CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Huayu Wu,Mohan Yue,Lin He,Miao Zhang,Yimin Huang,Chang Sun,Yu Liu,Jindi Wang,Rongguan Lv,Rong Xing
A nanofiber necklace with a box-shaped structure has been designed. The box-shaped template can introduce other transition metal compounds, effectively compensating for the intrinsic defects of electrode materials. α-Fe 2 O 3 nano cubes as the template mix with PAN to get α-Fe 2 O 3 /PAN. And then the α-Fe 2 O 3 nano cubes calcine to form Fe 3 O 4 with more valence state under high temperature, which get the box-shape necklace-like structure Fe 3 O 4 -CNFs. The confined space has formed by high concentrated HCl etching, the box-shaped necklace-like Fe 3 O 4 /MoS 2 carbon nanofibers (BN Fe 3 O 4 /MoS 2 -CNFs) anode material is obtained by hydrothermal method of confining growth of MoS 2 nanosheets. The mixed valence state of Fe 3 O 4 (Fe 3+ /Fe 2+ ) can effectively improve the conductivity of MoS 2 nanosheets. The box-shape necklace structure constructed by α-Fe 2 O 3 nanocube has mesoporous structure and confined space, which can alleviate the volume effect of electrode material. When the electrode material is applied to the SIBs, the reversible capacity is 354 mA h g −1 after 500 cycles at 0.5 A/g, and the specific capacity of 131.5 mA h g −1 can be maintained at 8 A/g. On the one hand, the heterogeneous structure in the confined space alleviates the volume effect of the material, thereby improving the long cycle performance, on the other hand, it effectively enhances the electrical conductivity and increases more lithium/sodium storage sites.
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高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2012
·Vol. 64
·期 2
·347-357
·
IF 1.632
Zhang Jian-Ming,Zhai Shang-Ru,Zhai Bin,An Qing-Da,Tian Ge
Multifunctional nanomaterials with task-specific physicochemical properties, especially core–shell nanostructures with Fe 3 O 4 core and NH 2 -functional shells (Fe 3 O 4 @SiO 2 –NH 2 ), have been extensively investigated as high-performance adsorbents, catalysts and catalyst supports; and in most cases the controllable sol–gel technique is the choice for fabrication of this kind of widely applied materials. Herein, we demonstrated that mono-dispersed and spherical Fe 3 O 4 @SiO 2 –NH 2 nanomaterials with magnetic response core, NH 2 -functional shell structure can be facilely prepared by co-condensation of TEOS with APTMS using a versatile sol–gel process. It was shown that the proper usage of APTMS and appropriate pre-hydrolysis time of TEOS were crucial and key steps for formation of highly uniform and desirable amino loading Fe 3 O 4 @SiO 2 –NH 2 materials. The TEOS pre-hydrolysis and the critical time (around 90 min) before the addition of APTMS prove to be vital for uniform structure evolution, while the appropriate concentration of APTMS (~2.28 mmol L −1 in our system) leads to well-dispersed materials with relatively high loading of amino functionality. The as-prepared Fe 3 O 4 @SiO 2 –NH 2 magnetic nanoparticles prepared under optimum conditions possessing superparamagnetic behavior, uniform core–shell structure (~200 nm in diameter), relatively large BET surface area (~138 m 2 /g) and high incorporation of amino-functionality (~2.90 wt %).
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2012
·
IF 2.105
Jingheng Deng,Xianghua Wen,Qinian Wang
Fe 3 O 4 -multi-walled carbon nanotubes (Fe 3 O 4 -MWCNTs) hybrid materials were synthesized by a solvothermal process using acid treated MWCNTs and iron acetylacetonate in a mixed solution of ethylene glycol and ultrapure water. The materials were characterized using X-ray powder diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy, and vibrating sample magnetometry. The results showed that a small amount of water in the synthesis system played a role in controlling crystal phase formation, size of Fe 3 O 4 , and the homogeneous distribution of the Fe 3 O 4 nanoparticles deposited on the MWCNTs. The Fe 3 O 4 nanoparticles had diameters in the range of 4.2–10.0 nm. They displayed good superparamagnetism at room temperature and their magnetization was influenced by the reaction conditions. They were used as a Fenton-like catalyst to decompose Acid Orange II and displayed a higher activity than nanometer-size Fe 3 O 4 .
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Coatings
·
2024
·Vol. 14
·期 6
·685
·
IF 2.9
Ping Xu,Xin Chen,Jie Chen,Shihua Yu,Xiaodan Zeng,Zhigang Liu
Cu2+has increasingly become a great threat to the natural environment and human health due to its abundant content and wide application in various industries. DL-Mercaptosuccinic acid and ZnS-modified Fe3O4nanocomposites were designed, synthesized, and applied in the determination of Cu2+. The prepared nanocomposites were characterized by scanning electron microscopy (SEM), transmission electron microscopes (TEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM), and thermogravimetric analyzer (TG). The magnetic fluorescent nanoprobe exhibited highly selective and sensitive fluorescence-quenching characteristics with Cu2+ions. The fluorescence detection linear range was 0–400 μM, with the detection limit being 0.489 μM. In addition, the magnetic fluorescent nanoprobe exhibited a high adsorption and removal rate for Cu2+. It had been successfully applied to detect Cu2+in real water samples with a satisfactory recovery rate. The magnetic fluorescent nanoprobe could simultaneously realize the functions of enrichment, quantitative detection, and separation, reduce the pollution of copper ions and probes, and establish an environment-friendly detection method. Consequently, the magnetic fluorescent nanoprobe offered a new pathway for the removal and detection of not only Cu2+but also other heavy metal ions in water.
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高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Hong Chen,Junyan Liu,Mengna Wan,Shangyi Zhao,Xiaolong Li,Chuan Liu,Xuanping Zhao,Junjie Li,Qingzhen Ma,Cuixiang Li,Xueqin Wang
Fruit juice is kind of popular beverage food worldwidely, and its total antioxidant capacity (TAC) is generally considered as an important index for people’s rational diet, thus accurate evaluation of its TAC is essential for human health guidance. Herein, we constructed a sensitive Fe 3 O 4 @MnO 2 nanocatalyst that was delicately cored with magnetite nanoparticles (Fe 3 O 4 NPs) and encapsulated with manganese dioxide (MnO 2 ) nanoshells for fast and accurate TAC colorimetric analysis in fruit juice. The data showed the fabricated Fe 3 O 4 @MnO 2 nanocatalysts performed with remarkable oxidase mimetic activities and could catalyze oxidization of colorimetric substrate without additional H 2 O 2 , and the limit of detection (LOD) was about 0.39 μM for ascorbic acid (AA) evaluation. Applied in commercial fruit juice products, the fabricated Fe 3 O 4 @MnO 2 nanocatalysts showed a reliable and visual assessment for the accurate TAC analysis. In addition, the fabricated Fe 3 O 4 @MnO 2 nanocatalysts could be easily recycled due to their intrinsic superparamagnetic property. Together, an intellegent Fe 3 O 4 @MnO 2 nanocatalyst was well developed for visual TAC analysis in fruit juice with convenient applications in future.
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Materials
·
2025
·Vol. 18
·期 1
·151
·
IF 3.2
Jiaxing Cai,Yunye Cao,Bingfei Yang,Jiajie Li,Michael Hitch
This study presents a novel Fe3O4/C composite material synthesized from red mud through a process of magnetic roasting and separation. The research explores the impact of Fe3O4/C dosages, sodium persulfate (PS) concentrations, and initial solution pH on the chemical oxygen demand (COD) removal efficiency using Acid Orange 7 as a model pollutant. Optimal conditions were identified as 3 g/L Fe3O4/C, 20 mM PS, and an initial pH of 2, achieving a 94.11% COD removal efficiency within 30 min. X-ray diffraction and photoelectron spectroscopy analyses confirmed that the magnetization roasting process effectively transformed red mud’s ferric oxide (Fe2O3) into magnetite (Fe3O4). Concurrently, Fe3O4interacted with residual carbon to form the Fe3O4/C composite. This composite demonstrated superior catalytic performance, along with excellent recyclability and reusability.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yaru Sun,Yan Liu,Yanyan Zou,Jun Wang,Fan Bai,Junbo Yan,Fenglei Huang
In this work, novel core–shell Fe 3 O 4 nanoparticles were prepared by self- assembly technology using phytate-melamine aggregates (PM) or phytate-melamine-Fe 3+ aggregates (PM-Fe) as building block. A polyurea (PUA) matrix was filled with magnetic nanoparticle. The influence of Fe 3 O 4 , Fe 3 O 4 @PM or Fe 3 O 4 @PM-Fe content and dispersion on the mechanical and electromagnetic wave (EMW) absorption properties of PUA composite were investigated. Good dispersion of modified Fe 3 O 4 in PUA matrix was obtained. Loading well-dispersed Fe 3 O 4 significantly enhanced the mechanical properties of their PUA nanocomposite under quasi-static tensile, nanoindentation, and dynamic compression tests. Excellent EMW absorption performance of PUA/Fe 3 O 4 @PM nanocomposite was desired. Although well-dispersed Fe 3 O 4 @PM could effectively enhance the mechanical properties, nonetheless it surprisingly plays a negative role in the EMW absorption performance. The Fe 3 O 4 @PM with high dispersion and interfacial compatibility in the PUA matrix was detrimental to EMW absorption performance, which contradicts the well accepted EMW absorption mechanisms. A novel mechanism and model were suggested, along with a fresh understanding of the role of Fe 3 O 4 in the EMW absorption of PUA composite. Furthermore, the Fe 3 O 4 @PM-Fe, obtained by constructing a conductive network on the surface of Fe 3 O 4 @PM, was used to investigate this assumption. The radar cross section simulation also demonstrated the superior EMW attenuation capability of PUA nanocomposites in the service condition. This work is beneficial to the development of EMW absorber, not limited to Fe 3 O 4 magnetic nanoparticles.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Zhihao Xu,Hezhong Ouyang,Haoda Zhang,Lei Sun,Shasha Li,Ruijiang Liu
A highly sensitive label-free electrochemical aptamer biosensor with magnetically induced self-assembly had been developed to detect gastrin-releasing peptide precursor (ProGRP), which is not only a highly specific tumour marker for small-cell lung cancer (SCLC), but also very stable in serum, and thus had robust clinical utility. Based on the advantages of high specific surface area and facile separation and recycling, magnetic α-Fe 2 O 3 /Fe 3 O 4 nanorods with the average length of 175 nm, the average diameter of 28 nm, and the saturation magnetization of 66.9 emu/g were used as the matrix, and Au nanoparticles (AuNPs) were loaded on the surfaces of the nanorods to enhance the electrochemical signal. The aptamer double-stranded probe with high specificity to the target protein was bound to the surface of α-Fe 2 O 3 /Fe 3 O 4 @Au. The thiol-modified oligonucleotides could quickly and stably bind to AuNPs to form Au-S, which provided a guarantee for the immobilization of the probe and the controllable self-assembled molecular layer. Then, the sensor after capturing the target was self-assembled on the surface of the magnetic glassy carbon electrode (MGCE) by liquid phase incubation for electrochemical detection. The construction and detection performance of the sensor were evaluated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV). Under the optimized conditions, the sensor had remarkable linearity in the range of 0.1 pg/mL - 100 ng/mL (R 2 = 0.998), the limit of detection (LOD) was 17.51 fg/mL, while the limit of quantitation (LOQ) was 58.39 fg/mL. Additionally, the biosensor had excellent stability, reproducibility and anti-interference ability, as well as satisfactory recovery in spiked serum samples (99.46 %–103.32 %).
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Wenlong Qin,Haoran Yu,Lei Yue,Qianying Lin,Zhenwei Qin,Guowei Qin
In this study, the composite solutions of wormlike micelles and polymer-based nanoparticles were investigated to explore their synergistic drag reduction performance. The polymer-based nanoparticles (PAM-AMPS/Fe3O4 NPs) were prepared via emulsion polymerization. The chemical composition and microstructure of the PAM-AMPS/Fe3O4 NPs were characterized using Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). In addition, the shear-induced properties and drag reduction performance of the composite solution in brine were systematically investigated. The results show that the prepared PAM-AMPS/Fe3O4 NPs have a nanocluster structure with sizes ranging from 100 to 500 nm. The grafting content and viscosity average molecular weight of PAM-AMPS on the nanoparticles’ surface are 78.88% and 4.99 × 106 g/mol, respectively. The nanoparticles with high-molecular-weight polymers are suitable for use as a drag reducer. The composite solutions exhibit stronger shear-induced structure (SIS) compared to the pure wormlike micelle solution of cetyltrimethyl ammonium chloride/sodium salicylate (CTAC/NaSal) and the pure polymer-based nanoparticles solution. This is attributed to the formation of reinforced concrete structure by the wormlike micelles and polymer-based nanoparticles. The SIS of the composite solution containing 100 mg/L CTAC/NaSal and 30 mg/L PAM-AMPS/Fe3O4 NPs remains even at 20,000 mg/L NaCl, showing excellent salt resistance. Furthermore, the pure wormlike micellar solution shows low drag reduction and a narrow effective Reynolds number range in the drag reduction experiment at 5000 mg/L NaCl. In contrast, the composite solution achieves a maximum drag reduction of 56.16% and an effective Reynolds number range of 4000–30,000, indicating that the combination of polymer-based nanoparticles and wormlike micelles produces a remarkable synergistic drag reduction effect. This study demonstrates that the composite solution holds great potential as a drag reducer for brine pipeline transport.
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高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Zahra Nozhat,Shibo Wang,Asim Mushtaq,Tianhao Deng,M. Zubair Iqbal,Xiangdong Kong
Recently, nanoparticles (NPs) have been employed to enhance the distribution of new medications across the BBB. In this study, a synergistic nanoassembly has been prepared for magnetic resonance imaging-guided chemo-phototherapy of glioblastoma multiforme (GBM). In accordance, Fe 3 O 4 NPs are prepared with SiO 2 shell followed by the loading of an anticancerous drug temozolomide (TMZ) to generate Fe 3 O 4 @SiO 2 /TMZ NPs. Later, drug-loaded NPs are coated with platelet membrane (PLTM) to develop the final biocompatible form of nanoassembly as Fe 3 O 4 @SiO 2 /TMZ@PLTM NPs for synergistic therapy of GBM. We combined chemotherapy with photothermal therapy in a magnetically targeted TMZ-loaded Fe 3 O 4 @SiO 2 core-shell that was activated by near-infrared irradiation and then developed platelet membrane-coated Fe 3 O 4 @SiO 2 /TMZ to improve the precise delivery of drugs into GBM cells and enable a more efficient photothermal therapy. According to the cellular uptake findings, the Fe 3 O 4 @SiO 2 /TMZ@PLTM NPs possess a greater uptake compared to the uncoated Fe 3 O 4 @SiO 2 /TMZ NPs owing to the targeted binding of P-selectin on the surface of the PLTM to the CD44 receptors of GBM cells. Moreover, the nanoassembly has displayed a pH-responsive drug release and an excellent photothermal effect under NIR (808 nm, 1 W/cm 2 ) irradiation. After 10 min of irradiation, the temperature has been elevated to about 65 °C leading to the death of 80% of GBM cells in vitro. Additionally, the fabricated NPs possess a remarkable contrasting property for T 1 -weighted magnetic resonance imaging (MRI) due to the presence of superparamagnetic iron oxide NPs. These findings demonstrate the promising theranostic behaviour of fabricated Fe 3 O 4 @SiO 2 /TMZ@PLTM NPs for synergistic therapy of glioblastoma multiforme (GBM).
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Separations
·
2025
·Vol. 12
·期 8
·205
·
IF 2.7
Yannan Lv,Shenrui Han,Wenqing Wen,Xinzhu Bai,Qiao Sun,Li Chen,Haonan Zhang,Fansong Mu,Meng Luo
This study developed a new magnetic adsorbent from waste coconut shells using high-temperature carbonization, EDTA-2Na chelation, and Fe3O4magnetic loading. Response surface methodology optimized the preparation conditions to a mass ratio of activated carbon: EDTA-2Na:Fe3O4= 2:0.6:0.2. Characterization (SEM, XRD, FT-IR, and EDS) showed that EDTA-2Na increased the surface carboxyl and amino group density, while Fe3O4loading (Fe concentration 6.83%) provided superior magnetic separation performance. The optimal adsorption conditions of Cu2+by EDTA-2Na-Fe3O4-activated carbon composite material are as follows: when pH = 5.0 and the initial concentration is 180 mg/L, the equilibrium adsorption capacity reaches 174.96 mg/g, and the removal rate reaches 97.2%. The optimal adsorption conditions for Pb2+are as follows: when pH = 6.0 and the initial concentration is 160 mg/L, the equilibrium adsorption capacity reaches 157.60 mg/g, and the removal rate reaches 98.5%. The optimal adsorption conditions for Cd2+are pH = 8.0 and an initial concentration of 20 mg/L. The equilibrium adsorption capacity reaches 18.76 mg/g, and the removal rate reaches 93.8%. The adsorption followed the pseudo-second-order kinetics (R2> 0.95) and Langmuir/Freundlich isotherm models, indicating chemisorption dominance. Desorption experiments using 0.1 mol/L HCl and EDTA-2Na achieved efficient desorption (>85%), and the material retained over 80% of its adsorption capacity after five cycles. This cost-effective and sustainable adsorbent offers a promising solution for heavy metal wastewater treatment.
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高影响因子
ACS Omega
·
2024
·
IF 3.7
Nana Sun,Huina Sun,Jianbo Hu,Shiqi Xu,Lisha Shen,Yuli Ma
In this study, cationic polyacrylamide (CPAM)-coated magnetic nanoparticles (MNPs) Fe3O4@CPAM were synthesized for treating heavy O/W emulsions. This Fe3O4@CPAM was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and vibrating sample magnetometry (VSM) techniques, and its synergistic performances with microwaves were evaluated in detail with respect to the microwave radiation power, radiation time, and magnetic nanoparticle concentration. On this basis, the distribution of oil droplets and the wettability and chargeability of magnetic nanoparticles were measured without or with microwave radiation using biomicroscopy, contact angle measurement instrument, and a ζ-potential analyzer, thus revealing the synergistic demulsification mechanism between microwave and magnetic nanoparticles. The results showed that excessively high or low microwave radiation parameters had an inhibitory effect on the magnetic nanoparticle demulsification, and microwave promoted the magnetic nanoparticle demulsification only when the radiation parameters were in the optimal range. In addition, the water separation rate showed an increasing and then decreasing trend with the increase of magnetic nanoparticles concentration, with or without microwave action. As an example, the water separation rate of the emulsion for 1 h was 21.34% when the Fe3O4 concentration was 175 mg/L without microwave action, while it increased to 55.56% with microwave action. In contrast, when the concentration of Fe3O4@CPAM was 175 mg/L, the water separation rate was 42.86% without microwave radiation, while it was further increased to 77.38% under microwave radiation. These results indicate that magnetic nanoparticles and their complexes significantly affect the water separation process under different conditions. There is a more obvious coupling synergistic effect between Fe3O4@CPAM and microwave. This was due to the lower absolute potential of Fe3O4@CPAM and its higher hydrophobicity.
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高影响因子
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