A novel multi-cavity structured MOF derivative/porous graphene hybrid for high performance microwave absorption

Song, Shangwei; Zhang, Aitang; Chen, Lin; Jia, Qiang; Zhou, Congli; Liu, Jingquan; Wang, Xiaoxia

doi:10.1016/j.carbon.2021.01.138

Cited by 112 publications

(39 citation statements)

References 49 publications

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“…The direct carbonization of MOF simultaneously transforms metal ions to metals, alloys, and/or metal oxides (e.g., Fe, Co, Ni, MnO 2 , ZnO, and ZrO 2 ) as well as organic ligands to porous carbon with retained morphology. [220][221][222][223][224] The diversity in the components and structures of carbonized MOFs has inspired the devotion of increasing efforts to the exploration of their potential applications to EM wave absorption. For example, the porous Co/C dodecahedrons derived from ZIF-67 organize the synergistic EM loss capacities of dielectric C and magnetic Co nanoparticles, producing a maximum RL value of −35.0 dB at a thickness of 4.0 mm.…”

Section: Mof Derivativesmentioning

confidence: 99%

Dimensional Design and Core–Shell Engineering of Nanomaterials for Electromagnetic Wave Absorption

et al. 2022

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Herein, the advances in low-dimensional core-shell EM wave absorption materials are outlined and a selection of the most remarkable examples is discussed. The derived key information regarding dimensional design, structural engineering, performance, and structure-function relationship are comprehensively summarized. Moreover, the investigation of the cuttingedge mechanisms is given particular attention. Additional applications, such as oxidation resistance and self-cleaning functions, are also introduced. Finally, insight into what may be expected from this rapidly expanding field and future challenges are presented.

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Section: Mof Derivativesmentioning

confidence: 99%

Dimensional Design and Core–Shell Engineering of Nanomaterials for Electromagnetic Wave Absorption

et al. 2022

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“…Song et al used ingenious three-dimensional porous graphene (PG) as template to grow MOF-5 and Fe(III)-MOF-5 and treated at high-temperature to prepare ZnO/C@PG and ZnO/ZnFe 2 O 4 /C@PG materials (Fig. 14 e) [ 45 ]. The pyrolysis products still maintained the nanoscale hollow structure, which increases the propagation path of electromagnetic wave in the MAM (Fig.…”

Section: Mams Derived From Mof Compositesmentioning

confidence: 99%

State of the Art and Prospects in Metal-Organic Framework-Derived Microwave Absorption Materials

et al. 2022

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Microwave has been widely used in many fields, including communication, medical treatment and military industry; however, the corresponding generated radiations have been novel hazardous sources of pollution threating human’s daily life. Therefore, designing high-performance microwave absorption materials (MAMs) has become an indispensable requirement. Recently, metal–organic frameworks (MOFs) have been considered as one of the most ideal precursor candidates of MAMs because of their tunable structure, high porosity and large specific surface area. Usually, MOF-derived MAMs exhibit excellent electrical conductivity, good magnetism and sufficient defects and interfaces, providing obvious merits in both impedance matching and microwave loss. In this review, the recent research progresses on MOF-derived MAMs were profoundly reviewed, including the categories of MOFs and MOF composites precursors, design principles, preparation methods and the relationship between mechanisms of microwave absorption and microstructures of MAMs. Finally, the current challenges and prospects for future opportunities of MOF-derived MAMs are also discussed."Image missing"

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“…Especially, Figure 6b shows the achiral nanoparticles have almost no magnetic loss property, while the tanδ μ of the single chiral fibers was 0.32 at 18 GHz. The stronger dielectric and magnetic loss parameters of single chiral fibers induced superior attenuation constant (α, Figure 6c) [53] Adv. Optical Mater.…”

Section: Absorption Properties and Mechanism Of Chiral Helical Fibersmentioning

confidence: 99%

Chiral Asymmetric Polarizations Generated by Bioinspired Helical Carbon Fibers to Induce Broadband Microwave Absorption and Multispectral Photonic Manipulation

Huang

Duan

Shi

et al. 2022

Advanced Optical Materials

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as stealth systems, [1] electromagnetic pollu tion eradicators, [2] and various electronic and communicational devices, [3] etc. [4] Broadband absorption is key factor of MAMs, which derived from two types of materials: [5] dielectric loss materials (graphene, [6] carbon nanotubes, [7] biomass carbon materials, [8] conductive polymer, [9] ZnO, [10] MnO 2 , [11] etc.) and magnetic loss materials (ferrite, [12] carbonyl iron, [13] high entropy alloys, [14] and other ferromagnetic alloys [15] ). Previous studies have demonstrated that MAMs with both dielectric loss (permittivity) and magnetic loss (permeability) were more easily to achieve good impedance match and thus broadband absorption. [16] Common method for fabricating mentioned electromagnetic complexes was mixing dielectric and magnetic matters, the carbonyl iron/carbon nanotubes composite absorbers could exhibit double resonance of the complex permittivity and permeability, thus reach effective absorption (reflection loss (RL) ≤ −10 dB) within 9.7-18 GHz regime under 1.4 mm thickness. [17] However, such addition of ferromagnetic materials brings some disadvantages such as high density and easy oxidation. The mentioned drawback could be avoid by some complicated synthetic method such as doping ferromagnetic ions in dielectric materials, [3] or preparing metal-organic frameworks (MOFs). [18] In addition to the intrinsic parameters of materials, metastructures [19] and microstructures [20] could give MAMs new design freedoms to broad absorption bandwidth. Metastructures can give MAMs additional effect to form metamaterials, [21] which could improve the absorption bandwidth by constructing equivalent circuit models, [22] vortex current loss, [23] overlapped reflections, [24] and polarization rotation, [25] etc., a metamaterial with square unit cells made of carbon black can achieve absorption bandwidth that 2.35-18 GHz (absorptivity more than 96.8%) under thickness of 17 mm, [26] our previous works brought optical rotation of chiral metamaterials based on high entropy alloys to consume microwaves, the effective absorption bandwidth (RL ≤ −10 dB) covered 4-5.54, 6.66-8.12, and 8.84-18 GHz under 20 mm thickness. [27] Whereas the thickness of metamaterials has to close to wavelength, because the loss effects of metamaterials are generated by subwavelength resonance that based on wave theory, thus difficult to broadband Chirality, in which electromagnetic characteristic promotes asymmetric polarization, is expected to realize broadband absorption for microwave absorption materials (MAMs). Herein, inspired by the microstructure of nepenthes, a scalable approach is reported for fabricating hierarchical-chiral helical carbon fibers with broadband microwave absorption as well as multispectral chiral manipulation. The chiral potential barriers are established by applying helically distributed stress to the fiber, which induce helical electric dipoles via positive and negative charges accumulated at the potential barriers. The states of polarization loss by Debye relaxat...

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A novel multi-cavity structured MOF derivative/porous graphene hybrid for high performance microwave absorption

Cited by 112 publications

References 49 publications

Dimensional Design and Core–Shell Engineering of Nanomaterials for Electromagnetic Wave Absorption

Dimensional Design and Core–Shell Engineering of Nanomaterials for Electromagnetic Wave Absorption

State of the Art and Prospects in Metal-Organic Framework-Derived Microwave Absorption Materials

Chiral Asymmetric Polarizations Generated by Bioinspired Helical Carbon Fibers to Induce Broadband Microwave Absorption and Multispectral Photonic Manipulation

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