CHEMICAL PHYSICS LETTERS
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2020
·
IF 2.029
Ruihao Jin,Zhixuan Qiu,Wen Cheng,Xinglong Jin
Aniline is recalcitrant pollutant and its efficient and cost-effective removal is greatly needed. According to the existing methods in the laboratory, Fe 3 O 4 @SiO 2 @BiO 1.8 ·0.04H 2 O/Ag 3 PO 4 (FSBAP) magnetic nanocomposites were prepared and the photocatalytic properties were also evaluated with aniline as model pollutant. The experimental data suggested that the nanocomposites FSBAP could effectively degrade organic pollutants under visible light. The degradation rate of 250 mL aniline solution (10 mg/L) with 1.20 g/L FSBAP catalyst was 88.06% under visible light for 150 min. FSBAP nanocomposites showed good reusability and recyclability after five runs. In addition, scavengers trapping experiments proved that photogenerated holes (h + ) played an important role in photocatalytic reaction. The possible mechanism was also proposed. The results revealed that FSBAP exhibited high reusability and stability in degrading aniline.
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高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 37
·6610-6619
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IF 3.545
Qunling Fang,Kezhu Xu,Qingshan Xiong,Yunqi Xu,Ailing Hui,Shouhu Xuan
Infectious diseases associated with drug-resistant bacteria increasingly threaten public health. Effective antibacterial nanoplatforms are of special importance for treating bacterial infections. In this work, a novel magnetic Fe3O4–Au–PDA hybrid microcapsule with both photothermal (PTT) and photodynamic (PDT) anti-bacterial functions was developed. First, the Fe3O4@Au/PDA core/shell microspheres with hollow nature were obtained by a simple in situ redox–oxidize polymerization method. Then, they were etched in acid to improve the hollow interior and porous shell. Finally, the tetracarboxyzinc phthalocyanine (ZnPc) was used as the photosensitizer to be loaded into the above Fe3O4–Au–PDA hybrid microcapsule. Owing to the dual-mode photothermal Au–PDA hybrid shell and the ZnPc photosensitizer, the final Fe3O4–Au–PDA/ZnPc hybrid microcapsule serves as a wonderful photothermal/photodynamic (PTT/PDT) synergistic therapy agent. The experimental results show that the Fe3O4–Au–PDA/ZnPc microcapsule possesses excellent photothermal sterilization effect (808 nm laser irradiation) against Escherichia coli, and the experimental results further demonstrate good photodynamic behavior under Xenon lamp irradiation. The product exhibits much higher antibacterial performance by combining the PTT/PDT treatment, which demonstrates that this work provides a novel dual-mode phototheranostic nano-agent for an effective treatment of bacterial infections.
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高影响因子
APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Jiana Hu,Caiyun Liang,Jiadong Li,Yongjiu Liang,Shangyu Li,Guijie Li,Zhijiang Wang,Dewen Dong
Reduced graphene oxide@Fe 3 O 4 (rGO@Fe 3 O 4 ) nanocomposites were developed via a facile thermal decomposition method, which were subsequently incorporated into silicone rubber (SR) matrix to fabricate flexible rGO@Fe 3 O 4 /SR composites through mold pressing, followed by curing. The in situ grown Fe 3 O 4 nanoparticles on the rGO sheets endowed the rGO@Fe 3 O 4 /SR composites with magnetic properties and provided heterogeneous interface, which led to better impedance matching, enhanced magnetic loss and interfacial polarization loss. Under synergistic effect between dielectric loss and magnetic loss, the rGO@Fe 3 O 4 /SR composites exhibited high microwave absorption efficiency and wide absorption bandwidth. The minimum reflection loss value reached −59.4 dB at the frequency of 8.0 GHz, and the absorption bandwidth was 4.2 GHz at a thin layer of 1.2 mm. The rGO@Fe 3 O 4 /SR composites also showed excellent thermal conduction ability, which enabled fast dissipation of the heat generated by absorbing the microwave energy. The features of strong absorption, broad absorption bandwidth, high flexibility, small thickness, and excellent heat dissipation make the rGO@Fe 3 O 4 /SR composites promising microwave absorption candidates for aerospace and flexible electronics.
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2021
·Vol. 139
·期 2
·51476
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IF 3.125
Yu Zeng,Neng Zhou,Chenhan Xiong,Zhiyong Huang,Guoping Du,Zhaoyang Fan,Nan Chen
Silicone rubber composites have attracted wide attention due to their excellent thermal stability and climate resistance. However, it is still a challenge to synthesize these composites with high tensile property without external stimulation. Meanwhile, incorporation of superparamagnetic iron oxide nanoparticles to fabricate magnetic nanocomposites have a broad application prospect. In the present work, aiming to improve the mechanical and magnetic properties of the silicone rubber composite, fumed silica and different content of oleic acid-modified Fe 3 O 4 nanoparticles are well dispersed in the silicone rubber matrix. The synthesized nanocomposites exhibit excellent thermal stability, superelasticity, superparamagnetic property, and sensitive magnetic response. In particular, a high elongation at break of 1931%, a low storage modulus of 0.56 MPa and a deflection of 27 mm under an applied magnetic field of 1.31 Oe are obtained in the silicone rubber nanocomposite. The present work provides a feasible way to prepare silicone rubber matrix nanocomposites with excellent mechanical and magnetic performance.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Xiang Luo,Haifeng Li,Dongdong Deng,Lu Zheng,Yubo Wu,Wenjun Luo,Meijie Zhang,Rongzhou Gong
Fe 3 O 4 , as a typical absorber, its electromagnetic wave (EMW) absorption properties are far from meeting the requirements of practical application due to its poor impedance matching. In this study, three kinds of novel heterogeneous structured composites, dendritic Fe 3 O 4 @(HCl doped PANI), Fe 3 O 4 @(p-TSA doped PANI) and Fe 3 O 4 @(dedoped PANI), were prepared via hydrothermal method combined with thermal reduction and in-situ polymerization, and their phase composition, microscopic morphologies, static magnetic properties , EMW absorption performance and absorption mechanisms were investigated. The results showed that the introduction of different medium doped and dedoped PANI greatly enhanced the EMW absorption performance of Fe 3 O 4 . The outstanding advantages of Fe 3 O 4 @(HCl doped PANI) were that the widest effective absorption bandwidth ( EAB ) up to 6.08 GHz in a relatively thin thickness of 2.1 mm. And the Fe 3 O 4 @(dedoped PANI) composite achieved strong absorption ability (− 53.08 dB@3.04 GHz) at low frequency in a relatively thin thickness (4.9 mm). The remarkable improvement of EMW absorption performance of dendritic Fe 3 O 4 @PANI composites could be attributed to the introduction of dissipation mechanisms, the optimization of impedance matching characteristics and the formation of appropriate conductive network microstructure. The dendritic Fe 3 O 4 @PANI composites are promising EMW absorption materials and have great practical application value.
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高影响因子
Catalysts
·
2019
·Vol. 9
·期 12
·1062
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IF 3.444
Yue Wang,Xiaoxiao Zhu,Dongqing Feng,Anthony K. Hodge,Liujiang Hu,Jinhong Lü,Jianfa Li
The Fenton-type oxidation catalyzed by iron minerals is a cost-efficient and environment-friendly technology for the degradation of organic pollutants in water, but their catalytic activity needs to be enhanced. In this work, a novel biochar-supported composite containing both iron sulfide and iron oxide was prepared, and used for catalytic degradation of the antibiotic ciprofloxacin through Fenton-type reactions. Dispersion of FeS/Fe3O4nanoparticles was observed with scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) and transmission electron microscopy (TEM). Formation of ferrous sulfide (FeS) and magnetite (Fe3O4) in the composite was validated by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Ciprofloxacin (initial concentration = 20 mg/L) was completely degraded within 45 min in the system catalyzed by this biochar-supported magnetic composite at a dosage of 1.0 g/L. Hydroxyl radicals (·OH) were proved to be the major reactive species contributing to the degradation reaction. The biochar increased the production of ·OH, but decreased the consumption of H2O2, and helped transform Fe3+into Fe2+, according to the comparison studies using the unsupported FeS/Fe3O4as the catalyst. All the three biochars prepared by pyrolysis at different temperatures (400, 500 and 600 °C) were capable for enhancing the reactivity of the iron compound catalyst.Keywords:biochar;iron mineral;heterogeneous catalysts;antibiotic;advanced oxidation processes;water treatment;organic pollutants;Fenton reactions
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高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2019
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IF 3.507
Zhiyuan Feng,Yekun Zhu,Qin Zhou,Ying Wu,Tinghua Wu
In this work, a magnetic WO 3 /Fe 3 O 4 catalyst was synthesized by grinding-calcination method and applied in the deep oxidative desulfurization of dibenzothiophene (DBT). The results showed that the as-synthesized WO 3 /Fe 3 O 4 had high catalytic efficiency for sulfur-removal. The content of WO 3 , amount of the catalyst, TBHP/DBT molar ratio and reaction temperature had significant effects on the desulfurization efficiency. The highest DBT conversion of 92.3% was achieved on 35% WO 3 /Fe 3 O 4 catalyst with the O/S ratio of 12:1 at 100 °C for 4.5 h. The results of this study revealed that WO 3 /Fe 3 O 4 catalyst has excellent potential for desulfurization properties because of its high catalytic activity and easy separation ability under an external magnetic field.
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高影响因子
Journal of Superconductivity and Novel Magnetism
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2019
·Vol. 32
·期 9
·2903-2911
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IF 1.13
Sun Xiaoning,Wang Song,Wang Yaping,Sun Kangning
A simple one-step solvothermal method is proposed to prepare hydrophobic Fe 3 O 4 nanoparticles (MNPs) using iron acetylacetonate (Fe(acac) 3 ), oleylamine (OAm), and ethylene glycol (EG). X-ray powder diffraction, scanning electron microscope, infrared spectroscopy, transmission electron microscopy, X-ray photoelectron spectrometry, and vibrating sample magnetometer are used to characterize the structure, morphology, and properties of products. The testing results indicate that the as-synthesized products are spherical-like hydrophobic MNPs, superparamagnetic at room temperature, with a saturation magnetization up to 76.8 emu/g. The good hydrophobic property of MNPs is attributed to the coverage of oleylamine, without causing a remarkable loss of magnetic property. In addition, the influences of material ratio, aging time, oleic acid, and stearic acid used as additives are studied in our research.
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高影响因子
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
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2019
·Vol. 107
·期 7
·1532-1540
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IF 3.221
Mingchen Zhou,Fei Xie,Guocang Li,Qiyang Wang,Longxiang Tang,Manqing Yan,Hong Bi
The trinary hydroxyapatite@Fe 3 O 4 @N-doped carbon dots (HA@Fe 3 O 4 @N-CDs) hybrids were prepared by one-pot hydrothermal approach and utilized to detect and remove lead ion from aqueous solution. The structures and morphologies of as-obtained nanorod-like HA@Fe 3 O 4 @N-CDs hybrids were characterized by X-ray diffraction, scanning electron microscopy, and X-ray photoelectron spectroscopy measurements. These HA@Fe 3 O 4 @N-CDs hybrids possess good magnetism by magnetic hysteresis test and multi-colored fluorescence by the CLSM measurement. Furthermore, the as-obtained hybrids display excellent biocompatibility by MTT assay. Importantly, the trinary magnetic HA@Fe 3 O 4 @N-CDs hybrids as a green detector and adsorbent of Pb 2+ were investigated. The influence of the different pH, the concentration of heavy metal, and the maximum adsorption capacity on removal efficiency was measured in detail. The maximum Pb 2+ adsorption capacity on HA@Fe 3 O 4 @N-CDs hybrids is 450 mg/g. The kinetic mechanism was a pseudo-second order model, and the isotherm data was fitted well by the Langmuir isotherm and Freundlich model. Hence, the nanorod-like HA@Fe 3 O 4 @N-CDs hybrids could be a multifunctional material with significant potential applications in heavy metal detection and adsorption, bone tissue regeneration, magnetic therapy, and biomedicine. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A, 2019.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Xin Liu,Jihui Wang,Wenbin Hu
The nanocomposite corrosion inhibitor with MoO 4 2− intercalated ZnAl-LDH coating on the Fe 3 O 4 surface was synthesized by ion exchange methods. The morphology, structure and magnetic properties of the composite were characterized by transmission electron microscope, X-ray diffraction, Fourier transform infrared spectra and vibrating sample magnetometer . The release behavior of MoO 4 2− and corrosion inhibition of the sample under “NO MF” (without external magnetic field) and “MF ON” modes (under external magnetic field) were measured by UV–vis spectroscopy, electrochemical tests and scanning electron microscopy. Calcination the composite after release test and redispersing the sintered products in Na 2 MoO 4 solution, the composite was regenerated. The results show that the superparamagnetic nanocomposite inhibitor Fe 3 O 4 @MoO 4 -LDH presents well-defined core-shell structure. The release test revealed that for “NO MF” mode the release of MoO 4 2− from Fe 3 O 4 @MoO 4 -LDH displayed smaller t 0.5 (Time to reach half release equilibrium) of 4.25min and shorter time (3 h) to reach equilibrium with high release amount of 71.95% for 0.5 g/L nanocomposite. Under “MF ON” mode the release rate is slower with longer t 0.5 (from 26.40min to 1.60 h for 0.5 g/L to 4.0 g/L nanocomposite, respectively), thus realizing sustained release up to 12 h. At the same time, the release amount decreases and the release time prolongs with the concentration increasing. Correspondingly, the MoO 4 2− has a long-term excellent corrosion inhibition effect over 71.96% at 24 h on Q235 steel. For “NO MF”, the release route mainly contains the interlayer intraparticle diffusion between the LDH layers and interparticle diffusion among the outer LDH. While for “MF ON” mode, the diffusion between magnetic particles of corrosion inhibitor becomes important. The reconstructed inhibitor still maintains excellent superparamagnetic properties and high corrosion inhibition efficiency, up to 64.84% after five cycles.
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2019
·Vol. 34
·期 3
·752-759
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IF 0.605
Tang Qiuhan,Zhao Rui,Lu Qi,Qing Guangyan
A novel phosphoprotein separation material was developed, which is constructed by a magnetic mesoporous Fe 3 O 4 @TiO 2 (Fe 3 O 4 @mTiO 2 ) microsphere and a 5-aminoisophthalic acid (AIPA) monolayer that provides additional binding sites toward phosphate groups. The results of characteristic experiments demonstrated that Fe 3 O 4 @mTiO 2 -AIPA had good dispersability, high magnetic susceptibility, and satisfactory grafting ratio of AIPA, ascribed to the large specific surface area of the inorganic substrate. Taking advantages of these features, Fe 3 O 4 @mTiO 2 -AIPA was successfully utilized to separate α -casein (a typical phosphoprotein) and bovine serum albumin (BSA, a typical non-phosphoprotein) from their mixtures (molar ratio = 1:2). Through adjusting pH and polarity of solutions, the BSA and α -casein were respectively enriched in washing fraction and elution fraction. This result displays the good potential of Fe 3 O 4 @mTiO 2 -AIPA for application in phosphoprotein enrichment.
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高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Na Luo,Zhengli Yang,Fenglin Tang,Dan Wang,Min Feng,Xiangjun Liao,Xiupei Yang
In recent years, carbon nanodots (CNDs)-based hybrid nanomaterials with enzyme-like properties have received considerable attention because of the simplicity of their preparation, storage, and separation, as well as cost-effectiveness compared with natural enzymes. Here, Fe3O4/CNDs hybrid nanoparticles (NPs) are prepared via a hydrothermal method, and they possess excellent peroxidase-like catalytic activity. During the synthesis, the formation and surface state of Fe3O4 NPs were extremely affected by solutions of CNDs, which served as solvents. Fe3O4/CNDs hybrid NPs with abundant hydroxyl and carboxyl groups exhibit better catalytic kinetics than natural horseradish peroxidase (HRP) to produce a rapid chromogenic reaction. Such characteristics from Fe3O4/CNDs hybrid NPs led us to develop a colorimetric method for rapid and selective determination of glutathione with the detection limit of 0.058 μM. Our approach offers a simple and novel method to prepare Fe3O4/CNDs hybrid NPs with modified CNDs, and their applications may be extended to biosensors, medical diagnostics, and environmental monitoring.
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