Progress of Cryogenics and Isotopes Separation , ISSN: 1582-2575
2019, Volume 22, Issue 2
Pages 21-30

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

Adriana Marinoiu 1* , Iuliana Morjan 2 , Simona Nica 3 , Mircea Raceanu 1 , Felicia Bucura 1 , Stanica Enache 1 , Elena Carcadea 1

1 National Research and Development Institute for Cryogenics and Isotopic Technologies - ICSI Rm. Valcea, Uzinei Street no. 4, PO Box Râureni 7, 240050, Râmnicu Vâlcea, Romania
2 National Institute for Laser, Plasma and Radiation Physics, 409, Atomistilor Street, PO Box MG-36, 077125 Magurele, Bucharest, Romania
3 “C. D. Nenitzescu” Institute of Organic Chemistry, Romanian Academy, Splaiul Independentei, no. 202 B, Bucharest, Romania

*Corresponding author: Adriana Marinoiu, E-mail:,

Received 17 September 2019
Received in revised form 10 October 2019
Accepted 20 October 2019
Available online 20 November 2019


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).


  • Ai, S., Chen, Y., Liu, Y., Zhang, Q., Xiong, L., Huang, H., Li, L., Yu, X., & Wei, L. (2018)
    Facile synthesis of nitrogen-doped graphene aerogels for electrochemical detection of dopamine
    Solid State Sciences, 86, 6-11.
  • Candu, N., Man, I., Simion, A., Cojocaru, B., Coman, S. M., Bucur, C., Primo, A., Garcia, H., & Parvulescu, V. I. (2019)
    Nitrogen-doped graphene as metal free basic catalyst for coupling reactions
    Journal of Catalysis, 376, 238-247.

  • Kaya, Y., (2013)
    Bifunctional activation and heterolytic cleavage of ammonia and dihydrogen by silicasupported tantalum imido amido complexes and relevance to the dinitrogen cleavage mechanism by tantalum hydrides. (Doctoral dissertation) Organic chemistry
    Université Claude Bernard - Lyon I,. English. (NNT: 2013LYO10054). (tel-01177064).

  • Krishna, R., Fernandes, D. M., Marinoiu, A., Ventura, J., Freire, C., & Titus, E. (2017)
    Facile synthesis of well dispersed Pd nanoparticles on reduced graphene oxide for electrocatalytic oxidation of formic acid
    International Journal of Hydrogen Energy, 42(37), 23639-23646.

  • Kumar, M. P., Raju, M. M., Arunchander, A., Selvaraj, S., Kalita, G., Narayanan, T. N., Sahu, A. K., Pattanayaka, D. K.. (2016)
    Nitrogen Doped Graphene as Metal Free Electrocatalyst for Efficient Oxygen Reduction Reaction in Alkaline Media and Its Application in Anion Exchange Membrane Fuel Cells
    Journal of The Electrochemical Society, 163(8), F848-F855. doi: 10.1149/2.0541608jes

  • Manoratne, C. H., Rosa, S. R. D., & Kottegoda, I. R. M. (2017)
    XRD-HTA, UV visible, FTIR and SEM interpretation of reduced graphene oxide synthesized from high purity vein graphite
    Material Science Research India, 14(1), 19-30.

  • Marinoiu, A., Raceanu, M., Andrulevicius, M., Tamuleviciene, A., Tamulevicius, T., Nica, S., Bala, D., Varlam, M. (2019)
    Low-cost preparation method of well dispersed gold nanoparticles on reduced graphene oxide and electrocatalytic stability in PEM fuel cell
    Arabian Journal of Chemistry.

  • Marinoiu, A., Raceanu, M., Carcadea, E., Marinescu, D., Teodorescu, C., Mellichio, A., ... & Stefanescu, I. (2016)
    Convenient graphene based materials as potential candidates for low cost fuel cell catalysts
    Reaction Kinetics, Mechanisms and Catalysis, 118(1), 281-296.

  • Tian, J., Gao, F., Yu, X., Wu, W., & Meng, H. (2017)
    Preparation of nitrogen-doped graphene by high-gravity technology and its application in oxygen reduction
    Particuology, 34, 110-117.

  • Umrao, S., Gupta, T. K., Kumar, S., Singh, V. K., Sultania, M. K., Jung, J. H., Oh, I. K., Srivastava, A. (2015)
    Microwave-Assisted Synthesis of Boron and Nitrogen co-doped Reduced Graphene Oxide for the Protection of Electromagnetic Radiation in Ku-Band
    ACS Appl Mater Interface. 7(35), 19831-19842. http://doi:10.1021/acsami.5b05890

  • Keywords

    nitrogen-doped graphene, microwave, ammonia

    Tag search nitrogen-doped graphene microwave ammonia