抄録
Carbon nanoparticles (CNPs) synthesis has increasingly been investigated because of its versatile applications in various fields ranging from novel electronic to biomedical products. Recently, arc discharge in water technique have been accepted as one of the most economical methods to product CNPs because it does not require any highly invested vacuum system, high pressure, and other expensive equipments. Moreover, arc in water technique is adaptable for mass production process. Therefore many attempts to investigate the operating parameters affecting the yield of CNPs synthesis using this method have been conducted. Among those parameters, however, the effects of ion species dissolved in the water on the synthesis of CNPs have not been clearly understood. Therefore, this investigation will be conducted to study the effect of aqueous ions added into the water with discharge current in the range of 30-100 A. The aqueous species investigated are Sodium carbonate representing ionic compound and ethanol representing organic species. As the preliminary results of our investigation using SEM and TEM analysis it is found that synthesized CNPs consisted of multi-walled carbon nanotubes, polyhedral particles and crystalline products. The concentration of aqueous species has significant effect on the structure of the synthesized CNPs. For the salt solutions, ion provided an influence on the types of CNPs formed meanwhile the existence of hydrocarbons also gave rise to similar influence.
