γ-ray irradiation effects on graphene oxide in an ethylenediamine aqueous solution

• Graphene oxide is irradiated by γ-ray in an ethylenediamine/water blend solution.
• Reduction and modification effects on graphene oxide by irradiation are confirmed.
• Ethylenediamine are attached onto RMGO sheets due to the recombination of radicals.

Graphene oxide (GO) was dispersed in an ethylenediamine (EDA) aqueous solution and then irradiated by γ-ray under the protection of nitrogen gas at room temperature. Reduction and modification effects were confirmed. The reduced and modified GO (RMGO) was characterized by ultra-violet visible (UV–vis) spectroscopy, Fourier-transform infrared spectroscopy (FT-IR), X-ray diffract meter (XRD) and thermo gravimetric analysis (TGA).