Carbon nanomaterials such as carbon nanotubes (CNTs) and carbon nanospheres (CNS) were synthesized from sucrose solution using an arc discharge method without graphite electrodes. In this process, the nanocarbon products were formed from carbon atoms supplied by the sucrose in solution rather than from the graphite of the electrodes. One of the advantages of this method is that the nanomaterials are produced in agglomerated forms, and there are no generated toxic gases during arcing process.