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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
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" }