Electrostatic self-assembled two-dimensional magnetized MXene/hollow Fe3O4 nanoparticle hybrids with high electromagnetic absorption performance and improved impendence matching

2020 ◽  
Author(s):  
Baiwen Deng ◽  
Zhicheng Liu ◽  
Fei Pan ◽  
Zhen Xiang ◽  
Xiang Zhang ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Strong Absorption ◽  
Two Dimensional ◽  
Fe3o4 Nanoparticle ◽  
Electromagnetic Absorption ◽  
Absorption Performance ◽  
Self Assembled ◽  
Electromagnetic Pollution

Electromagnetic pollution often interferes with the normal use of sophisticated electric devices leading to the urge of developing Electromagnetic wave absorbers with lightweight and strong absorption ability. Herein, we synthesized...

scholarly journals Sandwich-Like Fe&TiO2@C Nanocomposites Derived from MXene/Fe-MOFs Hybrids for Electromagnetic Absorption

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Baiwen Deng ◽  
Zhen Xiang ◽  
Juan Xiong ◽  
Zhicheng Liu ◽  
Lunzhou Yu ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Impedance Matching ◽  
Two Dimensional ◽  
Carbon Nanosheets ◽  
Good Design ◽  
Absorption Bandwidth ◽  
Functional Nanoparticles ◽  
Electromagnetic Absorption ◽  
Electromagnetic Pollution ◽  
Minimum Reflection Loss

AbstractElectromagnetic pollution has been causing a series of problems in people’s life, and electromagnetic absorbers with lightweight and broad absorbing bandwidth properties are widely desired. In this work, novel sandwich-like 2D laminated Fe&TiO2 nanoparticles@C nanocomposites were rationally designed and successfully developed from the MXene–MOFs hybrids. The formation of Fe and rutile-TiO2 nanoparticles sandwiched by the two-dimensional carbon nanosheets provided strong electromagnetic energy attenuation and good impedance matching for electromagnetic wave (EMW) absorption. As expected, the nanocomposites achieved a broad effective absorption bandwidth of 6.5 GHz at a thickness of only 1.6 mm and the minimum reflection loss (RL) value of − 51.8 dB at 6.6 GHz with a thickness of 3 mm. This work not only provides a good design and fabricating concept for the laminated metal and functional nanoparticles@C nanocomposites with good EMW absorption, but also offers an important guideline to fabricate various two-dimensional nanocomposites derived from the MXene precursors.

Two-dimensional copper(i) thiophenolates: a well-constructed conductive Cu–S network for excellent electromagnetic wave absorption

2019 ◽  
Vol 7 (37) ◽  
pp. 11621-11631 ◽  
Author(s):  
Lipeng Wu ◽  
Yingzhi Jiao ◽  
Kun Zhang ◽  
Fan Wu ◽  
Wei Zhao ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Coordination Polymers ◽  
High Performance ◽  
Two Dimensional ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Electromagnetic Absorption

High-performance electromagnetic absorption (EMA) based on conductive coordination polymers seems interesting but still remains unexplored to date.

A self-assembly method for the fabrication of a three-dimensional (3D) polypyrrole (PPy)/poly(3,4-ethylenedioxythiophene) (PEDOT) hybrid composite with excellent absorption performance against electromagnetic pollution

2016 ◽  
Vol 4 (1) ◽  
pp. 82-88 ◽  
Author(s):  
Fan Wu ◽  
Mengxiao Sun ◽  
Wanchun Jiang ◽  
Kun Zhang ◽  
Aming Xie ◽  
...  
Keyword(s):  
Self Assembly ◽  
Hybrid Composite ◽  
Three Dimensional ◽  
Synthesis And Characterization ◽  
Assembly Method ◽  
Electromagnetic Absorption ◽  
Absorption Performance ◽  
Electromagnetic Pollution

Here we report the synthesis and characterization of a 3D-PPy/PEDOT composite, and examine its electromagnetic absorption (AE) performance.

Growing 3D ZnO nano-crystals on 1D SiC nanowires: enhancement of dielectric properties and excellent electromagnetic absorption performance

2016 ◽  
Vol 4 (38) ◽  
pp. 8897-8902 ◽  
Author(s):  
Mengxiao Sun ◽  
Xuliang Lv ◽  
Aming Xie ◽  
Wanchun Jiang ◽  
Fan Wu
Keyword(s):  
Quality Of Life ◽  
Dielectric Properties ◽  
Sic Nanowires ◽  
Electromagnetic Absorption ◽  
Pollution Management ◽  
Absorption Performance ◽  
Electromagnetic Pollution ◽  
Relationship Of ◽  
The Relationship

Nowadays, only by balancing the relationship of electromagnetic applications and electromagnetic pollution management can human health and quality of life be guaranteed.

Hollow cube-like CuS derived from Cu2O crystals for the highly efficient elimination of electromagnetic pollution

2018 ◽  
Vol 42 (9) ◽  
pp. 6735-6741 ◽  
Author(s):  
Xiaodong Sun ◽  
Xin Yuan ◽  
Xiaopeng Li ◽  
Ling Li ◽  
Qingfeng Song ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Highly Efficient ◽  
One Step ◽  
Absorption Performance ◽  
Hollow Cube ◽  
Electromagnetic Pollution ◽  
Efficient Elimination

In this study, hollow cube-like CuS was fabricated via a one-step reaction to investigate high electromagnetic wave absorption performance.

scholarly journals NiS2@rGO Nanosheet Wrapped with PPy Aerogel: A Sandwich-Like Structured Composite for Excellent Microwave Absorption

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 833 ◽  
Author(s):  
Zhi Zhang ◽  
Qi Lv ◽  
Yiwang Chen ◽  
Haitao Yu ◽  
Hui Liu ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
In Situ Polymerization ◽  
Impedance Matching ◽  
Interfacial Polarization ◽  
The Novel ◽  
Step Method ◽  
Absorption Bands ◽  
Absorption Performance ◽  
Electromagnetic Pollution

To reduce electromagnetic pollution as well as increase the accuracy of high-precision electronic equipment, more attention has been paid to new electromagnetic wave (EMW) absorbing materials, which have the advantages of strong absorption, wide absorption bands, and a narrow thickness. In this study, a novel ternary type of the NiS2@rGO/polypyrrole (PPy) sandwich-like structured composites was synthesized via a facile two-step method, in which the hydrothermal method was used to prepare NiS2@rGO binary composites and then the in situ polymerization method was used to synthesize the PPy, which acted as the outer layer of the sandwich-like structure. The morphologies and electromagnetic absorption performance of the NiS2@rGO/PPy were measured and investigated. A sample with 6 wt% NiS2@rGO/PPy loading paraffin-composite obtained an outstanding reflection loss (RL) of −58.7 dB at 16.44 GHz under a thickness of 2.03 mm. Simultaneously, the effective electromagnetic wave absorption bandwidth for RL < −10 dB, which covered 7.04 to 18.00 GHz (10.96 GHz), was achieved by changing the thickness of the absorber from 2.0 to 3.5 mm. The results not only suggest that the NiS2@rGO/PPy composite has excellent performance in the field of EMW absorption but also prove that the novel sandwich-like structure can contribute to appropriate impedance matching through multiple relaxation and interfacial polarization processes.

scholarly journals Microwave-Boosted One-Step Synthesis of Nanocrystal N-Doped 2D Carbon/Ni Composite with High Electromagnetic Absorption Performance

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1718
Author(s):  
Pan Luo ◽  
Song Lyu ◽  
Bowen Zhang ◽  
Hui Wang ◽  
Yanping Zhou ◽  
...  
Keyword(s):  
Absorption Capacity ◽  
Sample Thickness ◽  
Relaxation Processes ◽  
Mixed Solution ◽  
Absorption Bandwidth ◽  
Electromagnetic Absorption ◽  
One Step ◽  
Absorption Performance ◽  
Electromagnetic Pollution ◽  
High Absorption

As the problems of electromagnetic pollution and interference are becoming increasingly serious, the development of electromagnetic absorption materials with a high absorption capacity and broad absorption bandwidth are stringently needed. In this work, an N-doped 2D carbon/Ni complex is synthesized through direct microwave irradiation on a mixed solution of nickel nitrate, urea, and agarose under N2. The electromagnetic absorption performance can be tuned by controlling the Ni content. Specifically, minimum reflection loss values (RLmin) of −65.5 dB at 15.8 GHz with an effective absorption bandwidth (EAB) of 4.2 GHz at a sample thickness of 1.47 mm, and −55.4 dB at 11.8 GHz with an EAB of 3 GHz at a sample thickness of 1.92 mm can be obtained. The outstanding performance of electromagnetic absorption is attributed to the multiple polarization relaxation processes and the synergistic effect between 2D carbon sheets and Ni particles.

Polyimide-based graphene composite foams with hierarchical impedance gradient for efficient electromagnetic absorption

2021 ◽  
Author(s):  
Lei Pu ◽  
Shuangshuang Li ◽  
Yawei Zhang ◽  
Haiyan Zhu ◽  
Wei Fan ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
High Performance ◽  
Absorption Capacity ◽  
Strong Absorption ◽  
Composite Foam ◽  
Broad Bandwidth ◽  
Graphene Composite ◽  
Electromagnetic Absorption ◽  
Composite Foams ◽  
Electromagnetic Pollution

The development of high-performance microwave absorption materials with strong absorption capacity and broad bandwidth is highly desirable in the field of electromagnetic pollution protection. Herein, polyimide/graphene composite foam with multi-hierarchical...

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