Materials Horizons
·
2025
·
IF 10.7
Meiyan Liu,Xiuchen Wang,Yajing Wang,Bobo Shi,Jiaxin Feng,Zhe Liu
To break through the performance bottlenecks of electromagnetic protection materials in terms of lightweight design, broadband absorption, and multifunctional integration, this work proposes a synergistic design strategy based on magneto–dielectric coupled absorbing units and periodic micro-circular array superstructures. At the microscopic scale, oleic acid (OA)-modified γ-Fe2O3/graphene oxide (OA-γ-Fe2O3/GO) composite absorbing units were constructed and organized into precisely controllable millimeter-scale periodic micro-circular arrays. Acting as an artificial electromagnetic structure capable of actively modulating the electromagnetic field distribution, the array enables multiple scattering, progressive attenuation, and continuous impedance transition within the interface, thereby significantly optimizing the energy dissipation pathways. A pressing process was employed to integrate polytetrafluoroethylene (PTFE) onto the fabric surface, realizing a high-performance composite fabric with an overall thickness of only 0.128 mm. The resulting composite exhibits outstanding performance, with a shielding effectiveness (SET) of 73.99 dB, a minimum reflection loss (RLmin) of −31.56 dB, and an effective absorption bandwidth (RL < −10 dB) spanning 10.93–11.83 GHz. Meanwhile, it demonstrates excellent multifunctional properties, including a water contact angle of 125.7°, a tensile strength of 142 MPa, and the retention of 93% of its initial shielding performance after 10 000 bending cycles. Compared with commercial thin shielding textiles, the proposed material achieves an improvement of over 20% in shielding effectiveness and over 30% in absorption performance. This study not only provides a high-performance electromagnetic protection material but also establishes a cross-scale “unit–structure” synergistic design framework, offering a new fundamental paradigm for developing intelligent and adaptive electromagnetic protection systems. The strategy holds great potential for applications in stealth technology, aerospace engineering, and wearable electronics.
研究领域:
材料科学
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电磁功能材料
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纳米复合材料
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柔性电子学
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表面工程
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产品关联
DOI
PubMed
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2023
·Vol. 18
·期 7
·2300102
·
IF 2.8
Wenlong Chu,Ruifeng Xin,Luwei Zou,Xiulian Fan,Xilong Zhou,Cheng Li,Yu Zhou
2D nonlayered materials have attracted more and more attention due to their novel properties and special surface structures. However, due to isotropic chemical bonds within the crystal, the synthesis of ultrathin 2D nonlayered materials is an urgent challenge. Herein, α -Fe 2 O 3 2D nanosheets as thin as ≈8.2 nm on different substrates using self-designed ultralow concentration precursors combined with Gibbs free energy and Se catalysts design are successfully synthesized. The thickness-dependent growth mechanism is systematically studied, demonstrating the thermodynamic and kinetic controlling factors. The as-grown α -Fe 2 O 3 nanosheets are demonstrated with single-crystal structures without any other elements doping. The α -Fe 2 O 3 nanosheets photodetectors show the reasonable response performance with the positive photoconductive mechanism. This improved chemical vapor deposition method provides a promising idea for the synthesis of ultrathin 2D nonlayered materials.
研究领域:
材料科学
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纳米科技
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表面科学
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凝聚态物理
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光电子学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Dongchen Lv,Jiayi Gao,Yifan Shao,Yudi Wang,Jiahong Pan,Yanqing Cong,Shi-Wen Lv
Herein, we adopt a feasible method to synthesize the CuO/Fe 2 O 3 composite with heterostructure. Owing to the significant differences in work functions, an internal electric field is built at the interface of heterojunction after the combination of CuO with Fe 2 O 3 , which can reduce interface resistance and accelerate charge transfer. Interestingly, under the induction of electrostatic interaction provided by internal electric field, the CuO/Fe 2 O 3 composite will form electron-rich and electron-deficient active zones. More importantly, the peroxymonosulfate (PMS) can be oxidized by the CuO with electron-deficient active zone to generate SO 5 •‒ , subsequently converting into 1 O 2 . Meanwhile, the Fe 2 O 3 component with electron-rich active zone can provide electrons for PMS to achieve the heterolysis of Fe-O-O, thereby producing the high-valent metal complex (namely ≡ Fe 5+ =O). Consequently, the CuO/Fe 2 O 3 -2-mediated PMS system with good anti-interference ability displays excellent performance in wastewater treatment. Benefiting from the electrophilic reaction of 1 O 2 and ≡ Fe 5+ =O, various typical organic pollutants can be ultimately mineralized into CO 2 , H 2 O and other nontoxic by-products by the CuO/Fe 2 O 3 -2-mediated PMS system. In short, current work shares some novel insights into the effect of internal electric field on PMS activation, which can provide valuable references for future research.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
SOFT MATERIALS
·
2024
·
IF 1.6
Jing Wang,Shaopeng Lv,Xinchen Gui,Yadong Yu
Developing innovative packaging films is of great significance for extending the shelf-life of perishable fruit. In this study, we successfully synthesized antibacterial composites by incorporating Fe into reduced graphene oxides (rGO) and MoS2. The resulting rGO-MoS2-Fe2O3 composites demonstrated effective inhibition against E. coli and S. aureus. After investigating the antibacterial mechanism of rGO-MoS2-Fe2O3 composites, we utilized carboxymethyl cellulose (CMC) as a film substrate to create CMC films infused with rGO-MoS2-Fe2O3 composites. The incorporation of rGO-MoS2-Fe2O3 composites decreased the light transmittance and hygroscopicity of CMC films, while greatly enhancing the mechanical properties of CMC films. To evaluate the practical applications of these rGO-MoS2-Fe2O3-based CMC films, we conducted a strawberry preservation experiment, which revealed that CMC films supplemented with 5 wt% rGO-MoS2-Fe2O3 exhibited exceptional performance in preventing weight loss and maintaining total titratable acidity levels in strawberries. These findings highlighted the promising potential of rGO-MoS2-Fe2O3-based CMC films for fruit preservation applications.
研究领域:
材料科学
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食品科学
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生物技术
·
农业工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Wenjing Pan,Yong Zhang,Sujing Yu,Xiaohua Liu,Dongzhi Zhang
The metal-organic framework (MOF)-derived alpha-iron oxide hollow nanosphere/molybdenum diselenide nanoflower (α-Fe 2 O 3 /MoSe 2 ) composite is fabricated via simple hydrothermal route. Multiple characterization methods have proved the successful synthesis of α-Fe 2 O 3 /MoSe 2 composites. The nanocomposite with a mass ratio of α-Fe 2 O 3 and MoSe 2 of 4:1 shows high response to H 2 S gas sensing. Moreover, the gas sensitivity test of the system shows that the α-Fe 2 O 3 /MoSe 2 composite sensor exhibits a faster response/recovery rate, outstanding repeatability and anti-humidity interference toward H 2 S sensing at room temperature, which also shows excellent selectivity for H 2 S compared to various potentially interfering gases. Further studies have shown that α-Fe 2 O 3 /MoSe 2 nanocomposites have improved H 2 S gas sensing performance due to the increased active sites and specific surface area, and the formation of n-n heterojunctions at the interface between α-Fe 2 O 3 hollow nanospheres and MoSe 2 nanoflowers.
研究领域:
材料科学
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化学传感器
·
纳米技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yu Bing,Zhao Song,Hongtao Jiang,Xiaoyi Xu,Zhongzheng Yu,Tingting Zhou,Tong Zhang
Water competitive adsorption and limited reaction sites on the micro-scale sensing area of micro-electro-mechanical system (MEMS) sensors are two bottleneck problems that restrict the detection of trace indoor polluted gases, leading to drifting and weak signals. To address this, a “duet-insurance” sensing strategy is proposed to protect and amplify the sensing signal. For the first-level protection, the well-designed double-layer structure consisting of Janus TpMa covalent organic framework (COF)/Eu-doped α-Fe 2 O 3 can resist diffusion of water molecules and facilitate the electron transfer from formaldehyde (CH 2 O) to sensing layers, benefiting from the outer hydrophobic character of Janus TpMa and the strong CH 2 O adsorption capacity of Eu-doped Fe 2 O 3 . For the second-level amplification, the unique variable temperature excitation facilitates the deep penetration of CH 2 O into the active sites across COF layers, enabling signal amplification through thermally actuated carrier modulation. The sensor demonstrates high sensing ability to the CH 2 O, with an ultra-low limit of detection of 794 ppt. Leveraging the novel sensing strategy, a multi-functional, visual sensing system is designed to identify multi-indoor pollution gases by feature signal encoding and color mapping, showcasing the promising potential for MEMS sensors based on Janus TpMa COF/Eu-doped α-Fe 2 O 3 materials.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2020
·
IF 4.302
Qian Guo,Guangbei Tang,Wenjie Zhu,Yongming Luo,Xiaoya Gao
Pyrite is the most abundant sulfide semiconductor mineral with excellent optical properties . However, few reports have investigated its photocatalytic activity because of the low photogenerated carrier separation efficiency. In this work, a Z-scheme FeS 2 /Fe 2 O 3 composite photocatalyst was fabricated in situ via structural transformation of pyrite through heat treatment. A remarkably enhanced photocatalytic performance was observed over the FeS 2 /Fe 2 O 3 composite photocatalyst. Compared with the pristine pyrite, the degradation efficiency of carbamazepine (CBZ) reached 65% at the added hexavalent chromium (Cr(Ⅵ)) concentration of 20 mg/L and the Cr(Ⅵ) was nearly completely reduced in the mixed system using FeS 2 /Fe 2 O 3 within 30 min under simulated solar light irradiation. The enhanced photocatalytic activity can be attributed to the efficient separation and transfer of photogenerated carriers in the FeS 2 /Fe 2 O 3 composite photocatalyst. This facilitated the generation of •OH, hole (h + ) and •O 2 − species, which participated in the photocatalytic reaction with CBZ. Based on the measurement of the active species and electric properties, a Z-scheme electron transfer pathway was proposed for the FeS 2 /Fe 2 O 3 composite photocatalyst. This work broadens the application potential of pyrite in environmental remediation.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 32
·期 8
·085502
·
IF 3.551
Shujing Wu,Juan Du,Qisen Xiang,Dianbo Zhao,Yanhong Bai
The immunochromatographic strip test (ICST) is a powerful on-site detection technology due to its unique advantages of simplicity, rapidity, and readability by the naked eye. Here we illustrate the potential of α-Fe2O3 polyhedrons as a novel visual label, which exhibit advantages of high stability and economy, for the detection of Listeria monocytogenes (L. monocytogenes) as a model foodborne pathogen. A low-cost and simple one-step solvothermal approach was developed for the synthesis of α-Fe2O3 polyhedrons; the average diameter of the α-Fe2O3 polyhedrons is about 200 nm. The crystal structure and morphology of α-Fe2O3 polyhedrons were characterized by x-ray diffraction and transmission electron microscope. α-Fe2O3 polyhedrons were immunized with anti-L. monocytogenes antibody to prepare an antibody–colloidal α-Fe2O3 polyhedron ICST. Visual detection can be obtained directly by the naked eye within 10 min. The detection limit of L. monocytogenes by α-Fe2O3 polyhedron ICST assay was 3.8 × 106 and 5.6 × 106 CFU/ml of pure culture and artificially spiked orange juice drink sample, respectively. Results indicated that the antibody–colloidal α-Fe2O3 polyhedron ICST is a rapid, simple, and low-cost assay. This approach showed great potential in the application of foodborne pathogen detection concerning food safety.
研究领域:
材料科学
·
分析化学
·
食品安全
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Jieli Guo,Shanmei Tu,Limin Li,Xiujing Xing,Wei Xiong,Hao Li
Combining two metal–organic frameworks (MOFs) with different compositions and structures is an effective way to grow MOF-on-MOF materials. MOF-on-MOF-derived Fe2O3/CoFe2O4 nanocomposites were constructed by epitaxial growth method and high-temperature heat treatment. The morphology and structure of Fe2O3/CoFe2O4 were modulated by varying different organic ligands, and their effects on the detection properties of Pb2+, Cu2+, Hg2+, and Cd2+ were explored. Co3O4 microspheres acted as stabilizing seeds, and typical samples of Fe2O3/CoFe2O4-2 nanocomposites showed spherical nanoparticles of the core–shell type with an average diameter of about 55–60 nm. Meanwhile, compared with individual MOF derivatives, the surface of MOF-on-MOF derivative materials had higher electrical conductivity and active surface area by high-temperature heat treatment, thus promoting efficient adsorption of a wide range of heavy metal ions (HMIs). Furthermore, Fe2O3/CoFe2O4-2/GCE exhibited excellent electrochemical detection performance for the simultaneous detection of Pb2+, Cu2+, Hg2+, and Cd2+ with low limit of detection (LOD) of 2.98, 8.56, 4.44, and 5.40 nM, respectively. By two-by-two and three-by-three assays, promoting and inhibiting effects of different HMIs were observed on the target ions. This work is significant for the development of high-performance MOF-on-MOF-derived Fe2O3/CoFe2O4 nanocomposites for real-time environmental monitoring.
研究领域:
分析化学
·
环境监测
·
纳米材料科学
·
电化学传感
·
功能材料
✓ 已验证
产品关联
DOI
高影响因子
Royal Society Open Science
·
2018
·Vol. 5
·期 3
·
IF 2.504
Yi Yang,Huiping Zhang,Ying Yan
Fe2O3-ZSM-5 catalysts (0.6 wt% Fe load) prepared by metal-organic chemical vapour deposition (MOCVD) method were evaluated in the catalytic wet peroxide oxidation (CWPO) of m-cresol in a batch reactor. The catalysts have a good iron dispersion and small iron crystalline size, and exhibit high stability during reaction. In addition, the kinetics of the reaction were studied and the initial oxidation rate equation was given. Catalysts were first characterized by N2 adsorption–desorption isotherms, scanning electronic microscopy, energy-dispersive spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Results show that extra-framework Fe3+ species (presenting in the form of Fe2O3) are successfully loaded on ZSM-5 supports by MOCVD method. Performances of catalysts were tested and effects of different temperature, stirring rate, catalyst amount on hydrogen peroxide, m-cresol, total organic carbon (TOC) conversion and Fe leaching concentration were studied. Results reveal that catalytic activity increased with higher temperature, faster stirring rate and larger catalyst amount. In all circumstances, m-cresol conversion could reach 99% in 0.5–2.5 h, and the highest TOC removal (80.5%) is obtained after 3 h under conditions of 60°C, 400 r.p.m. and catalyst amount of 2.5 g l−1. The iron-leaching concentrations are less than 1.1 mg l−1 under all conditions. The initial oxidation rate equation −rA0=7.2×1011e−81300/RTCA is obtained for m-cresol degradation with Fe2O3-ZSM-5 catalysts.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2013
·
IF 5.437
Zhicai Xing,Jingqi Tian,Abdullah M. Asiri,Abdullah H. Qusti,Abdulrahman O. Al-Youbi,Xuping Sun
In this article, for the first time, two-dimensional hybrid mesoporous Fe 2 O 3 –graphene (mFe 2 O 3 –G) nanostructures were developed as a peroxidase mimetic with catalytic activities superior to those of mFe 2 O 3 , G, and previously reported Fe-based peroxidase mimetics. The high-surface-area mFe 2 O 3 not only offers a large number of catalytically active sites, but also facilitates the diffusion of 3,3,5,5-tetramethylbenzidine (TMB) and H 2 O 2 toward G surface. On the other hand, G is π-rich and thus favors the adsorption and enrichment of TMB within these pores. These synergistic effects lead to highly improved catalytic performances. Based on these findings, a simple, rapid, and highly sensitive and selective optical detector of glucose has been developed and demonstrated in buffer solution with a pretty low detection limit of 0.5 μM. In addition, this nanosensor is reusable and can also be used for glucose detection in diluted serum.
研究领域:
生物医学工程
·
纳米技术
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2024
·
IF 10
Yi Sun,Xin Peng,Yudong Guan,Tong Su,Zezun Xie,Ziying Wu,Yongxuan Long,Huihui Zhu,Jie Shao,Xiaoli Mai,Xuzhi Shi,Tingting Wu,Zhaogang Teng,Bing Zhang,Kun Chen,Xiaoyan Xin
Photodynamic Therapy (PDT) offers a promising minimally invasive treatment for breast cancer, but its efficacy is limited by the hostile tumor microenvironment (TME), including hypoxia and high glutathione (GSH) levels. Although various strategies to improve oxygen concentration or reduce reactive oxygen species (ROS) resistance for enhanced PDT have been explored, they typically require intricate design and complex synthesis of multifunctional nanocarriers. Thus, this study introduces a facile K 2 FeO 4 -induced strategy to enhance PDT efficiency in breast cancer through the tumor in situ synthesis of Fe 2 O 3 and O 2 . Inspired by the successful application of K 2 FeO 4 in ecological remediation and hemostasis, K 2 FeO 4 reacts with GSH, biological system, H 2 O 2 , and water, to generate Fe 2 O 3 and O 2 . Intratumoral injection of K 2 FeO 4 improves the TME, followed by Ce6 administration to enhance PDT through synergistic ferroptosis. This approach boosts PDT efficacy significantly by increasing ROS generation, lipid peroxidation, and inhibiting GSH and GPX4. Proteomic analysis revealed alterations in key pathways, including endocytosis and energy metabolism. This K 2 FeO 4 -PDT strategy creates a positive feedback loop by enhancing oxidative stress, providing an interesting and promising approach to PDT.
研究领域:
癌症研究
·
药学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）