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Updated: Oct 3, 2025
Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle
Published on: September 22, 2015
Controlled fabrication of core-shell γ-Fe2O3@C-Reduced graphene oxide composites with tunable interfacial structure
Xin Kou1, Yongpeng Zhao2, Lijia Xu2
1College of Mechanical and Electrical Engineering, Sichuan Agricultural University, Ya'an 625000, China; School of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
Abstract:
The design of a high-performance microwave absorbing material is highly dependent on the synergistic structural design of heterostructure and the appropriate material compositions. Herein, a series of composites of reduced graphene oxide (RGO) and core-shell structured γ-Fe2O3@C nanoparticles have been achieved by a hydrothermal and in-situ chemical vapor deposition (CVD) method. In particular, the structure of the carbon layer, including its graphitization and thickness, can be controlled by optimizing the CVD conditions, which is beneficial to tailor the impedance matching and dielectric loss. The rationally designed RGO/γ-Fe2O3@C composite has multiple electromagnetic dissipation mechanisms. The effective absorption ranges of an optimal sample at a filling rate of 20% can cover 100% X-band and 98% Ku-band at thicknesses of 3.0 mm and 2.2 mm, respectively. This finding suggested that the controllable fabrication of core-shell heterostructures could be viable approach to upgrade the microwave absorption performance of transition metal oxides.
