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Comparison of the effect of argon, hydrogen, and nitrogen gases on the reduced graphene oxide-hydroxyapatite nanocomposites characteristics

  • Nosrati, Hassan1
  • Sarraf-Mamoory, Rasoul1
  • Karimi Behnagh, Arman2
  • Zolfaghari Emameh, Reza3
  • Aidun, Amir4, 5
  • Le, Dang Quang Svend6
  • Canillas Perez, Maria7
  • Bünger, Cody Eric6
  • 1 Tarbiat Modares University, Tehran, Iran , Tehran (Iran)
  • 2 Iran University of Medical Science, Tehran, Iran , Tehran (Iran)
  • 3 National Institute of Genetic Engineering and Biotechnology (NIGEB), 14965/161, Tehran, Iran , Tehran (Iran)
  • 4 National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran , Tehran (Iran)
  • 5 Universal Scientific Education and Research Network (USERN), Tehran, Iran , Tehran (Iran)
  • 6 Aarhus University, Aarhus, Denmark , Aarhus (Denmark)
  • 7 Instituto de Cerámica Y Vidrio, CSIC, Madrid, Spain , Madrid (Spain)
Published Article
BMC Chemistry
Springer International Publishing
Publication Date
Oct 07, 2020
DOI: 10.1186/s13065-020-00712-3
Springer Nature


In this study, the effect of the argon, nitrogen, and hydrogen gases on the final properties of the reduced graphene oxide- hydroxyapatite nanocomposites synthesized by gas injected hydrothermal method was investigated. Four samples were synthesized, which in the first sample the pressure was controlled by volume change at a constant concentration. In subsequent samples, the pressure inside the autoclave was adjusted by the injecting gases. The initial pressure of the injected gases was 10 bar and the final pressure considered was 25 bar. The synthesized powders were consolidated at 950 °C and 2 MPa by spark plasma sintering method. The final samples were subjected to Vickers indentation analysis. The findings of this study indicate that the injection of argon, hydrogen, and nitrogen gases improved the mechanical properties of the nanocomposites. Injection of gases increased the crystallinity and particle size of hydroxyapatite, and this increase was greater for nitrogen gas than for others. Injection of these gases increased the rate of graphene oxide reduction and in this case the effect of nitrogen gas was greater than the others.

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