MATERIALS CHEMISTRY AND PHYSICS
·
2026
·
IF 5.2
Dong Wang,Sijia Guo,Baisen Song,Zizhou Li,Xiangdong Liu
BCNO@Fe 3 O 4 core-shell composites were constructed using corn silk-derived biomass carbon as a template. • BFeO-2 achieves an RLmin of −56.5 dB at 7.23 GHz and a 2.5 GHz EAB in the low-frequency region. • Fe 3 O 4 regulation balances dielectric-magnetic loss, impedance matching, and thermal conduction. The integration of high-power electronic devices has intensified both electromagnetic interference and heat accumulation, creating an urgent need for bifunctional materials with efficient microwave absorption and thermal management capabilities. In this work, a C- and O-doped boron nitride ceramic framework (BCNO) was first prepared using corn silk-derived biomass carbon as a template, followed by the deposition of Fe 3 O 4 on the BCNO surface through a solvothermal process to construct BCNO@Fe 3 O 4 (BFeO) core-shell composites. By tuning the Fe 3 O 4 content, the effects of composition and microstructure on electromagnetic response and heat conduction were systematically investigated. The results showed that the optimized samples exhibited strong microwave absorption in the low-frequency region. BFeO-2 delivered a minimum reflection loss (RL min ) of −56.5 dB at 7.23 GHz with an effective absorption bandwidth (EAB) of 2.5 GHz (5.8-8.3 GHz), while BFeO-3 achieved a RL min of −58.3 dB at 6.34 GHz. The enhanced absorption originated from the synergistic effects of interfacial polarization, dipolar polarization, magnetic loss, and multiple reflection/scattering enabled by the core-shell heterostructure. In addition, BFeO also showed a significant thermal conduction enhancement in epoxy. At a filler loading of 30 wt%, the thermal conductivity (TC) of the composites reached 1.62 W m −1 K −1 , corresponding to increases of 540.3% compared with pure epoxy. This study demonstrates that rational regulation of the BCNO/Fe 3 O 4 heterostructure is an effective strategy for developing microwave absorbers with integrated thermal management functionality.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·Vol. 65
·期 34
·18145-18158
·
IF 3.9
He Yiruo,Su Weiyi,Song Jianheng,Liu Qidong,Wang Na,Yu Xiong,Wang Honghai
The
combination of immobilized enzymes and microreactors offers
great advantages in green biomanufacturing. However, improving the
catalytic loading and reusability of immobilized enzymes remains a
challenge. This study developed a magnetically separable immobilized
enzyme system for continuous-flow biocatalysis. Candida antarctica lipase B (CALB) was covalently immobilized onto polydopamine-modified
Fe 3 O 4 nanoparticles to prepare a magnetic nanoimmobilized
enzyme (CALB@PNMNs). Compared to free enzymes, CALB@PNMNs exhibited
enhanced stability in organic solvents and storage stability. CALB@PNMNs
microreactor was constructed, with CALB@PNMNs immobilized on its inner
walls by an external magnetic field. This layer of magnetic particles
allows for the convenient recovery and reuse of the catalyst by removing
the applied magnetic field. After optimizing the immobilization process,
the actual CALB loading per unit area was 0.30 mg/cm 2 ,
and the adsorption yield reached 86.89%. The microreactor was applied
to the transesterification of n -butanol and ethyl
acetate, with the optimal conditions identified as an alcohol–ester
ratio of 1:3, a total flow rate of 10 μL/min, and a reaction
temperature of 60 ° C, yielding an n -butanol
conversion of 63.72%. After short-term continuous operation for 6
h, the microreactor retained 87.63% of the enzyme adsorption capacity
and CALB@PNMNs maintained a n -butanol conversion
above 50% after 8 reuse cycles. This work has established a stable
magnetically controlled immobilized enzyme microreactor (IMER) platform,
offering application potential for continuous-flow bioprocesses.
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RSC Advances
·
2026
·Vol. 16
·期 27
·24454-24464
·
IF 6.1
Xinyu Cheng,Zhihua Xu,Chenxi Guo,Ting Zhou,Alang Zhang,Feng Shi
In this work, a lanthanum-doped Fe3O4@polydopamine (PDA) core–shell composite was prepared via a hydrothermal method. XPS depth profiling revealed that La is uniformly distributed throughout the Fe3O4 particles, with a constant La/Fe ratio from the surface to 60 nm depth. The material exhibits superparamagnetic properties, enabling rapid magnetic separation within 30 s. Phosphate adsorption reaches equilibrium in 180 min, following pseudo-second-order kinetics (R2 > 0.999) and the Sips isotherm, with a maximum capacity of 123.44 mg P per g. XPS analysis revealed shifts in the La 3d spectra consistent with inner-sphere La–P complexation, providing supportive evidence for chemisorption. The adsorbent retained >85% of its capacity after five cycles using 1 M NaCl as the eluent. Negligible La leaching (<0.01 µg L−1) and low aquatic toxicity to Chlorella sp. further support its environmental safety. These results demonstrate that 2.5%La-Fe3O4@PDA provides a robust, magnetically separable, and reusable platform for phosphate removal, offering deeper mechanistic insights into La-doping and PDA synergy in established magnetic core–shell systems.
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高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2026
·
IF 13.5
Xiaonan Liu,Zhi Lei,Maoxia Lu,Dongwei Ma,Chuan Wang,Zehong Wu,Daohai Zhang
Traditional electromagnetic shielding materials can no longer meet the rapidly growing demands of modern flexible electronic devices and advanced information technologies. Owing to their excellent flexibility, adhesion, stimuli responsiveness, and ease of processing and functional modification, hydrogels offer promising opportunities for developing flexible wearable electronic devices. In this study, PAM/CMC/Fe 3 O 4 @ZIF-67 multifunctional composite hydrogels were fabricated through a reverse-growth strategy combined with a one-pot polymerization method. First, flower-like Fe 3 O 4 microspheres were prepared via an ethylene glycol-assisted solvothermal method and subsequently coupled with ZIF-67 through a reverse-growth strategy to obtain the Fe 3 O 4 @ZIF-67 composite. Subsequently, the composites were introduced into a PAM/CMC-based three-dimensional network, forming a multifunctional hydrogel that integrates flexibility, high water content, and synergistic conductive–magnetic effects. The experimental results showed that the 3 mm-thick PCZF-2 hydrogels achieved an average EMI SE of 36.08 dB. It also exhibited a conductivity of 0.93 S m −1 , a compressive modulus of 398.0 kPa, a compressive strain of 64.1%, a water content of 625.72%, and a swelling ratio of 240.82%. The hydrogel also exhibited excellent adhesion capability and high sensitivity (GF = 1.40 within the strain range of 0–100%, R 2 = 0.995), enabling human–machine-interaction-friendly strain sensing. This study provides an effective strategy for constructing tough multifunctional materials with integrated electromagnetic interference shielding and strain-sensing functionalities. Functional Fe 3 O 4 @ZIF-67 composite fillers were constructed via a reverse-growth strategy and incorporated into a double-network composite hydrogel through a one-pot method. The synergistic effects of magnetic loss, dielectric loss, and multiple scattering induced by the fillers endow the material with excellent electromagnetic interference shielding performance. Meanwhile, the deformation-responsive conductive network enables highly sensitive human motion sensing, providing an effective pathway for the development of integrated flexible materials for electromagnetic protection and intelligent sensing. Download: Download high-res image (252KB) Download: Download full-size image
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RSC Advances
·
2026
·Vol. 16
·期 31
·28604-28618
·
IF 6.1
Na Qiang,Lihong Huang,Wenlong Zhang,Rouping Zheng,Yan Yu,Jiao Zou,Qingyun Tang,Yubo Zou,Jinyu Yang,Guocong Liu,Shuai Qiu,Shuo Tang
The design of magnetoactive hybrid scaffolds based on biocompatible piezoelectric polymers and magnetic nanoparticles (NPs) holds great promise for advanced bone tissue regeneration applications. In this study, electrospun magnetoactive poly(vinylidene fluoride-co-trifluoroethylene) [P(VDF-TrFE)] composite fibrous membranes doped with different concentrations of oleic acid-modified Fe3O4 (Fe3O4-OA) NPs were successfully fabricated via the electrospinning technology. The as-prepared P(VDF-TrFE)/Fe3O4-OA composite membranes exhibited a uniform fibrous morphology with an average fiber diameter of approximately 0.2 µm, and the piezoelectric crystalline β-phase was predominant. The homogeneous dispersion of Fe3O4-OA NPs endowed the composite fibrous membranes with typical ferromagnetic behaviour and tunable saturation magnetisation. In vitro biological evaluations confirmed the excellent biocompatibility of the composite membranes with bone marrow mesenchymal stem cells (BMSCs). CCK-8 assays indicated that the viability of BMSCs cultured on all composite membrane groups increased over time, and live/dead staining further verified that all composite membranes supported high BMSC viability. F-actin staining results revealed that BMSCs could effectively attach and spread on the composite membranes with well-developed cytoskeletal structures. Moreover, the osteogenic differentiation potential of the BMSCs on the composite membranes was systematically evaluated at the early, middle and late stages of osteogenic induction. Alkaline phosphatase (ALP) activity assays revealed that the composite membranes containing Fe3O4-OA NPs exhibited significantly elevated ALP activity compared with the pure P(VDF-TrFE) membrane, and RUNX2 immunofluorescence staining confirmed enhanced early osteogenic transcriptional activation in the BMSCs cultured on the Fe3O4-OA-doped composite membranes. Collectively, these findings suggest that the electrospun magnetic P(VDF-TrFE)/Fe3O4-OA composite fibrous membranes exhibit good cytocompatibility and support the osteogenic differentiation of BMSCs, indicating their potential as scaffold materials for bone tissue engineering.
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高影响因子
BIOMASS & BIOENERGY
·
2026
·
IF 7
Xinying Huang,Yi Gao,Rui He,Xiaobo Guo,Yanyu Zhang,Luyi Chang,Ke Pan,Yunhui Lei
Wastewater with a high concentration of chemical oxygen demand is a potential feedstock for biomethane production via anaerobic digestion (AD). However, the accumulation of volatile fatty acids often poses a significant bottleneck, inhibiting biomethane production efficiency. This study investigated the effects of Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs) and hydrophobic carbon cloth on AD performance. The addition of Fe 3 O 4 NPs increased the maximum methane production rate (MPR) by 19.6% compared to the control group without conductive materials supplementation (CK). Notably, Fe 3 O 4 NPs were first founded to significantly alleviate the inhibitory effect of hydrophobic carbon cloth on AD; on day 9, the MPR increased to 1.8-fold in the Fe 3 O 4 NPs group and to 1.3-fold in the co-addition group (Fe 3 O 4 NPs and carbon cloth), compared to the carbon cloth group alone. Additionally, Fe 3 O 4 NPs decreased cytochrome c concentration by 40.2% and increased the relative abundance of Clostridium_sensu_stricto_1 in the suspended sludge to 1.3 times compared with the CK. In the carbon cloth biofilm, Fe 3 O 4 NPs enriched the populations of Anaerolineales (2.1-fold increase) and Methanosaeta (1.1-fold increase), and stimulated bacterial metabolic pathways such as membrane transport and carbohydrate metabolism compared to the carbon cloth group. This study helps to elucidate the mechanisms by which Fe 3 O 4 NPs supplementation accelerates the AD process.
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ACS Applied Nano Materials
·
2026
·
IF 5.8
Yuan Yanru,Wang Yanxiang,Peng Xu,Guo Jinghe,Zhang Dong,Xu Ziyi,Gao Peiyi,Wang Xueqi,Zhang Can,Zhao Minchen
Flexible electronic devices require
electromagnetic interference
(EMI) shielding materials that combine effective shielding, mechanical
flexibility, and controlled surface reflection. However, highly conductive
Ti 3 C 2 T x MXene nanosheet
networks often induce excessive electromagnetic reflection, limiting
electromagnetic wave penetration and subsequent attenuation. To address
this limitation, a thickness-direction asymmetric bilayer architecture
was designed to reduce front-surface reflection and regulate electromagnetic
power distribution, rather than relying only on strong reflection
for EMI shielding. The bilayer consists of a Fe 3 O 4 /MXene/WPU incident layer with lower apparent electrical conductivity
and a MXene/WPU backing layer with higher apparent electrical conductivity
to regulate electromagnetic wave propagation and suppress transmission.
Nanometer-thick Ti 3 C 2 T x MXene nanosheets and Fe 3 O 4 nanoparticles
were incorporated into waterborne polyurethane (WPU), and the asymmetric
Fe 3 O 4 /MXene/WPU–MXene/WPU bilayer film
was fabricated by vacuum-assisted filtration and hot pressing. The
optimized FMW-M 15 film exhibited an X-band total shielding
effectiveness of 30.8 dB at a thickness of 60.0 ± 0.9 μm,
together with a tensile strength of 31.3 MPa and an elongation at
break of 192.5%. Under Fe 3 O 4 /MXene/WPU-side
incidence, the reflection, absorption, and transmission coefficients
were 0.7964, 0.2028, and <0.001, respectively. Reversing the incidence
direction increased reflection and reduced absorption, confirming
the direction-dependent electromagnetic response.
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ACS Applied Nano Materials
·
2026
·
IF 5.8
Yue Wang,Long Zhang,Sijie Zhang,Shuyue Li,Xingyan Wang,Wenhao Liu,Feng Yang,Xueyi Liu,Yi Hao,Ruixia Gao,Sicen Wang,Jingang An
Bacterial infections pose a severe global health threat with rising mortality, driving the need for alternative therapies. Chemodynamic therapy (CDT), which converts endogenous H2O2 into lethal hydroxyl radicals (•OH) via Fenton reactions, offers a promising solution. Copper peroxide (CuO2) nanodots have recently attracted considerable research interest because of their capacity to generate H2O2. Despite this advantage, their practical use in antibacterial applications is severely limited by their poor stability. In this study, we developed a near-infrared (NIR)-triggered nanoplatform, LA-CP@Fe3O4, by encapsulating CuO2-loaded iron tetraoxide nanoparticles with the phase-change material lauric acid (LA). This system synergistically combines a Fe2+/Fe3+-Cu+/Cu2+ dual-metal catalytic network for enhanced •OH generation with NIR-triggered photothermal activation (a photothermal conversion efficiency of 39.21%), allowing spatiotemporally controlled therapeutic release while stabilizing CuO2 nanodots. In vitro, the platform achieved 99.9% bactericidal efficiency via self-supplied H2O2 and targeted ROS generation. In vivo, it exhibited excellent biocompatibility, accelerated wound healing with an 88.0% reduction in wound area by day 7, and effective NIR-triggered antibacterial activity. These results collectively establish a groundbreaking approach for precision antibacterial therapy with strong clinical translation potential.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Liuliu Zhong,Qisheng Hu,Changjian Li,Jing Ding,Chundong Zhang,Hui Wan,Lei Wang,Guofeng Guan
The hydrogenation of CO2 to produce α-olefins and other high-value chemicals plays a crucial role in energy transformation and sustainable low-carbon development. However, the CO2 hydrogenation pathway for α-olefin synthesis still encounters various challenges, such as limited CO2 conversion and low α-olefin selectivity. To tackle these issues, this study initially assessed the catalytic properties of iron-based catalysts with varying morphologies and particle sizes. The findings indicated that the spherical Fe3O4 catalysts with large specific surface area demonstrated high CO2 conversion (20.8%) and α-olefin selectivity (14.4%) To improve CO2 adsorption and facilitate carbon chain growth, K and Sr were introduced to modify the spherical Fe3O4 catalysts. The synergistic electronic and structural effects of K and Sr contributed to enhanced α-olefin formation. Experimental data revealed that, under reaction conditions of 340 °C, 2.5 MPa, and a space velocity of 5000 h–1, the optimized 5K10Sr/Fe3O4 microsphere catalyst achieved a CO2 conversion of 45.4%, C2+ selectivity of 68%, chain growth factor of 0.67, and LAO (linear α-olefins in C4+ products) selectivity of 53.6%.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Shuyang Sun,Mengdi Yao,Yu Gao,Ping Wang,Chengke Wang
A colorimetric method for fish freshness monitoring was developed. After coating magnetic Fe 3 O 4 nanoparticle with zeolitic imidazolate framework-8 (ZIF-8), the horseradish peroxidase (HRP) was adsorbed onto it with high efficiency due to the large surface area of ZIF-8, the mesoporous SiO 2 was further decorated onto the Fe 3 O 4 @ZIF-8@HRP to form Fe 3 O 4 @ZIF-8@HRP@SiO 2 nanostructure, in order to minimize the release of HRP, and enhance the stability and catalytic activity of HRP. The morphology, elemental composition, surface functional groups of Fe 3 O 4 @ZIF-8@HRP@SiO 2 were characterized by transmission electron microscopy, X-ray diffraction, energy dispersive spectroscopy, Fourier transform infrared spectroscopy. Hypoxanthine (HX), which formed due to the degradation of adenosine triphosphate in fish, can be oxidized by xanthine oxidase and generated H 2 O 2 intermediate. Thereafter, in the presence of H 2 O 2 , HRP within Fe 3 O 4 @ZIF-8@HRP@SiO 2 nanostructure would catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to a blue product of TMBox, allowing an indirect colorimetric sensing of HX content. Under optimal conditions, HX was selectively and sensitively detected in the range of 0–100 μM, with a detection limit of 0.133 μM. Finally, the proposed method was applied to determine the HX content in grass carp continuously stored at 4 °C and 30 °C for 96 h.
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高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2026
·
IF 5.2
Mengwen Hu,Piyu Gong,Jumiao Shi,Shuo Tao,Haibo Li,Suyuan Zeng,Lei Wang
In this work, Zn 3 (VO 4 ) 2 @Fe 3 O 4 composites were constructed and utilized as the anode materials for lithium-ion batteries. The formed Zn 3 (VO 4 ) 2 @Fe 3 O 4 composites with a Zn 3 (VO 4 ) 2 /Fe 3 O 4 weight ratio of 1:1 and 1:2 delivered the discharge capacities of 925.6 and 684.4 mA h g −1 respectively. The introduction of Fe 3 O 4 enhances the electronic/ionic transport and structural stability of the Zn 3 (VO 4 ) 2 microstructure, improves the charge transfer kinetics and pseudocapacitive behavior and stabilizes the cycling performance, thereby boosting the lithium storage capacity of the Zn 3 (VO 4 ) 2 based electrodes.
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高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2016
·
IF 0.963
Nanan Liao,Zhisen Liu,Wenjing Zhang,Shougui Gong,Daming Ren,Linjiao Ke,Kai Lin,Hao Yang,Fuan He,Hongliu Jiang
In this work, a novel Fe3O4/graphene oxide (GO) hybrid was prepared and its removal ability of cationic methylene blue dye from water was investigated. To improve the dispersability of Fe3O4/GO hybrid in water, GO was first modified by polyethylene glycol (PEG) via a click approach before deposition of Fe3O4 nanoparticles onto its surface. The successful modification of GO surface and the deposition of Fe3O4 nanoparticles were confirmed by transmission electron microscopy directly. The saturation magnetization of the resultant Fe3O4/GO hybrid is 7.8 eum/g. The adsorption capacities of Fe3O4/GO hybrid for methylene blue at 35 and 60°C were as high as 96.05 and 120.05 mg/g, respectively. Moreover, the Langmuir, Freundlich, and Temkin models are used to investigate the isothermal adsorption behavior of Fe3O4/GO hybrid.
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