Investigation on microwave absorption capacity of nanocomposites based on metal oxides and graphene

Bhattacharya, Pallab; Das, C. K.

doi:10.1007/s10854-012-1036-7

Cited by 10 publications

(4 citation statements)

References 37 publications

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“…The peaks appeared at 839 cm À1 , 1159 cm À1 , 1322 cm À1 , 1474 cm À1 and 1594 cm À1 , which represent the C-H out of plane bending vibration of a 1,4-disubstituted aromatic ring, C-H bending mode of a quinoid ring, C-N and C-N + stretching vibration mode or C-H bending mode of a benzenoid ring, C]N stretching mode of a benzenoid ring and the C]C stretching mode of a quinoid ring respectively. 18,24,34,35 Fig. 4b shows the FTIR spectrum of graphene/CFA/PANI which contains all the peaks that appeared for PANI.…”

Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 99%

“…16 The high surface area of graphene is useful for high energy storage at the electrode-electrolyte interface of a supercapacitor, and is also helpful for microwave absorption. 17,18 With this great advantage of using graphene, the very light weight of graphene and its sheet/plate like morphology is also very useful. M-type hexaferrite and PANI can also contribute to the microwave absorption and supercapacitor properties of a material in different fashions.…”

Section: Introductionmentioning

confidence: 99%

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Graphene decorated with hexagonal shaped M-type ferrite and polyaniline wrapper: a potential candidate for electromagnetic wave absorbing and energy storage device applications

et al. 2014

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The development of promising microwave absorbing materials is a booming field of research in both the commercial and defense sectors to prevent electromagnetic pollution, and also to enrich the field of stealth technology. Supercapacitors are a symbol of clean energy storage devices. The present work attends to the preparation of hexagonal shaped magnetic M-type hexaferrite, CuFe 10 Al 2 O 19 (CFA) by a facile chemical co-precipitation method, and the formation of its composites (graphene/CFA) in the presence of acid modified graphene. An in situ approach was employed for the coating of graphene with CFA. Another nanocomposite (graphene/CFA/PANI) was prepared by the wrapping of graphene/CFA with polyaniline (PANI), which was prepared through the in situ chemical oxidation polymerization of aniline.The prepared multifunctional nanocomposites showed an outstanding and improved microwave absorption property (the maximum reflection loss was À63.6 dB at a thickness of 2.5 mm with a broad absorption range) and electrochemical properties (the highest specific capacitance value was 342 F g À1 ), in contrast to the pristine graphene and CFA. The addition of PANI also improves the microwave absorption and specific capacitance of the nanocomposites. The formation of the multifunctional nanocomposites and their structural characteristics are discussed thoroughly with their impact on the two different fields of applications i.e. microwave absorbing and energy storage device applications individually.

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Section: Fourier Transform Infrared (Ftir) Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Graphene decorated with hexagonal shaped M-type ferrite and polyaniline wrapper: a potential candidate for electromagnetic wave absorbing and energy storage device applications

et al. 2014

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“…[1][2][3][4][5] Achieving improved absorption performance usually requires high dielectric loss, high magnetic loss, and optimized impedance matching in materials. Therefore, various kinds of materials have been investigated, including metal oxides, [6][7][8] ferromagnetic metals, 8,9 and multicomponent composites, 10,11 . More importantly, it has been proved that a porous structure greatly improves microwave absorption properties, not only by enhancing the interfacial polarization, but also by introducing a multiple-reflection-loss mechanism.…”

Section: Introductionmentioning

confidence: 99%

Porous Fe@Fe3O4-C Nanocomposite Using Polyvinyl Alcohol Sponge as Template for Microwave Absorption

Zhang

Jiang

et al. 2020

Journal of Elec Materi

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In order to obtain a material with excellent microwave absorption performance, polyvinyl alcohol (PVA) sponge was employed as the template. The porous structure of the sponge can facilitate faster and more uniform diffusion of the ferric nitrate liquid during the dipping and obtain a uniform distribution of the ferromagnetic particles, which serves as a functional phase to enhance the microwave absorption properties. The Fe@Fe 3 O 4-C nanocomposite can then be fabricated through a dipping/carbonization process. The special core-shell structure effectively improves the dielectric and magnetic loss and provides proper impedance matching. The results indicate that the prepared samples show excellent microwave absorption performance, with maximum effective absorption bandwidth up to 7.9 GHz at a thickness of 2.27 mm. The maximum reflection loss can reach À48.36 dB at 9.6 GHz. Therefore, it is feasible to use PVA sponge as a template to fabricate porous Fe@Fe 3 O 4-C nanocomposite with excellent microwave absorption performance.

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“…As one of its widely-known derivative, reduced graphene oxide (rGO) exhibits good dielectric properties and easily forming nanocomposites for potential applications in EM shielding and absorption either in form of nanostructured powders or films/papers [6][7][8]. rGO-based composites exhibited enhanced microwave absorption performance compared to the pure component.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Graphene-based Free-standing Composite Film for Electromagnetic Wave Absorption Applications

Yang

Wang

2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

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Abstract.Carbon-based lightweight, thin, and self-standing composite film/paper could be a promising material for electromagnetic shielding applications because of their high flexibility, good electromagnetic properties, and high electrical conductivity. In this paper, a new-type composite of reduced graphene oxide (rGO) and Fe 3 O 4 nanoparticles (F-NPs) has been investigated for potential applications in electromagnetic microwave absorbing film. The results indicated that with increasing the loading of F-NPs in the films, the values of saturation magnetization increased, contributing to an enhanced permeability of rGO/F-NPs composite films, while the dielectric loss decreased corresponding to a low conductivity. A maximum reflection loss of -11.04 dB was obtained at 5.19 GHz for the composite with 100 mg graphene oxide and 200 mg F-NPs with a matching thickness of 3.0 mm, and the effective absorption bandwidth with reflection loss values less than -10 dB covered 2.8-8.6 GHz.

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Investigation on microwave absorption capacity of nanocomposites based on metal oxides and graphene

Cited by 10 publications

References 37 publications

Graphene decorated with hexagonal shaped M-type ferrite and polyaniline wrapper: a potential candidate for electromagnetic wave absorbing and energy storage device applications

Graphene decorated with hexagonal shaped M-type ferrite and polyaniline wrapper: a potential candidate for electromagnetic wave absorbing and energy storage device applications

Porous Fe@Fe3O4-C Nanocomposite Using Polyvinyl Alcohol Sponge as Template for Microwave Absorption

Magnetic Graphene-based Free-standing Composite Film for Electromagnetic Wave Absorption Applications

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