IONICS
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2023
·Vol. 29
·期 9
·3573-3584
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IF 2.8
Zhang Canping,Zhou Qin,Wang Hairui,Liu Jianwen,Zhang Yanqing,Wang Shiquan
Fe 3 O 4 and Fe 3 O 4 /NiO heterostructures were successfully prepared by a simple one-step solvothermal method. The morphology of Fe 3 O 4 /NiO heterostructures is flower-like spheres composed of nanosheets with a thickness of 10–20 nm. As anode material for lithium-ion batteries (LIBs), the electrochemical performance of the Fe 3 O 4 and Fe 3 O 4 /NiO heterostructures are comparatively investigated. At current density of 100 mA g −1 , the Fe 3 O 4 /NiO heterostructures can maintain 1021 mAh g −1 after 100 cycles. The discharge capacity can still maintain at 500 mAh g −1 and the coulomb efficiency is always stable at 99.6% after 1000 cycles at 1 A g −1 . The Fe 3 O 4 /NiO heterostructures also have lower impedance and better rate capability, compared with the bare Fe 3 O 4 electrode. Moreover, the electrochemical properties of the Fe 3 O 4 /NiO heterostructures can be further improved when the new binder CMC-Li is used. At 100 mA g −1 , it can still maintain 1544 mAh g −1 after 100 cycles. These loose-layered nanosheets can effectively alleviate the volume expansion of materials in the process of charge and discharge. Meanwhile, the large surface area can provide more reaction sites. The ultra-thin nanosheet can also reduce the diffusion distance of lithium ions, so that the Fe 3 O 4 /NiO heterostructures have excellent performance in lithium-ion batteries.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 2
·1-10
·
IF 2.8
Gao Lingxiang,Zhang Hao,Liu Wen,Zhang Shulong,Xie Zunyuan
In this study, electro and magneto dual response of TiO 2 @Fe 3 O 4 composite nanoparticles is realized by situ-generating Fe 3 O 4 , which was synthesized by FeCl 3 and FeSO 4 , on rose-like TiO 2 pore in virtue of facile hydrothermal reaction. Morphology, structure and physical properties, such as dielectric constant and magnetic conductivity, of the TiO 2 @Fe 3 O 4 composite particles were characterized. The particles were dispersed in hydrous elastomer to measure their electro and magneto responsive property by the scanning electron microscopy of micro structure of hydrous elastomer and dynamic mechanical analysis that reflected by the sensitivity of the increase in storage modulus ( f = ∆ G / G ) of the hydrous elastomer cured in the absence/presence of external field. The one of the TiO 2 @Fe 3 O 4 particles consisting of the ratio of TiO 2 :Fe 3 O 4 to 2:1 has the highest electro and magneto dual responsive effect that reaches 62%, which is far higher than TiO 2 with only 15%. This work provides a new substance shows the excellent performance of electro and magneto dual response to applied in smart material field.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
TALANTA
·
2019
·
IF 4.916
Najing Fu,Liteng Li,Kaijing Liu,Chan Kyung Kim,Jun Li,Tao Zhu,Jianheng Li,Baokun Tang
With the development of deep eutectic solvents (DESs), more DES-based functional materials have been explored and applied in various areas. In this work, a novel choline chloride-acrylic acid (ChCl-AA) DES polymer, on a 2D magnetic base, was prepared for the recognition of β-lactoglobulin (β-LG) biomacromolecules in milk and for the inhibition of common bacteria such as Escherichia coli ( E. coli ), Pseudomonas fluorescens ( P. fluorescens ), Staphylococcus aureus ( S. aureus ), and Bacillus subtilis ( B. subtilis ). The ChCl-AA DESs were polymerized on the surface of 2D MoS 2 sheets doped with nano Fe 3 O 4 particles, and the resulting polymer was abbreviated poly(ChCl-AA DES)@Fe 3 O 4 @MoS 2 . The free energy (ΔG=−92) of ChCl-AA DES was calculated using the Gaussian software, the composition and structure of poly(ChCl-AA DES)@Fe 3 O 4 @MoS 2 were characterized by field emission scanning electron microscopy , transmission electron microscopy , etc ., the qualitative and quantitative analyses of β-LG were done by fluorescence spectra , sodium dodecyl sulfate polyacrylamide gel electrophoresis and high performance liquid chromatography, and the bioactivity of bacteria was analyzed by flat colony counting. Based on the present analysis, poly(ChCl-AA DES)@Fe 3 O 4 @MoS 2 specifically recognized β-LG in a good fitting Langmuir isotherm (R 2 = 0.9909) and second-order kinetic model (R 2 = 0.9989) by affinity, and evidently inhibited three bacteria, namely, E. coil (65%), S. aureus (50%), and B. subtilis (54%), effectively reducing the relative colony number. As the poly(ChCl-AA DES)@Fe 3 O 4 @MoS 2 material did not only exhibit specific recognition of biomacromolecules, but also had an antimicrobial effect against common bacteria, it could be an ideal separation media or carrier for biomacromolecules in real samples.
研究领域:
生物化学
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材料科学
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食品科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Feng Li,Wenxi Zhu,Shanshan Jiang,Yue Wang,Hua Song,Cuiqin Li
In this study, magnetic Fe 3 O 4 modified Ru/Carbon nanotubes (CNTs) catalysts were used to achieve the catalytic transfer hydrogenation of furfural (FF) to furfuryl alcohol (FFA), with alcohols as the solvent and hydrogen donors . According to the result of the catalyst characterization, Fe 3 O 4 promoted the formation of Ru 0 species. The effects of Fe 3 O 4 loading and different hydrogen donors on the catalytic transfer hydrogenation of FF were tested, and the reaction parameters and catalyst stability were also analyzed. It is found that Fe 3 O 4 effectively enhanced the activity of Ru/CNTs in catalytic transfer hydrogenation of FF, the catalytic activity was optimized at the Fe 3 O 4 loading of 5 wt%, and the optimal hydrogen donor was i -propanol. Moreover, the Ru–Fe 3 O 4 /CNTs could be easily collected for further use and possessed excellent stability. The mechanism of the catalytic transfer hydrogenation of FF using Ru–Fe 3 O 4 /CNTs was discussed, and the corresponding catalyst activity groups included metal Ru sites and RuO x -Fe 3 O 4 Lewis acid sites, which account for the excellent catalytic activity of transfer hydrogenation.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2024
·
IF 3.5
Zhang Meng
In the current work, a magnetic nanocomposite containing carbon nanotubes (CNT), starch, and Fe 3 O 4 was synthesized to decontaminate lead (Pb 2+ ) and cadmium (Cd 2+ ) ions from water. The properties of magnetic nanocomposite (CNT/starch/Fe 3 O 4 ) were determined using X-ray diffraction (XRD), vibrating sample magnetometer (VSM), Brunauer–Emmett–Teller (BET), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray (EDX), and mapping techniques. The value of the BET area and magnetic saturation for the nanocomposite were 54.18 m 2 /g and 28.36 emu/g, respectively. The maximum removal of Pb 2+ (99.74%) and Cd 2+ (98.76%) was attained at 25 °C, decontamination duration of 50 min, a metal content of 10 mg/L, composite mass of 1 g/L, and pH 6 (for Pb 2+ ) and 7 (for Cd 2+ ). The pseudo quadratic model had a more significant potential to describe the metal removal behavior as it has a lower RMSE and a higher R 2 than other models. The intraparticle penetration model revealed that more than one mechanism is effective in adsorption. The adsorption process data obeyed the Langmuir model with a q m factor of 50.36 mg/g (Pb 2+ ) and 44.72 mg/g (Cd 2+ ). The E value was determined to be < 8 kJ/mol, which indicates that the process is physical. The metal removal using the CNT/starch/Fe 3 O 4 composite was spontaneous and exothermic, and during adsorption, the random interactions between the composite and metal ions were reduced. The outcomes showed that the desired adsorbent can absorb and desorb Pb 2+ and Cd 2+ and can be used as an effective adsorbent in cleaning aqueous solutions containing heavy metal.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 17
·8083-8089
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IF 3.3
Zhaofei Liu,Lili Zhang,Yuhang Wei,Zhiming Chen
Rapid and sensitive detection of hazardous compounds is of great importance for sensors. This work presents the immobilization of laccase on Fe3O4@MF-CNTs nanocomposites (Fe3O4@MF-CNTs-lac) for the fast and sensitive detection of catechol. Electrochemical impedance spectroscopy (EIS) results revealed that the combined effect of Fe3O4@MF and carbon nanotubes (CNTs) facilitates electron transfer between laccase and the electrode. Amperometric curves indicated that the Fe3O4@MF-CNTs-Lac biosensor can respond rapidly to a substrate and detect catechol within 0.5 s. The Fe3O4@MF-CNTs-Lac biosensor possesses a low detection limit of 0.84 μM (S/N = 3) with a linear range of 1–3000 μM, as well as high sensitivity, remarkable organic compound tolerance, and good selectivity, reproducibility and stability. The catechol biosensing assays revealed that Fe3O4@MF-CNTs-Lac can be operated in acidic water environments. Most importantly, the Fe3O4@MF-CNTs-Lac biosensor exhibited reliable results in real water sample analysis. The outstanding biosensing performances reveal that the Fe3O4@MF-CNTs-Lac biosensor has a technical application in the treatment of catechol to avoid catechol pollution.
研究领域:
环境科学
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生物技术
·
电化学
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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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.
研究领域:
材料科学
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生物医学工程
·
药学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
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2019
·
IF 2.687
Yanlin Li,Wenyuan Duan,Xuegang Lu,Sen Yang,Xiaoxiang Wen
Well-defined Fe 3 O 4 @SiO 2 composite colloidal particles decorated with Ag nanoparticles were successfully synthesized through a simple chemical approach. These particles self-assembled into 1D chain-like photonic structures under the induction of magnetic field and diffract tunable structural colors. The hue and brightness of the structural colors are related to Ag nanoparticles deposited on the particles surface and its brightness increases with the increase of Ag concentration. This phenomenon could be the result of the superposition of photonic bandgap formed by photonic crystals and possible plasmonic property, as well as capability in absorbing stray light of Ag nanoparticles. As-prepared Fe 3 O 4 @SiO 2 @Ag colloidal particles have great potential to be applied in many crucial areas such as color displaying, biological detection and anti-counterfeiting technology.
研究领域:
材料科学
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纳米技术
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Saudi Chemical Society
·
2016
·
IF 1.978
Bingzhen Li,Xiaodi Weng,Guojing Wu,Yang Zhang,Xuliang Lv,Guangxin Gu
Fe 3 O 4 /PPy/PANI (Fe 3 O 4 /polypyrrole/polyaniline) nanocomposites with excellent microwave absorbing properties have been successfully synthesized and characterized systematically. In detail, Fe 3 O 4 nanoparticles were prepared via an environmental friendly, modified co-precipitation method. Afterward, two conductive polymers, PPy and PANI, were deposited onto the surface of Fe 3 O 4 nanoparticles by in-situ polymerization of pyrrole and aniline. PPy and PANI was “glued” by the strong affinity between the carbonyl groups of PPy and the conjugated chains of PANI. The obtained Fe 3 O 4 /PPy/PANI nanocomposites have been found to possess excellent microwave absorbing property with the absorption bandwidth of 10.7 GHz (6.7–17.4 GHz) and maximum reflection loss at 10.1 GHz (−40.2 dB). It proves that the combination of ultra-small Fe 3 O 4 nanoparticles with two different conductive polymers have a great potential in the application of microwave absorbing materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2019
·
IF 4.865
Juan Tang,Jie Wang,Hui Jia,Haitao Wen,Juan Li,Wenbin Liu,Jingyu Li
For the low-concentration oily micro-polluted water formed by the leakage of refined oil products, an unexpensive and high-efficiency magnetic enhanced flocculation method was introduced in this study. First, the performance of magnetic flocculation(MF) to remove oily contaminants was discussed. The results indicated that it achieved more than 95% removal in only 1min with 50mg/L-Polyaluminum chloride(PAC), 50mg/L-Fe 3 O 4 and10mg/L- Polyacrylamide (PAM). The novel indexs R δ and S i were proposed to evaluate the oil removal with UV-Abs in-situ method. According to the adsorption kinetics of oil contaminants, the adsorption kinetics changed from pseudo-first-order to pseudo-second-order kinetics after the addition of Fe 3 O 4 on the basis of conventional coagulation (CF). It was transformed into intraparticle diffusion kinetics when the PAM continued to be added. Combined with the Fe–O–Al bond in the FTIR spectrum of flocs, the main mechanism of MF is enhanced charge neutralization and hydrogen bond adsorption. In addition, it was shown that satisfactory oil removal after recover, which indicated the great potential of a sustainable way by reusing low-cost magnetic seeds.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Zhi Zhu,Xu Tang,Wenqian Fan,Zhi Liu,Pengwei Huo,Tianshuai Wang,Yongsheng Yan,Chunxiang Li
A new Co-doped and Fe 3 O 4 quantum dots (QDs) decorated g-C 3 N 4 (CN) photocatalyst applied in the tetracycline degradation under visible light irradiation, is designed and synthesized. The Fe 3 O 4 -QDs@Co CN enhanced photocatalytic activity and cycling ability in comparison with individual CN significantly. It revealed a synergistic effect between the formation of Fe 3 O 4 -QDs and Co-doping. Results of characterization insight into the reason that Co-doped can regulate the band gap of CN, which has been proved by XPS and density functional theory (DFT). Moreover, the oxidation-reduction centre of Fe 3 O 4 -QDs with quantum effect can significantly boost the absorption of visible light and utilization electrons. Therefore, this work provides a broadening window for photo harvesting, charge using and separation during photocatalytic reactions.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2014
·
IF 2.538
Shaonan Lv,Yubei Song,Yaya Song,Zhigang Zhao,Changjing Cheng
Herein, we report a facile method to prepare beta-cyclodextrin (β-CD)-conjugated magnetic Fe 3 O 4 colloidal nanocrystal clusters (Fe 3 O 4 @GLY-CD) using (3-glycidyloxypropyl) trimethoxysilane (GLY) as the intermediate linker. The resulting Fe 3 O 4 @GLY-CD was characterized by several methods including Fourier transform infrared (FT-IR) spectroscopy, field-emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and vibrating sample magnetometer (VSM). In addition, the loading and release properties of the synthesized Fe 3 O 4 @GLY-CD for the hydrophobic molecule 8-anilino-1-naphthalenesulfonic acid ammonium salt (ANS) were also investigated. The results show that the Fe 3 O 4 @GLY-CD has a spherical structure with an average diameter of 186 nm and high saturated magnetism of 51.2 emu/g. The grafting of β-CD onto Fe 3 O 4 colloidal nanocrystal clusters can markedly increase the loading capacity of ANS because of β-CD/ANS inclusion complex formation. The in vitro delivery profile shows that the release of ANS from the Fe 3 O 4 @GLY-CD nanosystem exhibits an initial burst followed by a slow and steady release. Moreover, Fe 3 O 4 @GLY-CD also demonstrates a temperature-dependent release behavior for ANS owing to the effect of temperature on the association constants of β-CD/ANS inclusion complexes. The developed magnetic hybrid nanomaterial is expected to find potential applications in several fields including separation science and biomedicine.
研究领域:
材料科学
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生物医学工程
·
药物递送
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）