Novel ZnFe2O4@MnO2@MXene composites with ultrathin thickness and excellent electromagnetic absorption performance

Peng, Junhao; Guo, Jin; Lv, Shixuan; Jiang, Xiang

doi:10.1016/j.coco.2022.101316

Cited by 21 publications

(10 citation statements)

References 51 publications

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“…The maximum value for Z N is 1 which exhibits the ideal impedance matching 18 . Z N is expressed as follows 19 :

Z_{normalN} = |\frac{Z_{in}}{Z_{0}}| = \sqrt{|\frac{μ_{normalr}}{ε_{normalr}}|} \tan h [j (\frac{2 italicπfd}{c}) \sqrt{μ_{normalr} ε_{normalr}}] .

…”

Section: Resultsmentioning

confidence: 99%

“…From Figure 7d, the normalized input impedance for S4 is above 0.5 between 9.5 and 12 GHz, exhibiting a higher impedance matching than other samples. 19 However, the increase of graphene and Fe 3 O 4 content from S4 to S5 enhances μ 0 and ε 0 and reduces ε 00 and μ 00 , which leads to impedance mismatch and higher external reflection. Hence, for a high impedance matching which leads to high absorption power, ε 00 , ε 0 , μ 00 , and μ 0 need to be held in an optimum balance through an appropriate content of graphene and Fe 3 O 4 , which can be called the optimum content.…”

Section: Microwave Absorption Propertiesmentioning

confidence: 99%

“…The maximum value for Z N is 1 which exhibits the ideal impedance matching. 18 Z N is expressed as follows 19 :…”

Section: Microwave Absorption Propertiesmentioning

confidence: 99%

“…This phenomenon can lead to conductance loss and absorption. 19,20 Second, the formed network between graphene and PANI can accelerate electron transfer, which significantly boosts internal reflection and wave dissipation by converting electromagnetic energy into thermal energy. 21 Third, the formed dipole at the interface between graphene and polymer matrix can react with the electromagnetic field to cause microwave loss in the form of heat energy through the lattice vibration.…”

Section: Microwave Absorption Propertiesmentioning

confidence: 99%

See 3 more Smart Citations

A study on microwave absorption properties of polyaniline/nitrile rubber/graphene/Fe₃O₄ composites with a thickness of 0.7 mm and high flexibility

Rezazadeh

Kianvash

Zhao

et al. 2023

J of Applied Polymer Sci

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The genotoxic effect of microwave radiation on humans is one of the leading causes of some diseases like cancer. Despite many reported materials for microwave absorption, there is still a demand for a super‐thin and flexible microwave absorber. In the present work, we synthesized Fe3O4/graphene/polyaniline/nitrile butadiene rubber composites with a thickness of 0.7 mm using a melt mixing method. Then, we comprehensively studied the electromagnetic and microwave absorption properties of the composites from 8 to 12 GHz. The composite with 38 wt% Fe3O4 and 6 wt% graphene exhibited the highest microwave absorption of more than 8 dB in the entire range of 8–12 GHz, with a minimum reflection loss of −14 dB at 10.3 GHz. By increasing the weight content of Fe3O4 and graphene, the imaginary part of dielectric permeability and magnetic permeability initially went up and then declined, resulting in poor impedance matching. Hence, we precisely controlled the weight content of the fillers to reach the highest impedance matching and attenuation constant. Consequently, this work opened up a unique way for developing super‐thin, lightweight, flexible microwave‐absorbing materials.

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“…The maximum value for Z N is 1 which exhibits the ideal impedance matching 18 . Z N is expressed as follows 19 :

Z_{normalN} = |\frac{Z_{in}}{Z_{0}}| = \sqrt{|\frac{μ_{normalr}}{ε_{normalr}}|} \tan h [j (\frac{2 italicπfd}{c}) \sqrt{μ_{normalr} ε_{normalr}}] .

…”

Section: Resultsmentioning

confidence: 99%

Section: Microwave Absorption Propertiesmentioning

confidence: 99%

“…The maximum value for Z N is 1 which exhibits the ideal impedance matching. 18 Z N is expressed as follows 19 :…”

Section: Microwave Absorption Propertiesmentioning

confidence: 99%

Section: Microwave Absorption Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

A study on microwave absorption properties of polyaniline/nitrile rubber/graphene/Fe₃O₄ composites with a thickness of 0.7 mm and high flexibility

Rezazadeh

Kianvash

Zhao

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Generally, EMW absorption materials include dielectric loss materials and magnetic loss materials. − Dielectric loss materials have been of widespread concern in the past decades, − such as graphene and its derivatives and MXenes. − These kinds of materials have the merits of superior conduction property, high specific surface area, and multilayered structure. However, they have some shortages too.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of an Ultralight Ni-MOF-rGO Aerogel with Both Dielectric and Magnetic Performances for Enhanced Microwave Absorption: Microspheres with Hollow Structure Grow onto the GO Nanosheets

Cao

Yang

Zhao

et al. 2023

ACS Appl. Mater. Interfaces

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An ultralight Ni-MOF-rGO aerogel which possess the merits of not only broad bandwidth and strong absorption but also lightweight and thin matching thickness is fabricated through a hydrothermal treatment, freeze-drying, and annealing procedure. The Ni@C microspheres are dispersed randomly and evenly on the graphene oxide (GO) nanosheets, which can be proved through SEM and TEM results. The electromagnetic parameters of the composite can be adjusted by changing the mass ratio of the MOF and GO to endow the material with both good impedance matching and superior electromagnetic wave absorption performances. Consequently, the resulting composite shows outstanding microwave absorption performance, which achieves strong absorption (−51.19 dB) and broad effective absorption bandwidth (6.32 GHz) with a thickness of 1.9 mm while the filling content is only 2 wt %. In addition, the multiple loss mechanisms of the Ni-MOF-rGO aerogel are illustrated, including conduction loss, dipolar polarization, interfacial polarization, magnetic resonance, and eddy current loss. In a word, the extraordinary microwave absorption performance is ascribed to the synergistic effects of the unique multiple layered structure of GO and the hollow core−shell structure of the Ni@C microsphere. This work demonstrates that the ultralight aerogel with excellent electromagnetic wave absorption performance is a promising strategy for microwave absorption application.

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Enhancing electromagnetic wave absorption with core‐shell structured SiO₂@MXene@MoS₂ nanospheres

Jiang,

Wang,

Song

et al. 2024

Carbon Energy

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Material composition and structural design are important factors influencing the electromagnetic wave (EMW) absorption performance of materials. To alleviate the impedance mismatch attributed to the high dielectric constant of Ti3C2Tx MXene, we have successfully synthesized core‐shell structured SiO2@MXene@MoS2 nanospheres. This architecture, comprising SiO2 as the core, MXene as the intermediate layer, and MoS2 as the outer shell, is achieved through an electrostatic self‐assembly method combined with a hydrothermal process. This complex core‐shell structure not only provides a variety of loss mechanisms that effectively dissipate electromagnetic energy but also prevents self‐aggregation of MXene and MoS2 nanosheets. Notably, the synergistic combination of SiO2 and MoS2 with highly conductive MXene enables the suitable dielectric constant of the composites, ensuring optimal impedance matching. Therefore, the core‐shell structured SiO2@MXene@MoS2 nanospheres exhibit excellent EMW absorption performance, featuring a remarkable minimum reflection loss (RLmin) of −52.11 dB (2.4 mm). It is noteworthy that these nanospheres achieve an ultra‐wide effective absorption bandwidth (EAB) of 6.72 GHz. This work provides a novel approach for designing and synthesizing high‐performance EMW absorbers characterized by “wide bandwidth and strong reflection loss.”

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Novel ZnFe2O4@MnO2@MXene composites with ultrathin thickness and excellent electromagnetic absorption performance

Cited by 21 publications

References 51 publications

A study on microwave absorption properties of polyaniline/nitrile rubber/graphene/Fe₃O₄ composites with a thickness of 0.7 mm and high flexibility

A study on microwave absorption properties of polyaniline/nitrile rubber/graphene/Fe₃O₄ composites with a thickness of 0.7 mm and high flexibility

Fabrication of an Ultralight Ni-MOF-rGO Aerogel with Both Dielectric and Magnetic Performances for Enhanced Microwave Absorption: Microspheres with Hollow Structure Grow onto the GO Nanosheets

Enhancing electromagnetic wave absorption with core‐shell structured SiO₂@MXene@MoS₂ nanospheres

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Novel ZnFe2O4@MnO2@MXene composites with ultrathin thickness and excellent electromagnetic absorption performance

Cited by 21 publications

References 51 publications

A study on microwave absorption properties of polyaniline/nitrile rubber/graphene/Fe3O4 composites with a thickness of 0.7 mm and high flexibility

A study on microwave absorption properties of polyaniline/nitrile rubber/graphene/Fe3O4 composites with a thickness of 0.7 mm and high flexibility

Fabrication of an Ultralight Ni-MOF-rGO Aerogel with Both Dielectric and Magnetic Performances for Enhanced Microwave Absorption: Microspheres with Hollow Structure Grow onto the GO Nanosheets

Enhancing electromagnetic wave absorption with core‐shell structured SiO2@MXene@MoS2 nanospheres

Contact Info

Product

Resources

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A study on microwave absorption properties of polyaniline/nitrile rubber/graphene/Fe₃O₄ composites with a thickness of 0.7 mm and high flexibility

A study on microwave absorption properties of polyaniline/nitrile rubber/graphene/Fe₃O₄ composites with a thickness of 0.7 mm and high flexibility

Enhancing electromagnetic wave absorption with core‐shell structured SiO₂@MXene@MoS₂ nanospheres