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Scenario of carbon‐encapsulated particle synthesis by spark discharges in liquid hydrocarbons
Author(s) -
Hamdan Ahmad,
Liu JingLin
Publication year - 2021
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.202100013
Subject(s) - pyrolysis , materials science , particle (ecology) , hydrocarbon , carbon fibers , particle size , shell (structure) , electrode , chemical engineering , spray pyrolysis , ultrafine particle , thermal , analytical chemistry (journal) , composite material , nanotechnology , chemistry , organic chemistry , thermodynamics , thin film , oceanography , physics , composite number , engineering , geology
Discharges in liquid hydrocarbons produce submicrometric particles with a graphitic shell. In this study, discharges are generated between two Cu electrodes immersed in various liquid hydrocarbons, and the produced particles are characterized by various techniques. The obtained results indicate that the thickness of the particle shell increases with increasing particle size; for instance, it is ~4 nm for small particles (~25 nm) and ~30 nm for large particles (~1 µm). Such variation in shell thickness is attributed to variations in the thermal properties of different‐size particles. On the basis of qualitative analysis, we assume that shell growth is induced by local pyrolysis (or pyrolysis‐like process) of the liquid hydrocarbon due to the ejection of hot particles from the electrodes.