CERAMICS INTERNATIONAL
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2024
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IF 5.1
Wenhan Wang,Yongpeng Wang,Mengzhu Liu,Naidi Tan
Nowadays, high-efficiency electromagnetic wave absorption (EWA) materials with simple preparation techniques are desirable for practical applications. However, there are many obstacles need to be overcome. In this work, a novel 3D hollow tubular/spherical structure system has been established by using Fe 3 O 4 as a magnetic loss component, MWCNTs as a dielectric loss component, fly ash cenospheres (FACs) as a structural skeleton through simple self-assembly to achieve excellent EWA properties. Particularly, FACs which derive from power plant solid waste are hollow and insulating that help to regulate the electromagnetic parameters, the conductivity, and the impedance matching characteristics of the composites, as well as reduce the cost. The effect of the unique heterogeneous structure with multiple interfaces on the EWA performance is investigated. The superior absorption performance is primarily due to the synergistic effect of component design and the unique tubular/spherical structure, which provide efficient interfacial polarization loss, dipole polarization loss, moderate conductive loss, good impedance matching, and a large transmission route. The effective absorption bandwidth is as wide as 3.8 GHz at a thickness of 2.0 mm, and the RL min value is −47.35 dB at a thickness of 3.0 mm. The prepared Fe 3 O 4 /MWCNTs/FAC composites have excellent EWA properties that are superior to the majority of recently reported comparable composites. The product meets the requirements of high absorption performance, simple preparation, stable structure, low cost and environmental friendly, which greatly improves its applicability.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
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IF 11.2
Ying Xue,Xianyuan Liu,Xianyong Lu
Hierarchically three-dimensional (3D) materials present a pivotal challenge and opportunity in achieving effective microwave absorption with synergistic effects. In this work, α -Fe 2 O 3 @ZrO 2 with core-shell structure were fabricated in-situ on aramid nanofibers by a solvothermal method . Following calcination , 3D ZrO 2 /Fe 3 O 4 /C nanocomposites with Janus structure have been successfully synthesized. By controlling the lattice match and mismatch in both processes, a core-shell structure of α -Fe 2 O 3 @ZrO 2 and Janus structure of ZrO 2 /Fe 3 O 4 have been well-define performed. The composite material ZrO 2 /Fe 3 O 4 /C-700 has a minimum reflection loss (RL min ) of −67.4 dB at a thickness of 2.0 mm. The effective absorption bandwidth (EAB) at a thickness of 2.4 mm is 6.0 GHz (11.0–17.0 GHz). This study provides a novel strategy for fabricating high-efficiency electromagnetic wave absorption materials with dual synergistic effects in nanosized scale.
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Biomedical Materials
·
2024
·Vol. 19
·期 3
·035034
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IF 3.9
Qiangqiang Yin,Xiaolong Gao,Hao Zhang,Zhichen Zhang,Xiaoyang Yu,Jialong He,Guangyue Shi,Liguo Hao
This study developed a probe Fe3O4-Cy5.5-trastuzumab with fluorescence and magnetic resonance imaging functions that can target breast cancer with high HER2 expression, aiming to provide a new theoretical method for the diagnosis of early breast cancer. Fe3O4-Cy5.5-trastuzumab nanoparticles were combined with Fe3O4 for T2 imaging and Cy5.5 for near-infrared imaging, and coupled with trastuzumab for HER2 targeting. We characterized the nanoparticles used transmission electron microscopy, hydration particle size, Zeta potential, UV and Fourier transform infrared spectroscopy, and examined its magnetism, fluorescence, and relaxation rate related properties. CCK-8 and blood biochemistry analysis evaluated the biosafety and stability of the nanoparticles, and validated the targeting ability of Fe3O4-Cy5.5 trastuzumab nanoparticles through in vitro and in vivo cell and animal experiments. Characterization results showed the successful synthesis of Fe3O4-Cy5.5-trastuzumab nanoparticles with a diameter of 93.72 ± 6.34 nm. The nanoparticles showed a T2 relaxation rate 42.29 mM−1s−1, magnetic saturation strength of 27.58 emg g−1. Laser confocal and flow cytometry uptake assay showed that the nanoparticles could effectively target HER2 expressed by breast cancer cells. As indicated by in vitro and in vivo studies, Fe3O4-Cy5.5-trastuzumab were specifically taken up and effectively aggregated to tumour regions with prominent NIRF/MR imaging properties. CCK-8, blood biochemical analysis and histological results suggested Fe3O4-Cy5.5-trastuzumab that exhibited low toxicity to major organs and good in vivo biocompatibility. The prepared Fe3O4-Cy5.5-trastuzumab exhibited excellent targeting, NIRF/MR imaging performance. It is expected to serve as a safe and effective diagnostic method that lays a theoretical basis for the effective diagnosis of early breast cancer. This study successfully prepared a kind of nanoparticles with near-infrared fluorescence imaging and T2 imaging properties, which is expected to serve as a new theory and strategy for early detection of breast cancer.
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高影响因子
Advanced Healthcare Materials
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2024
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IF 10
Yuliang Xu,Sihan Wang,Jincheng Xiong,Pimiao Zheng,Huixia Zhang,Shiqi Chen,Qiang Ma,Jianzhong Shen,Tony Velkov,Chongshan Dai,Haiyang Jiang
Metal-organic framework (MOF)-based drug delivery nanomaterials for cancer therapy have attracted increasing attention in recent years. Here, we propose an enhanced chemodynamic anti-tumor therapy strategy by promoting the Fenton reaction by using core-shell zeolitic imidazolate framework-8 (ZIF-8)@Fe 3 O 4 as a therapeutic platform. Carboxymethyl cellulose (CMC) was used as a stabilizer of Fe 3 O 4 , which then decorated on the surface of ZIF-8 via the electrostatic interaction and served as an efficient Fenton reaction trigger. Meanwhile, the pH-responsive ZIF-8 scaffold acted as a container to encapsulate the chemotherapeutic drug doxorubicin (DOX). The obtained DOX-ZIF-8@Fe 3 O 4 /CMC nanoparticles concomitantly accelerated DOX release and generated more hydroxyl radicals by targeting the lysosomes in cancer cells. In vitro and in vivo studies verify that the DZFC nanoparticles trigger GPX4-dependent ferroptosis via the activation of the c-Jun N-terminal kinases (JNK) signaling pathway, following to achieve the chemo/ferroptosis synergistic anti-tumor efficacy. No marked toxic effects were detected during DZFC treatment in a tumor-bearing mouse model. This composite nanoparticle remarkably suppressed the tumor growth with minimized systemic toxicity, opening new horizons for the next generation of theragnostic nanomedicines. This article is protected by copyright. All rights reserved
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Longxin Wang,Yishan Wang,Dongdong Liu,Xuji Zhang,Guangwu Wen,Xueqian Zhang,Xiaoxiao Huang
In order to improve the weak dielectric loss capability and poor impedance matching of Fe 3 O 4 , the hexagonal plates of Fe 3 O 4 /Fe 2 O 3 /C nanocomposites were rationally constructed in this paper by utilizing electrostatic attraction and cross-linking, using polyacrylamide (PAM) as templating agent and viscosity modifier. The stacked hexagonal plates constructed a conductive network and utilized the structural properties of Fe 3 O 4 to promote the transfer and jump of free electrons, which effectively improved the conduction loss. The heterogeneous interface was effectively constructed due to the presence of Fe 2 O 3 and trace carbon, while the transfer and leap of free electrons promoted the generation of interfacial polarization, resulting in magnetoelectric coupling and effective improvement of polarization loss. The results show that the effective absorption broadband reaches 4.08 GHz when the matching thickness of the composite is 2 mm. A minimum reflection loss of −43.79 dB is realized at a matching thickness of 1 mm. The PAM modification proved to be an effective means to modulate the morphology and composition of the materials.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Kefa Sheng,Hongyu Xia,Jianping Ge
Selective hydrogenation of nitroaromatics is a crucial industrial reaction, but there are still challenges in developing nanocatalysts with stable active centers, yet easily recyclable characteristics. Here, a magnetically separable Pd/Fe 3 O 4 @SiO 2 nanocatalyst was prepared through the seeding growth of silica on the Fe 3 O 4 nanocrystal cluster (NC) followed by in situ reduction of Pd nanoparticles (NPs) on the amino group modified Fe 3 O 4 @SiO 2 nannotube (NT). The nanocatalyst showed good activity and stability in the hydrogenation of a series of nitroaromatics as the Pd NPs were highly dispersed on the nanotubes. Meanwhile, it could be easily separated from the reaction solution and well-redispersed in the solvent for the next-round reaction due to the superparamagnetic property of the Fe 3 O 4 NC and the good dispersibility of silica in many organic solvents. The magnetically separable nanocatalyst combined the high activity of the nanocatalyst and the convenient separation of a traditional heterogeneous catalyst, which effectively promote the practical application of nanomaterials in catalysis.
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高影响因子
CARBON
·
2024
·
IF 10.5
Ze Wu,Enjie Zhu,Youqiang Xing,Peng Huang,Bingjue Li,Lei Liu
Electrochemical ionic actuators have garnered significant attention following their discovery due to their potential to supplement or replace conventional rigid actuators, owing to their ability to achieve precise control over bending displacement across a wide range. This paper employs an MXene/CNT@Fe 3 O 4 electrode in electrochemical ionic actuators, which consists of a three-dimensional conductive network comprising a one-dimensional carbon nanotube loaded with ferroferric oxide magnetic particles (CNT@Fe 3 O 4 ) and a two-dimensional Ti 3 C 2 T x MXene. This actuator is characterized by high bending displacement (12.3 mm), a comprehensive response range (0.1–10 Hz), fast response time (≈5 s), and excellent durability (5 h, 93% actuation retention). The exceptional characteristics mentioned above can be attributed to manipulating the CNT@Fe 3 O 4 distribution within the MXene layers using magnetic regulation. This approach enhances dispersion and facilitates the formation of a three-dimensional conductive network structure with MXene, enabling efficient and multi-directional ionic migration. Moreover, the artificial muscles have successfully replicated flytraps' predation and birds' claw grasping. This study presents a new idea for the electrode design of electrochemical ionic actuators, elucidating the significant potential of MXene-based soft actuators in the domains of artificial muscles and bionics.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Li Li,Caimin He,Wenyang Lei,Pingping Gao,Ting Lei
It is of great importance to rationally develop and design cost-effective, high durable and non-noble metal catalysts for electrocatalytic water splitting. Here, self-supported well-defined crystalline iron oxides hybrid (FeO x /IF) was successfully fabricated by facile in-situ thermal air oxidation of iron foam. An investigation into the effects of thermal oxidation temperature on the crystalline structure and surface appearance of FeO x /IF was studied. The resultant FeO x /IF-550 reveals nanoarrays morphology composed of Fe 2 O 3 and Fe 3 O 4 hybrid with Fe 2 O 3 and Fe 3 O 4 heterojunctions , which exhibits remarkably superior catalytic activity towards HER with a low overpotential of only 98 mV to drive a current density of 10 mA cm −2 in alkaline solution. Meanwhile, FeO x /IF-550 exhibits good durability with negligible attenuation of overpotential at a large current density of 500 mA cm −2 for 24 h in alkaline solution. The excellent HER performance of FeO x /IF is mainly attributed to the synergistic effect of Fe 2 O 3 and Fe 3 O 4 , increased accessible active sites and accelerated charge transfer. The present study provides new insights into the design of cost-effective electrocatalysts with high activity and excellent stability for industrialization.
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高影响因子
FUEL
·
2024
·
IF 6.7
Chao Meng,Wenli Gu,Bo Peng,Run Xu,Hao Wang,Tian Lan,Guofeng Zhao,Yong Lu
Efficient conversion of CO 2 to methanol using a renewable source of H 2 is a feasible strategy to achieve the goal of carbon neutrality. A qualified InNi 3 C 0.5 /Fe 3 O 4 catalyst system was developed by the co-precipitation method. The effects of catalyst preparation were investigated systematically on the catalyst performance. Well-formation of InNi 3 C 0.5 nano-intermetallic is essential to a high activity/selectivity of catalyst, which is strongly dependent on the catalyst calcination/carburization temperatures. The catalytic-relevant electronic metal-support interaction is tightly linked with the InNi 3 C 0.5 particle size that is tunable with In-loading. The 5InNi 3 C 0.5 /Fe 3 O 4 -400/425 catalyst (5 wt% In, calcined at 400 °C and carburized at 425 °C), with a high turnover frequency of 513 h −1 and promising stability, achieves 12.3 % or 6.8 % CO 2 conversion and 95.6 % or > 99.8 % methanol selectivity without CH 4 formation at 250 or 200 °C, 4.0 MPa and 12,000 mL g cat −1 h −1 , for H 2 /CO 2 = 5/1. A high methanol space–time-yield of 2.62 g MeOH g cat −1 h −1 is obtainable at 250 °C and 6.0 MPa. A pathway of CO 2 -to-CO*-to-HCO*-to-CH 2 O*-to-CH 2 OH*-to-CH 3 OH* is proposed for the CO 2 hydrogenation to methanol over our InNi 3 C 0.5 /Fe 3 O 4 catalyst.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ao Zhang,Wei Wang,Ruopeng Cui,An Du,Jinsheng Jia,Yonggang Huang,Chunlei Wan,Ruina Ma
The preparation of multifunctional microwave absorbing materials with the characteristics of stronger absorption, wider bandwidth, lighter weight, higher strength and thinner thickness is an urgent research direction. Due to the difficulty of controllable distribution of absorbers, excellent microwave absorption performance is usually accompanied by large absorber amount and thickness, which can result in microwave absorption composite materials lack flexibility, mechanical properties, and adaptability to the environment. In this study, Ti 3 C 2 T x /Fe 3 O 4 /glass fiber paper composite was prepared by vacuum-assisted filtration. The controllable pore structure constructed by glass fiber enables uniform distribution of MXene/Fe 3 O 4 and effectively spreading of MXene monolayer film, enhancing conductivity loss and interface loss. By controlling the diameter of glass fiber, the pore size and the distribution of absorber can be regulated, thereby achieving a minimum reflection loss of up to −57.2 dB at an ultra-low filling ratio of 1.66 wt%. With the addition amount of 1.90 wt%, the effective absorption bandwidth can cover the whole X-band. The ultra-low specific reflection loss exceeds most of fabric materials and MXene-based absorbers. Meanwhile, the composite material exhibited excellent mechanical properties with a tensile strength of 3.054 kN/m and a burst resistance of 290 kPa. In addition, the adhesion between the filler and the glass fiber was increased by adding acrylic resin-based aqueous adhesive, and the surface grafting functional group (-F) made the composite material superhydrophobic. This work provides a new strategy to synthesize multifunctional absorbing material with low filling ratio and strong environmental practicality.
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ENVIRONMENTAL POLLUTION
·
2024
·
IF 7.6
Mengli Han,Zhao Chen,Genlou Sun,Yuxi Feng,Yuxia Guo,Shiqie Bai,Xuebing Yan
Cadmium (Cd) poses a significant threat to plant growth and the environment. Nano-Fe 3 O 4 is effective in alleviating Cd stress in plants. Elymus nutans Griseb. is an important fodder crop on the Qinghai-Tibetan Plateau (QTP). However, the potential mechanism by which nano-Fe 3 O 4 alleviates Cd stress in E. nutans is not well understood. E. nutans were subjected to single Cd, single nano-Fe 3 O 4 , and co-treatment with nano-Fe 3 O 4 and Cd, and the effects on morphology, Cd uptake, antioxidant enzyme activity, reactive oxygen species (ROS) levels and programmed cell death (PCD) were studied to clarify the regulatory mechanism of nano-Fe 3 O 4 . The results showed that Cd stress significantly decreased the germination percentage and biomass of E. nutans . The photosynthetic pigment content decreased significantly under Cd stress. Cd stress also caused oxidative stress and lipid peroxidation, accumulation of excessive ROS, resulting in PCD, but the effect of nano-Fe 3 O 4 was different. Seed germination, seedling growth, and physiological processes were analyzed to elucidate the regulatory role of nano-Fe 3 O 4 nanoparticles in promoting photosynthesis, reducing Cd accumulation, scavenging ROS, and regulating PCD, to promote seed germination and seedling growth in E. nutans . This report provides a scientific basis for improving the tolerance of Elymus to Cd stress by using nano-Fe 3 O 4 .
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高影响因子
Chemical Engineering and Processing-Process Intensification
·
2024
·
IF 3.8
Tianlei Yang,Yueping Guan,Buhui Ren,Yifan Sun,Xinping Jiang,Tao Li
For the application needs of histidine-rich protein separation, this study proposes to prepare a magnetic adsorbent enriched with copper ions and small particle size. Using a compression nebulizer, the magnetic + sodium alginate solution was broken into micrometer-sized droplets and cross-linked and cured with copper ion solution. The magnetic copper alginate microspheres (Cu 2+ -Alg@Fe 3 O 4 ) were obtained with an average particle size of 7.1 μm, a magnetic saturation intensity of 36.9 emu·g −1 , and a Cu 2+ content of 149.2 mg·g −1 .The adsorption equilibrium time of the Cu 2+ -Alg@Fe 3 O 4 microspheres on bovine hemoglobin(BHb) was 90 min, and the maximum adsorption amount was 4318.5 mg·g −1 . The Cu 2+ -Alg@Fe 3 O 4 microspheres also showed stable and good adsorption performance in five cyclic adsorption experiments.
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