Synthesis of zinc oxide nano-particles using carbon dioxide by DC plasma jet

ZnO nano-particles were synthesized during carbon dioxide (CO2) decomposition using a DC plasma jet. The oxygen molecules obtained from CO2 decomposition and micro-sized Zn powders were used as raw materials. The operating variables were CO2 flow rate, the carrier gases, and the inside diameters of the reaction tube. The decomposition rate of CO2 was analyzed by gas chromatography (GC). The synthesized ZnO nano-particles were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The results of XRD showed that the synthesized ZnO nano-particles had a high crystalline wurzite structure. The morphologies of the synthesized ZnO were varied depending on the inside diameter of the reaction tube. The diameter of the rod-shaped ZnO ranged from 25 to 100 nm with an average diameter of 50 nm.