ZnFe2O4 nanospheres decorated residual carbon from coal gasification fine slag as an ultra-thin microwave absorber

Zhang, Xingzhao; Zhang, Yuanchun; He, Jun; Li, Hanxu; Bai, Yonghui; Gao, Shuling

doi:10.1016/j.fuel.2022.125811

Cited by 57 publications

(21 citation statements)

References 80 publications

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“…80 (3) The designed electrocatalyst presents a hollow characteristic, thus creating a richer electrochemical active area for the catalytic reaction and accelerating the transfer of mass/charges. 81,82 (4) The diversified nitrogen doping in the carbon framework further improves the conductivity of the electrocatalyst, and can also effectively protect the active sites, thereby maintaining its outstanding electrocatalytic stability. 83,84 As a result, under the synergistic effect of the above multiple favorable factors, an efficient bi-functional oxygen catalytic reaction is realized.…”

Section: Resultsmentioning

confidence: 99%

Atomic-level orbital coupling in a tri-metal alloy site enables highly efficient reversible oxygen electrocatalysis

Chen

Zhang

et al. 2023

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Atomic-level orbital coupling in a tri-metal alloy site enables highly efficient reversible oxygen electrocatalysis

Chen

Zhang

et al. 2023

J. Mater. Chem. A

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“…For sample Fe−Ni (0.5) , the lowest EAB max value of 4.72 GHz was attained. Both Fe−Ni (1) and Fe−Ni (2) achieved the EAB max of 5.36 GHz; however, the former's matched thickness was somewhat lower. Meanwhile, the RL min value for the Fe−Ni composite was obtained from the sample Fe−Ni (2) , which was −47.898 dB at 1.75 mm.…”

Section: Microwave Absorption and Performancementioning

confidence: 93%

“…Besides, Figure 5a,b, Figure 5c,d, and and Figure 5g,h correspond to the 3D and 2D plots of RL of samples Fe− Ni (0.5) , Fe−Ni (1) , and Fe−Ni (2) , respectively. The outcomes demonstrate that the products generated by modulating various atomic molar ratios exhibit substantial changes in the EMW absorption characteristic.…”

Section: Microwave Absorption and Performancementioning

confidence: 94%

In Situ Synthesis of Heterostructured Fe–Ni Nanowires with Tunable Electromagnetic Wave Absorption Capabilities

Yang

Cai

Ruan

et al. 2023

ACS Appl. Nano Mater.

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One-dimensional iron–nickel (Fe–Ni) heterogeneous nanowires with superior electromagnetic wave (EMW) absorption were successfully prepared by a magnetic-field-assisted liquid-phase reduction method. The electromagnetic properties of the absorber were controllably tuned by changing the atomic molar ratio of Fe to Ni. The composite with an Fe:Ni atomic molar ratio of 1:1.5 exhibited the finest EMW absorption characteristics. With a matched thickness of 2.175 mm, the minimum reflection loss (RLmin) at 18 GHz can be as high as 26.106 dB. Also, the majority of the Ku-band is covered by the effective absorption bandwidth (EAB, RL ≤ −10 dB), which is up to 6.08 GHz at 2.6 mm with a filler content of 25%. The excellent absorber performance is due to one’s own rich heterogeneous interface to conciliate the dielectric and magnetic losses. The successful exploration of the one-dimensional heterogeneous structure EMW absorber provides important insights for the future sensible fabrication of absorbers with excellent EMW absorption capability.

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“…Communication technologies and electronic facilities have developed with high speed nowadays, which has caused electromagnetic radiation to become an increasingly serious problem. − Electromagnetic radiation not only has an influence on communication or electronic equipment but also can be harmful to human health. − Therefore, it is urgent to find a valid strategy to solve this problem. − Developing electromagnetic wave (EMW) absorption materials is a promising strategy to shield or alleviate electromagnetic radiation. − And the ideal EMW absorption materials need the merits of being lightweight and having thin matching thickness, strong absorption, and broad bandwidth. − To achieve this aim, researchers are committed to integrating these performances into one composite. − …”

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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ZnFe2O4 nanospheres decorated residual carbon from coal gasification fine slag as an ultra-thin microwave absorber

Cited by 57 publications

References 80 publications

Atomic-level orbital coupling in a tri-metal alloy site enables highly efficient reversible oxygen electrocatalysis

Atomic-level orbital coupling in a tri-metal alloy site enables highly efficient reversible oxygen electrocatalysis

In Situ Synthesis of Heterostructured Fe–Ni Nanowires with Tunable Electromagnetic Wave Absorption Capabilities

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

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