Preparation of carbon nanoparticles by electrical explosion of graphite rods

Graphite rods of 2 mm in diameter and 50 mm in length have been exploded in water to produce graphite nanoparticles with electrical energy from 5.5 to 44 kJ. The products of the explosion consisted of some fragments in a few micrometer size and many nanoparticles in diameter of several tens of nanom...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2015-10, Vol.43 (10), p.3489-3492
Main Authors: Cho, C, Jin, YS, Kim, YB, Kwak, D
Format: Article
Language:English
Subjects:
Carbon
Carbon magnetism
Discharges (electric)
Electric power
electrical explosion in liquid
Explosions
Graphite
graphite nanoparticles
Magnetization
Nanoparticles
Powders
pulsed power
Wires
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Summary:Graphite rods of 2 mm in diameter and 50 mm in length have been exploded in water to produce graphite nanoparticles with electrical energy from 5.5 to 44 kJ. The products of the explosion consisted of some fragments in a few micrometer size and many nanoparticles in diameter of several tens of nanometer. It is considered that local pressure and temperature were enough to convert the graphite rod to liquid droplets, which turned to the spherical shape of graphite nanoparticles by rapid cooling. The paramagnetism of the graphite nanopowder prepared in water has been revealed by vibrating sample magnetometer results. The degree of magnetization was proportional to the discharge energy and its maximum reached up to 0.56 emu/g.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2015.2427364