PVP-encapsulated CoFe2O4/rGO composites with controllable electromagnetic wave absorption performance

Zhu, Tao; Chang, Shucheng; Song, Yu‐Fei; Lahoubi, Mahieddine

doi:10.1016/j.cej.2019.05.079

Cited by 188 publications

(52 citation statements)

References 61 publications

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“…Table 1 summarizes the electromagnetic wave absorption performances between (ZCFO/MNFO)@C-MWCNTs and related hybrids reported in other literature [65,66,67,68,69,70,71,72,73,74,75]. It is clear that the electromagnetic absorption band of most hybrids are located in the relatively high frequency range.…”

Section: Resultsmentioning

confidence: 96%

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

Yin

Zhang

et al. 2019

Nanomaterials

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In this study, the quaternary hybrid of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs with high-performance in low frequency electromagnetic absorption was synthesized via a facile two-step solvothermal synthesis method. The physicochemical properties as well as electromagnetic parameters and microwave absorption performance were characterized by XRD, SEM, TEM, RS, TGA, and VNA, respectively. The results indicate a nuclear-shell morphology of this hybrid for amorphous carbon coated on the surface of Zn0.5Co0.5Fe2O4 and Mn0.5Ni0.5Fe2O4 mixed polycrystalline ferrites. In addition, the MWCNTs synchronously enwind in the nuclear-shell NPs to form a special cross-linking structure. The outstanding low frequency microwave absorption property is attributed to the synergistic effect of dielectric and magnetic loss, better impedance matching condition, and excellent attenuation characteristics of the as-prepared paramagnetic quaternary hybrid. Maximum RL of −35.14 dB at 0.56 GHz with an effective absorption bandwidth in the range of 0.27–1.01 GHz can be obtained with thickness of 5 mm. This hybrid exhibits superior low frequency microwave absorption properties compared with other ferrite-carbon nanocomposites. This investigation provides a new route to prepare suitable candidates for the absorption of electromagnetic waves in a low frequency band on account of its good performance and simple preparation process.

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Section: Resultsmentioning

confidence: 96%

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

Yin

Zhang

et al. 2019

Nanomaterials

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“…It can be observed that the ϵ′′ values of L‐900 and L‐1000 are higher than ϵ′ values almost in the entire range of 2–18 GHz. The ϵ′′ values are closely related to the conductivity, as shown in the following equation: [41]

true ϵ^{''} \approx σ (T) / 2 π ϵ_{0} f

…”

Section: Resultsmentioning

confidence: 99%

Hierarchically Porous Carbon/α‐Fe@Fe₃C Absorbers Derived from Luffa Sponge with Efficient Microwave Absorption

Zheng

Wang

et al. 2020

ChemistrySelect

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Biomass‐based carbon materials have attracted much attention in the field of microwave absorption because of their light weight, environmental friendliness, low cost and high efficiency. In this work, carbon matrix of porous microtubule structure with different magnetic particles was synthesized from natural luffa sponge by a simple calcination process. The carbon matrix possesses hierarchical porous structures including micrometer‐scale tubular channels, nanometer‐scale macrospores, mesopores and micropores, of which microspores are the most. The Fe3O4, FeO/α‐Fe, α‐Fe/γ‐Fe and α‐Fe/Fe3C particles were formed in the temperature range of 700–1000 °C. The porous carbon/α‐Fe@Fe3C composites obtained at 1000 °C exhibit excellent microwave absorption (MA) performance, its minimum reflection loss can reach −48.9 dB with only a thickness of 1.5 mm, and the effective absorption bandwidth (RL≤−10 dB) is 3.86 GHz. The porous structure, synergies between dielectric loss and magnetic loss, high attenuation constant are the key factors for good MA performance.

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“…The FT-IR spectrum of GO and rGO are given in Figure 1C in the range of 500–4,000 cm −1 . For pure GO, the broad peak located at about 3,350 cm −1 corresponds to O-H stretching vibrations of hydroxyl groups and HOH hydrogen-bonded owing to residual water (Pan et al, 2017 ; Zhu et al, 2019 ). The characteristic peak presenting at 1,715 and 1,614 cm −1 represent the C = O stretching vibration of carbonyl groups and the C = C skeletal stretching vibration of aromatic carbon.…”

Section: Resultsmentioning

confidence: 99%

“…However, traditional magnetic metal absorbing materials (Fe, Co, Ni) with a high complex permeability make it difficult to satisfy the impedance match in materials and free space (Xu et al, 2018a ). Unlike common magnetic metals, ferrites with a relatively high Snoek's limit, medium-built saturation magnetization, and coercivity have become a popular new EM wave absorbing material (Rusly et al, 2018 ; Trana et al, 2019 ; Zhu et al, 2019 ). For example, Lee et al Prepared M-type hexaferrites BaFe 12−x Co x O 19 (x = 0–2), which were synthesized by a co-precipitation technique, in which relatively high reflection loss (RL) values with the frequency range of 0.1–15 GHz was obtained (Trana et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Bi2Fe4O9 Nanocubes Loaded on Reduced Graphene Oxide for Enhanced Electromagnetic Absorbing Properties

et al. 2020

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Bi 2 Fe 4 O 9 (BFO) nanocubes were prepared in proportion using a simple and easy hydrothermal method, and were then assembled on reduced graphene oxide (rGO) multilayered sheets. The excellent microwave absorption properties of Bi 2 Fe 4 O 9 /rGO nanohybrids were achieved by properly adjusting the impedance matching and getting a high attenuation capability contributed from different ratios of the BFO and rGO. A minimum reflection loss value of −61.5 dB at 12.8 GHz was obtained with a Bi 2 Fe 4 O 9 /rGO ratio of 2:1, and the broadest bandwidth below −10 dB was up to 5.0 GHz (from 10.8 to 15.8 GHz) with a thickness of 2.4 mm. Additionally, the elementary mechanism of wave absorption performance is also investigated. Keywords: Bi 2 Fe 4 O 9 (BFO) nanocubes, Bi 2 Fe 4 O 9 /rGO nanohybrids, wave absorption property, a potential EMW material, hydrothermal method, a rather wide frequency band, synergy effect

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PVP-encapsulated CoFe2O4/rGO composites with controllable electromagnetic wave absorption performance

Cited by 188 publications

References 61 publications

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

Hierarchically Porous Carbon/α‐Fe@Fe₃C Absorbers Derived from Luffa Sponge with Efficient Microwave Absorption

Three-Dimensional Bi2Fe4O9 Nanocubes Loaded on Reduced Graphene Oxide for Enhanced Electromagnetic Absorbing Properties

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PVP-encapsulated CoFe2O4/rGO composites with controllable electromagnetic wave absorption performance

Cited by 188 publications

References 61 publications

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

Hierarchically Porous Carbon/α‐Fe@Fe3C Absorbers Derived from Luffa Sponge with Efficient Microwave Absorption

Three-Dimensional Bi2Fe4O9 Nanocubes Loaded on Reduced Graphene Oxide for Enhanced Electromagnetic Absorbing Properties

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Hierarchically Porous Carbon/α‐Fe@Fe₃C Absorbers Derived from Luffa Sponge with Efficient Microwave Absorption