Publication detail

On the Transition of Reaction Pathway during Microwave Plasma Gas-Phase Synthesis of Graphene Nanosheets: From Amorphous to Highly Crystalline Structure

TOMAN, J. JAŠEK, O. SNIRER, M. PAVLIŇÁK, D. NAVRÁTIL, Z. JURMANOVÁ, J. CHUDJÁK, S. KRČMA, F. KUDRLE, V. MICHALIČKA, J.

Original Title

On the Transition of Reaction Pathway during Microwave Plasma Gas-Phase Synthesis of Graphene Nanosheets: From Amorphous to Highly Crystalline Structure

Type

journal article in Web of Science

Language

English

Original Abstract

Fourier-transform infrared spectroscopy and proton-transfer-reaction-mass spectrometry are used in a complementary way to study gas-phase processes during decomposition of ethanol in a microwave plasma torch. Decomposition products (C, C-2 and simple hydrocarbons) reassemble into higher hydrocarbons and graphene nuclei and further grow into graphene nanosheets (GNS). Depending on microwave power, ethanol flow rate and molecular gas admixture, the material structure changes from amorphous to crystalline. The presence of C2n + 1Hy species was found to be responsible for the formation of defects in the GNS structure. O-2 and H-2 admixtures change the gas temperature axial profile and consequently modify reaction pathways influencing growth and production rate of GNS. Determination of reaction pathway selectivity enables us to predict whether high-quality or defective GNS are produced.

Keywords

: admixture, graphene nanosheets, microwave plasma, nucleation, plasma synthesis; hydrogen-production, ethanol decomposition, soot formation, inception growth kinetics

Authors

TOMAN, J.; JAŠEK, O.; SNIRER, M.; PAVLIŇÁK, D.; NAVRÁTIL, Z.; JURMANOVÁ, J.; CHUDJÁK, S.; KRČMA, F.; KUDRLE, V. ; MICHALIČKA, J.

Released

10. 5. 2021

ISBN

1612-8850

Periodical

Plasma Processes and Polymers

Year of study

18

Number

8

State

Federal Republic of Germany

Pages from

202100008

Pages to

202100008

Pages count

22

URL

https://onlinelibrary.wiley.com/doi/epdf/10.1002/ppap.202100008?saml_referrer

BibTex

@article{BUT172121,
  author="TOMAN, J. and JAŠEK, O. and SNIRER, M. and PAVLIŇÁK, D. and NAVRÁTIL, Z. and JURMANOVÁ, J. and CHUDJÁK, S. and KRČMA, F. and KUDRLE, V. and MICHALIČKA, J.",
  title="On the Transition of Reaction Pathway during Microwave Plasma Gas-Phase Synthesis of Graphene Nanosheets: From Amorphous to Highly Crystalline Structure",
  journal="Plasma Processes and Polymers",
  year="2021",
  volume="18",
  number="8",
  pages="202100008--202100008",
  doi="10.1002/ppap.202100008",
  issn="1612-8850",
  url="https://onlinelibrary.wiley.com/doi/epdf/10.1002/ppap.202100008?saml_referrer"
}