Composites based on layered materials for absorption of microwaves and electromagnetic shielding

Kumar, Rajesh; Sahoo, Sumanta; Joanni, Ednan

doi:10.1016/j.carbon.2023.118072

Cited by 66 publications

(14 citation statements)

References 238 publications

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“…When ease of access to commercially available dianhydrides ( e.g. , ethylenediaminetetraacetic dianhydride, benzophenone-3,3′,4,4′-tetracarboxylic dianhydride, and perylene-3,4,9,10-tetracarboxylic dianhydride) and other bifunctional cross-linking agents was combined with well-practiced carbon nanomaterials covalent surface modification approaches, , an acceptable size control on sandwiched nanoparticles in between graphene nanosheets can be realized for several applications from energy storage materials − to electromagnetic shielding and membranes . In addition to 2D graphene nanoplatelets, given the available covalent surface modification techniques, a library of 2D materials such as MoS 2 , , h-BN, TiS 2 , MoSe 2 , and Bi 2 Te 3 can be processed similarly to prepare hierarchical nanoscaffolds of other 2D-materials.…”

Section: Discussionmentioning

confidence: 99%

Precision Covalent Chemistry for Fine-Size Tuning of Sandwiched Nanoparticles between Graphene Nanoplatelets

Bayazit

2023

ACS Omega

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The covalent functionalization of graphene for enhancing their stability, improving their electrical or optical properties, or creating hybrid structures has continued to attract extensive attention; however, a fine control of nanoparticle (NP) size between graphene layers via covalent-bridging chemistry has not yet been explored. Herein, precision covalent chemistryassisted sandwiching of ultrasmall gold nanoparticles (US−AuNP) between graphene layers is described for the first time. Covalently interconnected graphene (CIG) nanoscaffolds with a preadjusted finely tuned graphene layer−layer distance facilitated the formation of sandwiched US−AuNPs (∼1.94 ± 0.20 nm, 422 AuNPs). The elemental composition analysis by X-ray photoelectron spectroscopy displayed an aniline group addition per ∼55 graphene carbon atoms. It provided information on covalent interconnection via amidic linkages, while Raman spectroscopy offered evidence of covalent surface functionalization and the number of graphene layers (≤2−3 layers). High-resolution transmission electron microscopy images indicated a layer−layer distance of 2.04 nm, and low-angle X-ray diffraction peaks (2θ at 24.8 and 12.5°) supported a layer−layer distance increase compared to the characteristic (002) reflection (2θ at 26.5°). Combining covalent bridging with NP synthesis may provide precise control over the metal/metal oxide NP size and arrangement between 2D layered materials, unlocking new possibilities for advanced applications in energy storage, electrochemical shielding, and membranes.

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Section: Discussionmentioning

confidence: 99%

Precision Covalent Chemistry for Fine-Size Tuning of Sandwiched Nanoparticles between Graphene Nanoplatelets

Bayazit

2023

ACS Omega

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“…due to their exceptional flexible and conductive nature, excellent mechanical strength with impedance matching, and low densities . Also, composite-based layered materials such as graphene, MXenes, and transition metal dichalcogenides were incorporated into the polymeric matrix to improve the EMI shielding performance . Especially, reduced graphene oxide (rGO) has been utilized due to its high surface area and high dielectric loss with a conducting nature for EM microwave applications.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Dy₂NiMnO₆/Reduced Graphene Oxide Nanocomposites and Their Catalytic, Electromagnetic Shielding, and Electrochemical Properties

Sahoo,

Rao Bhaviripudi

et al. 2024

ACS Omega

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Multifunctional nanocomposites have shown great interest in clean energy systems and environmental applications in recent years. Herein, we first reported the synthesis of Dy 2 NiMnO 6 (DNMO)/reduced graphene oxide (rGO) nanocomposites utilizing a hybrid approach involving sol−gel and solvothermal processes. Subsequently, we investigated these nanocomposites for their applications in catalysis, electromagnetic interference shielding, and supercapacitors. A morphological study suggests spherical-shaped DNMO nanoparticles of an average size of 382 nm that are uniformly distributed throughout the surface without any agglomeration. The as-prepared nanocomposites were used as catalysts to investigate the catalytic reduction of 4-nitrophenol in the presence of NaBH 4 . DNMO/rGO nanocomposites demonstrate superior catalytic activity when compared with bare DNMO, with the rate of reduction being influenced by the composition of the DNMO/rGO nanocomposites. In addition, novel multifunctional DNMO/rGO was incorporated into polyvinylidene difluoride (PVDF) to develop a flexible nanocomposite for electromagnetic shielding applications and exhibited a shielding effectiveness of 6 dB with 75% attenuation at a frequency of 8.5 GHz compared to bare PVDF and PVDF-DNMO nanocomposite. Furthermore, the electrochemical performance of DNMO/rGO nanocomposites was investigated as an electrode material for supercapacitors, exhibiting the highest specific capacitance of 260 F/g at 1 A/g. These findings provide valuable insights into the design of DNMO/ rGO nanocomposites with remarkable performance in sustainable energy and environmental applications.

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“…Graphene has emerged as a suitable thin and lightweight EMI shielding material owing to its excellent conductivity, low density, and easy processability. Recent studies have demonstrated thin and flexible graphene-based films (GFs), fabricated by assembling graphene nanosheets, with an excellent EMI shielding performance. − Sandwich-like TiO 2 –Ti 3 C 2 T X /graphene films prepared by vacuum filtration and pyrolysis showed an electromagnetic interference shielding effectiveness (EMI SE) of 28.0 dB at a thin thickness of 9.17 μm . Zheng et al fabricated porous three-dimensional carbon fiber/reduced graphene oxide film and obtained a high EMI SE of 33.7 dB with the thickness of 0.3 mm .…”

Section: Introductionmentioning

confidence: 99%

Thin, Flexible, and High-Strength Graphene Films Modified with CoFe₂O₄ Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding

Liu,

Zhang,

Wang

et al. 2023

ACS Appl. Nano Mater.

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Thin, high-strength graphene films are at the forefront of research regarding electromagnetic interference (EMI) shielding applications. Herein, we synthesized a novel graphene-based film (CoFe 2 O 4 nanoparticle-carbon nanotubes (CFO−CNTs)/reduced graphene oxide (RGO)p) reinforced with porous CFO−CNTs nanocomposites and self-cross-linking trimethylolpropane triacrylate between the RGO sheets. Only a 15-μm-thick (thin) CFO−CNTs/RGOp film exhibits an excellent EMI shielding effectiveness (EMI SE) value of 38.7 dB as well as an excellent tensile strength (84.5 MPa) because of synergistic interfacial and cross-linking interactions. Further, the film subjected to ultraviolet aging retains 86.6% and 82.4% of its original EMI SE and tensile strength, respectively, indicating high durability. Because of the outstanding integrated features and high durability, the as-prepared film can be used to shield aircrafts and miniaturized electronic devices from EMIs in extreme environments.

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Composites based on layered materials for absorption of microwaves and electromagnetic shielding

Cited by 66 publications

References 238 publications

Precision Covalent Chemistry for Fine-Size Tuning of Sandwiched Nanoparticles between Graphene Nanoplatelets

Precision Covalent Chemistry for Fine-Size Tuning of Sandwiched Nanoparticles between Graphene Nanoplatelets

Multifunctional Dy₂NiMnO₆/Reduced Graphene Oxide Nanocomposites and Their Catalytic, Electromagnetic Shielding, and Electrochemical Properties

Thin, Flexible, and High-Strength Graphene Films Modified with CoFe₂O₄ Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding

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Composites based on layered materials for absorption of microwaves and electromagnetic shielding

Cited by 66 publications

References 238 publications

Precision Covalent Chemistry for Fine-Size Tuning of Sandwiched Nanoparticles between Graphene Nanoplatelets

Precision Covalent Chemistry for Fine-Size Tuning of Sandwiched Nanoparticles between Graphene Nanoplatelets

Multifunctional Dy2NiMnO6/Reduced Graphene Oxide Nanocomposites and Their Catalytic, Electromagnetic Shielding, and Electrochemical Properties

Thin, Flexible, and High-Strength Graphene Films Modified with CoFe2O4 Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding

Contact Info

Product

Resources

About

Multifunctional Dy₂NiMnO₆/Reduced Graphene Oxide Nanocomposites and Their Catalytic, Electromagnetic Shielding, and Electrochemical Properties

Thin, Flexible, and High-Strength Graphene Films Modified with CoFe₂O₄ Nanoparticle–Carbon Nanotubes Composites for Electromagnetic Interference Shielding