A facile hydrothermal synthesis of MnO<sub>2</sub> nanorod–reduced graphene oxide nanocomposites possessing excellent microwave absorption properties

Wang, Yan; Guan, Hongtao; Du, Shangfeng; Wang, Yude

doi:10.1039/c5ra15165a

Cited by 117 publications

(62 citation statements)

References 53 publications

(46 reference statements)

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“…3a and b , the flexible two-dimensional RGO sheets and FeOOH NRs can be observed clearly over the obtained C2. Similar to MnO 2 NRs-RGO and MnO 2 @Fe-G reported elsewhere 37 , 38 , the obtained FeOOH NRs, show very uniform sizes in diameter and length, load tightly on the thin flaky RGO sheets or are enwrapped by the RGO sheets. The TEM investigation (as shown in Fig.…”

Section: Resultssupporting

confidence: 84%

Preparation of porous Fe2O3 nanorods-reduced graphene oxide nanohybrids and their excellent microwave absorption properties

Cai

et al. 2017

Sci Rep

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In this paper, α-Fe2O3 nanoparticles (NPs)-reduced graphene oxide (RGO), α-FeOOH nanorods (NRs)-RGO and porous α-Fe2O3 NRs-RGO could be selectively synthesized by hydrothermal method. The investigations indicated that the obtained α-Fe2O3 NPs, α-FeOOH NRs and porous α-Fe2O3 NRs were either attached on the surface of RGO sheets or coated uniformly by the RGO sheets. And the as-prepared nanohybrids exhibited excellent microwave absorption performance, which was proved to be ascribed to the quarter-wavelength matching model. The optimum reflection loss (RL) values for α-Fe2O3 NPs-RGO, α-FeOOH NRs-RGO and porous α-Fe2O3 NRs-RGO were ca. −32.3, −37.4 and −71.4 dB, respectively. Moreover, compared to the obtained α-Fe2O3 NPs-RGO and α-FeOOH NRs-RGO, the as-prepared porous α-Fe2O3 NRs-RGO nanohybrids exhibited enhanced microwave absorption properties because of their special structure and synergetic effect. The possible enhanced microwave absorption mechanisms were discussed in details. Our results confirmed that the geometrical morphology had a great influence on their microwave absorption properties, which provided a promising approach to exploit high performance microwave absorbing materials.

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Section: Resultssupporting

confidence: 84%

Preparation of porous Fe2O3 nanorods-reduced graphene oxide nanohybrids and their excellent microwave absorption properties

Cai

et al. 2017

Sci Rep

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“…These defects could act as polarized centres for the dipole/electrons polarization, which may be contributed to enhance the dielectric loss and electromagnetic energy dissipation by reason of Debye relaxation. Debye relaxation occurs when the dipole and electrons polarizations could not match up with the changes of the electromagnetic eld in the high frequency, 46,47 which plays an import role in microwave absorbing and shielding. Furthermore, two broad humps at 452.5 cm À1 (Fig.…”

Section: Phase Crystallinitymentioning

confidence: 99%

Biomass carbon derived from pine nut shells decorated with NiO nanoflakes for enhanced microwave absorption properties

et al. 2019

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“…Their work also proved that rGO-based composites with a graded-dielectric multilayer has an excellent EM absorption potential [19]. Wang et al prepared MnO 2 -rGO nanocomposites via a hydrothermal method and the heterostructure exhibited the highest reflection loss (RL) of −37 dB at 16.8 GHz [20]. The research group of Zhao and Ji used an in situ synthesis method to fabricate an ACNT/rGO/BaFe 12 O 19 composite.…”

Section: Introductionmentioning

confidence: 99%

NiS2@rGO Nanosheet Wrapped with PPy Aerogel: A Sandwich-Like Structured Composite for Excellent Microwave Absorption

Zhang

Chen

et al. 2019

Nanomaterials

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To reduce electromagnetic pollution as well as increase the accuracy of high-precision electronic equipment, more attention has been paid to new electromagnetic wave (EMW) absorbing materials, which have the advantages of strong absorption, wide absorption bands, and a narrow thickness. In this study, a novel ternary type of the NiS2@rGO/polypyrrole (PPy) sandwich-like structured composites was synthesized via a facile two-step method, in which the hydrothermal method was used to prepare NiS2@rGO binary composites and then the in situ polymerization method was used to synthesize the PPy, which acted as the outer layer of the sandwich-like structure. The morphologies and electromagnetic absorption performance of the NiS2@rGO/PPy were measured and investigated. A sample with 6 wt% NiS2@rGO/PPy loading paraffin-composite obtained an outstanding reflection loss (RL) of −58.7 dB at 16.44 GHz under a thickness of 2.03 mm. Simultaneously, the effective electromagnetic wave absorption bandwidth for RL < −10 dB, which covered 7.04 to 18.00 GHz (10.96 GHz), was achieved by changing the thickness of the absorber from 2.0 to 3.5 mm. The results not only suggest that the NiS2@rGO/PPy composite has excellent performance in the field of EMW absorption but also prove that the novel sandwich-like structure can contribute to appropriate impedance matching through multiple relaxation and interfacial polarization processes.

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A facile hydrothermal synthesis of MnO₂ nanorod–reduced graphene oxide nanocomposites possessing excellent microwave absorption properties

Abstract: MnO2 nanorod/reduced graphene oxide nanocomposites synthesized by a simple one-step hydrothermal method significantly improved the electromagnetic wave absorption performance and widened the effective absorption bandwidth.

Cited by 117 publications

References 53 publications

Preparation of porous Fe2O3 nanorods-reduced graphene oxide nanohybrids and their excellent microwave absorption properties

Preparation of porous Fe2O3 nanorods-reduced graphene oxide nanohybrids and their excellent microwave absorption properties

Biomass carbon derived from pine nut shells decorated with NiO nanoflakes for enhanced microwave absorption properties

NiS2@rGO Nanosheet Wrapped with PPy Aerogel: A Sandwich-Like Structured Composite for Excellent Microwave Absorption

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A facile hydrothermal synthesis of MnO2 nanorod–reduced graphene oxide nanocomposites possessing excellent microwave absorption properties

Abstract: MnO2 nanorod/reduced graphene oxide nanocomposites synthesized by a simple one-step hydrothermal method significantly improved the electromagnetic wave absorption performance and widened the effective absorption bandwidth.

Cited by 117 publications

References 53 publications

Preparation of porous Fe2O3 nanorods-reduced graphene oxide nanohybrids and their excellent microwave absorption properties

Preparation of porous Fe2O3 nanorods-reduced graphene oxide nanohybrids and their excellent microwave absorption properties

Biomass carbon derived from pine nut shells decorated with NiO nanoflakes for enhanced microwave absorption properties

NiS2@rGO Nanosheet Wrapped with PPy Aerogel: A Sandwich-Like Structured Composite for Excellent Microwave Absorption

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A facile hydrothermal synthesis of MnO₂ nanorod–reduced graphene oxide nanocomposites possessing excellent microwave absorption properties