RSC Advances
·
2019
·Vol. 9
·期 65
·37870-37881
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IF 3.049
Jia Wang,Jian Jiao,Guangmei Sun,Kai Yuan,Ziyi Guan,Xinyi Wei
Graphene oxide (GO) and carbon nanotubes are promising microwave-absorbing materials. Herein, ferroferric oxide (Fe3O4)/multiwall carbon nanotube (MWCNT) and Fe3O4/GO hybrid buckypapers with excellent flexibility and manoeuvrability were coated on the surface of an epoxy substrate to fabricate microwave-absorbing composites. Fe3O4/GO buckypapers show a unique layered structure that differs from the complex network structure of Fe3O4/MWCNT buckypapers. Therefore, the Fe3O4/GO buckypapers exhibit lower tensile strength and toughness than the Fe3O4/MWCNT buckypapers, and the minimum electromagnetic reflection loss of Fe3O4/GO buckypapers is higher than that of Fe3O4/MWCNT buckypapers. Further, Fe3O4/GO buckypapers have a wider effective absorption-frequency band than Fe3O4/MWCNT buckypapers at 2.0–18.0 GHz. Although the mechanical properties of epoxy resin composites coated with Fe3O4/MWCNT or Fe3O4/GO buckypapers show a slight deterioration in comparison with those of the epoxy resin substrate, both buckypapers exhibit improved microwave-absorption performance compared with the epoxy resin substrate.
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高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 16
·8793-8799
·
IF 7.443
Wenling Gu,Xi Deng,Xiaofang Jia,Jing Li,Erkang Wang
Herein, branched poly-(ethylenimine) functionalized graphene/iron oxide hybrid (termed as BGNs/Fe3O4) was chosen as an efficient support material to load AuPt alloy nanoparticles for constructing a multifunctional nanocatalyst via a simple and controlled self-assembly approach. BGNs/Fe3O4 as a nanocarrier made the AuPt alloy nanoparticles uniformly distributed on the surface of BGNs/Fe3O4. The obtained multifunctional nanocatalyst was characterized by high-resolution transmission electron microscopy (HRTEM), energy dispersive X-ray (EDX) spectroscopy, UV-Vis spectroscopy and X-ray photoelectron spectroscopy (XPS). The nanocatalyst exhibited favorable water solubility, excellent dispersion, good stability, superparamagnetism and particularly high catalytic activity for reducing 4-nitrophenol (4-NP). Furthermore, by tuning the composition of the nanoalloy nanoparticles of the multifunctional nanocatalyst, a normalized rate constant of about 17.99 mg−1 s−1 was achieved, which was superior to most of the Au or Pt based nanocatalysts reported in recent years. In addition, it was proved that the magnetic Fe3O4 nanoparticles not only ensured the reuse of the nanocatalyst, but also significantly improved the catalytic activity. Thanks to the favorable catalytic activity, the obtained multifunctional nanocatalyst may hold great potential for various catalytic processes.
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高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Qianhui Wu,Rongfang Zhao,Xiue Zhang,Wenlong Li,Renhua Xu,Guowang Diao,Ming Chen
Freestanding binder-free electrodes, as a new generation of electrode material, can effectively improve the energy density of lithium-ion batteries (LIBs). In this paper, novel structured Fe 3 O 4 /C composite nanofibers are successful synthesized by a simple electrospinning method followed by a thermal treatment process. The composite nanofibers have the unique internal voids between Fe 3 O 4 nanoparticles and carbon matrix. The Fe 3 O 4 /C nanofibers film with good flexibility and excellent electrical conductivity can be directly used to fabricate half-cell without any current collector, binder and additional conductive agent. As anode material for LIBs, the Fe 3 O 4 /C composite nanofibers deliver high reversible capacity (762 mA h g −1 at 0.5 A g −1 after 300 cycles). The results show that the internal voids in flexible Fe 3 O 4 /C composite nanofibers effectively buffer volume expansion of Fe 3 O 4 in lithium ion intercalation/deintercalation process and avoid the fracture of the nanofibers, which retain the structural integrity and improve the cycling stability of electrode. Therefore, the design and synthesis strategy of flexible nanofibers film are prospective for applications in next-generation flexible LIBs.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yu Gao,Daohong Zhang,Lihong Su,Chengke Wang
Synergistic Fe 3 O 4 @TCPP-Ru nanozyme with enhanced peroxidase and oxidase-like activity. • Dual-enzyme cascade for sensitive hypoxanthine detection. • Accurate shrimp freshness monitoring versus HPLC. • Portable hydrogel-smartphone platform for hypoxanthine on-site detection. The quality and safety of aquatic products are intrinsically linked to their freshness. Hypoxanthine (HX), a primary biochemical metabolite of adenosine triphosphate, serves as a crucial biomarker for early spoilage and an indicator of aquatic food freshness. In this study, a reliable, sensitive, and convenient colorimetric sensing platform was developed for HX detection based on a dual-enzyme cascade system involving xanthine oxidase and a novel peroxidase-mimicking nanozyme, Fe 3 O 4 @TCPP-Ru, which was synthesized by modifying Fe 3 O 4 nanoparticles with tetra(4-carboxyphenyl)porphyrin (TCPP) and in situ anchoring Ru nanoclusters, resulting enhanced adsorption capacity and superior peroxidase-like activity. During detection process, HX is oxidized by XOD to produce H 2 O 2 , which triggers the Fe 3 O 4 @TCPP-Ru catalyzed oxidation of 3,3′,5,5′-tetramethylbenzidine substrate into a blue-colored product, enabling the colorimetric detection of HX. Under optimal conditions, HX can be detected in a linear range of 2.5–150 μM with a limit of detection of 1.72 μM. This method was also applied to monitor shrimp freshness, showing satisfactory recoveries (92.95%–110.69%) and good agreement with HPLC analysis. Furthermore, an integrated hydrogel-assisted colorimetric sensor was developed for smartphone-based point-of-care testing, allowing for rapid, visual, and instrument-free quantification of HX in shrimp samples stored in different temperatures and time. Our proposed Fe 3 O 4 @TCPP-Ru platform offers a promising strategy for on-site food safety monitoring. Download: Download high-res image (194KB) Download: Download full-size image
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高影响因子
Journal of Materials Chemistry C
·
2026
·
IF 5.1
Xuanxuan Huang,Yaohan Hu,Yi Luo,Muwei Shu,Zewen Yan,Jiaxi Zhang,Tao Sun,Lei Yang,Zhanjun Wu
With the rapid development of electronic devices and radar detection technology, there is an urgent need to develop highly efficient electromagnetic wave (EMW) absorption materials with a wide absorption bandwidth. Although graphene oxide (GO) has garnered significant attention in the field of EMW absorption due to its tunable dielectric properties, its high dielectric constant often leads to poor impedance matching and a single loss mechanism, making it difficult to achieve efficient EMW absorption. In this work, magnetic GO nanocomposites (Fe3O4@GO) were synthesized using a simple “one-pot method”. As expected, by adjusting the ratio of GO and Fe3O4, excellent electromagnetic wave absorption properties were achieved. It is worth noting that the minimum reflection loss of Fe3O4@GO70 at 8.28 GHz was −58.37 dB, corresponding to a thickness of 3.1 mm, while the effective absorption bandwidth at a thickness of 1.8 mm was 5.13 GHz (12.87–18 GHz). Additionally, the radar cross section (RCS) of Fe3O4@GO70 remained below −16.06 dB m2 across the entire −90° to 90° range, with a minimum RCS value of −29.04 dB m2 at 10°. Furthermore, the significant attenuation of electromagnetic waves is attributed to the synergistic effects of improved impedance matching, dielectric loss, and magnetic loss. Therefore, Fe3O4@GO composite materials show great potential as a high-performance electromagnetic wave absorber, and their simple preparation process makes them highly promising for scalable production.
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高影响因子
Biosensors-Basel
·
2026
·Vol. 16
·期 6
·337
·
IF 6.2
Jianjun Kang,Yuanchun Chen,Zongcheng Shu,Cuimin Wu,Fang Ke
Acid phosphatase (ACP) is a clinically important enzyme whose early-stage detection is hindered by its extremely low abundance, nonspecific tissue distribution, and rapid loss of activity under conventional analytical conditions. Herein, we present a target-driven in situ nanozyme synthesis strategy that enables rapid and ultrasensitive point-of-care testing (POCT) of ACP. In this approach, ACP catalyzes the hydrolysis of L-ascorbic acid 2-phosphate sesquimagnesium (AAPS), producing ascorbic acid (AA). The generated AA partially reduces Fe3+ions to Fe2+, thereby initiating alkaline co-precipitation and in situ formation of Fe3O4nanoparticles. Polyvinylpyrrolidone (PVP) stabilizes the nanoparticles and preserves catalytic accessibility, while their intrinsic magnetism allows for efficient magnetic separation to eliminate matrix interference. The resulting Fe3O4@PVP nanozymes display pronounced peroxidase-like activity, catalyzing hydrogen-peroxide-mediated oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB). Quantitative readout can be achieved using either spectrophotometric analysis or smartphone imaging. The sensing platform achieves a detection limit of 0.021 U/L within 40 min and demonstrates excellent sensitivity, selectivity, and operational robustness. Successful validation in human serum confirms its clinical feasibility, while smartphone-based imaging enables portable and low-cost quantification suitable for decentralized diagnostics. Collectively, this work establishes a generalizable paradigm for target-triggered nanozyme generation aimed at detecting low-abundance and labile biomarkers.
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PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2026
·
IF 8.4
Lingmiao Fang,Huamei Tong,Mengyue Qi,Cheng Ye,Zhanpeng Fu,Yingxue Cui,Jianjun Zhu,Di Li,Deli Jiang
The introduction of a dual-reaction coupling mechanism that simultaneously integrates ethylene glycol oxidation reaction (EGOR) and hydrogen evolution reaction (HER) on two electrodes to selectively produce the target product is of great importance. By precisely controlling the composition and electronic structure of the catalyst, this study produced catalytic materials with specific morphologies, achieving long-term stability; furthermore, by integrating a water electrolysis strategy, the research simultaneously achieved low energy consumption and high Faradaic efficiency. The Ni 4 Mo/Fe 3 O 4 catalyst achieves outstanding EGOR activity with a current density of 50 mA cm −2 at 1.42 V vs . RHE and a Faraday efficiency of 97% for formate production. For HER, it exhibits a low overpotential of 60 mV at 10 mA cm −2 and a Tafel slope of 67.46 mV dec −1 , surpassing most non-precious metal catalysts. Drawing on theoretical calculations, it is the electron coupling at the heterointerface and synergistic interactions between Ni and Mo sites that optimize the reaction pathway and lower the reaction energy barrier, thereby explaining the superior performance of Ni 4 Mo/Fe 3 O 4 . The work establishes interfacial engineering as a viable strategy for developing advanced bifunctional electrocatalysts, thereby addressing PET waste management and clean energy production sustainably.
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高影响因子
ACS Applied Bio Materials
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2026
·
IF 5.6
Yingze Li,Jibin Zheng,Chang Chen,Zhenguang Li,Yu Cheng
Successful tissue remodeling following biomaterial implantation requires adequate tissue integration, which is often compromised by macrophage-mediated foreign body responses and persistent inflammation. Developing biomaterials that actively modulate macrophage behavior via biophysical and biochemical cues holds significant promise for tissue engineering. Here, we present a magneto-actuated polyelectrolyte scaffold platform, where antioxidative lignin@Fe3O4 nanoclusters are noncovalently anchored onto chitosan/chondroitin sulfate scaffolds. Upon exposure to a dynamic magnetic field, the nanoclusters generate interfacial microvibrations, delivering dynamic mechanical stimuli to macrophages while simultaneously scavenging reactive oxygen species via their intrinsic antioxidative activity. This mechano-chemo coordinated modulation effectively induces macrophage polarization from the M1 to M2 phenotype, as evidenced by significantly downregulated pro-inflammatory markers and upregulated anti-inflammatory markers in vitro. As a proof of concept, the subcutaneous implantation of scaffolds under the dynamic magnetomechanical actuation demonstrates improved tissue integration, characterized by reduced inflammation and enhanced extracellular matrix deposition. This platform offers an approach for promoting biomaterial adoption and tissue remodeling through spatiotemporally coordinated mechano-chemo modulation.
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PubMed
高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Qingyuan Song,Jinshou Yao,Liujun Jin,Peiyang Gu,Ye Wang,Ping Liu,Congping Chen,Guohong Dai
Dibutyl phthalate (DBP), a ubiquitous plasticizer pollutant, poses severe risks to environmental and human health, yet its high chemical stability makes valorization highly challenging. Herein, we report a one-pot, mild, and green strategy that directly upcycles DBP as an organic ligand to construct a ferroferric oxide functional Ni-based MOF framework nanocomposite (Fe3O4-Ni-MOF(DBP)) on nickel foam (NF), enabling the simultaneous detoxification of DBP and fabrication of a high-performance electrocatalyst. The in-situ integration of Fe3O4 nanoparticles with the Ni-MOF(DBP) endows the hybrid catalyst with accelerated charge-transfer kinetics, enhanced electrical conductivity, and abundant accessible active sites, leading to remarkable bifunctional activity for overall water splitting. In an alkaline electrolyte, Fe3O4-Ni-MOF(DBP)/NF exhibits outstanding bifunctional electrocatalytic performance, delivering low overpotentials of 233 mV for the OER and 42 mV for the HER at 10 mA cm -2 , along with excellent durability over continuous operation exceeding 40 h. In-situ Raman analysis reveals that the superior catalytic performance of Fe3O4-Ni-MOF(DBP)/NF is attributed to the dynamic reconstruction of surface metal sites into active (oxy)hydroxide intermediates. This work presents an innovative strategy for the valorization of toxic plastic pollutants, thus advancing the cross integration of environmental remediation and clean energy technologies.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Qinhong Yin,Sanchun Xu,Linyan Tang,Lihua Yang,Dezhi Yang,Jianhua Lv
A Fe 3 O 4 -VB 2 @CeO 2 ternary nanozyme was designed for METH detection. • Selective recognition of METH over HER/MOR via –NH and electrostatic attraction. • The sensor shows a low LOD of 3.4 ng mL −1 and a wide linear range. • It enables on-site colorimetric detection in serum with good specificity. Selective detection of methamphetamine (METH) over other illicit drugs is essential for forensic analysis and clinical screening, yet conventional methods are expensive, complex, and unsuited for on-site use. Herein, we developed a colorimetric platform based on a Fe 3 O 4 -VB 2 @CeO 2 ternary composite nanozyme for specific METH recognition. The nanozyme was synthesized via a two-step solvothermal method, where Fe 3 O 4 acts as the magnetic core, riboflavin (VB 2 ) serves as an electron mediator, and CeO 2 provides abundant catalytic active sites. Mechanistic studies (FT-IR, XPS, Zeta potential) suggest that METH is adsorbed onto the nanozyme surface through a combination of electrostatic interactions and other non-covalent forces, potentially including hydrogen bonding and π–π stacking interactions. This adsorption appears to modulate the surface chemistry and interfacial electron transfer dynamics, which may contribute to the suppressed generation of hydroxyl radicals (·OH) and the reduced peroxidase (POD)-like activity of the nanozyme. Under optimized conditions, the colorimetric signal shows an excellent linear relationship with the logarithm of METH concentration from 0.005 to 12 μg/mL, with a detection limit of 3.4 ng/mL. The sensor exhibits high specificity for METH, with negligible response to heroin (HER) or morphine (MOR), and shows negligible interference from various metal ions, amino acids, metabolites, and serum components. This work presents a visual strategy for on-site rapid METH detection and offers a plausible mechanistic interpretation of nanozyme inhibition based on indirect evidence. Download: Download high-res image (339KB) Download: Download full-size image
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2026
·Vol. 33
·期 8
·337
·
IF 3.5
Wang Kai,Li Aiyuan,Zhou Xiaoyan,Yu Shibeike,Chen Bifen,Sun Xiangdong,Zhang Chenyang
Congo red (CR) is a representative benzidine-based anionic azo dye with high toxicity, carcinogenicity, and poor biodegradability, posing substantial threats to human health and aquatic ecosystems. Therefore, its effective removal from wastewater remains a major environmental challenge. To address this, magnetic Fe 3 O 4 @SiO 2 @PPy-CTAB composite microspheres (PPy: polypyrrole; CTAB: cetyltrimethylammonium bromide) were fabricated using a hydrothermal technique in combination with surface modification and in-situ polymerization. The composite was systematically examined using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), vibrating sample magnetometry (VSM), and X-ray photoelectron spectroscopy (XPS), showing a well-defined core-shell framework, with a specific surface area (SSA) of 52.96 m 2 /g, a saturation magnetization of 42.8 emu·g − 1 , and a positively charged surface as a result of CTAB modification. Under optimal conditions (pH = 5, Fe 3 O 4 :CTAB mass ratio = 1:1.5), the CR adsorption capacity reached a maximum of 612.68 mg/g. Kinetic, isothermal, and thermodynamic analyses indicated that the adsorption process was best described by the pseudo-second-order kinetic model and the Langmuir isotherm model, suggesting a spontaneous, endothermic, and entropy-driven chemisorption process. The adsorption mechanism was primarily governed by electrostatic interactions, synergistic π-π stacking, and hydrogen bonding. After ten desorption-adsorption cycles, the adsorption capacity retained 87.1% of its initial adsorption capacity, demonstrating good reusability. The Fe 3 O 4 @SiO 2 @PPy-CTAB composite demonstrates high CR adsorption capacity (612.68 mg/g) and good reusability (87.1% retention after 10 cycles), making it a promising candidate for magnetic separation-based dye wastewater treatment. However, the use of CTAB and organic solvents limits the designation as “green”, and real-world validation is needed before practical application.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yishu Cai,Zhou Shi,Haojie Zhang,Lin Deng
A hierarchical PEG-PA/Fe 3 O 4 @PNF composite membrane was fabricated for aged nanoplastics removal. • Synergistic surface sieving and depth adsorption achieve 99.89% removal of aged nanoplastics. • Fe 3 O 4 provides strong coordination sites for aged nanoplastics. Aged nanoplastics, characterized by their small size, abundant oxygen-containing functional groups, are high colloidal stability. These features make them difficult to remove by conventional membrane processes. Efficient removal usually requires membranes with very small pore sizes. This requirement causes a severe permeability and selectivity trade-off. Herein, a hierarchical PEG-PA/Fe 3 O 4 @PNF composite membrane was rationally engineered via electrospinning coupled with interfacial polymerization to achieve efficient removal of aged polystyrene nanoplastics (PSNPs). The membrane features a three-layer architecture consisting of a PEG-modified polyamide (PEG-PA) selective layer, a Fe 3 O 4 -loaded polyacrylonitrile nanofibrous (Fe 3 O 4 @PNF) adsorption layer, and a nonwoven support, enabling the integration of surface sieving and depth adsorption within a single membrane. PEG modification markedly improved surface hydrophilicity, reducing the water contact angle from 28.07° to 9.84%. As a result, water flux increased by 54.2% while simultaneously enhancing antifouling performance. Meanwhile, Fe 3 O 4 nanoparticles introduced abundant adsorption sites that effectively captured aged PSNPs through specific coordination interactions. Density functional theory (DFT) calculations further supported this proposed mechanism. Benefiting from the synergistic coupling of selective sieving and adsorption, the optimized membrane achieved an aged PSNP removal efficiency of 99.89% while maintaining a water flux of approximately 1142–1059 L m −2 h −1 at 0.4 MPa (the pure-water flux is 1199 L m −2 h −1 under the same pressure). Moreover, the membrane maintained a high removal efficiency under neutral and alkaline conditions (pH 7–11), exhibited good tolerance toward common inorganic ions except phosphate, and demonstrated satisfactory reusability. This study presents an effective strategy for integrating selective separation and targeted adsorption into thin-film composite membranes. The proposed design also provides new insights into the efficient remediation of aged nanoplastics with broad size distributions in complex aqueous environments.
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高影响因子
危险品化学品经营许可证（带存储）