One pot synthesis of Fe3O4/MnO2core–shell structured nanocomposites and their application as microwave absorbers

Liu, Xianguo; Wu, Niandu; Cui, Caiyun; Bi, Nannan; Sun, Yuping

doi:10.1039/c4ra14753g

Cited by 52 publications

(21 citation statements)

References 33 publications

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] The amount of nanoparticles in the paraffin-bonded composite is usually in the 30%-60%. In order to prove the present system as a lightweight and thin microwave absorber, the amount of nanoparticles is established to be 25 wt%.…”

Section: Materials Characterizationsmentioning

confidence: 99%

Ultrasmall superparamagnetic Ni nanoparticles embedded in polyaniline as a lightweight and thin microwave absorber

Han

Xiao

et al. 2015

RSC Adv.

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In this work, we have reported the preparation and lightweight and thin microwave absorbent application of ultrasmall Ni nanoparticles embedded in polyaniline (PANI). Ni nanoparticles have the average diameter of 2.1 nm, and are in the form of single crystals and possess a single magnetic domain structure. The blocking temperature of the Ni@PANI nanocomposite is established to be 52 K. The Ni@PANI nanocomposite is in a superparamagnetic state at 300 K. The optimal reflection loss value of a paraffin-bonded composite with 25 wt% of Ni@PANI nanocomposite reaches À22.98 dB at 17.8 GHz for a thickness of 1.0 mm.Compared with the represented Ni-based nanocomposites, Ni@PANI nanocomposites possess favorable properties at lower density and thinner thickness, resulting from the combined effect of magnetic loss and dielectric loss by introducing ultrasmall superparamagnetic Ni nanoparticles into the PANI matrix.

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Section: Materials Characterizationsmentioning

confidence: 99%

Ultrasmall superparamagnetic Ni nanoparticles embedded in polyaniline as a lightweight and thin microwave absorber

Han

Xiao

et al. 2015

RSC Adv.

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“…But, in the era of nanoscience and technology, the miniaturization of MnO 2 and its subsequent protection of particle size is a simple strategy to enhance its stability and catalytic efficiency. In line of this, MnO 2 nanoparticles are stabilized with various solid supports . Fortunately, magnetic support is the most preferable material for the stabilization of MnO 2 nanoparticles under the consideration of magnetic recycling of catalysts.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Fe₃O₄/Carbon Dot Supported MnO₂ Nanoparticles for the Controlled Oxidation of Benzyl Alcohols

Prathibha¹,

Rangasamy²,

Sridhar³

et al. 2020

ChemistrySelect

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In recent past, magnetic catalyst has gained much attention because it can be easily separated from the reaction mixture. Herein we report a facile synthesis of magnetic carbon dot supported MnO 2 nanoparticles for the oxidative transformation of organic compounds. In the actual synthesis, initially Fe 3 O 4 nanoparticles were prepared by microwave assisted method and carbon dots were prepared instantaneously from glucose by simple incineration under closed condition. The synthesized carbon dots were coated over iron oxide nanoparticles via sonochemical deposition method. Further, magnetic carbon dot supported MnO 2 nanocomposite was synthesized by conventional homogeneous precipitation using potassium permanganate. The synthesized nanocomposite material was characterized using FT-IR, SEM, TEM, XRD and VSM techniques. The catalytic efficiency of the nanomaterial was successfully demonstrated for the oxidation of benzyl alcohols to benzaldehydes. The advantages of this method include, controlled oxidation of alcohols to aldehydes with broad substrate scope, the use of molecular oxygen as a green oxidant and beyond that a facile magnetic separation of the catalyst material. Moreover, the catalyst can be recycled for 5 times without much loss in its efficiency.

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“…Graphene has already obtained an enormous reputation because of its wide range of practical applications. Recently, graphene has been at the forefront in the field of materials research and is remarkable due to the fact of its high carrier mobility, high surface area, low density, and abundant defects [31][32][33][34][35][36]. Generally, graphene is called reduced graphite oxide (rGO).…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Sandwich-Like rGO/CuS/Polypyrrole Nanoarchitectures for Efficient Electromagnetic Absorption

et al. 2020

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Currently, electromagnetic pollution management has gained much attention due to the various harmful effects on wildlife and human beings. Electromagnetic absorbers can convert energy from electromagnetic waves into thermal energy. Previous reports have demonstrated that reduced graphene oxide (rGO) makes progress in the electromagnetic absorption (EA) field. But the high value of permittivity of rGO always mismatches the impedance which results in more electromagnetic wave reflection on the surface. In this work, sandwich-like rGO/CuS/polypyrrole (PPy) nanoarchitectures have been synthesized by a facile two-step method. The experimental result has shown that a paraffin composite containing 10 wt.% of rGO/CuS/PPy could achieve an enhanced EA performance both in bandwidth and intensity. The minimum reflection loss (RL) value of −49.11 dB can be reached. Furthermore, the effective bandwidth can cover 4.88 GHz. The result shows that the as-prepared rGO/CuS/PPy nanoarchitectures will be a promising EA material.

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One pot synthesis of Fe₃O₄/MnO₂core–shell structured nanocomposites and their application as microwave absorbers

Abstract: Fe3O4/MnO2 core–shell structured nanocomposites have been synthesized by a one-pot approach at ambient temperature and pressure.

Cited by 52 publications

References 33 publications

Ultrasmall superparamagnetic Ni nanoparticles embedded in polyaniline as a lightweight and thin microwave absorber

Ultrasmall superparamagnetic Ni nanoparticles embedded in polyaniline as a lightweight and thin microwave absorber

Synthesis and Characterization of Fe₃O₄/Carbon Dot Supported MnO₂ Nanoparticles for the Controlled Oxidation of Benzyl Alcohols

Facile Synthesis of Sandwich-Like rGO/CuS/Polypyrrole Nanoarchitectures for Efficient Electromagnetic Absorption

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One pot synthesis of Fe3O4/MnO2core–shell structured nanocomposites and their application as microwave absorbers

Abstract: Fe3O4/MnO2 core–shell structured nanocomposites have been synthesized by a one-pot approach at ambient temperature and pressure.

Cited by 52 publications

References 33 publications

Ultrasmall superparamagnetic Ni nanoparticles embedded in polyaniline as a lightweight and thin microwave absorber

Ultrasmall superparamagnetic Ni nanoparticles embedded in polyaniline as a lightweight and thin microwave absorber

Synthesis and Characterization of Fe3O4/Carbon Dot Supported MnO2 Nanoparticles for the Controlled Oxidation of Benzyl Alcohols

Facile Synthesis of Sandwich-Like rGO/CuS/Polypyrrole Nanoarchitectures for Efficient Electromagnetic Absorption

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Product

Resources

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One pot synthesis of Fe₃O₄/MnO₂core–shell structured nanocomposites and their application as microwave absorbers

Synthesis and Characterization of Fe₃O₄/Carbon Dot Supported MnO₂ Nanoparticles for the Controlled Oxidation of Benzyl Alcohols