Synthesis of CF@PANI hybrid nanocomposites decorated with Fe3O4 nanoparticles towards excellent lightweight microwave absorber

Zhang, Meng; Ling, Hailong; Ding, Shiqi; Xie, Yuxin; Cheng, Tingting; Zhao, Laibin; Wang, Ting; Bian, Huiguang; Lin, Hui; Li, Zhenjiang; Meng, Alan

doi:10.1016/j.carbon.2020.12.005

Cited by 119 publications

(24 citation statements)

References 64 publications

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“…Functional groups are rich in most carbonaceous materials including carbon fibers, carbon nanotubes, biochar, and graphene. [ 97 , 98 , 99 , 100 ] Besides, the emerging MXene materials also possess abundant functional groups and can provide intense dipolar polarization. [ 101 , 102 ] The presence of these functional groups can be detected by deconvolution of high‐resolution XPS spectra of C and infrared spectroscopy.…”

Section: Dielectric Loss Mechanismsmentioning

confidence: 99%

Dielectric Loss Mechanism in Electromagnetic Wave Absorbing Materials

2022

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Electromagnetic (EM) wave absorbing materials play an increasingly important role in modern society for their multi-functional in military stealth and incoming 5G smart era. Dielectric loss EM wave absorbers and underlying loss mechanism investigation are of great significance to unveil EM wave attenuation behaviors of materials and guide novel dielectric loss materials design. However, current researches focus more on materials synthesis rather than in-depth mechanism study. Herein, comprehensive views toward dielectric loss mechanisms including interfacial polarization, dipolar polarization, conductive loss, and defect-induced polarization are provided. Particularly, some misunderstandings and ambiguous concepts for each mechanism are highlighted. Besides, in-depth dielectric loss study and novel dielectric loss mechanisms are emphasized. Moreover, new dielectric loss mechanism regulation strategies instead of regular components compositing are summarized to provide inspiring thoughts toward simple and effective EM wave attenuation behavior modulation.

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Section: Dielectric Loss Mechanismsmentioning

confidence: 99%

Dielectric Loss Mechanism in Electromagnetic Wave Absorbing Materials

2022

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“…Such carbon-encapsulated magnetite nanomaterials have the potential for diverse applications in various fields. They can be used as drug carriers in targeted drug delivery therapeutic systems [ 57 , 58 ], anodes materials in the construction of electrochemical lithium-ion batteries [ 59 ], microwave absorbing material for the treatment of microwave radiation pollution [ 60 , 61 , 62 , 63 ], and coolants for heat transfer applications in various systems (e.g., automobile radiators, refrigerators, electronic devices, solar energy heaters, etc.) [ 56 ].…”

Section: Resultsmentioning

confidence: 99%

Comparison of the Surface Properties of Hydrothermally Synthesised Fe3O4@C Nanocomposites at Variable Reaction Times

Sani

Adnan

et al. 2021

Nanomaterials

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The influence of variable reaction time (tr) on surface/textural properties (surface area, total pore volume, and pore diameter) of carbon-encapsulated magnetite (Fe3O4@C) nanocomposites fabricated by a hydrothermal process at 190 °C for 3, 4, and 5 h was studied. The properties were calculated using the Brunauer–Emmett–Teller (BET) isotherms data. The nanocomposites were characterised using Fourier transform infrared spectroscopy, X-ray diffraction analysis, thermogravimetry, and scanning and transmission electron microscopies. Analysis of variance shows tr has the largest effect on pore volume (F value = 1117.6, p value < 0.0001), followed by the surface area (F value = 54.8, p value < 0.0001) and pore diameter (F value = 10.4, p value < 0.001) with R2-adjusted values of 99.5%, 88.5% and 63.1%, respectively. Tukey and Fisher tests confirmed tr rise to have caused increased variations in mean particle sizes (11–91 nm), crystallite sizes (5–21 nm), pore diameters (9–16 nm), pore volume (0.017–0.089 cm3 g−1) and surface area (7.6–22.4 m2 g−1) of the nanocomposites with individual and simultaneous confidence limits of 97.9 and 84.4 (p-adj < 0.05). The nanocomposites’ retained Fe–O vibrations at octahedral (436 cm−1) and tetrahedral (570 cm−1) cubic ferrite sites, modest thermal stability (37–60% weight loss), and large volume-specific surface area with potential for catalytic application in advanced oxidation processes.

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“…7a-f. It can be seen that GCA-M 0.2 -10 has good impedance matching performance in almost the entire frequency range, which is derived from appropriate conductive loss and corresponding magnetic loss [78][79][80][81].…”

Section: Electromagnetic Parameters Of As-obtained Aerogelsmentioning

confidence: 99%

Structural Engineering of Hierarchical Aerogels Comprised of Multi-dimensional Gradient Carbon Nanoarchitectures for Highly Efficient Microwave Absorption

et al. 2021

Self Cite

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Recently, multilevel structural carbon aerogels are deemed as attractive candidates for microwave absorbing materials. Nevertheless, excessive stack and agglomeration for low-dimension carbon nanomaterials inducing impedance mismatch are significant challenges. Herein, the delicate “3D helix–2D sheet–1D fiber–0D dot” hierarchical aerogels have been successfully synthesized, for the first time, by sequential processes of hydrothermal self-assembly and in-situ chemical vapor deposition method. Particularly, the graphene sheets are uniformly intercalated by 3D helical carbon nanocoils, which give a feasible solution to the mentioned problem and endows the as-obtained aerogel with abundant porous structures and better dielectric properties. Moreover, by adjusting the content of 0D core–shell structured particles and the parameters for growth of the 1D carbon nanofibers, tunable electromagnetic properties and excellent impedance matching are achieved, which plays a vital role in the microwave absorption performance. As expected, the optimized aerogels harvest excellent performance, including broad effective bandwidth and strong reflection loss at low filling ratio and thin thickness. This work gives valuable guidance and inspiration for the design of hierarchical materials comprised of dimensional gradient structures, which holds great application potential for electromagnetic wave attenuation. "Image missing"

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Synthesis of CF@PANI hybrid nanocomposites decorated with Fe3O4 nanoparticles towards excellent lightweight microwave absorber

Cited by 119 publications

References 64 publications

Dielectric Loss Mechanism in Electromagnetic Wave Absorbing Materials

Dielectric Loss Mechanism in Electromagnetic Wave Absorbing Materials

Comparison of the Surface Properties of Hydrothermally Synthesised Fe3O4@C Nanocomposites at Variable Reaction Times

Structural Engineering of Hierarchical Aerogels Comprised of Multi-dimensional Gradient Carbon Nanoarchitectures for Highly Efficient Microwave Absorption

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