Synthesis, characterization and X-ray spectral investigation of hollow graphitic carbon nanospheres

Bogdan Ilkiv, Svitlana Petrovska, Ruslan Sergiienko, Oleksandr Foya, Oleksandra Ilkiv, Etsuro Shibata, Takashi Nakamura, Yaroslav Zaulychnyy

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Hollow graphitic carbon nanospheres (HGCNSs) obtained by treatment of iron carbide-filled carbon nanocapsules were investigated using the ultra-soft X-ray emission spectroscopy method. Carbon nanocapsules were synthesized by the plasma discharge method in an ultrasonic cavitation field of liquid hexane. It was revealed that additional mixed π + σ-overlapping occurred in the hollow graphitic carbon nanospheres as a result of the bending of the graphene sheets. Some iron atoms remained after washing in acid. It was found that in the hollow graphitic carbon nanospheres, sp-hybrid bonds formed between the carbon and residual iron atoms when high-energy 3d + 4s-states overlapped with sp n-hybrid orbitals (2 < n < 3). Scanning and transmission electron microscopy methods were used to study the spatial morphology and structure of the fabricated HGCNSs. The electronic structures of the HGCNSs were compared with those of reference synthetic graphite powder, carbon onions, and graphene nanosheets.

Original languageEnglish
Pages (from-to)616-621
Number of pages6
JournalJournal of Alloys and Compounds
Publication statusPublished - 2014 Dec 25


  • Electronic structure
  • Graphene
  • Hollow carbon nanosphere
  • Scanning electron microscopy (SEM)
  • Transmission electron microscopy (TEM)
  • X-ray emission spectroscopy


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