NiCo2S4 nanosheets on 3D wood-derived carbon for microwave absorption

Dong, Shun; Hu, Peitao; Li, Xiutao; Hong, Changqing; Zhang, Xinghong; Han, Jiecai

doi:10.1016/j.cej.2020.125588

Cited by 171 publications

(48 citation statements)

References 47 publications

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“…Qiu and his co-workers successfully prepared walnut shell-derived porous carbon microwave absorbing materials with a strong intensity of -42.4 dB at the matching thickness of 2 mm [ 20 ]. Interestingly, Dong et al synthesized wood-based microwaving absorbers with the optimum absorption frequency range of 5.26 GHz [ 21 ]. Besides, our group also carried out deepgoing study about biomass-based microwave absorbing materials like wheat flour [ 22 ] and cotton [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Environmentally Friendly and Multifunctional Shaddock Peel-Based Carbon Aerogel for Thermal-Insulation and Microwave Absorption

Sheng²,

et al. 2021

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Highlights The eco-friendly shaddock peel-derived carbon aerogels were prepared by a freeze-drying method. Multiple functions such as thermal insulation, compression resistance and microwave absorption can be integrated into one material-carbon aerogel. Novel computer simulation technology strategy was selected to simulate significant radar cross-sectional reduction values under real far field condition. . Abstract Eco-friendly electromagnetic wave absorbing materials with excellent thermal infrared stealth property, heat-insulating ability and compression resistance are highly attractive in practical applications. Meeting the aforesaid requirements simultaneously is a formidable challenge. Herein, ultra-light carbon aerogels were fabricated via fresh shaddock peel by facile freeze-drying method and calcination process, forming porous network architecture. With the heating platform temperature of 70 °C, the upper surface temperatures of the as-prepared carbon aerogel present a slow upward trend. The color of the sample surface in thermal infrared images is similar to that of the surroundings. With the maximum compressive stress of 2.435 kPa, the carbon aerogels can provide favorable endurance. The shaddock peel-based carbon aerogels possess the minimum reflection loss value (RLmin) of − 29.50 dB in X band. Meanwhile, the effective absorption bandwidth covers 5.80 GHz at a relatively thin thickness of only 1.7 mm. With the detection theta of 0°, the maximum radar cross-sectional (RCS) reduction values of 16.28 dB m2 can be achieved. Theoretical simulations of RCS have aroused extensive interest owing to their ingenious design and time-saving feature. This work paves the way for preparing multi-functional microwave absorbers derived from biomass raw materials under the guidance of RCS simulations.

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Section: Introductionmentioning

confidence: 99%

Environmentally Friendly and Multifunctional Shaddock Peel-Based Carbon Aerogel for Thermal-Insulation and Microwave Absorption

Sheng²,

et al. 2021

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“…In general, the real permeability ( μ ’) signifies the energy storage capacity of magnetic energy and the imaginary permeability ( μ ″) refers to the energy dissipation capacity of magnetic energy [ 52 ]. Figure 14 a depicts the frequency dependence variation of the real part of permeability ( µ ’) of designed nanocomposites.…”

Section: Resultsmentioning

confidence: 99%

Excellent, Lightweight and Flexible Electromagnetic Interference Shielding Nanocomposites Based on Polypropylene with MnFe2O4 Spinel Ferrite Nanoparticles and Reduced Graphene Oxide

et al. 2020

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In this work, various tunable sized spinel ferrite MnFe2O4 nanoparticles (namely MF20, MF40, MF60 and MF80) with reduced graphene oxide (RGO) were embedded in a polypropylene (PP) matrix. The particle size and structural feature of magnetic filler MnFe2O4 nanoparticles were controlled by sonochemical synthesis time 20 min, 40 min, 60 min and 80 min. As a result, the electromagnetic interference shielding characteristics of developed nanocomposites MF20-RGO-PP, MF40-RGO-PP, MF60-RGO-PP and MF80-RGO-PP were also controlled by tuning of magnetic/dielectric loss. The maximum value of total shielding effectiveness (SET) was 71.3 dB for the MF80-RGO-PP nanocomposite sample with a thickness of 0.5 mm in the frequency range (8.2–12.4 GHz). This lightweight, flexible and thin nanocomposite sheet based on the appropriate size of MnFe2O4 nanoparticles with reduced graphene oxide demonstrates a high-performance advanced nanocomposite for cutting-edge electromagnetic interference shielding application.

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“…The delta-function is another method to evaluate the EM impedance matching degree. The equation is shown as follows [ 63 – 65 ]: The small delta value and close to zero indicate good impedance matching. If |Δ| tends to far away from zero, it gives poor microwave absorption.…”

Section: Theories Of Microwave Absorptionmentioning

confidence: 99%

“…The delta-function is another method to evaluate the EM impedance matching degree. The equation is shown as follows [63][64][65]:…”

mentioning

confidence: 99%

A Review on Metal–Organic Framework-Derived Porous Carbon-Based Novel Microwave Absorption Materials

et al. 2021

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The development of microwave absorption materials (MAMs) is a considerable important topic because our living space is crowed with electromagnetic wave which threatens human’s health. And MAMs are also used in radar stealth for protecting the weapons from being detected. Many nanomaterials were studied as MAMs, but not all of them have the satisfactory performance. Recently, metal–organic frameworks (MOFs) have attracted tremendous attention owing to their tunable chemical structures, diverse properties, large specific surface area and uniform pore distribution. MOF can transform to porous carbon (PC) which is decorated with metal species at appropriate pyrolysis temperature. However, the loss mechanism of pure MOF-derived PC is often relatively simple. In order to further improve the MA performance, the MOFs coupled with other loss materials are a widely studied method. In this review, we summarize the theories of MA, the progress of different MOF-derived PC‑based MAMs, tunable chemical structures incorporated with dielectric loss or magnetic loss materials. The different MA performance and mechanisms are discussed in detail. Finally, the shortcomings, challenges and perspectives of MOF-derived PC‑based MAMs are also presented. We hope this review could provide a new insight to design and fabricate MOF-derived PC-based MAMs with better fundamental understanding and practical application.

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NiCo2S4 nanosheets on 3D wood-derived carbon for microwave absorption

Cited by 171 publications

References 47 publications

Environmentally Friendly and Multifunctional Shaddock Peel-Based Carbon Aerogel for Thermal-Insulation and Microwave Absorption

Environmentally Friendly and Multifunctional Shaddock Peel-Based Carbon Aerogel for Thermal-Insulation and Microwave Absorption

Excellent, Lightweight and Flexible Electromagnetic Interference Shielding Nanocomposites Based on Polypropylene with MnFe2O4 Spinel Ferrite Nanoparticles and Reduced Graphene Oxide

A Review on Metal–Organic Framework-Derived Porous Carbon-Based Novel Microwave Absorption Materials

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