Synthesis of Nano-CuO Powder via Sol– Gel and Investigation the Effective Factors on the Final Size

Document Type : Research Paper


1 Department of physics, University of Sistan and Baluchestan, Sistan and Baluchestan, Iran

2 Department of Chemistry, University of raparin, Kurdistan region, Iraq


In this investigation nano-sized copper oxide (CuO) powders have been prepared by the sol-gel method. The crystalline structure and morphology of the particles have been characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that the different preparation conditions such as concentration of reactant, calcinations time and calcinations temperature have a significant effect on the properties of CuO nano powders. Among the factors that influence final size of particles, the calcination temperature has the most influence. Optimum sample was attained at the concentration of 0.1 molar for copper nitrate and 1 molar for Sodium hydroxide, at 160oC calcination temperature, and 3 hours calcination time. While the density of copper nitride and sodium hydroxide are 0.1 M and 1M, respectively, pure copper oxide (CuO) is obtained. By raising the portion of the copper nitride density to that of sodium hydroxide, a new phase was appeared (Cu2O). However, the particles’ size became smaller. Stirring time is lengthened and no noticeable changes in the degree of purity and the particles size occurred.