Preparation and microwave absorption properties of asphalt carbon coated reduced graphene oxide/magnetic CoFe2O4 hollow particles modified multi-wall carbon nanotube composites

Zhang, Kaichuang; Gao, Xinbao; Zhang, Qian; Li, Tianpeng; Chen, Hao; Chen, Xuefang

doi:10.1016/j.jallcom.2017.06.327

Cited by 77 publications

(17 citation statements)

References 42 publications

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“…The coercivity of Co/ NC is 139.63 Oe, which is lower than those of Fe-Co/NC and Fe-Co/NC/rGO (270.90 and 300. 16 Oe, respectively).…”

Section: Magnetic Propertiesmentioning

confidence: 90%

“…According to the microwave absorption mechanism, when absorbers have magnetic loss, dielectric loss, and impedance match, more microwaves can enter the interior of the materials and be converted into other forms of energy and dissipated [8,9]. In past decades, many efforts were devoted to researching composites for enhancing microwave absorption, such as (Fe, Ni, Co)/C [10][11][12], (Fe, Ni, Co)/rGO [13][14][15], MFe 2 O 4 /rGO (M = Fe, Ni, Co) [16][17][18][19], MFe 2 O 4 / CNTs [20][21][22], and NiO/SiO 2 /Fe 3 O 4 /rGO [23,24]. However, these materials have the shortcoming of narrow absorption bands, which seriously hinders their practical applications.…”

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confidence: 99%

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Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption

Wang

et al. 2019

Nano-Micro Lett.

154

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HIGHLIGHTS• Hierarchically porous Fe-Co/N-doped carbon/rGO (Fe-Co/NC/rGO) composites were successfully prepared. Macropores, mesopores, and micropores coexisted in the composites.• Hierarchically porous Fe-Co/NC/rGO showed effective bandwidth of 9.29 GHz.ABSTRACT Developing lightweight and broadband microwave absorbers for dealing with serious electromagnetic radiation pollution is a great challenge. Here, a novel Fe-Co/N-doped carbon/reduced graphene oxide (Fe-Co/NC/rGO) composite with hierarchically porous structure was designed and synthetized by in situ growth of Fe-doped Cobased metal organic frameworks (Co-MOF) on the sheets of porous cocoon-like rGO followed by calcination. The Fe-Co/NC composites are homogeneously distributed on the sheets of porous rGO. The Fe-Co/NC/rGO composite with multiple components (Fe/Co/NC/rGO) causes magnetic loss, dielectric loss, resistance loss, interfacial polarization, and good impedance matching. The hierarchically porous structure of the Fe-Co/NC/rGO enhances the multiple reflections and scattering of microwaves. Compared with the Co/NC and Fe-Co/NC, the hierarchically porous Fe-Co/NC/rGO composite exhibits much better microwave absorption performances due to the rational composition and porous structural design. Its minimum reflection loss (RL min ) reaches − 43.26 dB at 11.28 GHz with a thickness of 2.5 mm, and the effective absorption frequency (RL ≤ − 10 dB) is up to 9.12 with the same thickness of 2.5 mm. Moreover, the widest effective bandwidth of 9.29 GHz occurs at a thickness of 2.63 mm. This work provides a lightweight and broadband microwave absorbing material while offering a new idea to design excellent microwave absorbers with multicomponent and hierarchically porous structures.

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“…The coercivity of Co/ NC is 139.63 Oe, which is lower than those of Fe-Co/NC and Fe-Co/NC/rGO (270.90 and 300. 16 Oe, respectively).…”

Section: Magnetic Propertiesmentioning

confidence: 90%

mentioning

confidence: 99%

Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption

Wang

et al. 2019

Nano-Micro Lett.

154

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“…[12][13][14][15] As is well known, the EM wave absorption performance of a material is determined by complex permittivity, complex permeability and impedance matching, which are affected by its components, microstructure, size and so on. 16,17 Hence, by rational cooperation of the magnetic components (Fe 3 26 carbon ber, 27 graphene, 28 porous carbon materials 29 ) within the magnetic/carbon-based hybrids, competent EM wave absorbers can be achieved.…”

Section: -11mentioning

confidence: 99%

Economical synthesis of composites of FeNi alloy nanoparticles evenly dispersed in two-dimensional reduced graphene oxide as thin and effective electromagnetic wave absorbers

Zhang

et al. 2018

RSC Adv.

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a Developing electromagnetic wave absorbing materials prepared by a facile and economical way is a great challenge. Herein, we report a feasible route to synthesize a series of two-dimensional FeNi/rGO composites by a hydrothermal method followed by a carbonization process. The characterization confirms that nano-sized FeNi alloy nanoparticles are evenly supported onto graphene sheets without aggregation. The homogeneous dispersion of the nanoparticles may result from the introduction of glucose and the oxygen-containing groups on the surface of the graphene oxide. Measurements show that the microwave attenuation capability of the composites can be improved dramatically by adjusting the proportion of dielectric and magnetic components. Consequently, the two-dimensional magnetic material (FeNi/rGO-100) exhibits an excellent microwave absorption performance. In detail, the minimum reflection loss of À42.6 dB and effective bandwidth of 4.0 GHz can be reached with a thinner thickness of 1.5 mm. This study demonstrates that synergistic effects among the magnetic particles, reduced graphene oxide and amorphous carbon layers give rise to the highlighted microwave attenuation ability. Overall, the FeNi/rGO composite is a promising candidate to be used as a microwave absorber, and the feasible and economical method has shown potential application to construct multitudinous two-dimensional materials.

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“…In order to further practical applications, absorbing materials should be thin thickness and lightweight with excellent absorption efficiency in a broad frequency band at a low filler loading ratio. Thus, much effort has been paid in the design of lightweight absorbing materials, such as core‐shell structures, hollow structures, and metal/carbon composites . Among these structures, carbon‐based materials have been taken as the most promising candidates due to their tunable properties, low density and high dielectric loss, for instance, Ni/graphitic, Fe/C, and FeNi 3 @C have been used to enhance electromagnetic attenuation .…”

Section: Introductionmentioning

confidence: 99%

Fe/nanoporous carbon hybrid derived from metal–organic framework for highly effective microwave absorption

Heng

Zhang

Chen

et al. 2019

Applied Organom Chemis

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A novel Fe/nanoporous carbon (Fe/NPC) composite was synthesized via Fe3O4 nanoparticles coating in metal–organic framework. The pyrolysis conditions are carefully optimized, and the effects of pyrolysis temperature on electromagnetic parameters have been systematically analyzed. Among these candidates, the Fe/NPC composite pyrolyzed at 800 °C (Fe/NPC‐800) shows the eminent microwave absorption due to interface polarization and well matched characteristic impedance. The results indicate that the effective reflection loss absorption bandwidth of Fe/NPC‐800 reaches 5.6 GHz (12.4–18 GHz) with a thickness of 1.8 mm. It provides an exciting clue for the fabrication of lightweight and highly effective microwave absorbers in the future.

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Preparation and microwave absorption properties of asphalt carbon coated reduced graphene oxide/magnetic CoFe2O4 hollow particles modified multi-wall carbon nanotube composites

Cited by 77 publications

References 42 publications

Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption

Rational Construction of Hierarchically Porous Fe–Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption

Economical synthesis of composites of FeNi alloy nanoparticles evenly dispersed in two-dimensional reduced graphene oxide as thin and effective electromagnetic wave absorbers

Fe/nanoporous carbon hybrid derived from metal–organic framework for highly effective microwave absorption

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