ACS Applied Nano Materials
·
2024
·
IF 5.3
Jia Deng,Shaoge Fu,Yifan Zhong,Ming Jiang,Tao Chen,Haili Zhao
Photonic crystal (PC) hydrogels with unique micro/nanostructures have excellent prospects in many fields, such as sensing, displays, anticounterfeiting, information encryption, and adaptive camouflage. Herein, magnetic core–shell Fe3O4/SiO2 nanoparticles with a controlled size were synthesized, followed by PC hydrogels of arbitrary structures that were fabricated via the magnetically inducing self-assembly of magnetic nanoparticles in the poly(ethylene glycol) diacrylate (PEGDA) pregel solution and a subsequent digital micromirror device (DMD)-based UV polymerization process. By controlling the size of nanoparticles and magnetic field intensity, various PC hydrogel patterns with tunable structural colors were fabricated. Combining magnetic field control with DMD-based light modulation, high-throughput preparation of structural color PC hydrogels was achieved. Furthermore, the Fe3O4/SiO2 nanoparticles were assembled into poly(2-hydroxyethyl methacrylate) (PHEMA) with solvent responsiveness. Interestingly, the obtained PC hydrogels could swell in ethanol, resulting in a change in the structural color. Meaningfully, a dual-component PC hydrogel consisting of a PEGDA pattern and a PHEMA background was fabricated, and the invisible pattern in the initial state could be displayed and hidden through cyclic exposure to ethanol and ethylene glycol. The presented strategy for constructing the PC hydrogels from Fe3O4/SiO2 nanoparticles could provide valuable insights for the development of intelligent structural color materials, which exhibit significant potential in applications such as information storage, visual sensing, and anticounterfeiting.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2024
·
IF 5.3
Xin Liu,Xuexue Xu,Qiushi Li,Wenjia Wang,Yifan Lv,Yujie Qiang,Sheng Wu
The core-shell structural Fe 3 O 4 @MBT-LDH was synthesized via the ion exchange method, with MBT (2-mercaptobenzothiazole) inhibitor ions intercalated lamellar ZnAlCe-LDH attaching closely to the Fe 3 O 4 microspheres surface. The morphology, composition, structure, and magnetic properties of the composite were measured by transmission electron microscope, X-ray diffraction, Fourier transform infrared spectra, and vibrating sample magnetometer . The release behavior of MBT ions and corrosion inhibition performance of the Fe 3 O 4 @MBT-LDH under “no MF” (without an external magnetic field) and “MF ON” modes (under an external magnetic field) were measured by UV–vis spectroscopy, electrochemical tests, scanning electron microscopy, and X-ray photoelectron spectrometer (XPS). Calcinating the composite after the release test and redispersing the sintered products in MBT ions-containing solution, the composite was reestablished. Results showed that the Fe 3 O 4 @MBT-LDH possessed moderate MBT loadings amount (12.0%) and presented strong superparamagnetic properties with saturation magnetization ( M s) of 27.6 emu⋅g −1 . The release behavior of the MBT − from the composite was sustainable and could be further slowed down by using an external magnetic field with changing the release mechanism. The release curve reached equilibrium with a longer time of 48 h and a lower release amount of 57.0% under MF ON mode than that of no MF mode with a time of 7 h and a release amount of 74.7%. The Fe 3 O 4 @MBT-LDH owned a good and long-term protection performance for Q235 carbon steel with maximum corrosion inhibition efficiency ( η e ) of up to 93.30%. As a promising controlled-release inhibitor, it could be recycled and regenerated by simple treatment, still having high η e higher than 80% and excellent magnetic properties with M s of 21.47 emu⋅g −1 after five cycles. The corrosion mechanism for carbon steel was further analyzed by quantum chemical calculations and molecular dynamics simulation.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2026
·
IF 5.1
Yang Pu,Xudong Yang,Shaoyang Chen,Hongxing Zhu,Zhengbai Zhao,Yang Wang,Chao Yan
The increasing power density of electronic devices demands materials that combine efficient thermal management with autonomous damage repair. In this study, a magnetic hybrid filler (Fe 3 O 4 @BN) was prepared by loading Fe 3 O 4 particles onto boron nitride (BN) surfaces via a coprecipitation method. The Fe 3 O 4 @BN filler was then incorporated into a self-healing polyurethane (SHPU) matrix, and an external magnetic field was applied to induce a vertically oriented filler network. Results showed that at Fe 3 O 4 @BN contents of 20 wt% and 25 wt%, the ordered structure effectively suppressed phonon scattering, increasing the out-of-plane thermal conductivity of the composite to a maximum of 0.76 W/m·K. Meanwhile, the SHPU matrix provided a thermally triggered self-healing function based on the synergy of reversible Diels–Alder bonds, disulfide bonds, and hydrogen bonds. After healing at 135 °C for 10 min followed by 12 h at 70 °C, cracks were completely repaired. The healed composites recovered most of their original tensile strength, elastic modulus, elongation at break, and thermal conductivity, demonstrating high healing efficiency for both mechanical and thermal transport properties. The enhanced thermal conductivity not only improved heat dissipation but also accelerated the healing process by rapidly delivering thermal energy to damaged regions. This work offers a promising strategy for developing long-life thermal management materials.
✓ 已验证
DOI
高影响因子
SOLID STATE SCIENCES
·
2026
·
IF 3.6
Yingxia Ma,Shuo Zhou,Tianze Li,Miaoshi Li,Wenhui Han
A superparamagnetic Fe 3 O 4 @Zn-AST nanocomposite was constructed. • The Fe 3 O 4 @Zn-AST had abundant N, S-containing functional groups. • The Fe 3 O 4 @Zn-AST exhibits a saturation magnetization of 61.29 emu/g. • The maximum adsorption capacity of Fe 3 O 4 @Zn-AST for Ag(I) was 1410.68 mg/g. Silver as a precious metal, is extensively utilized in jewelry, electronics and some other fields due to its excellent conductivity and ductility. With the growing demand for silver, excessive exploitation of silver ore resources has generated large volumes of Ag(I)-containing wastewater. The direct release of untreated Ag(I)-containing wastewater contaminates ecosystems and poses risks to human health. Metal-Organic Frameworks (MOFs) exhibit a notably specific surface area, ample unsaturated metal sites, ease of functionalization, and tunable pore size and structure, which make them highly promising materials for effective adsorption of pollutants from wastewater. However, pure MOFs are typically in powder form, which are not easy to separate and recover after adsorption. In this work, using the zinc nitrate hexahydrate as the metal precursor along with 2-amino-5-sulfanyl-1,3,4-thiadiazole (AST) as the multi-dentate organic ligand, a superparamagnetic Fe 3 O 4 @Zn-AST nanocomposite was prepared via in-situ solvothermal method. The Fe 3 O 4 @Zn-AST exhibits a saturation magnetization of 61.29 emu/g, meeting the requirements for magnetic separation. The maximum Ag(I) adsorption capacity of Fe 3 O 4 @Zn-AST is 1410.68 mg/g, and adsorption process is mainly chemical adsorption, featured by endothermic, disordered, and spontaneous. Adsorption-desorption experiments prove that the removal efficiency can remain above 91% even after five cycles. From FT-IR and XPS, the Fe 3 O 4 @Zn-AST adsorbing Ag(I) was mainly through the synergistic effect of -SH, N-containing functional groups and electrostatic interactions. Given the magnetic separation advantage and superior Ag(I) adsorption, Fe 3 O 4 @Zn-AST could serve as a promising adsorbent. Download: Download high-res image (241KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2026
·Vol. 56
·期 11
·229
·
IF 3.7
Chen Jialin,Tan Bo,Du Juan,Wang Qiang,Zhang Ting,Wang Lin
The anode as a critical component of microbial fuel cells (MFCs) directly influences microbial colonization and electron transfer efficiency. In this study, an iron-carbon composite material was synthesized through a one-step pyrolysis method using maltose as the carbon source. Phase analysis confirmed that the material with a composite consisting of Fe 3 O 4 embedded in a carbon matrix (Fe 3 O 4 @CM) was successfully synthesized. Electrochemical characterizations revealed that the electrode modified with Fe 3 O 4 @CM exhibited an electrochemical active area of 65.93 cm 2 and a specific capacitance of 299.4 mF cm −2 , both of which surpassed those modified with Fe 2 O 3 , Fe 3 O 4 and CM. Air–cathode (AC) MFCs were constructed using carbon felt (CF) with different modification materials as the anodes. The influence of various anodes on AC-MFC performance was systematically evaluated through cyclic voltammetry, electrochemical impedance spectroscopy, polarization curves, charge–discharge experiments, and chemical oxygen demand tests. Polarization curve measurements demonstrated that the maximum power density of the AC-MFC with Fe 3 O 4 @CM/CF anode was 861.1 mW m −2 , representing a 2.16-fold enhancement over the AC-MFC with unmodified CF (398.5 mW·m −2 ). Under identical conditions, the Fe 3 O 4 @CM/CF anode exhibited the highest output voltage, the largest electrochemical active area, the lowest internal resistance, and the highest coulombic efficiency, collectively contributing to enhanced power generation. Graphical abstract
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xianlin Zhan,Mengqiu Huang,Bicheng Li,Ge Ma,Wenbin You,Yun Tang,Lei Wang,Renchao Che
Rational design of magnetic-dielectric composites proves essential for developing broadband electromagnetic (EM) wave absorbers. However, the non-uniform distribution of magnetic particles within the carbon matrix significantly reduces magnetic coupling efficiency. To overcome this, we employ a confinement strategy to fabricate Fe/Fe 3 O 4 @C composite aerogels that feature a multiscale magnetoelectric coupling network. The confined-growth Fe/Fe 3 O 4 @C nanoscale magnetic‑carbon units construct high-density heterogeneous interfaces, enhancing charge accumulation and interfacial polarization, thereby further strengthening energy dissipation. Meanwhile, under the confinement of the aerogel framework, metal-organic frameworks (MOFs) derived materials in the 2D magnetized micro-flakes maintain their octahedral morphology and collectively establish a continuous, stable nano-micro-macro magnetic coupling network. Moreover, the theoretical investigations including density functional theory calculations, COMSOL Multiphysics simulation, and radar cross-section simulation systematically elucidate the structure-property relationships governing dielectric behavior, magnetic properties, and absorption bandwidth. Notably, the optimized Fe/Fe 3 O 4 @C exhibits remarkable EM absorption performance, achieving a reflection loss of −48.44 dB and a broad bandwidth of 6.88 GHz at 2.15 mm thickness, fully covering the Ku band. Moreover, constructing the periodic structure enables an ultrabroadband absorption of 11.36 GHz at a thickness of only 4.15 mm. This study provides an idea for fabricating multifunctional EM wave absorbers with lightweight, broadband absorption, hydrophobic, thermal insulation, and infrared stealth properties.
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Chen Wang,Yue Li,Wenlin Yuan,Jingting Yang
The incorporation of functional fillers into epoxy coatings is an effective approach to impart specific properties; however, the random distribution of fillers within polymer matrices often limits their utilization efficiency. Herein, a magnetic core–shell nanocontainer (TA@Fe 3 O 4 ) was rationally designed and fabricated by encapsulating Fe–tannic acid (Fe–TA) complexes within hollow mesoporous Fe 3 O 4 nanospheres. In this architecture, Fe 3 O 4 serves dually as a magnetically responsive core for field-directed enrichment and as an intrinsic carrier for tannic acid (TA), thereby eliminating the need for additional carrier engineering. The surface Fe–TA complexes undergo pH-responsive coordination transformation under acidic conditions, enabling the controlled release of TA molecules. The released TA subsequently chelates with the metal substrate to form a compact passivation layer, providing active corrosion inhibition. Magnetic-field guidance significantly shortens the diffusion path of TA, thereby enhancing its delivery efficiency to corrosion-prone regions. Electrochemical impedance spectroscopy revealed a substantial improvement in corrosion resistance: the |Z| 0.01Hz value of the magnetically modulated coating (M-TF/EP) reached 1.41 × 10 10 Ω·cm 2 , approximately one order of magnitude higher than that of non-modulated coating (TF/EP). This work presents a straightforward yet highly effective strategy that integrates magnetic targeting and pH- triggered inhibitor release within a single nanostructure by directly coating the inhibitor onto a magnetic carrier, thereby enabling active and intelligent corrosion protection without complex synthesis procedures.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Fang Li,Wenjie Cui,Jiangyong Liu,Yongping Zeng,Xue Ye,Jie Li
Achieving high selectivity to light olefins from CO2 hydrogenation under ambient pressure remains challenging due to unfavorable phase dynamics and excessive RWGS activity in iron-based catalysts. Comprehensive characterization reveals that moderate Ca addition inhibits water-induced oxidation of Fe5C2, stabilizes carbide phases, promotes electron transfer from CaCO3 to Fe species, and enhances CO transferfrom Fe3O4 (RWGS sites) to Fe5C2 (FTS sites). These effects synergistically suppress CO and CH4 formation while facilitating C–C coupling. The optimized Ca8K8FeMn catalyst delivers 26.9% CO2 conversion, 68.6% CO selectivity, 59.3% light olefins selectivity in hydrocarbons, and a space-time yield of 33.5 gC2‐C4=kgcat‐1h‐1 at 320 °C, 0.1 MPa, H2/CO2 = 3, GHSV = 3600 mL·g–1·h–1. Compared to the unmodified K8FeMn, CO selectivity decreases by ∼30%, CH4 by ∼10%, light olefins selectivity increases by 7.7%, and STY improves 6-fold. This work elucidates the critical roles of phase equilibrium and electronic modulation in ambient-pressure CO2-to-olefins catalysis.
✓ 已验证
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2026
·
IF 8.2
Baoyue Zhang,Ruixue Wang,Fan Wan,Xiaoyun Liu,Hongyao Xu,Shanyi Guang
Developing lightweight and multifunctional electromagnetic absorption (EMA) materials remains important for advanced electromagnetic protection applications. Herein, we report a multifunctional composite aerogel constructed through a host–guest engineering strategy. The polyimide (PI) framework serves as the host matrix, while magnetic hollow Fe 3 O 4 @CoNi@PDA microspheres and conductive carbon nanotubes (CNT) act as functional guests. Molecular dynamics simulations indicate hydrogen-bond-assisted interactions between acidified CNT and PAA chains during precursor assembly. These interactions help support the formation of a stable porous framework. The optimized PCH-3 aerogel achieves a minimum reflection loss (RL min ) of − 33.1 dB at 2.8 mm and a wide effective absorption bandwidth (EAB) of 7.9 GHz at 3.6 mm. Beyond EMA performance, PCH-3 shows low density, thermal insulation capability, and mechanical resilience. Its density and thermal conductivity are 24.0 mg cm⁻ 3 and 0.043W m −1 K −1 , respectively. It also retains 97% of its stress after 50 compression cycles. Furthermore, radar cross-section (RCS) simulations indicate a maximum reduction of 30.2 dB 2 under the given simulated conditions. This study provides a feasible strategy for designing lightweight multifunctional aerogels for electromagnetic protection and thermal management.
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2026
·
IF 10.7
Zheng Zhang,Ying Yang,Jiayi Zhang,Yunyi Zhang,Xiaohan Jin,Xiaoqi Zhang,Luna Niu,He Liu,Aijun Guo
The escalating crisis of global plastic pollution underscores an urgent need for truly sustainable and closed-loop technological solutions. While chemical recycling presents a promising route, its current reliance on fossil-derived hydrogen fundamentally undermines the process's environmental rationale. Herein, an innovative cascade catalytic system is introduced that directly addresses this challenge by employing the water-gas shift reaction (WGSR) as an in-situ hydrogen source. This integrated strategy enables the efficient conversion of polypropylene (PP) waste into high-value liquid fuels (C 5 -C 22 ). The process is driven by a rationally designed bifunctional catalyst, Ni-Fe 3 O 4 /USY. The reducible Fe 3 O 4 continuously generates active hydrogen species through the WGSR, while Ni finely tunes the redox properties required for CO activation. Concurrently, the acidic sites of the USY zeolite facilitate the selective cleavage of C-C bonds in the polymer chain. The results show that the well-designed tandem reaction achieves >99% conversion of post-consumer PP waste and a remarkably high liquid fuel yield of 83.2% under relatively mild conditions (340 °C). This study establishes a green and intensified pathway for plastic valorization, fundamentally circumventing the dependency on external fossil-based hydrogen and paving the way for more sustainable chemical recycling paradigms.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaozhou Li,Bin Wu,Zhen Gao,Wei Zhuang
To address the challenges of quantitative immobilization and unavoidable spatial hindrance of multiple enzymes in traditional multi-enzyme cascade immobilization, we developed a novel bienzyme immobilization system based on a hierarchically structured MXene@LDHs@Fe₃O₄ (MLF) carrier. The MLF composite, with a high theoretical surface area (∼300 m 2 /g), adjustable interlayer spacing (10–50 nm), and strong magnetization (20 emu/g), provides an ideal support for high-capacity enzyme loading. The system was fabricated through the assembly of MXene nanosheets with layered double hydroxides (LDHs) and magnetic Fe₃O₄ nanoparticles, integrating horseradish peroxidase (HRP) on the MLF core, a polydopamine (PDA) interfacial barrier, and surface-immobilized glucose oxidase (GOx) through melamine-genipin mediated dendritic cross-linking. This spatially organized catalytic architecture enables quantitative enzyme loading while minimizing spatial hindrance, thereby enhancing catalytic efficiency. The co-immobilized bienzyme reactor (GOX@PDA@HRP@MLF) achieved loading capacities of 272.46 mg/g for HRP and 414.33 mg/g for GOx, with an activity recovery of 85.3 % during 2,4-dichlorophenol degradation. The immobilized enzymes retained ∼80 % of their initial activity after five operational cycles. Under optimized conditions, the GOX@PDA@HRP@MLF material achieved a degradation rate of 4.6 for 2,4-dichlorophenol in a continuous flow system, representing a ∼21-fold increase in space-time yield compared to random multi-enzyme immobilization on single-layer resin materials. These results demonstrate that the dendritic cross-linking strategy employed in this study can serve as a universal method for multi-enzyme immobilization, with significant potential for industrial applications.
✓ 已验证
DOI
高影响因子
NUCLEAR TECHNOLOGY
·
2025
·
IF 2
Qianwen Wang,Dingcheng Wang,Jinfeng Li,Bo Tian,Zhigang Li,Jianwei Zhang,Wenze Li,Nan Zhang,Yunchen Du,Hongtao Zhao
The extraction and recovery of uranium play a crucial role in ensuring the sustainable supply of nuclear energy and safeguarding environmental security. The ideal uranium adsorbent should have high adsorption capacity, excellent selectivity, and good reusability. In this study, by employing the strategy of using MIL-100(Fe) as an intermediate linker, the core shell, structured of Fe3O4@NiFe-LDH, was successfully accomplished via a solvothermal method. The as-prepared Fe3O4@NiFe-LDH shows great potential in the field of uranium adsorption.On one hand, MIL-100(Fe) can act as an iron source for NiFe-LDH, making the core-shell structure more stable. It was observed that after four adsorption-desorption cycles, the adsorption efficiency of Fe3O4@NiFe-LDH could still reach 75% in the fifth cycle. By contrast, materials without the MIL-100(Fe) intermediate layer exhibited a relatively lower adsorption cycle efficiency for three cycles. On the other hand, the porous structure of metal organic framework (MOF) doubles the specific surface area of Fe3O4@NiFe-LDH compared to Fe3O4/NiFe-LDH without a MOF intermediate layer.The abundant hierarchical pore structure further enhances the performance of Fe3O4@NiFe-LDH from 615.6 mg·g−1 of Fe3O4/NiFe-LDH(8:1) to 862 mg·g−1. Additionally, in-depth studies on adsorption kinetics and adsorption thermodynamics suggest that the adsorption process is more inclined to monolayer adsorption and is dominated by chemical adsorption, which is a spontaneous endothermic process. When conducting ion competition tests on the adsorbent, it was found that the adsorbent has high adsorption selectivity for U(VI) and good regeneration ability. Therefore, the addition of the intermediate MOF improves the adsorption capacity and stability of the material, indicating that Fe3O4@NiFe-LDH has potential advantages in practical applications.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）