High-Efficiency Electromagnetic Wave Absorption of Cobalt-Decorated NH2-UIO-66-Derived Porous ZrO2/C

2019 ◽  
Vol 11 (39) ◽  
pp. 35959-35968 ◽  
Author(s):  
Xue Zhang ◽  
Jing Qiao ◽  
Jinbo Zhao ◽  
Dongmei Xu ◽  
Fenglong Wang ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
High Efficiency ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption

Facile synthesis of 3D Ni@C nanocomposites derived from two kinds of petal-like Ni-based MOFs towards lightweight and efficient microwave absorbers

Nanoscale ◽  
2021 ◽  
Author(s):  
Pengshu Yi ◽  
Zhengjun Yao ◽  
Jintang Zhou ◽  
Bo Wei ◽  
Ruiyang Tan ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Microwave Absorption ◽  
High Efficiency ◽  
Facile Synthesis ◽  
Microwave Absorbers ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption

The development of lightweight and high-efficiency microwave absorption materials has attracted wide attention in the field of electromagnetic wave absorption. Herein, two kinds of petal-like Ni-based MOFs were grown on...

scholarly journals Identification of the Intrinsic Dielectric Properties of Metal Single Atoms for Electromagnetic Wave Absorption

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Xinci Zhang ◽  
Yanan Shi ◽  
Jia Xu ◽  
Qiuyun Ouyang ◽  
Xiao Zhang ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Dielectric Loss ◽  
Rational Design ◽  
High Efficiency ◽  
Theoretical Calculations ◽  
Atomic Level ◽  
Carbon Supports ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Single Atoms

AbstractAtomically dispersed metals on N-doped carbon supports (M–NxCs) have great potential applications in various fields. However, a precise understanding of the definitive relationship between the configuration of metal single atoms and the dielectric loss properties of M–NxCs at the atomic-level is still lacking. Herein, we report a general approach to synthesize a series of three-dimensional (3D) honeycomb-like M–NxC (M = Mn, Fe, Co, Cu, or Ni) containing metal single atoms. Experimental results indicate that 3D M–NxCs exhibit a greatly enhanced dielectric loss compared with that of the NC matrix. Theoretical calculations demonstrate that the density of states of the d orbitals near the Fermi level is significantly increased and additional electrical dipoles are induced due to the destruction of the symmetry of the local microstructure, which enhances conductive loss and dipolar polarization loss of 3D M–NxCs, respectively. Consequently, these 3D M–NxCs exhibit excellent electromagnetic wave absorption properties, outperforming the most commonly reported absorbers. This study systematically explains the mechanism of dielectric loss at the atomic level for the first time and is of significance to the rational design of high-efficiency electromagnetic wave absorbing materials containing metal single atoms.

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