Progress of Cryogenics and Isotopes Separation


The National Conference with international participation on New Cryogenic and Isotope Technologies for Energy and Environment - EnergEn 2018 is organized by the National Research-Development Institute for Cryogenic and Isotopic Technologies - ICSI Rm. Valcea with the scientific participation of the University of Pitesti and the University of Craiova and will be held at Baile Govora, in 2018.



Facile synthesis of nitrogen-doped graphene via eco-friendly microwave-assisted process

Adriana Marinoiu1*, Iuliana Morjan2, Simona Nica3, Mircea Raceanu1, Felicia Bucura1, Stanica Enache1, Elena Carcadea1

1National Research and Development Institute for Cryogenics and Isotopic Technologies – ICSI Rm. Valcea, 4 Uzinei Street, P.O. Box Râureni 7, 240050, Rm. Valcea, Romania

2 National Institute for Laser, Plasma and Radiation Physics, 409, Atomistilor Street, PO Box MG-36, 077125 Magurele, Bucharest, Romania

3C. D. Nenitzescu” Institute of Organic Chemistry, Romanian Academy, Splaiul

Independentei, no. 202B, Bucharest, Romania



This study has evaluated the synthesis of nitrogen doped graphene via a facile protocol employing the eco-friendly microwave-assisted process (MW). The nitrogen doped graphene was synthesized by MW route utilizing ammonia as nitrogen precursor and ethanol as reduction agent in the presence of graphene oxide (GO). Rapid thermal reduction of NH4+ was achieved as nitrogen-doped graphene under the condition of microwave irradiation (800 W, 15 min). The microstructural properties of prepared samples were examined. Fourier transform infrared (FT-IR) spectroscopy, Raman, Brunauer-Emmett-Teller (BET) surface area analysis, X-ray photoelectron spectroscopy (XPS) surface composition, elemental analysis were performed to characterize the synthesized nitrogen-doped graphene. The nitrogen content of as-prepared nitrogen-doped reduced graphene oxide (N/rGO) was 2.98 wt %. The performed characterization demonstrated that N/rGO has been successfully prepared by using an eco-friendly method, which brought important advantages (facile, simple, quick, inexpensive technique).

Keywords: Nitrogen-doped graphene, microwave, ammonia.


*Corresponding author: Adriana Marinoiu, E-mail: a This e-mail address is being protected from spambots. You need JavaScript enabled to view it ,