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CARBONLETT, vol. 28, no. 1, pp.31-37, 2018

DOI: http://dx.doi.org/ DOI:10.5714/CL.2018.28.031

Simple one-step synthesis of carbon nanoparticles from aliphatic alcohols and n-hexane by stable solution plasma process

Choon-Sang Park1,*, Dae Sub Kum1,*, Jong Cheol Kim2, Jun-Goo Shin1, Hyun-Jin Kim3, Eun Young Jung1, Dong Ha Kim1, Daseulbi Kim1, Gyu Tae Bae1, Jae Young Kim4, Bhum Jae Shin5, and Heung-Sik Tae1,♠

Affiliation: 1School of Electronics Engineering, College of IT Engineering, Kyungpook National University, Daegu 41566, Korea
2Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea
3SEMES, Cheonan 31040, Korea
4Department of New Biology, Daegu Gyeongbuk Institute of Science & Technology, Daegu 42988, Korea
5Department of Electronics Engineering, Sejong University, Seoul 05006, Korea

Abstract: This paper examines a simple one-step and catalyst-free method for synthesizing carbon nanoparticles from aliphatic alcohols and n-hexane with linear molecule formations by using a stable solution plasma process with a bipolar pulse and an external resistor. When the external resistor is adopted, it is observed that the current spikes are dramatically decreased, which induced production of a more stable discharge. Six aliphatic linear alcohols (methanol-hexanol) containing carbon with oxygen sources are studied as possible precursors for the massive production of carbon nanoparticles. Additional study is also carried out with the use of n-hexane containing many carbons without an oxygen source in order to enhance the formation of carbon nanoparticles and to eliminate unwanted oxygen effects. The obtained carbon nanoparticles are characterized with field emission-scanning electron microscopy, energy dispersive X-ray spectroscopy, and Raman spectroscopy. The results show that with increasing carbon ratios in alcohol content, the synthesis rate of carbon nanoparticles is increased, whereas the size of the carbon nanoparticles is decreased. Moreover, the degree of graphitization of the carbon nanoparticles synthesized from 1-hexanol and n-hexane with a high carbon (C)/oxygen (O) ratio and low or no oxygen is observed to be greater than that of the carbon nanoparticles synthesized from the corresponding materials with a low C/O ratio.

Keyword: arc discharge, scanning electron microscopy, particle size, carbon precursor, carbon composites