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Updated: Dec 30, 2025
Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions
Published on: July 3, 2025
Fabrication of Reduced Graphene Oxide (RGO)/Co3 O4 Nanohybrid Particles and a RGO/Co3 O4 /Poly(vinylidene fluoride)
Guang-Sheng Wang1, Yun Wu1, Yun-Zhao Wei1
1Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, Beijing Key Laboratory of Bio-inspired Energy Materials and Devices, School of Chemistry and Environment, Beihang University, Beijing 100191 (P. R. China).
Abstract:
Reduced graphene oxide (RGO)/Co3 O4 nanohybrid particles, composed of reduced graphite oxide and Co3 O4 particles, have been fabricated by an in situ growth method under mild wet-chemical conditions (140 °C). A series of characterization results indicate that the as-prepared Co3 O4 particles with relatively uniform sizes are embedded in RGO layers to form unique core-shell nanostructures. The RGO/Co3 O4 /poly(vinylidene fluoride) composite was found to possess excellent absorption properties. Owing to the effect of the negative permeability, the position of the absorption peaks remains at the same frequency at different thicknesses without shifting to lower frequencies. For the composites with a filler loading of 10 wt %, the maximum peaks can reach -25.05 dB at 11.6 GHz with a thickness of 4.0 mm. These enhanced microwave absorbing properties can be explained based on the structures of the nanohybrid particles.
