MATERIALS RESEARCH BULLETIN
·
2014
·
IF 1.968
Shi Li,Shang-Ru Zhai,Qing-Da An,Ming-Hui Li,Yu Song,Xiao-Wei Song
The preparation of Co(II) supported magnetic heterogeneous catalyst, i.e. Fe 3 O 4 @SiO 2 –NH 2 @CS–Co, and its efficient and selective catalytic properties toward the oxidation of ethylbenzene to acetophenone are presented. The materials were characterized by various physicochemical techniques such as scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, vibrating sample magnetometer, elemental analysis, inductively coupled plasma-atomic emission spectrometer and X-ray photoelectron spectroscopy, etc. The reaction conditions were thoroughly investigated and highly improved catalytic performance (82.5% conversion of ethylbenzene and 80.1% selectivity to acetophenone) was gained under more mild reaction conditions of lower temperature (70 °C), shorter reaction period (60 min) and cheaper and greener oxygen source (H 2 O 2 ). More importantly, it could be reused successively at least 10 times when more than 80% of its catalytic activity maintained.
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DOI
高影响因子
ACS Omega
·
2020
·
IF 2.87
Ping Fan,Jiahao Tang,Shunxin Jia,Pengbo Liu,Jintao Yang,Feng Chen,Zhengdong Fei,Mingqiang Zhong
Two nanocomposites with a hierarchical structure (GO@CuSilicate@Fe3O4 and GO@Fe3O4@CuSilicate) were fabricated in this paper. These as-synthesized nanocomposites were analyzed for their structural, compositional, and morphological features by X-ray diffraction, scanning electron microscopy (SEM), Raman spectroscopy, and Brunauer–Emmett–Teller methods. SEM images showed that both nanocomposites had a core–shell structure, and their shells were composed of CuSilicate nanoneedle arrays. Further, their total electromagnetic shielding efficiency was measured and compared in a wide frequency range of 8–12 GHz (X-band). Because of the “antenna” role of CuSilicate nanoneedle arrays and the polarization at the interface between graphene oxide (GO) and Fe3O4, GO@Fe3O4@CuSilicate showed higher electromagnetic shielding performance than that of GO@CuSilicate@Fe3O4. With 1 mm thickness, GO@Fe3O4@CuSilicate showed a high electromagnetic shielding efficiency (over 40 dB) in the whole X-band (8.2–12.4 GHz) and reached a maximum value (41.8 dB) at 8.2 GHz. Its total electromagnetic shielding efficiency was mainly contributed by absorption rather than reflection. This study provided an idea for the structural design of high-performance electromagnetic shielding materials in the GHz frequency range (X band).
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高影响因子
TALANTA
·
2025
·
IF 6.1
Chenghao Lin,Qianyi Li,Gengliang Liu,Zixuan Xi,Xiaoxia Yan,Shijun Li,Liang He,Pengli Bai
Alzheimer’s Disease (AD), a most common neurodegenerative disease, has aroused people's great attention. Amyloid-β 1-42 (Aβ42) from serum/plasma has been listed as Core 1 biomarker in diagnostic guide and explore an ultrasensitive detection method of Aβ42 is of great significance for early AD diagnosis and treatment. Herein, an ultrasensitive fluorescent biosensor for Aβ42 detection is designed, which is composed of Fe 3 O 4 @MoS 2 microsphere and Au-Ag alloy. Compared with typical single gold nanoparticles in traditional fluorescent biosensor, alloy nanoparticles can generate a stronger electromagnetic field to enhance the fluorescence of quantum dots via surface plasmon resonance, achieve the effect of signal amplification. Importantly, our design significantly improved the limit of detection to 11 ag/mL, with a linear response ranging from 0.1 to 10 4 fg/mL. Moreover, by replacing the detection antibody in the biosensor, it can also be applied to other common AD biomarkers, such as Aβ40 (linear range: 0.1 to 10 5 fg/mL, LOD: 61 ag/mL) and total Tau protein (linear range: 0.1 to 10 5 fg/mL, LOD: 40 ag/mL). The biosensor exhibited excellent performance in both spiked and real serum samples. This fluorescent biosensor based on Au-Ag alloy strategy with ultra-sensitivity and good selectivity, provides a reliable solution for AD’s early diagnosis.
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产品关联
DOI
PubMed
高影响因子
IONICS
·
2025
·
IF 2.6
Chen Silu,Lu Songhua,Ma Jianfeng
The incorporation of semiconductor materials on Fe 3 O 4 has been demonstrated as an efficient way to promote the photocatalytic activity of Fe 3 O 4 . Therefore, we synthesized Fe 3 O 4 @In 2 S 3 composite by growing ultrathin In 2 S 3 nanosheets on the surface of Fe 3 O 4 using a simple one-pot water bath heating method. Fe 3 O 4 @In 2 S 3 exhibited high adsorption and photoreduction capacities for Cr(VI) under wide pH, as well as excellent magnetic separation property. Meanwhile, the adsorption and reduction ability of Fe 3 O 4 @In 2 S 3 towards Cr(VI) maintained high level in low-valent anions system, while it significantly declined with existence of high-valent anion (PO 4 3− ). A sharp contrast between the two situations manifested that the Fe 3 O 4 @In 2 S 3 has strong anti-interference in low-valent anions system. Furthermore, cyclic experiments revealed the admirable photocatalytic activity and reusability of Fe 3 O 4 @In 2 S 3 . According to the results of adsorption and cyclic experiments, a distinctly enhanced proportion of Cr on surface of Fe 3 O 4 @In 2 S 3 in the first cycle experiment was observed, which indicated that the photocatalytic reduction of Cr(VI) probably promoted the immobilization of Cr species on Fe 3 O 4 @In 2 S 3 . XPS analysis results suggested that the Cr(VI) loaded on Fe 3 O 4 @In 2 S 3 mostly reduced to Cr(III) via photocatalytic reduction process with In 2 S 3 , and Fe 3 O 4 partly contributed to its reduction. Finally, the enhanced adsorption and reduction capacity of Fe 3 O 4 @In 2 S 3 for Cr(VI) and its easy recycling feature make it has great application potential in Cr(VI) wastewater treatment.
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Xiaojiu Tang,Shengli Li,Chunjin Hang,Qilong Guan,Rui Bai,Dan Yu,Ying Ding,Xiuli Wang
With the development of deep space exploration technology, it is particularly important to prepare a lightweight composite material with both electromagnetic and radiation shielding properties. Fe 3 O 4 has been widely used in the field of electromagnetic shielding due to its properties, while not much research has been done on Fe 3 O 4 in the field of radiation shielding. In this study, Fe 3 O 4 nanoparticles achieving a uniform distribution between multilayer MXene (i.e., Ti 3 C 2 T x ), which not only demonstrates excellent dispersion within epoxy resin but also prevents the collapse of the Ti 3 C 2 T x layers, thus inheriting excellent gamma-rays absorption properties. Simultaneously, the presence of Fe 3 O 4 nanoparticles has been demonstrated to increase the Fe concentration on the Ti 3 C 2 T x surface, thereby restricting the free movement of gamma-rays and optimizing its permittivity. The Fe 3 O 4 @Ti 3 C 2 T x /EP composite material has a high linear attenuation coefficient (0.71 cm −1 ) and outstanding gamma-ray shielding capability. The incorporation of Fe 3 O 4 @Ti 3 C 2 T x increases the shielding performance of the material by up to 6 times compared to epoxy resin. This work presents an avenue for the development of light-weight gamma ray shielding packaging materials.
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产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 9
·094002
·
IF 3.399
Desheng Li,Yu Zhang,Kun Rui,Huijuan Lin,Yan Yan,Xiaoshan Wang,Chao Zhang,Xiao Huang,Jixin Zhu,Wei Huang
Nanostructured manganese oxides have been regarded as promising anodes for lithium-ion batteries (LIBs) due to their high specific capacity, environmental friendliness and low cost. However, as conversion-type electrodes, their scalable utilization is hindered by intrinsically low reaction kinetics, large volume variation and high polarization. Herein, a coaxial-cable tubular heterostructure composed of a hollow carbon skeleton, Fe3O4 nanoparticles and ultrathin MnO2 nanosheets from inside out, donated as MnO2@Fe3O4@C, is synthesized via a facile two-step hydrothermal process. The unique design integrates conductive carbon and nanostructured MnO2 and Fe3O4 into a one-dimensional (1D) hierarchically open architecture, which provides abundant electrode–electrolyte contact areas, favorable heterointerfaces and ultrafast electron/ion pathways. Benefiting from these features, the MnO2@Fe3O4@C anode exhibits a high reversible capacity of 946 mAh g−1 at 200 mA g−1 after 160 cycles, and excellent cyclability with a specific capacity of 845 mAh g−1 at 500 mA g−1 after 600 cycles. This work might provide an insightful guideline for the design of novel electrode materials.
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DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Wang Yangyang,Xu Jianfeng,Wang Xiaoshu,Li Tongtong,Zhang Gen,Yan Zheng,Liu Jiancong,Wang Lei
The background value of iron in red soil is superior, primarily absorbed and homogeneously encapsulated in harvested biomass. However, this property on the high-value utilization of bionic iron-encapsulated biomass remains unknown. In this study, special biochar (Fe@BC) was obtained from this kind of biomass by one-step pyrolysis method, which was further used to activate peroxydisulfate (PDS) and degrade 2,4-dichlorophenol (2,4-DCP). The results showed that Fe3O4 was formed and homogeneously embedded in biochar at 500oC. Comparing to catalysts prepared by impregnation pyrolysis (Fe/BC), Fe@BC exhibited excellent degradation performance (90.9%, k = 0.0037 min−1) for 2,4-DCP. According to the free radicals quenching studies, hydroxyl radicals (·OH) and superoxide radicals (·O2−) were the dominant reactive oxygen species (ROS) in Fe@BC/PDS system. Importantly, a PDS adsorption model was established, and the electron transport and PDS activation in the core-shell structure were demonstrated by DFT calculations. Therefore, this study could supply a high-performance catalyst and significant implications for high-value biomass utilization in red soil.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Tiansheng Liu,Na Liu,Shangru Zhai,Shengshuai Gao,Zuoyi Xiao,Qingda An,Dongjiang Yang
Well-ordered core/shell/shell-like Fe 3 O 4 @SiO 2 @PPy microspheres with prominent electromagnetic microwave absorption performance were successfully obtained by microemulsion polymerization method. The morphology, crystal form, functional group, magnetism and microwave absorption properties were investigated. The tailored shell thickness can be tuned from 20 to 60 nm (including SiO 2 layer) via changing the molar ratio of Fe 3 O 4 @SiO 2 to Pyrrole. The absorption peak positions gradually move to low frequency with increment of coating thicknesses. The minimum RL reached −40.9 dB at 6 GHz with the coating thickness of 5 mm. The effective absorption bandwidth could reach 6.88 GHz from 11.12 to 18 GHz, completely covering the whole K (12–18 GHz) band. Meanwhile, it showed excellent wave absorption in 4.4–18 GHz with different coating thickness. The perfect electromagnetic wave absorption properties could be attributed to the dielectric loss from the special core/shell/shell microstructure and natural resonance from the Fe 3 O 4 microspheres. These newly prepared Fe 3 O 4 @SiO 2 @PPy microspheres might be considered as prospective nominees for highly efficient microwave absorption materials with tailored nanostructures .
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DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2022
·
IF 4.383
Xu Ni,Jingjing Zhang,Linjie Zhao,Fangqi Wang,Hua He,Pierre Dramou
Magnetic iron oxide nanoparticles (MIONPs) possess the unique advantages of both magnetic features and nanomaterials . Using ferric trichloride hexahydrate and sodium acetate as crude materials, polyethylene glycol 1000 (PEG1000) as the surfactant , and ethylene glycol as the dispersion medium, Fe 3 O 4 nanoparticles were prepared by solvothermal method. Furthermore, through scanning electron microscope (SEM), high-resolution transmission electron microscope (HRTEM), vibrating sample magnetometer (VSM),X-ray diffractometer (XRD), synchronous thermal analyzer (TGA), Fourier transform infrared spectrometer (FT-IR), Zeta potentiometer, the structure, morphology and phase composition of MIONPs were characterized. Results evidenced that the particle size of MIONPs was inversely proportional to the specific surface area, and gradually increased until 8 h ( ca. 200–300 nm) when superparamagnetic iron oxide nanoparticles (SIONPs) clusters were obtained. This research has demonstrated a new way of viewing this synthesis procedure upon variation of time and subsequent features of clusters.
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DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2012
·Vol. 18
·期 49
·15676-15682
·
IF 5.925
Xiao-Jiao Kang,Yun-Lu Dai,Ping-An Ma,Dong-Mei Yang,Chun-Xia Li,Zhi-Yao Hou,Zi-Yong Cheng,Jun Lin
Graphical Dual response : Monodisperse poly(acrylic acid)-modified Fe 3 O 4 (PAA@Fe 3 O 4 ) hybrid microspheres with dual responses (magnetic field and pH) were successfully fabricated (see figure). The drug release behavior was strongly dependent on pH value due to the unique properties of PAA. Furthermore, doxorubicin (DOX)-loaded PAA@Fe 3 O 4 composites show an enhanced magnetically guided anticancer effect. Monodisperse poly(acrylic acid)-modified Fe 3 O 4 (PAA@Fe 3 O 4 ) hybrid microspheres with dual responses (magnetic field and pH) were successfully fabricated. The PAA polymer was encapsulated into the inner cavity of Fe 3 O 4 hollow spheres by a vacuum-casting route and photo-initiated polymerization. TEM images show that the samples consist of monodisperse porous spheres with a diameter around 200 nm. The Fe 3 O 4 spheres, after modification with the PAA polymer, still possess enough space to hold guest molecules. We selected doxorubicin (DOX) as a model drug to investigate the drug loading and release behavior of as-prepared composites. The release of DOX molecules was strongly dependent on the pH value due to the unique property of PAA. The HeLa cell-uptake process of DOX-loaded PAA@Fe 3 O 4 was observed by confocal laser scanning microscopy (CLSM). After being incubated with HeLa cells under magnet magnetically guided conditions, the cytotoxtic effects of DOX-loaded PAA@Fe 3 O 4 increased. These results indicate that pH-responsive magnetic PAA@Fe 3 O 4 spheres have the potential to be used as anticancer drug carriers.
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DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2021
·Vol. 35
·期 6
·1021-1030
·
IF 0.957
Wei Junchong,Long Xuejun,Wang Jia,Tang Zheng,Wang Tingting,Kang Hanyu,Liang Shuang
Artificial zeolite was modified by nano-Fe 3 O 4 for development of functional adsorbents. Subsequently, adsorbents such as calcium cross-linked nano-Fe 3 O 4 microspheres (Ca-MS), calcium cross-linked nano-Fe 3 O 4 modified zeolite microspheres (Ca-MZS) and iron cross-linked nano-Fe 3 O 4 modified zeolite microspheres (Fe-MZS) were prepared and compared for their adsorption performance. The effects of adsorbent dosage, solution pH, initial concentration and ion content on the removal of Cu 2+ from wastewater are investigated, and the adsorption kinetics and isotherms for the adsorbent materials were analyzed. The experimental results indicate that for the initial concentration of Cu 2+ of 30 mg/L, the adsorption is noted to be most stable. The optimal initial pH for adsorbing Cu 2+ is observed to be 5.5. At an optimal dosage of Ca-MZS of 900 mg/L, the adsorption capacity is measured to be 28.25 mg/g, along with the removal rate of 72.49%. The addition of Na + and K + affects the adsorption of Cu 2+ . For the Na + and K + concentration of 0.2 mmol/L, the Cu 2+ removal rate by Ca-MZS drops to 11.94% and 22.12%, respectively. As compared with the adsorbents such as Natural Zeolite (NZ), Ca-MS and Fe-MZS, Ca-MZS demonstrates the best removal effect in solution, where the removal rate reaches 84.27%, with the maximum adsorption capacity of 28.09 mg/g. The Cu 2+ adsorption kinetics of Ca-MZS is observed to follow the Elovich kinetic model, with the adsorption isotherm data fitting the Freundlich isotherm model by using the non-linear method.
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DOI
高影响因子
TALANTA
·
2020
·
IF 5.339
Ting Zhang,Lingli Lei,Meiling Tian,Junjie Ren,Zhisong Lu,Yang Liu,Yingshuai Liu
An ultrasensitive lateral flow immunoassay (LFIA) strip has been developed based on a multifunctional photothermal contrast Fe 3 O 4 @Au supraparticle (Fe 3 O 4 @Au SP) for quantitative Ochratoxin A (OTA) detection. The Fe 3 O 4 @Au SP composite not only shows a better photothermal effect over Fe 3 O 4 and gold nanoparticles , but possesses magnetic property and excellent ability to directly adsorb protein (antibody). Under 808 nm irradiation, photothermal images of the test strips are recorded by a portable Infrared thermal camera. A quantitative analysis is easily achieved based on the thermal changes, which are proportional to the concentrations of analytes. Under an optimal condition, a wide linear detection range from 1 pg mL⁻ 1 to 1μgmL⁻ 1 and a limit of detection (LOD) at 0.12 pg mL⁻ 1 have been achieved with OTA as a model analytes. The practical application potential has also been validated by detection of OTA in spiked corn , peanut, and soybean extractives with overall recoveries ranging from 98.6% to 115% and coefficient of variations (CVs) between 6.06% and 12.73%. The photothermal LFIA renders a rapid, sensitive, and quantitative bio-/chemo-sensing platform with only a portable laser source and a thermal camera.
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DOI
高影响因子
危险品化学品经营许可证（带存储）