EMI and microwave absorbing efficiency of polyaniline-functionalized reduced graphene oxide/γ-Fe2O3/epoxy nanocomposite

Soft Matter ◽  
2020 ◽  
Vol 16 (28) ◽  
pp. 6643-6653 ◽  
Author(s):  
Rimpa Jaiswal ◽  
Kavita Agarwal ◽  
Rakesh Kumar ◽  
Ritush Kumar ◽  
Kingsuk Mukhopadhyay ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Microwave Absorption ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Epoxy Nanocomposite ◽  
Reduced Graphene ◽  
Mixing Method ◽  
Microwave Absorbing

Polyaniline-decorated RGPF prepared by the solution mixing method in three different ratios (1 : 3, 1 : 1 and 3 : 1) of polyaniline-decorated reduced graphene oxide and ferrite have been studied for microwave absorption properties in defence application.

Microwave absorption properties of Zn-doped barium ferrite (BaFe12-x Zn x O19) decorated reduced graphene oxide

2021 ◽  
Vol 112 (6) ◽  
pp. 465-473
Author(s):  
Mojtaba Moslehi Niasar ◽  
Mohammad Jafar Molaei ◽  
Alireza Aghaei
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Microwave Absorption ◽  
Barium Ferrite ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Zn Doping ◽  
Reduced Graphene ◽  
Microwave Absorbing

Abstract Reduced graphene oxide has attracted great interest for application as microwave absorbing materials during recent years. Barium ferrite (BaFe12O19) is also a hard magnetic material with microwave absorbing properties. In this research, Zn-doped barium ferrite/reduced graphene oxide nanocomposites were synthesized and their magnetic and microwave absorption properties were studied. Phase analysis, particle morphology, magnetic properties, and microwave absorption properties were investigated by means of X-ray diffraction, field-emission scanning electron microscopy, vibrating sample magnetometry, and vector network analysis, respectively. Electron microscopy images showed that reduced graphene oxide nanosheets are decorated with barium ferrite nanoparticles. Zn-doping in the reduced graphene oxide/BaFe12-x Zn x O19 (x = 0.0, 0.2, 0.4, and 0.6) nanocomposites caused an increase in the saturation magnetization from 30.76 to 32.69 emu g–1 for Zn = 0.4. Maximum reflection loss was increased from –7.39 dB to –13.50 dB by Zn doping for x = 0.4 in the nanocomposite consisting of 10 wt.% of reduced graphene oxide/BaZn0.4Fe11.6O19. The microwave absorption characteristics are discussed based on the permittivity and permeability values of the nanocomposites.

Superior microwave absorption properties of ultralight reduced graphene oxide/black phosphorus aerogel

2018 ◽  
Vol 29 (23) ◽  
pp. 235604 ◽  
Author(s):  
Chunxue Hao ◽  
Bochong Wang ◽  
Fusheng Wen ◽  
Congpu Mu ◽  
Jianyong Xiang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Microwave Absorption ◽  
Black Phosphorus ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Reduced Graphene

Solvothermal Synthesis of Reduced Graphene Oxide/Ferroferric Oxide Hybrid Composites with Enhanced Microwave Absorption Properties

NANO ◽  
2017 ◽  
Vol 12 (12) ◽  
pp. 1750144 ◽  
Author(s):  
Ruiwen Shu ◽  
Meng Wang ◽  
Yingying Yang ◽  
Siyu Chang ◽  
Gengyuan Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Microwave Absorption ◽  
Hybrid Composite ◽  
Hybrid Composites ◽  
Absorption Characteristic ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Ferroferric Oxide ◽  
Reduced Graphene

In this work, reduced graphene oxide (RGO)/ferroferric oxide (RGO/Fe3O4) hybrid composite was successfully fabricated by a facile one-step solvothermal method. The structure, chemical composition, morphology and magnetic properties of the samples were investigated in detail. Fe3O4 microspheres with an average diameter of 250[Formula: see text]nm were uniformly anchored on the surface of the RGO sheets without large aggregation. Moreover, the results demonstrated that the hybrid composite exhibited obviously enhanced microwave absorption properties compared with the pure Fe3O4 microspheres. The minimum reflection loss (RL) of the hybrid composite reached [Formula: see text]36.8[Formula: see text]dB at 17.2[Formula: see text]GHz with a thickness of 5.0[Formula: see text]mm and its effective absorption bandwidth (lower than [Formula: see text]10[Formula: see text]dB) was 3.9[Formula: see text]GHz with a thickness of 2.5[Formula: see text]mm. Significantly, the hybrid composite exhibited a dual-waveband absorption characteristic covering the C and Ku bands. Besides, the relationship between the matching thickness and peak frequency was reasonably explained according to the quarter-wavelength matching theory. Therefore, the obtained composite was a promising candidate for application in microwave absorption.

Microwave Absorption Properties of CoS2 Nanocrystals Embedded into Reduced Graphene Oxide

2017 ◽  
Vol 9 (34) ◽  
pp. 28868-28875 ◽  
Author(s):  
Can Zhang ◽  
Bochong Wang ◽  
Jianyong Xiang ◽  
Can Su ◽  
Congpu Mu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Microwave Absorption ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Reduced Graphene
Sign in / Sign up

Export Citation Format

Share Document