Porous flower-like NiO@graphene composites with superior microwave absorption properties

Wang, Lei; Xing, Honglong; Gao, Shuling; Ji, Xiaoli; Shen, Ziyao

doi:10.1039/c6tc05179k

Cited by 209 publications

(64 citation statements)

References 43 publications

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“…Moreover, polarization and defect dipoles can contribute to the matched permittivity and conductivity of the CC@ZnO composites to satisfy the request of electromagnetic impedance, broadband, and strong RL. Moreover, the reflective electromagnetic wave with the same frequency and amplitude but opposite phase can be generated around the ZnO/CC interfaces, which will interact with the incident wave and eliminate the scattered signal energy, further resulting in the EM wave extinction at the reflection part …”

Section: Resultsmentioning

confidence: 99%

Oriented Polarization Tuning Broadband Absorption from Flexible Hierarchical ZnO Arrays Vertically Supported on Carbon Cloth

Wang

Xiao

et al. 2019

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A novel strategy is used to design large‐scale polarized carbon‐based dielectric composites with sufficient interaction to electromagnetic waves. Highly uniform polar zinc oxide arrays are vertically grown on a flexible conductive carbon cloth substrate (CC@ZnO) via an in situ orientation growth process. Anion regulation is found to be a key factor to the morphology of hierarchical ZnO arrays including single‐rod, cluster and tetrapod‐shaped. As a typical dielectric loss hybrid composite, the electromagnetic parameters of the CC@ZnO system and charge density distribution in polarized ZnO rods confirm that the 3D intertwined carbon cloth is used as a conductive network to provide ballistic electron transportation. Moreover, the defect‐rich ZnO arrays are well in contact with the CC substrate, favoring interface polarization, multiscattering, as well as impedance matching. Surprisingly, the efficient absorption bandwidth of the CC@ZnO‐1 composite can reach 10.6 GHz, covering all X and Ku bands. The oriented ZnO possesses oxygen vacancies and exposure to a large amount of intrinsic polar surfaces, encouraging the polarization behavior under microwave frequency. Optimized CC@ZnO materials exhibit fast electron transportation, strong microwave energy dissipation, and superior wide absorption. The results suggest that the CC@ZnO composites have promising potential as flexible, tuning, and broadband microwave absorbers.

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Section: Resultsmentioning

confidence: 99%

Oriented Polarization Tuning Broadband Absorption from Flexible Hierarchical ZnO Arrays Vertically Supported on Carbon Cloth

Wang

Xiao

et al. 2019

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212

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“…To address this problem, Wang et al. reported a porous flower‐like NiO@graphene composite with superior maximum reflection loss (−59.6 dB at 14.16 GHz) . The as‐fabricated structure features a highly porous and large surface to efficiently trap microwaves.…”

Section: Other Applicationsmentioning

confidence: 99%

“…[148] To address this problem, Wang et al reportedap orous flower-like NiO@graphene composite with superior maximum reflection loss (À59.6 dB at 14.16 GHz). [149] The as-fabricated structure features ah ighly porousa nd large surface to efficiently trap microwaves. Moreover,N iO significantly improves the absorbing property because of its high permittivity and electronic properties.…”

Section: Electromagnetic Wave Absorbersmentioning

confidence: 99%

Nickel Oxide/Graphene Composites: Synthesis and Applications

Liu

Gao

et al. 2018

Chemistry A European J

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Nickel oxide (NiO) has emerged as one of the most promising transition-metal oxides (TMOs) for electrochemical capacitors, batteries, catalysis, and electrochromic films, owing to its cost-effectiveness, abundance, and well-defined electrochemical properties. Recent studies have identified that mixing NiO with graphene or graphene derivatives results in novel composites with synergistic effects and superior electrochemical performance. This review summarizes the latest advances in composites of NiO with graphene or graphene derivatives. The synthetic strategies, morphologies, and electrochemical performance of these composites are introduced, as well as their electrochemical applications in supercapacitors, batteries, sensors, catalysis, and so forth. Finally, tentative conclusions and assessments regarding the opportunities and challenges for the future development of these composites and other TMOs/graphene or graphene-derived composites are presented.

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“…Ma et al [47] fabricated a novel 3D hierarchical Co 3 O 4 -rGO hybrid-architecture based on a facile, green, and highly tunable method, finding that the reflection loss (RL) values were relatively stable and the bandwidth was broadened at 353-473 K in the whole frequency spectrum that was investigated. Xing and co-workers [48] reported an enhancement in the microwave absorption performance of NiO/GNs hybrids, which were identified as promising materials for Ku-band EM applications. Enlightened by the abovementioned findings, it is suggested that introducing NiO onto WS 2 nanosheets could be viable in improving their EMA performance.…”

Section: Introductionmentioning

confidence: 99%

Synergetic dielectric loss and magnetic loss towards superior microwave absorption through hybridization of few-layer WS2 nanosheets with NiO nanoparticles

et al. 2020

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Porous flower-like NiO@graphene composites with superior microwave absorption properties

Abstract: Novel porous flower-like NiO@graphene composites with superior microwave absorption properties dues to good impedance matching, the special porous flower-like structure, polarization effects and conductivity loss.

Cited by 209 publications

References 43 publications

Oriented Polarization Tuning Broadband Absorption from Flexible Hierarchical ZnO Arrays Vertically Supported on Carbon Cloth

Oriented Polarization Tuning Broadband Absorption from Flexible Hierarchical ZnO Arrays Vertically Supported on Carbon Cloth

Nickel Oxide/Graphene Composites: Synthesis and Applications

Synergetic dielectric loss and magnetic loss towards superior microwave absorption through hybridization of few-layer WS2 nanosheets with NiO nanoparticles

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