Dispersibility, Shape and Magnetic Properties of Nano-Fe&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;O&amp;lt;sub&amp;gt;4&amp;lt;/sub&amp;gt; Particles

Liang, Xiaojuan; Shi, Hu; Jia, Xiaoxu; Yang, Yunxia; Liu, Xiangnong

doi:10.4236/msa.2011.211219

Cited by 13 publications

(3 citation statements)

References 19 publications

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“…The values match the standard data [JCPDS card NO. 26‐1136] 26 however, a very weak peak at 21.15 0 in both the patterns corresponds to activated carbon and activated charcoal, respectively. This confirms the formation of Fe 3 O 4 /activated carbon and Fe 3 O 4 /activated charcoal composite 25,27,28 …”

Section: Resultsmentioning

confidence: 99%

Effect of carbon fiber reinforcement on the mechanical and electromagnetic shielding properties of the Fe₃O₄‐carbonaceous/epoxy composites

Anu¹,

Vishnumurthy²,

Mahesh³

et al. 2023

Polymers for Advanced Techs

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The present work aimed at the simultaneous improvement in the mechanical and electromagnetic shielding properties of Fe3O4‐carbonaceous/epoxy composites by the reinforcement of two plies of carbon fiber into the epoxy‐filler matrix. In this study, Fe3O4‐activated carbon and Fe3O4‐activated charcoal composites were synthesized by co‐precipitation method and were introduced into the epoxy matrix with different weight percentage (5, 10, and 15 wt%). The BET surface area analysis revealed the high porosity in the Fe3O4‐activated charcoal composite than that of activated carbon composite. The Fe3O4‐activated carbon/epoxy composite showed better mechanical properties than the later. Both the composites showed nearly same EMI SE value. 10 wt% of the filler‐1/epoxy composite showed the highest shielding effectiveness (SE) value of −22.5 dB at 10 GHz whereas 15 wt% Fe3O4@charcoal/epoxy composite showed better SE value of −27.15 dB at 8.8 GHz. The obtained results were supported by the dielectric and magnetic loss tangent studies. The incorporation of carbon fiber enhanced the mechanical property by three times and the EMI SE value by ~15 dB. Thus, the carbon fiber reinforced Fe3O4/carbonaceous epoxy composites may be the potential electromagnetic shielding material for electronics and aircraft industries.

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Section: Resultsmentioning

confidence: 99%

Effect of carbon fiber reinforcement on the mechanical and electromagnetic shielding properties of the Fe₃O₄‐carbonaceous/epoxy composites

Anu¹,

Vishnumurthy²,

Mahesh³

et al. 2023

Polymers for Advanced Techs

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“…Magnetic NPs (MNPs) are promising candidates, among others, for carrier-bound immobilisation of the enzymes, owing to their unique physical and chemical properties, such as low toxicity, biocompatibility, superparamagnetism, large surface-to-volume ratio, easy separation under external magnetic fields, and above all, their magnetic properties. MNPs with various surface modifications have been used as the carrier for enzyme immobilisation [10][11][12][13]. The construction of versatile core-shell MNPs has been recently established by physical or chemical modification of natural biopolymers on the surface of Fe 3 O 4 NPs for functionalising of the particles.…”

Section: Introductionmentioning

confidence: 99%

Magnetic soy protein isolate–bovine serum albumin nanoparticles preparation as a carrier for inulinase immobilisation

Mikani

Torabizadeh

Rahmanian

2018

IET nanobiotechnol.

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Magnetic nanoparticles (NPs) were functionalised with soy protein isolate (SPI) and bovine serum albumin (BSA) for inulinase immobilisation. The results revealed the nanomagnetite size of about 50 nm with a polydispersity index (PDI) of 0.242. The average size of the SPI NPs prepared by using acetone was 80-90 nm (PDI, 0.277), and SPI-BSA NPs was 80-90 nm (PDI, 0.233), and their zeta potential was around -34 mV. The mean diameter of fabricated FeO@SPI-BSA NPs was <120 nm (PDI, 0.187). Inulinase was covalently immobilised successfully through glutaraldehyde on FeO@SPI-BSA NPs with 80% enzyme loading. Fourier transform infrared spectra, field emission scanning electron microscopy, and transmission electron microscopy images provided sufficient proof for enzyme immobilisation on the NPs. The immobilised inulinase showed maximal activity at 45°C, which was 5°C higher than the optimum temperature of the free enzyme. Also, the optimum pH of the immobilised enzyme was shifted from 6 to 5.5. Thermal stability of the enzyme was considerably increased to about 43% at 75°C, and value was reduced to 25.4% after immobilisation. The half-life of the enzyme increased about 5.13-fold at 75°C as compared with the free form. Immobilised inulinase retained over 80% of its activity after ten cycles.

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“…The TEM images of as-synthesized SHSS are illustrated in Figure 3 orange red FeOOH phase [20]. (Figure 4(a)) [21].…”

Section: The Structure and Morphology Of Shssmentioning

confidence: 99%

A Simple and “Green” Method for Synthesis of Magnetic Hollow Silica Spheres and Its <sup>99</sup>Tc<sup>m</sup> Labeled Targeting Studies

Liu¹,

Li²,

Sloppy³

et al. 2017

OJIC

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The magnetic hollow silica spheres (MHSS) with uniform cavity size and shell thickness were prepared by a simple and "green" method using functionalized SiO 2 spheres as templates. Magnetic particles (Fe 3 O 4 ) were deposited on the SiO 2 surface by varying the molar ratio of [Fe 2+ ]/ [Fe 3+ ] and the molar concentration of iron salts. The obtained magnetic hollow silica spheres exhibited a super-paramagnetic behavior at room temperature. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray powder scattering (XRD) were applied to characterize the MHSS. Besides, their unit cell parameters are calculated according to results indexing to XRD, the MHSS sample prepared at 0.10 M iron salts and 2:1 molar ratio of [Fe 2+ ]/ [Fe 3+ ] has a largest cell angle (β) of unit cell. Due to large hollow cavity space and super-paramagnetic characteristics, the inner amino-functionalized MHSS could be labeled with radioisotope 99 Tc m to study the MHSS's magnetic targeting distribution in vivo. These results indicate that the MHSS has potential in the magnetic targeted drug delivery system which reduces the damage to normal cells and improves the therapeutic effect of cancer.

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Dispersibility, Shape and Magnetic Properties of Nano-Fe<sub>3</sub>O<sub>4</sub> Particles

Cited by 13 publications

References 19 publications

Effect of carbon fiber reinforcement on the mechanical and electromagnetic shielding properties of the Fe₃O₄‐carbonaceous/epoxy composites

Effect of carbon fiber reinforcement on the mechanical and electromagnetic shielding properties of the Fe₃O₄‐carbonaceous/epoxy composites

Magnetic soy protein isolate–bovine serum albumin nanoparticles preparation as a carrier for inulinase immobilisation

A Simple and “Green” Method for Synthesis of Magnetic Hollow Silica Spheres and Its <sup>99</sup>Tc<sup>m</sup> Labeled Targeting Studies

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Dispersibility, Shape and Magnetic Properties of Nano-Fe&lt;sub&gt;3&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt; Particles

Cited by 13 publications

References 19 publications

Effect of carbon fiber reinforcement on the mechanical and electromagnetic shielding properties of the Fe3O4‐carbonaceous/epoxy composites

Effect of carbon fiber reinforcement on the mechanical and electromagnetic shielding properties of the Fe3O4‐carbonaceous/epoxy composites

Magnetic soy protein isolate–bovine serum albumin nanoparticles preparation as a carrier for inulinase immobilisation

A Simple and “Green” Method for Synthesis of Magnetic Hollow Silica Spheres and Its &lt;sup&gt;99&lt;/sup&gt;Tc&lt;sup&gt;m&lt;/sup&gt; Labeled Targeting Studies

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Product

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Dispersibility, Shape and Magnetic Properties of Nano-Fe<sub>3</sub>O<sub>4</sub> Particles

Effect of carbon fiber reinforcement on the mechanical and electromagnetic shielding properties of the Fe₃O₄‐carbonaceous/epoxy composites

Effect of carbon fiber reinforcement on the mechanical and electromagnetic shielding properties of the Fe₃O₄‐carbonaceous/epoxy composites

A Simple and “Green” Method for Synthesis of Magnetic Hollow Silica Spheres and Its <sup>99</sup>Tc<sup>m</sup> Labeled Targeting Studies