Hierarchical Fe3O4/Fe@C@MoS2 core-shell nanofibers for efficient microwave absorption

Tong, Zhouyu; Liao, Zijian; Liu, Yanyan; Ma, Mingliang; Bi, Yingpu; Huang, Weibo; Ma, Yong; Qiao, Mingtao; Wu, Guanglei

doi:10.1016/j.carbon.2021.04.051

Cited by 226 publications

(60 citation statements)

References 65 publications

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Section: ■ Results and Discussionmentioning

confidence: 99%

“…According to the electromagnetic parameters of the 3D flower-like 1T/2H-MoS 2 nanostructures, the values of RL can be calculated by the following formulas based on the transmission line theory , where Z in and Z 0 represent the incident impedance value of the absorber and the impedance of the free space, respectively, and d , f , and c are defined as the thickness of the absorber, the frequency of the electromagnetic wave in the free space and the velocity of light, respectively. Figures and S5 illustrate the electromagnetic wave absorption performance of the 3D flower-like 1T/2H-MoS 2 nanostructures with different filler loading ratios.…”

Section: Resultsmentioning

confidence: 99%

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MoS₂ Nanostructures with the 1T Phase for Electromagnetic Wave Absorption

Zheng

Liang

et al. 2021

ACS Appl. Nano Mater.

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Electromagnetic wave absorbers have high research values and application prospects in civil equipment and military informatization fields. As a typical 2D material, MoS 2 has grabbed considerable attention for electromagnetic wave absorption due to its large specific surface area, outstanding physical and chemical characteristics, and excellent electronic transmission properties. In particular, 1T-MoS 2 has higher electric conductivity and outstanding dielectric loss characteristics, which has promising potential for enhancing electromagnetic wave absorption performance. In this article, the 3D flower-like MoS 2 nanostructures with high contents of the 1T phase were triumphantly synthesized by the one-step hydrothermal method. The results show that the effective frequency bandwidth of reflection loss (RL) ≤ −10 dB of the 1T/2H-MoS 2 nanostructures with a filler loading ratio of 60 wt % is 5.36 GHz with a matching thickness of 2.04 mm. The maximum RL value of −63.78 dB at 11.12 GHz is achieved with a matching thickness of 2.57 mm. This is a better way to develop high-performance electromagnetic wave absorbers with 1T/2H-MoS 2 2D materials.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

MoS₂ Nanostructures with the 1T Phase for Electromagnetic Wave Absorption

Zheng

Liang

et al. 2021

ACS Appl. Nano Mater.

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“…Thereinto, water pollution cannot be ignored. [1][2][3][4][5] This is because of the high toxicity of heavy metal ions in the water and their continuously nondegradable accumulation in organisms. 6 Hence, the pollutants in wastewater must be removed before entering the natural environment.…”

Section: Introductionmentioning

confidence: 99%

“…The rapid industrialization development has caused serious harm to the environment. Thereinto, water pollution cannot be ignored 1–5 . This is because of the high toxicity of heavy metal ions in the water and their continuously nondegradable accumulation in organisms 6 .…”

Section: Introductionmentioning

confidence: 99%

Magnetic Fe₃O₄/polypyrrole‐salicylaldehyde composite for efficient removal of Mn (VII) from aqueous solution by double‐layer adsorption

Wang

Ren

Wang

et al. 2022

J of Applied Polymer Sci

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Fe3O4 acted as the inner core, conducting polymer polypyrrole (PPy) was wrapped on the surface of Fe3O4, and salicylaldehyde (SA) was grafted to prepare the Fe3O4/PPy‐SA composite. Fe3O4/PPy‐SA exhibited double adsorption properties for Manganese (Mn) (VII) from aqueous solution. And the adsorption properties were systematically investigated. The influences of pH, initial metal ion concentration and temperature on the adsorption performance were measured, showing that the optimal adsorption pH is 2. Moreover, it was found that the adsorption kinetics followed the pseudo second order model, the initial adsorption rate was 46.1467 mg/g/min, and the process was controlled by the liquid film diffusion. The Langmuir adsorption isotherm model could describe the adsorption process well, and the increase of metal ion concentration and temperature was beneficial to the adsorption process. At 288.15 K, the maximum equilibrium adsorption capacity was 471.6981 mg/g. Thermodynamic parameters indicated that the adsorption process was spontaneous, endothermic, and entropy increment. Meanwhile, the cycle test results showed that the adsorbent has good cycle performance and broad application prospects.

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“…[3,7] Current studies have confirmed that the effective EM attenuations via EMW absorbers mainly depend on the conductance loss, [8,9] dielectric loss, [10][11][12] magnetic loss [10,13,14] as well as their synergistic effects. [15,16] Constructing unique capacitor-like structure, [17] porous structure, [18] heterostructure, [19,20] or conductive network, [21,22] and introducing appropriate defects [23][24][25] and functional groups [26] into the absorbing matrix are the mainstream design ideas for achieving high-efficiency EMW absorbers with a wide frequency band and strong absorption. [27] Appropriate conductivity is a prerequisite for multiple forms of EM loss functions.…”

mentioning

confidence: 99%

Emerging Materials and Designs for Low‐ and Multi‐Band Electromagnetic Wave Absorbers: The Search for Dielectric and Magnetic Synergy?

Cheng

Zhang

Ning

et al. 2022

Adv Funct Materials

249

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Vigorous development of 5G communication technologies can boost mobile networks yet bring in electromagnetic interferences and safety concerns in utilizing electronic devices. Particularly, 5G network can not only involve a low‐frequency band of n78 (3.3–3.8 GHz) but also cover multi‐frequency bands of n77 (3.3–4.2 GHz) and n79 (4.4–5.0 GHz), displaying multiple electromagnetic radiations. Countless efforts have been devoted to investigating electromagnetic wave (EMW) absorbers with low‐ and multi‐band absorption properties. However, in terms of emerging materials and designs, few reports propose the mechanisms related to those properties. This perspective briefly reviews the impressive achievements of low‐ and multi‐frequency EMW absorbers and analyzes the design strategies that may enable low‐ and multi‐frequency absorption. Furthermore, the cutting‐edge mechanisms of corresponding electromagnetic responses, such as Snoek limit, quarter wavelength, and dielectric‐magnetic synergy effects are elaborated. Thus, this perspective can shed light on the new trends and ongoing challenges for EMW absorbers and further promote their practical application.

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Hierarchical Fe3O4/Fe@C@MoS2 core-shell nanofibers for efficient microwave absorption

Cited by 226 publications

References 65 publications

MoS₂ Nanostructures with the 1T Phase for Electromagnetic Wave Absorption

MoS₂ Nanostructures with the 1T Phase for Electromagnetic Wave Absorption

Magnetic Fe₃O₄/polypyrrole‐salicylaldehyde composite for efficient removal of Mn (VII) from aqueous solution by double‐layer adsorption

Emerging Materials and Designs for Low‐ and Multi‐Band Electromagnetic Wave Absorbers: The Search for Dielectric and Magnetic Synergy?

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Hierarchical Fe3O4/Fe@C@MoS2 core-shell nanofibers for efficient microwave absorption

Cited by 226 publications

References 65 publications

MoS2 Nanostructures with the 1T Phase for Electromagnetic Wave Absorption

MoS2 Nanostructures with the 1T Phase for Electromagnetic Wave Absorption

Magnetic Fe3O4/polypyrrole‐salicylaldehyde composite for efficient removal of Mn (VII) from aqueous solution by double‐layer adsorption

Emerging Materials and Designs for Low‐ and Multi‐Band Electromagnetic Wave Absorbers: The Search for Dielectric and Magnetic Synergy?

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Product

Resources

About

MoS₂ Nanostructures with the 1T Phase for Electromagnetic Wave Absorption

MoS₂ Nanostructures with the 1T Phase for Electromagnetic Wave Absorption

Magnetic Fe₃O₄/polypyrrole‐salicylaldehyde composite for efficient removal of Mn (VII) from aqueous solution by double‐layer adsorption