Preparation and characterization of structure-tailored magnetic fluorescent Fe3O4/P(GMA–EGDMA–NVCz) core–shell microspheres

Ma, Mingliang; Zhang, Qiuyu; Xin, Tiejun; Zhang, Hepeng; Geng, Wangchang; Jian, Zhou

doi:10.1007/s10853-013-7322-9

Cited by 9 publications

(6 citation statements)

References 42 publications

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“…Core-shell Fe 3 O 4 @P(EGDMA-MAA) nanochains were synthesized through magnetic-field-induced precipitation polymerization [26,27]. Essentially, porous Fe 3 O 4 magnetic microspheres were first prepared using a modified hydrothermal method.…”

Section: Synthesis Of Core-shell Fe 3 O 4 @P(egdma-maa) Nanochainsmentioning

confidence: 99%

Application of yolk–shell Fe3O4@N-doped carbon nanochains as highly effective microwave-absorption material

et al. 2018

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Yolk-shell Fe 3 O 4 @N-doped carbon nanochains, intended for application as a novel microwave-absorption material, have been constructed by a three-step method. Magnetic-field-induced distillation-precipitation polymerization was used to synthesize nanochains with a one-dimensional (1D) structure. Then, a polypyrrole shell was uniformly applied to the surface of the nanochains through oxidant-directed vapor-phase polymerization, and finally the pyrolysis process was completed. The obtained products were characterized by X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), and thermogravimetric analyses (TGA) to confirm the compositions. The morphology and microstructure were observed using an optical microscope, scanning electron microscope (SEM), and transmission electron microscope (TEM). The N 2 absorption-desorption isotherms indicate a Brunauer-Emmett-Teller (BET) specific surface area of 74 m 2 /g and a pore width of 5-30 nm. Investigations of the microwave absorption performance indicate that paraffin-based composites loaded with 20 wt.% yolk-shell Fe 3 O 4 @N-doped carbon nanochains possess a minimum reflection loss of −63.09 dB (11.91 GHz) and an effective absorption bandwidth of 5.34 GHz at a matching layer thickness of 3.1 mm. In addition, by tailoring the layer thicknesses, the effective absorption frequency bands can be made to cover most of the C, X, and Ku bands. By offering the advantages of stronger absorption, broad absorption bandwidth, low loading, thin layers, and intrinsic light weight, yolk-shell Fe 3 O 4 @N-doped carbon nanochains will be excellent candidates for practical application to microwave absorption. An analysis of the microwave absorption mechanism reveals that the excellent microwave absorption performance can be explained by the quarter-wavelength cancellation theory, good impedance matching, intense conductive loss, multiple reflections and scatterings, dielectric loss, magnetic loss, and microwave plasma loss.

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Section: Synthesis Of Core-shell Fe 3 O 4 @P(egdma-maa) Nanochainsmentioning

confidence: 99%

Application of yolk–shell Fe3O4@N-doped carbon nanochains as highly effective microwave-absorption material

et al. 2018

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“…In this way, XRD was performed on OA-coated Fe 3 O 4 and MPEG, and the results are listed in panel 1 of Figure . As seen here, there were six characteristic diffraction peaks (2θ = 30.18°, 35.46°, 43.26°, 53.84°, 57.23°, and 62.77°) observed on both samples, which corresponded to the reflections of (220), (311), (400), (422), (511), and (440) of Fe 3 O 4 . Coating polymer on Fe 3 O 4 reduced further the XRD peak intensity, which indicated the fact that the crystalline nature of Fe 3 O 4 nanoparticles was partly shielded by the coated polymer.…”

Section: Resultsmentioning

confidence: 52%

Diethylaminoethyl-Modified Magnetic Starlike Organic Spherical Adsorbent: Fabrication, Characterization, and Potential for Protein Adsorption

Qiao

Zhao

et al. 2019

Ind. Eng. Chem. Res.

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This work reports the synthesis of a magnetic weak anionic spherical adsorbent with large size and starlike structure by magnetic induced self-assembly of organic latexes followed by modification with diethylaminoethyl hydrochloride (DEAE-HCl). The prepared adsorbent features unique starlike long chains stacked by anisotropic latexes (1 μm), large particle size (250 μm), and magnetic response. According to N 2 adsorption−desorption analysis, the starlike adsorbent possesses both specific surface area of 55.2 m 2 g −1 and total mesopore volume of about 2.7 cm 3 g −1 . After being modified with DEAE, the weak anionic adsorbent is evaluated for its adsorption performance. The analysis proves that the adsorbent approaches not only high static adsorption capacity of 113.05 mg mL −1 for BSA adsorption but also fast adsorption rate for approaching the adsorption equilibrium within less than 40 min. Additionally, the large particle size and magnetic response of the adsorbent facilitate the easy recovery of adsorbent from aqueous solution by simple filtration and/or external magnetic force. Hence, the prepared magnetic starlike spherical adsorbent is expected to have potential application in highperformance and large-scale purification of proteins.

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“…The preparation of Fe 3 O 4 /P (GMA‐EGDMA) microspheres prepared by distillation precipitation polymerization method has been detailed in our previous research . Then the Fe 3 O 4 /P (GMA‐EGDMA) microspheres (0.15 g) were dispersed in 100 ml of ethanol, and the hexamethylene diamine (6.0 g) was added and the reaction was stirred at 70 °C for 7 hr.…”

Section: Methodsmentioning

confidence: 99%

Synthesis, characterization and catalytic performance of core‐shell structure magnetic Fe₃O₄/P(GMA‐EGDMA)‐NH₂/HPG‐COOH‐Pd catalyst

Yang

Liao

et al. 2018

Applied Organom Chemis

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A strategy has been developed for the synthesis, characterization and catalysis of magnetic Fe3O4/P(GMA‐EGDMA)‐NH2/HPG‐COOH‐Pd core‐shell structure supported catalyst. The P(GMA‐EGDMA) polymer layer was coated on the surface of hollow magnetic Fe3O4 microspheres through the effect of KH570. The core‐shell magnetic Fe3O4/P(GMA‐EGDMA) modified by ‐NH2 could be grafted with HPG. Then, the hyperbranched glycidyl (HPG) with terminal ‐OH were modified by ‐COOH and adsorbed Pd nanoparticles. The hyperbranched polymer layer not only protected the Fe3O4 magnetic core from acid–base substrate corrosion, but also provided a number of functional groups as binding sites for Pd nanoparticles. The prepared catalyst was characterized by UV–vis, TEM, SEM, FTIR, TGA, ICP‐OES, BET, XRD, DLS and VSM. The catalytic tests showed that the magnetic Fe3O4/P(GMA‐EGDMA)‐NH2/HPG‐COOH‐Pd catalyst had excellent catalytic performance and retained 86% catalytic efficiency after 8 consecutive cycles.

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Preparation and characterization of structure-tailored magnetic fluorescent Fe3O4/P(GMA–EGDMA–NVCz) core–shell microspheres

Cited by 9 publications

References 42 publications

Application of yolk–shell Fe3O4@N-doped carbon nanochains as highly effective microwave-absorption material

Application of yolk–shell Fe3O4@N-doped carbon nanochains as highly effective microwave-absorption material

Diethylaminoethyl-Modified Magnetic Starlike Organic Spherical Adsorbent: Fabrication, Characterization, and Potential for Protein Adsorption

Synthesis, characterization and catalytic performance of core‐shell structure magnetic Fe₃O₄/P(GMA‐EGDMA)‐NH₂/HPG‐COOH‐Pd catalyst

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Preparation and characterization of structure-tailored magnetic fluorescent Fe3O4/P(GMA–EGDMA–NVCz) core–shell microspheres

Cited by 9 publications

References 42 publications

Application of yolk–shell Fe3O4@N-doped carbon nanochains as highly effective microwave-absorption material

Application of yolk–shell Fe3O4@N-doped carbon nanochains as highly effective microwave-absorption material

Diethylaminoethyl-Modified Magnetic Starlike Organic Spherical Adsorbent: Fabrication, Characterization, and Potential for Protein Adsorption

Synthesis, characterization and catalytic performance of core‐shell structure magnetic Fe3O4/P(GMA‐EGDMA)‐NH2/HPG‐COOH‐Pd catalyst

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Synthesis, characterization and catalytic performance of core‐shell structure magnetic Fe₃O₄/P(GMA‐EGDMA)‐NH₂/HPG‐COOH‐Pd catalyst