JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Songhai Zheng,Liwei Su,Lihua Zheng,Hao Wu,Lianbang Wang,Hong Zhong,Manman Ren,Ming Li
SnO 2 is considered as an ideal substitute for graphite anode in lithium ion batteries since it has a four-fold theoretical capacity and low discharge potential. However, the poor transformation from Sn/Li 2 O to SnO 2 due to sluggish kinetic results in a low initial Coulombic efficiency (ICE) of only 52.4%. At the same time, the intrinsically low ionic/electronic conductivity and high volume swings during charge/discharge processes seriously limit its long-term stability and high-rate performance. Different from traditional strategies, nanotechnology and composite, this work prepares sub-10 nm SnO 2 /Fe 3 O 4 /graphene nanosheets with controllable Fe/Sn atomic ratios through a hydrothermal method to study the nanocatalytic effect of Fe on improving the ICE. The component, structure and lithium storage performance of the samples, with varied Sn/Fe ratios, are systematically investigated. The sample with Sn/Fe of 1.31 shows a high ICE of 70.9% (considering the negative effect of huge solid/electrolyte interface films, this value is quite high) and an outstanding reversible capacity of 1048 mA h g −1 after 800 cycles at the current density of 200 mA g −1 . The valence states of Sn and Fe before and after cycling are analyzed by X-ray photoelectron spectroscopy. Our findings offer new evidence for electrochemical catalytic conversion mechanism for lithium storage and highlight opportunities to boost the energy storage capability of the fourth main group compounds.
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高影响因子
ChemElectroChem
·
2019
·Vol. 6
·期 6
·1853-1860
·
IF 3.975
Wei Chang,Jin Qu,Shu-Meng Hao,Yu-Jiao Zhang,Zhi-Guo Jiang,Zhong-Zhen Yu
Till now, there are no systematic reports on the effect of the quality of thermally reduced graphene oxide (TRG) on lithium storage properties, as the reported methods to fabricate graphene-based electrodes are usually not effective enough to reduce graphene oxides to graphene. Herein, graphite oxide is thermally exfoliated and annealed with a high-temperature graphitization oven at different temperatures (800–2000 °C). A series of Fe 3 O 4 /TRG hybrids are synthesized as anode materials for lithium-ion batteries with TRGs acting as substrates of in-situ formed Fe 3 O 4 nanoparticles. Both, the electroconductivity of the TRGs and their interfacial interaction with Fe 3 O 4 influence the lithium storage performances of the hybrids. However, the electroconductivity of the TRGs and the formation of interfacial bonds are conflicting. Because the oxygen-containing groups and defects of TRG are greatly removed leading to enhanced electrical conductivity with the increase of thermal annealing temperature. Hence, the resulting Fe 3 O 4 /TRG hybrids show first decreased then increased electrochemical performances with increasing annealed temperatures. In a word, the effect of interfacial interaction is dominant at a relatively low annealing temperature, while the effect of conductivity is dominant at a relatively high annealing temperature. The optimized hybrids exhibit excellent cycling and rate performances. This work should provide useful information for the rational design and construction of high-performance electrodes for energy storage applications. Graphical Functional groups vs. conductivity : both the electroconductivity of thermally reduced graphene oxide (TRG) sheets and their interfacial interaction with Fe 3 O 4 nanoparticles influence the lithium storage performances of the synthesized hybrid material. However, the two key factors are conflicting. The effect of interfacial interaction is dominant at a relative low annealing temperature, while the effect of conductivity is dominant at a relative high annealing temperature.
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MATERIALS LETTERS
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2016
·
IF 2.437
Kaiqiang Zhou,Yichao Zhen,Zhensheng Hong,Juhua Guo,Zhigao Huang
Hierarchical Fe 3 O 4 hollow nanostructures are synthesized from the phase transition of Fe 2 O 3 hollow nanostructures, which are prepared through a dissolution-recrystallization process. The hierarchical Fe 3 O 4 hollow nanostructures, applied as an anode material for Na-ion batteries, display good rate capability and cycling stability. The reversible capacity of 150 mAh/g at 100 mA/g after 50 cycles can be maintained for Fe 3 O 4 anode. The superior Na-ion storage properties of hierarchical Fe 3 O 4 could be largely ascribed to the stable electrode structure during Na-ion insertion and extraction process. On the contrary, Fe 2 O 3 anode exhibits a high initial discharge capacity (686 mAh/g), but it suffers from poor cycling stability due to the remarkable pulverization of the electrode.
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高影响因子
RSC Advances
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2012
·Vol. 3
·期 4
·1082-1088
·
IF 0
Zhengping Dong,Xin Tian,Yuanzhe Chen,Yueping Guo,Jiantai Ma
In the present work, a novel dansyl group functionalized Fe3O4@SiO2 magnetic nanomaterial with a core–shell structure was developed, aiming to detect and remove Hg2+ from aqueous media. The multifunctional nanocomposite shows excellent fluorescence sensitivity and selectivity towards Hg2+ over other metal ions (Na+, K+, Mg2+, Al3+, Ca2+, Cd2+, Ni2+, Co2+, Fe3+, Zn2+, Pb2+, Cu2+, Ag+). Concentrations as low as 10−8 M can be detected and the addition of other metal ions has a negligible influence on the fluorescence emission. Regarding the reversibility of the nanosized sensor, the fluorescence of the DAP-Fe3O4@SiO2 nanocomposite in the presence of Hg2+ ions is found to be almost reversible when treated with iodide anion. Additionally, the nanocomposite can be easily separated from solutions by adding an external magnetic field. Moreover, the functionalized nanosphere shows a good adsorption capacity to Hg2+, which makes it repeatedly applicable for simultaneous Hg2+ sensing and removal from polluted water. These results indicate that the multifunctional nanocomposite may find potential applications for simple detection and easy removal of Hg2+ in biological and environmental areas.
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Scientific Reports
·
2017
·Vol. 7
·期 1
·7448
·
IF 4.259
Han Lina,Li Qinglian,Chen Shuai,Xie Wei,Bao Weiren,Chang Liping,Wang Jiancheng
A sort of magnetical material named Fe 3 O 4 –NH 2 –Pd was prepared by loading varying amounts of immobilizing Pd on the surface of the magnetic Fe 3 O 4 –NH 2 microspheres. This magnetical material was used firstly for capturing Hg° from coal derived fuel gas based on its recoverability. The experimental results showed that the loading Pd on the amine-functionalized magnetite nanoparticles can greatly improve the efficiency of removing Hg° at a high temperature range between 200 and 300 °C. The magnetic Fe 3 O 4 –NH 2 –Pd sorbent with 5% Pd loaded exhibited significantly high activity and stability in capturing Hg°, affording over 93% capture efficiency at 200 °C for more than 8 hrs. Compared to the Fe 3 O 4 –NH 2 sorbent that converted the Hg° as HgS, this Fe 3 O 4 –NH 2 –Pd sorbent can remove the Hg° by forming Pd-Hg amalgam and HgS. In addition, the experimental tests indicated that the as-synthesized Fe 3 O 4 –NH 2 –Pd sorbent still showed stable magnetic properties after two regeneration cycles in removing Hg°, which provided the opportunity for preparing a recyclable sorbent which can be easily separated and recovered for Hg° removal.
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高影响因子
NANO
·
2024
·
IF 1
Ying Zhou,Jinai Bian,Min Tian,Tingting Wang,Guomei Zhang,Yan Zhang,Caihong Zhang
Chronic ingestion of food containing clenbuterol (CLB) in the human body can cause acute poisoning. Thus, it is essential to develop a sensitive CLB detection way. Here, a novel electrochemical aptamer sensor based on aptamer/gold nanoparticles/amino magnetic ferric oxide/graphene nanosheets (aptamer/Au NPs/Fe 3 O 4 –NH 2 /GN) nanocomposite has been developed. The Fe 3 O 4 –NH 2 nanoparticles were self-assembled on GN, and then Fe 3 O 4 –NH 2 /GN nanocomposite was coated on the glassy carbon electrode (GCE) surface. Afterward, Au NPs were electrodeposited on Fe 3 O 4 –NH 2 /GN nanocomposite to fix the aptamer by the Au–S bonds. When CLB was added to the solution, the aptamer will specifically recognize CLB, causing current changes. Under the optimized conditions, the sensor shows better electrochemical performance (linear range is 1 × 1 0 − 1 3 M to 1 × 1 0 − 7 M, the detection limit is 1 . 1 6 × 1 0 − 1 4 M ( S / N = 3 )). It has been successfully applied to the detection of CLB in actual samples. The results show that the aptamer sensor has good selectivity, stability and repeatability, which will provide a novel idea for more sensitive and quicker CLB detection.
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高影响因子
Metals
·
2018
·Vol. 8
·期 9
·702
·
IF 1.704
Yuye Xie,Pengfei Yan,Biao Yan
An iron-based soft magnetic composite with Fe3O4-MnZnFe2O4insulation coating has been prepared by powder metallurgy method. This work investigated the microstructure and magnetic properties of Fe/Fe3O4-MnZnFe2O4powder cores. Scanning electron microscopy (SEM) coupled with an energy dispersive spectrometry (EDS) analysis indicated that the Fe3O4and MnZnFe2O4nanoparticles were uniformly coated on the surface of Fe powders. The co-existence of Fe3O4and MnZnFe2O4contributes to the preferable distribution of nano-sized insulation powders and excellent soft magnetic properties of soft magnetic composite (SMC) with high saturation magnetization Ms(215 A·m2/kg), low core loss (178.7 W/kg measured at 100 kHz, 50 mT), and high effective amplitude permeability of 114 (measured at 100 kHz). Overall, this work has great potential for realizing low core loss and outstanding soft magnetic properties of Fe-based powder cores.
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高影响因子
COMPOSITES COMMUNICATIONS
·
2026
·
IF 8.6
Wei Zhang,Zhiqin Zhao,Lanlan Wei,Kai Zhang,Min Shi,Yang Chen,Lijun Wang
Microcellular polymer composites with an excellent conductivity are greatly desired for electromagnetic interference (EMI) shielding applications, but it still remains a great challenge to fabricate conductive composite foams with intelligent EMI shielding performance at minimal amounts of functional filler. Herein, a novel and facile technology is developed for in-situ creating poly(3,4-ethylenedioxythiophene)/ferroferric oxide (PEDOT/Fe 3 O 4 ) in the closed-cells of bulk epoxy foams without sacrificing the lightweight and mechanical properties. Via vapor phase polymerization of EDOT monomer using FeCl 3 as oxidant and followed by alkali treatment, the in-situ generated PEDOT/Fe 3 O 4 composites densely pack at the inner walls of closed-cells to form the highly conductive islands. These islands are linked by the nanofiller/PEDOT conductive chains in cell walls, thus constructing the unique “island-chain” segregated conductive nanostructure. This architecture endows the resultant composite foams with good conductivity, outstanding EMI shielding effectiveness, highly effective absorbance (A eff ), epsilon-negative (ε′ < 0) response and considerable compressive strength, showcasing obvious advantages as compared to conventional design in open-cells. Moreover, these functional composite foams display a repeatably pH-sensitive EMI shielding performance with a significant difference of 14 dB, providing a potential approach for intelligent EMI shielding.
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高影响因子
Journal of Cleaner Production
·
2026
·
IF 10.7
Mengmeng Kong,Hairong Jing,Wenrui Li,Huilian Xu,Xiaoyong Liu,Yu Shen
Conventional rice production through excessive chemical inputs violates cleaner production principles, with disease-susceptible varieties requiring 40% more agrochemicals while experiencing 10-30% yield losses. This study investigates Fe 3 O 4 nanoparticles as a potential cleaner production technology for sustainable rice enhancement through precision metabolic intervention. Applying 0.5 mg/L magnetite nanoparticles (5 nm) to rice achieved remarkable growth promotion: 193.44% shoot height enhancement and 74% root elongation using 50% less iron than conventional FeCl 3 , representing substantial improvements in nutrient utilization efficiency compared to traditional fertilizers. Metabolomics analysis (2085 metabolites) revealed mechanisms enabling this efficiency transformation: biphasic metabolic reprogramming from anabolic activation (0-48h) to defense priming (48-72h) avoided growth-defense trade-offs, while coordinated hormone regulation maximized resource utilization. The narrow optimal concentration (0.5 mg/L) demonstrates precision delivery advantages, eliminating wasteful over-application common in conventional approaches. Twenty metabolic pathways showed coordinated reorganization, enabling multifunctional benefits from single intervention. Unlike conventional fertilizers causing nutrient runoff and soil degradation, nanoparticles provide controlled release with potential for reduced environmental contamination. These findings establish nanotechnology-enabled approaches as potentially viable for sustainable rice production, offering pathways to while enhancing productivity. The demonstrated 50% reduction in iron requirements combined with growth enhancement provides molecular foundations for future assessment of Fe 3 O 4 nanoparticles in sustainable rice production systems, directly supporting efforts toward responsible agricultural production and food security.
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高影响因子
Journal of Macromolecular Science Part B-Physics
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2026
·
IF 1.4
Suwei Gao,Yucheng Wang,Liang Li,Xi Wang,Qiaofeng Wei,Shuyue Zhu,Rangtong Liu
The development of high-performance electromagnetic wave (EMW) absorbing materials aims to achieve high-intensity electromagnetic attenuation and wide effective absorption bandwidth (EAB), but in fact, it is challenging for them to optimize synchronously. In this paper, through the hydrothermal method, an EMW absorber was synthesized by loading nanomagnetic Fe3O4 on multi walled carbon nanotubes (MWCNTs), of which the structure and properties depend on precursor (FeCl3·6H2O) addition and MWCNTs modification. Using this absorber, a coating named Fe3O4/MWCNTs/WPU with good EMW absorption performance was prepared with waterborne polyurethane (WPU). By characterizing the structure and properties of the absorbers and coatings, it was found that the optimal distribution of Fe3O4 particles presented when adding 1.0 g FeCl3·6H2O. After MWCNTs acidizing modification, Fe3O4 particles present on them with a “bead-chain” like uniformly dense structure, and the coating exhibited a wider EAB of 8.64 GHz at a thickness of 3.0 mm and a smaller reflection loss of −52.61 dB at a thickness of 4.0 mm. These findings effectively achieve the balance between EAB and intensity of EMW, and reveal some principles for optimizing electromagnetic absorption, providing important basis for designing new materials with wide bandwidth and strong absorption capacity.
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高影响因子
Desalination and Water Treatment
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2024
·
IF 1
Xuezhen Feng,Yakun Zhang,Chunyan Liang,Jingang Yu,Xinyu Jiang
A novel adsorbent, poly-(dimethyl diallyl ammonium chloride) (PDDA) functionalized graphene oxide (GO) further decorated with ferro ferric oxide (Fe 3 O 4 ) nanoparticles, has been developed and used for instantaneous Cr(VI) removal from aqueous solution, and a reliable direct filtration-adsorption was achieved. Fourier transform infrared (FTIR) spectroscopy, Raman spectra (Raman), zeta potential measurement, scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS) and differential pulse voltammetry (DPV) were adopted to confirm and investigate the chemical compositions, surface properties, morphological and electrochemical performance of the as-prepared magnetic nanocomposite (denoted as GO/PDDA/Fe 3 O 4 ). The maximum adsorption capacity of GO/PDDA/Fe 3 O 4 for Cr(VI) was 141.68 mg/g at pH = 2, and the desorption-regeneration results exhibited GO/PDDA/Fe 3 O 4 could be a potential prospective nanocomposite used for instaneous filtration-adsorption of Cr(VI) from aqueous solution in real-life situations due to its fast, effective and stable properties.
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高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 9
·596
·
IF 5.4
Wang Wenzhuo,Lu Juan,Jiang Hanyue,Han Pengfei,Ma Guangping,Li Ruixin,Mao Huiyuan,Ma Tengying,Wang Jing,Chen Ruizhan,Tian Li
A dual-mode sensing platform has been developed for ultrasensitive malathion (MAT) detection based on bifunctional rGO@ZnO/Zn-Fe 3 O 4 composites (reduced graphene oxide-supported ZnO nanorods and Zn-doped Fe 3 O 4 microspheres). The rGO@ZnO/Zn-Fe 3 O 4 nanozyme is fabricated via a one-pot hydrothermal strategy and integrates favorable electrochemiluminescence (ECL) emission and intrinsic peroxidase-mimicking activity to realize dual-signal readout. In the K 2 S 2 O 8 ECL system, Au NPs@UiO-66 serves as a coreactant booster to further magnify the ECL intensity of the composite. Meanwhile, the nanozyme catalyzes the H 2 O 2 -mediated oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) to produce a colorimetric response. MAT suppresses both ECL and colorimetric responses by occupying Fe 2+ /Fe 3+ catalytic sites and scavenging of reactive radicals. The sensor achieves limits of detection as low as 2.8 × 10 –13 mol/L under ECL mode and 1.32 × 10 –6 mol/L under colorimetric mode. In practical testing of MAT-spiked vegetable samples, the sensor exhibits acceptable recoveries and low relative standard deviations, demonstrating its practicability for field food safety supervision and rapid pesticide residue screening. Graphical abstract
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高影响因子
危险品化学品经营许可证（带存储）