervention. Applying 0.5 mg/L magnetite nanoparticles (5 nm) to rice achieved remarkable growth promotion: 193.44% shoot height enhancement and 74% root elongation using 50% less iron than conventional FeCl 3 , representing substantial improvements in nutrient utilization efficiency compared to traditional fertilizers. Metabolomics analysis (2085 metabolites) revealed mechanisms enabling this efficiency transformation: biphasic metabolic reprogramming from anabolic activation (0-48h) to defense priming (48-72h) avoided growth-defense trade-offs, while coordinated hormone regulation maximized resource utilization. The narrow optimal concentration (0.5 mg/L) demonstrates precision delivery advantages, eliminating wasteful over-application common in conventional approaches. Twenty metabolic pathways showed coordinated reorganization, enabling multifunctional benefits from single intervention. Unlike conventional fertilizers causing nutrient runoff and soil degradation, nanoparticles provide controlled release with potential for reduced environmental contamination. These findings establish nanotechnology-enabled approaches as potentially viable for sustainable rice production, offering pathways to while enhancing productivity. The demonstrated 50% reduction in iron requirements combined with growth enhancement provides molecular foundations for future assessment of Fe 3 O 4 nanoparticles in sustainable rice production systems, directly supporting efforts toward responsible agricultural production and food security.
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Journal of Macromolecular Science Part B-Physics
·
2026
·
IF 1.4
Suwei Gao,Yucheng Wang,Liang Li,Xi Wang,Qiaofeng Wei,Shuyue Zhu,Rangtong Liu
The development of high-performance electromagnetic wave (EMW) absorbing materials aims to achieve high-intensity electromagnetic attenuation and wide effective absorption bandwidth (EAB), but in fact, it is challenging for them to optimize synchronously. In this paper, through the hydrothermal method, an EMW absorber was synthesized by loading nanomagnetic Fe3O4 on multi walled carbon nanotubes (MWCNTs), of which the structure and properties depend on precursor (FeCl3·6H2O) addition and MWCNTs modification. Using this absorber, a coating named Fe3O4/MWCNTs/WPU with good EMW absorption performance was prepared with waterborne polyurethane (WPU). By characterizing the structure and properties of the absorbers and coatings, it was found that the optimal distribution of Fe3O4 particles presented when adding 1.0 g FeCl3·6H2O. After MWCNTs acidizing modification, Fe3O4 particles present on them with a “bead-chain” like uniformly dense structure, and the coating exhibited a wider EAB of 8.64 GHz at a thickness of 3.0 mm and a smaller reflection loss of −52.61 dB at a thickness of 4.0 mm. These findings effectively achieve the balance between EAB and intensity of EMW, and reveal some principles for optimizing electromagnetic absorption, providing important basis for designing new materials with wide bandwidth and strong absorption capacity.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Aijun Ren,Dingwei Ye,Yao Chen
Fe 3 O 4 nanoparticles were coated with SiO 2 via the sol-gel method to obtain Fe 3 O 4 @SiO 2 nanoparticles. Optimal preparation conditions were identified as a molar ratio of Fe 3 O 4 : tetraethyl orthosilicate (TEOS): ammonia solution of 1:3:6. The surface of the resulting Fe 3 O 4 @SiO 2 nanoparticles (Fe 3 O 4 @SiO 2 -CN，MCNPs) was then functionalized with 3-aminopropyltriethoxysilane (APTES) and n-octyltriethoxysilane (OTES) to produce amphiphilic magnetic MCNPs. Characteristic peaks observed in the FTIR and XRD spectra, along with the core-shell structure revealed by TEM analysis, confirm the successful synthesis of the MCNPs, which exhibit a maximum magnetization of 33.82 emu·g −1 . MCNPs also exhibit excellent thermal stability (up to 300 ℃), dispersion stability, and amphiphilic properties (with a surface contact angle of 61.3°). Experimental results demonstrate that MCNPs possess an exceptional emulsifying capacity: 0.3 wt% MCNPs can reduce the oil-water interfacial tension from 26.9 mN·m −1 to 3.1 mN·m −1 , effectively enhancing the interfacial film strength and interfacial stability. Furthermore, MCNPs offer outstanding synergistic processing advantages throughout the entire workflow, including reducing viscosity, regulating emulsions and facilitating recovery. MCNPs achieve an efficiency of over 90 % in reducing viscosity for various types of heavy oil. After five consecutive recycling cycles, they achieve a recovery rate of 96.5 % and a viscosity reduction efficiency of 90.04 % (a 3.51 % decrease). Studies of the adsorption microscopic mechanism confirm that MCNPs can disrupt the internal structure of heavy oil, making it more susceptible to deformation and flow. The MCNPs then diffuse and adsorb at the oil-water interface, effectively reducing the oil-water interfacial tension and thereby lowering the viscosity of the heavy oil.
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CERAMICS INTERNATIONAL
·
2026
·
IF 6
Lei Liu,Chen Zhang,Bo Jiang,Wang Yang,Yushi Tan,Yisheng Ge,Yuxuan Xie,Yangyang Hao,Yingzhi Zhu,Yongfeng Li
The escalating proliferation of electronic devices has intensified electromagnetic pollution, driving urgent demand for efficient electromagnetic wave absorbing materials. Carbon-based absorbers are promising due to their lightweight and tunable dielectric properties, yet often suffer from poor impedance matching and a lack of magnetic loss. Herein, we develop a Fe 3 O 4 /nitrogen-doped porous carbon composite (Fe 3 O 4 /NPC) through a facile adsorption-calcination approach. By regulating the carbonization temperature, the content and configuration of nitrogen dopants in NPC are effectively controlled, which in turn governs the adsorption of Fe 3+ and the subsequent formation of Fe 3 O 4 nanoparticles during thermal reduction. It is found that pyrrolic nitrogen not only enhances dipole polarization relaxation but also promotes uniform loading of Fe 3 O 4 nanoparticles. The optimized Fe 3 O 4 /NPC exhibits excellent impedance matching and attenuation capacity, achieving a remarkable reflection loss of −53 dB and an effective absorption bandwidth of 5.1 GHz at thin thickness of 1.82 mm. This performance surpasses the majority of previously reported magnetic carbon composites for EWA. Systematic electromagnetic analysis reveals that the superior performance originates from the synergistic effects of dielectric and magnetic losses, including interfacial polarization, defect-induced dipole relaxation, conductive loss, and magnetic loss. This work highlights the critical role of nitrogen configuration in mediating magnetic nanoparticle dispersion and presents a feasible strategy for designing lightweight and efficient EWA materials.
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Surfaces and Interfaces
·
2026
·
IF 6
Xingtong Yan,Yue Li,Qianhong Shen,Hui Yang
To overcome the challenges of agglomeration and the difficulty in achieving oriented alignment of hexagonal boron nitride nanosheets (BNNSs) in epoxy matrices, a magnetically responsive Fe 3 O 4 /BNNSs composite was successfully prepared. Fe 3 O 4 nanoparticles grown in situ on the BNNS surface impart magnetic responsiveness to the nanosheets, enabling their alignment under an external magnetic field, while the BNNSs themselves serve as the primary impermeable barrier filler. By applying a horizontal magnetic field during the curing stage, the nanofillers are driven to align parallel to the substrate, forming an ordered layered structure. Comprehensive characterization confirmed the in-situ growth of Fe 3 O 4 nanoparticles on the BNNS surface and demonstrated the composite’s strong superparamagnetic behavior. Performance evaluation revealed that the epoxy coating containing magnetically aligned Fe 3 O 4 /BNNS fillers (BFM/EP) exhibited the most superior overall properties. After 20 days of immersion in deionized water, the BFM/EP coating displayed a remarkably low water absorption of only 6.48%, compared with 19.28% for the pure epoxy coating, indicating significantly enhanced anti-permeability. Benefiting from the improved barrier performance, the BFM/EP coating also retained the highest adhesion after 14 days of salt-spray exposure. Long-term electrochemical impedance spectroscopy (EIS) over 40 days further demonstrated that BFM/EP exhibited the highest coating resistance (1.93 × 10 8 Ω·cm 2 ), the lowest coating capacitance (1.99 × 10 -10 F·cm 2 ), and the largest low-frequency impedance modulus (1.69 × 10 10 Ω·cm 2 ). These results indicate that the dominant enhancement in corrosion protection originates from the magnetic-field-induced parallel alignment of high-aspect-ratio BNNSs, while Fe 3 O 4 functionalization mainly enables magnetic manipulation and contributes to improved filler dispersion. The resulting ordered filler network effectively enhances the tortuous diffusion pathway for corrosive species, leading to superior impermeability and long-lasting corrosion protection.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Xiaojun Zhou,Wenwen Yang,Chunmei Zeng,Hejun Gao,Yunwen Liao,Kunpeng Song
·N-doped Fe 3 O 4 @CNTs with Fe-Nx and oxygen vacancies was fabricated for efficient ORR electrocatalysis. • The catalyst shows onset potential of 0.87 V and superior stability toward oxygen reduction reaction. • Zinc–air battery delivers 173.90 mW·cm −2 power density and stable running for 280 h. • Synergy of oxygen vacancies and Fe-Nx sites boosts ORR activity and structural stability. A composite catalyst consisting of Fe 3 O 4 nanoparticles coated with nitrogen-doped carbon nanotubes (Fe 3 O 4 @CNTs) was synthesized via in situ pyrolysis using heme-modified CNTs. Benefiting from the CNT coating and oxygen vacancies, the catalyst exhibits a half-wave potential of 0.88 V for oxygen reduction in alkaline media, with stability surpassing commercial Pt/C. In zinc-air batteries, it achieves a power density of 173.90 mW·cm −2 and maintains stable operation over 280 h. Experimental and theoretical studies reveal that the CNT coating provides a 3D conductive network, prevents Fe 3 O 4 agglomeration, and modulates the electronic structure of the active-sites via Fe–N interactions. Meanwhile, abundant oxygen vacancies are introduced into Fe 3 O 4 , optimizing O 2 adsorption and reducing reaction barriers. This work offers new insights into the design of iron-based oxide electrocatalysts with high activity and durability for renewable energy applications.
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MOLECULES
·
2026
·Vol. 31
·期 9
·1463
·
IF 5.1
Chang Chen,Yaohui Xu,Qin Wang,Zhao Ding
Achieving tunable morphologies of Fe3O4using a single iron source remains challenging, mainly due to the oxidation of Fe2+and the difficulty of regulating anisotropic crystal growth. In this study, Fe3O4was synthesized via a one-step hydrothermal method using FeSO4·7H2O as a single iron source in a TEA–NaOAC synergistic system. The effects of hydrothermal temperature, additive ratio, and dosage were systematically investigated. Time-dependent and TEA dosage-dependent experiments were also designed to elucidate the morphological evolution mechanism. The results show that pure-phase Fe3O4can be obtained with TEA alone, as TEA controls the release rate of Fe2+and inhibits its oxidation. However, the synergistic addition of NaOAC provides a mild alkaline environment that not only maintains phase purity but also further promotes anisotropic crystal growth and enables a broader morphological tunability. By tuning the reaction conditions, a systematic morphological evolution from flower-like to cubic, regular octahedral, and polyhedral structures was achieved. Time-dependent experiments reveal a complete dissolution–recrystallization pathway from flower-like to cubic structures. TEM and SAED confirm that the polyhedral particles are micrometer-sized single crystals. Under optimized conditions (160 °C, TEA 3 mL, NaOAC 26 mmol), the polyhedral Fe3O4exhibits a saturation magnetization of 91.4 emu/g, approaching the bulk theoretical value (92 emu/g), and a coercivity of approximately 100 Oe. This study provides new experimental evidence for morphology regulation of Fe3O4using a single iron source, achieving high saturation magnetization close to the bulk theoretical value and moderate coercivity suitable for non-biomedical applications.
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PubMed
高影响因子
NANO
·
2025
·
IF 1.1
Peixuan Zou,Yusong Pan,Kuen-Song Lin,Wei-Chin Tsai,Yinghai Xie,Wenjie Luo,Run Huang,Xiuling Lin
The use of nanocarriers with combined photothermal and chemotherapeutic methods has been widely accepted as a promising anti-tumor treatment strategy. Leveraging the tumor-specific microenvironment, these nanocarriers enhance therapeutic outcomes. Our research developed an innovative drug carrier platform, which was composed of the Metal-Organic Framework (MOF) HKUST-1 as a drug carrier and the Fe 3 O 4 nanoparticles as a photothermal functional phase. This novel carrier demonstrated an impressive drug loading rate of 110% for Doxorubicin (DOX), suggesting a high capacity for drug delivery. Additionally, the as-prepared nanocarrier also displayed excellent photothermal conversion capability, which can efficiently convert light into heat under near-infrared light with 980 nm irradiation, thus utilizing photothermal therapy for tumors. The release mechanism of pH sensitivity of the carrier expedited drug release under acidic conditions, aligning with the tumor microenvironment. Biocompatibility assays confirmed the excellent compatibility of Fe 3 O 4 @HKUST-1 with normal tissue cells. While photothermal therapy alone successfully induced apoptosis in tumor cells, the treatment’s efficacy requires improvement as cell viability remained at 80%. Conversely, combining chemotherapy with photothermal therapy decreased cell viability to 30%, thereby effectively inhibiting proliferation. In sum, the Fe 3 O 4 @HKUST-1 drug delivery system exhibits significant potential in medical applications due to its dual-therapy approach.
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COMPOSITES COMMUNICATIONS
·
2026
·
IF 8.6
Wei Zhang,Zhiqin Zhao,Lanlan Wei,Kai Zhang,Min Shi,Yang Chen,Lijun Wang
Microcellular polymer composites with an excellent conductivity are greatly desired for electromagnetic interference (EMI) shielding applications, but it still remains a great challenge to fabricate conductive composite foams with intelligent EMI shielding performance at minimal amounts of functional filler. Herein, a novel and facile technology is developed for in-situ creating poly(3,4-ethylenedioxythiophene)/ferroferric oxide (PEDOT/Fe 3 O 4 ) in the closed-cells of bulk epoxy foams without sacrificing the lightweight and mechanical properties. Via vapor phase polymerization of EDOT monomer using FeCl 3 as oxidant and followed by alkali treatment, the in-situ generated PEDOT/Fe 3 O 4 composites densely pack at the inner walls of closed-cells to form the highly conductive islands. These islands are linked by the nanofiller/PEDOT conductive chains in cell walls, thus constructing the unique “island-chain” segregated conductive nanostructure. This architecture endows the resultant composite foams with good conductivity, outstanding EMI shielding effectiveness, highly effective absorbance (A eff ), epsilon-negative (ε′ < 0) response and considerable compressive strength, showcasing obvious advantages as compared to conventional design in open-cells. Moreover, these functional composite foams display a repeatably pH-sensitive EMI shielding performance with a significant difference of 14 dB, providing a potential approach for intelligent EMI shielding.
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