Abstract
Abstract
Reduced graphene oxide-ferrite (rGO/Fe3O4) microcomposites as lightweight microwave absorbing materials has been successfully synthesized from petung bamboo and iron sand by mechanical mixing method at different rGO content (0:1, 1:0, 1:1, 1:2, 1:3, 2:1 and 3:1 wt%). Reduced graphene oxide as dielectric material was synthesized from petung bamboo charcoal using carbonization method and ferrite as magnetic material was synthesized from iron sand using extraction-milling method. Structural characterization by x-ray Fluorosence, Fourier Transform Infrared, Vibrating Sample Magnetometry, x-ray Diffraction, Scanning Electron Microscopy proved that micrometer sized reduced graphene oxide ferrite in the microcomposites was responsible for the ferromagnetic behavior of the composites. The reflection loss of microcomposites measured in the microwave frequency range of 8–12 GHz using a Vector Network Analyzer. The results showed that at the micro scale, rGO had a higher absorption power with maximum reflection loss (RL
m
) value of −21.81 dB at matching frequency (f
m
) 10.85 GHz compared with Fe3O4 (RL
m
value of −9.25 dB at f
m
= 10.60 GHz) at thickness of 1 mm. The rGO/Fe3O4 (2:1 wt%) microcomposites microwave absorber shows the optimum absorption with maximum reflection loss value of −16.51 dB at matching frequency (f
m
) 10.74 GHz at thickness of 1 mm. The use of natural materials and the controlled rGO/Fe3O4 microcomposites structure with simple synthesis methods, which the urgent need for developing high performance lightweight microwave abrsorbing materials and are environmentally friendly.
Funder
ITS, Ministry of Education and Culture, Research
Directorate of Research
Subject
Metals and Alloys,Polymers and Plastics,Surfaces, Coatings and Films,Biomaterials,Electronic, Optical and Magnetic Materials
Reference30 articles.
1. Peculiar porous α-Fe2O3, γ-Fe2O3 and Fe3O4 nanospheres: facile synthesis and electromagnetic properties;Wu;Powder Technol.,2015
2. Jute-based porous biomass carbon composited by Fe3O4 nanoparticles as an excellent microwave absorber;Lihong Wang;J. Alloys Compd.,2019
3. Controlling the microstructure of biomass-derived porous carbon to assemble structural absorber for broadening bandwidth;Xiang Fang;Carbon,2022
4. Biomass-derived materials: Promising, affordable, capable, simple, and lightweight microwave absorbing;Reza Peymanfar;Chem. Eng. J.,2022
5. Controlled synthesis of Fe3O4@SnO2/rGO nanocomposite for microwave absorption enhancement;Wang;Ceram. Int.,2016