Structural, morphological and optomagnetic properties of GO/Nd/Cu-Mn ferrite ternary nanocomposite

Kanna, R. Rajesh

doi:10.1016/j.ceramint.2019.05.132

Cited by 13 publications

(4 citation statements)

References 47 publications

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“…[20,56] Figure 5c demonstrates the high-resolution spectrum of N 1s can be fitted by three deconvolution peaks at 399.2, 399.9, and 400.6 eV, in association with pyridinic N bonding, pyrrolic N bonding, and graphitic N bonding, respectively. [53] Here, the pyridine N, deriving from the sp 2 -hybridized N atom in bond with two C atoms at the edge of graphene, donates a p-electron to the π-conjugation system, while the pyrrolic N, which offers two p-electrons to the π-conjugation system on account of the sp 3 -hybridized nitrogen atom in the five-membered heterocycle. [57] The graphitic N bonding is related to the sp 2 hybridized nitrogen bonded with three adjacent sp 2 hybridized C atoms bound to it, displacing the C atom in the graphene lattice.…”

Section: Synthesis and Structural Analysis Of Different Samplesmentioning

confidence: 99%

“…

benefits mankind, in the meantime, the resulting electromagnetic pollution can be harmful to human health and the high sensitivity of electronic equipment, which is considered the fourth greatest source of pollution. [1][2][3] In order to overcome the problems, highly efficient absorbing materials for microwave (EMW with higher frequency) have gradually emerged as a research hotspot. [4,5] In practical applications, the demand for microwave absorbers with thin thickness, high absorption capacity, lightweight, wide bandwidth, and good impedance matching is substantial.

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mentioning

confidence: 99%

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The Ordered Mesoporous Barium Ferrite Compounded with Nitrogen‐Doped Reduced Graphene Oxide for Microwave Absorption Materials

Zhao

Cao

et al. 2023

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Nanocomposites with hierarchical pore structure hold great potentials for applications in the field of microwave‐absorbing materials because of their lightweight and high‐efficiency absorption properties. Herein, M‐type barium ferrite (BaM) with ordered mesoporous structure (M‐BaM) is prepared via a sol–gel process enhanced by mixed anionic and cationic surfactants. The surface area of M‐BaM is enhanced almost ten times compared with BaM together with 40% reflection loss enhancing. Then M‐BaM compounded with nitrogen‐doped reduced graphene oxide (MBG) is synthesized via hydrothermal reaction in which the reduction and nitrogen doping of graphene oxide (GO) in situ occur simultaneously. Interestingly, the mesoporous structure is able to provide opportunity for reductant to enter the bulk M‐BaM reducing its Fe3+ to Fe2+ and further forms Fe3O4. It requires an optimal balance among the remained mesopores in MBG, formed Fe3O4, and CN in nitrogen‐doped graphene (N‐RGO) for optimizing impedance matching and greatly increasing multiple reflections/interfacial polarization. MBG‐2 (GO:M‐BaM = 1:10) achieves the minimum reflection loss of −62.6 dB with an effective bandwidth of 4.2 GHz at an ultra‐thin thickness of 1.4 mm. In addition, the marriage of mesoporous structure of M‐BaM and light mass of graphene reduces the density of MBG.

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Section: Synthesis and Structural Analysis Of Different Samplesmentioning

confidence: 99%

“…

…”

mentioning

confidence: 99%

The Ordered Mesoporous Barium Ferrite Compounded with Nitrogen‐Doped Reduced Graphene Oxide for Microwave Absorption Materials

Zhao

Cao

et al. 2023

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“…As a result of quantum size effects [37], the bandgap widening in V 2 O 5 thin films is even greater at low growth temperatures, where grain sizes are relatively small (≤50 nm). Moreover, the mean crystal dimension decreases, resulting in a smaller band gap due to quantum size effects [38]. A vacancy in the lattice of V 2 O 5 thin films creates lower absorption bands in the optical spectrum due to oxygen vacancies between two V-O layers.…”

Section: Uv-visible Analysismentioning

confidence: 99%

Structural, Optical and Electrical Properties of V2O5 Thin films at different Molarities by Spray pyrolysis method

Fathima

Punithavthy

et al. 2022

J. Nig. Soc. Phys. Sci.

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Nowadays, Semiconducting thin films are the efficient candidates for good optical and electrical properties. In this study, the thin films of pure V2O5 together with 2 different molarities were prepared through the method of spray Pyrolysis. The prepared thin films were characterized by spectrographic tools such as XRD, FT-IR, UV-Vis and Hall effect to study their, crystalline nature, Functional group, band gap, resistivity, conductivity and mobility of the flow of electrons respectively. The structural morphology of the synthesized thin films was discussed through the micrographic image obtained from Scanning electron microscopy together with their surface occupancy plots. The obtained minimum crystallite size is about 26.8 nm for 4% molarities. The morphological and structural studies show enhanced results for 4% sample which makes it a viable candidature for optical and electrical applications.

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“…Currently, scientific researchers have shifted their attention to developing ferrite composites materials at the nano-level. [11][12][13][14][15] Thus, nanocomposites are a novel material and their importance is increasing day by day due to their noticeable properties arising from the synergism of their base and added material. In addition, development of nanocomposites has no restriction on the mixture of materials, which leads to inventive and intensive research.…”

Section: Introductionmentioning

confidence: 99%

Structural, Morphological, and Optomagnetic Properties of La/Cu/Cu-Mn Ferrite Ternary Nanocomposites

Kanna¹,

Sakthipandi²

2019

Journal of Elec Materi

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CuFe 2 O 4 (CF), Cu 0.5 Mn 0.5 Fe 2 O 4 (CMF), and Cu 0.5 Mn 0.5 Fe 1.5 La 0.5 O 4 (LCMF) ferrite nanocomposites were synthesized by simple sonochemical reaction. The structural, optical, and magnetic properties of the prepared CF, CMF, and LCMF ferrite nanocomposites were analyzed through x-ray diffraction pattern, Fourier transform infrared spectra, ultraviolet spectra, x-ray photoelectron spectroscopy (XPS), scanning electron microscopy, and vibrating sample magnetometer loop. The crystal size of the LCMF ferrite ternary nanocomposite was less than that of the CF and CMF ferrite nanocomposites. XPS revealed the oxidation state (Cu 2p, Mn 2p, La 3d, Fe 2p, and O 1s) and the binding energy of the element present in the prepared CF, CMF, and LCMF ferrite ternary nanocomposites. The scanning electron microscopy images showed spherical morphology. The optical bandgap energy of LCMF was 5.33 eV higher than that of the CF (1.66 eV) and CMF (2.10 eV) ferrite nanocomposites. The coercivity of the prepared ferrite nanocomposites confirmed soft magnetic nature of the CF, CMF, and LCMF ferrite nanocomposites. By doping a small amount of La 3+ ions in CMF nanoferrite, it was found that the doped LCMF ferrite ternary nanocomposite has a high permeability, which enhances the useful magnetic properties of LCMF ferrite nanocomposite for electronic devices. The optical bandgap and high permeability of the LCMF ferrite ternary nanocomposite are more suitable for microwave absorption application.

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Structural, morphological and optomagnetic properties of GO/Nd/Cu-Mn ferrite ternary nanocomposite

Cited by 13 publications

References 47 publications

The Ordered Mesoporous Barium Ferrite Compounded with Nitrogen‐Doped Reduced Graphene Oxide for Microwave Absorption Materials

The Ordered Mesoporous Barium Ferrite Compounded with Nitrogen‐Doped Reduced Graphene Oxide for Microwave Absorption Materials

Structural, Optical and Electrical Properties of V2O5 Thin films at different Molarities by Spray pyrolysis method

Structural, Morphological, and Optomagnetic Properties of La/Cu/Cu-Mn Ferrite Ternary Nanocomposites

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