Enhanced microwave absorption properties of biomass-derived carbon decorated with transition metal alloy at improved graphitization degree

Chen, Ji; Liu, Yi; Jia-dong, XU; Li, Yunyu; Shang, Yudong; Su, Xiaolei

doi:10.1016/j.jallcom.2021.161834

Cited by 71 publications

(13 citation statements)

References 45 publications

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“…Other natural biomaterials, such as wood [ 147 ], walnut shell [ 148 ], and spinach [ 149 ], are also attracted the attention of researchers due to particular structure. As depicted in 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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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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“…Magnetic materials can effectively improve the impedance matching of composite materials by adjusting the permeability. Liu and his team [110] developed wood-derived BC modified with a series of transition metal alloys. The introduced CoFe not only enhanced the magnetism of composites, but also had a catalytic effect on the graphitization of BC, promoting the potent dielectric loss and magnetic loss as well as optimal impedance matching.…”

Section: Biomass-derived 3d Compositesmentioning

confidence: 99%

Recent advance in three-dimensional porous carbon materials for electromagnetic wave absorption

et al. 2022

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With the increasingly serious electromagnetic wave (EMW) pollution, the development of high-performance EMW absorbing materials (EWAMs) has become a hot topic. Carbon-based EWAMs have excellent chemical stability, high electrical conductivity, and strong dielectric loss. In particular, three-dimensional (3D) porous carbon-based EWAMs have been widely developed in the EMW absorption field. The 3D porous structure not only reduces the materials' mass density, but also improves the multiple reflections of incident EMWs and impedance matching. The carbon-based EWAMs are thus expected to achieve the goals of low density, low thickness, wide absorption bandwidth, and strong absorption. Herein, we first restated the relevant theoretical basis and evaluation methods. Then, we summarized the recent research progress of 3D porous carbon-based EWAMs with the source of the materials as the main clue. Some unique and novel viewpoints were highlighted. Finally, the challenges and prospects of 3D porous carbon-based EWAMs were put forward, which is helpful for guiding a further development of high-performance EWAMs.

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“…[1][2][3][4][5] However, as a potential research object of electromagnetic wave absorbing (EMA) materials, the disadvantages of large density and serious agglomeration limit the construction of its effective conductive network under the condition of the same mass percentage of filler, resulting in a much lower dielectric loss than carbon at the same level. [6][7][8][9] To make full use of the advantages of metal materials, the balance of impedance matching and electromagnetic loss capability is the first consideration. Synergistic optimization of defect level, prospects in the regulation of metalbased materials.…”

Section: Introductionmentioning

confidence: 99%

“…DOI: 10.1002/smll.202203620 electronic conductivity, composition, and interfacial structure is an effective strategy to optimize the electromagnetic wave (EMW) dissipation capability. [9][10][11] In past research, a series of strategies have been widely used in the modification of metal materials. [12][13][14][15][16][17][18] For those metal embellished EMW absorbers, various synthesis strategies have been used for developing multicomponent composites, which optimizes the intrinsic electro magnetic (EM) responsiveness of com posites.…”

mentioning

confidence: 99%

Exploration of Twin‐Modified Grain Boundary Engineering in Metallic Copper Predominated Electromagnetic Wave Absorber

Liang

Zhang

2022

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113

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High density and skin effect restrict the research progress of metal predominated electromagnetic wave absorbing (EMA) materials. Although some works try to solve it, they do not focus on the metal itself and do not involve the optimization of the active site of the inherent defects of the metal. In this work, the modulation of morphology, composition, interface, defects, and conductivity is achieved by adjusting the ratio of copper salt to reducing agent chitosan. Uniquely, the appearance of twin boundaries (TBs) accelerates the ability of the homogeneous interfaces to transfer charges, resists the oxidation of metal Cu0, keeps the high electric conductivity of Cu0 nanoparticles, and enhances the conduction loss, which provides a boost for electromagnetic wave dissipation. As a result, the metal Cu0 predominated absorber (Cu‐NC (N‐doped carbon)−10,) exhibits an ultra‐width effective absorption band of 8.28 GHz (9.72–18.00 GHz) at a thickness of 2.47 mm and the minimum reflection loss (RL) value of −63.8 dB with a thickness of 2.01 mm. In short, this work explores the EM regulation mechanism of TBs compared with grain boundaries (GBs), which provides a new insight for the rational design of metal predominated EMA materials.

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Enhanced microwave absorption properties of biomass-derived carbon decorated with transition metal alloy at improved graphitization degree

Cited by 71 publications

References 45 publications

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

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

Recent advance in three-dimensional porous carbon materials for electromagnetic wave absorption

Exploration of Twin‐Modified Grain Boundary Engineering in Metallic Copper Predominated Electromagnetic Wave Absorber

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