Multi-shell hollow porous carbon nanoparticles with excellent microwave absorption properties

Tao, Jiaqi; Zhou, Jintang; Yao, Zhengjun; Jiao, Zibao; Wei, Bo; Tan, Ruiyang; Zhong, Li

doi:10.1016/j.carbon.2020.10.062

Cited by 435 publications

(106 citation statements)

References 78 publications

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“…The diffraction peaks of all samples match with the standard patterns (JCPDS PDF#:41-0980) for NbS 2 , and the peaks at 14.8°, 31.0°, 55.3°, and 64.7° can be assigned to (002), (100), (110), and (200) planes of the hexagonal crystal structure of NbS 2 with space group P63/mmc. [22,46] Moreover, it is also found in the XRD patterns that the higher the reaction temperature, the better the crystallinity of NbS 2 nanomaterials prepared within certain temperature range.…”

Section: Characterizationmentioning

confidence: 97%

“…On the other hand, it has been proved that the designs of multilayer or porous structures are extremely useful in the development of EMW absorption materials, which could achieve enhanced absorption performance by providing sufficient multiple reflection and absorption pathways for EMW in the materials [38][39][40] with some typical structures such as yolk-shells, [41][42][43] core-shells, [44,45] and hollow structures. [46,47] Thus, a rational microstructure design of EMW absorbers containing multiple yolk-shell structures or multi-shell hollow porous nanostructures with a large specific surface area could facilitate the dielectric loss and impedance matching. [48,49] In particular, the construction of hollow nanospheres stacked with the nanosheets is favorable for the improvement of EMW absorption performance.…”

Section: Introductionmentioning

confidence: 99%

“…[48,49] In particular, the construction of hollow nanospheres stacked with the nanosheets is favorable for the improvement of EMW absorption performance. [46] Unfortunately, the complexity of the afore-mentioned preparation processes has led to the lack of systematic research into the EMW absorption of the EMW absorbers containing those typical structures.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Initiating VB‐Group Laminated NbS₂ Electromagnetic Wave Absorber toward Superior Absorption Bandwidth as Large as 6.48 GHz through Phase Engineering Modulation

Zhang

Cheng

Wang

et al. 2021

Adv Funct Materials

203

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VB-Group transition metal disulfides (TMDs) are considered excellent materials for electromagnetic wave (EMW) absorption because of their good conductivity and abundant active sites located at their edges and substrates, as compared with VIB-Group TMDs. Herein, for the first time, EMW absorbers based on VB-Group NbS 2 nanosheets by using a facile one-step solvothermal method are successfully prepared. The minimum reflection loss (RL min ) can reach up to 43.85 dB with an effective absorption bandwidth of 6.48 GHz (11.52-18.00 GHz). The remarkable EMW absorption performance can also be reflected in the tunable frequency bands (C-, X-, and Ku-bands), which is achieved by adjusting the contents of materials. Further more, the influence of the content of 2H-phase and 1T-phase in NbS 2 on the EMW absorption performance is systematically investigated. The hierarchical hollow-sphere structure of NbS 2 promotes dielectric loss and the multiple reflection and absorption of EMW, and enhances the impedance matching and synergistic attenuation ability. This work demonstrates that the bottleneck of effective absorbing frequency band of single-component dielectric EMW absorbing materials could be broken through, and paves a novel path towards developing broadband absorbing materials in EMW absorption.

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Section: Characterizationmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Initiating VB‐Group Laminated NbS₂ Electromagnetic Wave Absorber toward Superior Absorption Bandwidth as Large as 6.48 GHz through Phase Engineering Modulation

Zhang

Cheng

Wang

et al. 2021

Adv Funct Materials

203

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“…Each scattering or reflection can bring energy loss to a certain degree, and the change in transmission behavior is equivalent to extending the transmission distance of incident EM wave in microwave absorbers, thus making considerable contribution to the conversion of EM energy [ 48 ]. Meanwhile, the manipulation on shape/morphology and microstructure is also favorable to creating more heterogeneous interfaces, which is necessary to generate powerful interfacial polarization [ 49 ]. Although there is still no clear structure–activity relationship between EM absorption performance and shape/morphology/microstructure, their positive effects have been witnessed in many published papers [ 47 , 50 ], and thus, it is easy to conclude that a reasonable design on morphology/shape and microstructure of nano-scale composites is an effective strategy to develop high-performance microwave absorbers.…”

Section: Em Absorption Mechanism Performance Evaluation and Influence Factorsmentioning

confidence: 99%

Composition Optimization and Microstructure Design in MOFs-Derived Magnetic Carbon-Based Microwave Absorbers: A Review

et al. 2021

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Magnetic carbon-based composites are the most attractive candidates for electromagnetic (EM) absorption because they can terminate the propagation of surplus EM waves in space by interacting with both electric and magnetic branches. Metal-organic frameworks (MOFs) have demonstrated their great potential as sacrificing precursors of magnetic metals/carbon composites, because they provide a good platform to achieve high dispersion of magnetic nanoparticles in carbon matrix. Nevertheless, the chemical composition and microstructure of these composites are always highly dependent on their precursors and cannot promise an optimal EM state favorable for EM absorption, which more or less discount the superiority of MOFs-derived strategy. It is hence of great importance to develop some accompanied methods that can regulate EM properties of MOFs-derived magnetic carbon-based composites effectively. This review comprehensively introduces recent advancements on EM absorption enhancement in MOFs-derived magnetic carbon-based composites and some available strategies therein. In addition, some challenges and prospects are also proposed to indicate the pending issues on performance breakthrough and mechanism exploration in the related field.

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“…And with the load of Ti 3 C 2 T x rising, the impedance matching ratios of composites declines indicating a poor impedance matching is due to mismatching between the permittivity and permeability caused by addition of Ti 3 C 2 T x . Microwave attenuation capability of material can be expressed by attenuation constant α, which described in Equation ( 3): [35,36] 2…”

Section: Electromagnetic Properties At Elevated Temperaturementioning

confidence: 99%

Ultrathin Self‐Assembly MXene@flake Carbonyl Iron Composites with Efficient Microwave Absorption at Elevated Temperatures

Yao

Feng

Yao

et al. 2021

Adv Elect Materials

Self Cite

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waves produced by electronic devices, speed up information transmission while creating a lot of pollution, providing more and more harm to human beings. Thus, the investigation on lightweight and high efficiency EM absorbing materials and devices is widely developed. However, with the emergence of new application, such as 5G electronic devices, EM absorption materials are expected to show stable and efficient performance in thermal environments. There are rarely reports about EM absorbers to meet harsh requirement of thermal environments. The investigation of highly efficient, lightweight EM absorption materials at elevated temperature is still a great challenge.Recently, 2D materials apply to EM absorbers have attracted much attention. For example, graphene have been widely applied in EM absorbing materials due to high specific surface area, light weight, and excellent polarization loss, which enhance polarization to attenuate EM waves. [1] In addition, a class of metal carbide and metal nitride materials (MXene) as a new candidate in 2D materials has been extensively used in fields of EM absorbing and electromagnetic interference (EMI) shielding due to its excellent metal-like conductivity, abundant active surface functional groups, and good machine performance. [2][3][4][5] Ti 3 C 2 T x (T x represents OH, O, or F), a typical MXene material, can be used as a potential EMI material based on high conductivity, which has EMI effectiveness of 92 dB at 45 µm. [3] The metal-like conductivity of Ti 3 C 2 T x causes interface impedance mismatch resulting in poor EM absorbing performance, though there is part of the EM wave attenuation due to polarization and conductivity loss. It is considered that combination of dielectric and magnetic loss materials for high-efficiency EM wave absorbers as an effective strategy, which not only contributes to interface impedance matching of the material and EM waves, but also broadens the EM waves absorption mechanism. [6,7] Magnetic material-carbonyl iron powder, compared with ferrites and ferroalloys such as Fe 3 O 4 , [8] FeCo, [9] has the advantage of strong magnetic loss in the gigahertz frequency band, high Curie temperature, and low cost. [10] In addition, the flake carbonyl iron (FCI) possesses high anisotropy and its magnetic permeability is further enhanced. [11] It has been proven to exhibit the potential to be broadband andThe exploration for the potential lightweight and high efficiency microwave absorbers with thermal stability is a great challenge for researchers. More importantly, the electromagnetic parameters of absorbers at elevated temperatures are seldom studied. In this work, sandwich MXene-Ti 3 C 2 T x @flake carbonyl iron (MF) composites with tunable and efficient microwave absorption at elevated temperatures are successfully fabricated by an electrostatic selfassembly method. Both the complex permittivity and permeability of the MF are strongly temperature dependent in the temperature range of 298-473 K and X band (8.2-12.4 GHz). The efficient microwave ab...

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Multi-shell hollow porous carbon nanoparticles with excellent microwave absorption properties

Cited by 435 publications

References 78 publications

Initiating VB‐Group Laminated NbS₂ Electromagnetic Wave Absorber toward Superior Absorption Bandwidth as Large as 6.48 GHz through Phase Engineering Modulation

Initiating VB‐Group Laminated NbS₂ Electromagnetic Wave Absorber toward Superior Absorption Bandwidth as Large as 6.48 GHz through Phase Engineering Modulation

Composition Optimization and Microstructure Design in MOFs-Derived Magnetic Carbon-Based Microwave Absorbers: A Review

Ultrathin Self‐Assembly MXene@flake Carbonyl Iron Composites with Efficient Microwave Absorption at Elevated Temperatures

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Multi-shell hollow porous carbon nanoparticles with excellent microwave absorption properties

Cited by 435 publications

References 78 publications

Initiating VB‐Group Laminated NbS2 Electromagnetic Wave Absorber toward Superior Absorption Bandwidth as Large as 6.48 GHz through Phase Engineering Modulation

Initiating VB‐Group Laminated NbS2 Electromagnetic Wave Absorber toward Superior Absorption Bandwidth as Large as 6.48 GHz through Phase Engineering Modulation

Composition Optimization and Microstructure Design in MOFs-Derived Magnetic Carbon-Based Microwave Absorbers: A Review

Ultrathin Self‐Assembly MXene@flake Carbonyl Iron Composites with Efficient Microwave Absorption at Elevated Temperatures

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Initiating VB‐Group Laminated NbS₂ Electromagnetic Wave Absorber toward Superior Absorption Bandwidth as Large as 6.48 GHz through Phase Engineering Modulation

Initiating VB‐Group Laminated NbS₂ Electromagnetic Wave Absorber toward Superior Absorption Bandwidth as Large as 6.48 GHz through Phase Engineering Modulation