Preparation and Characterization of CuO Nanoparticles Doped at Silica Matrix at Different Temperatures

The co-environmental xerogel samples are prepared by hydrolysis and condensation of tetraethyl ortho-silicate (TEOS) by the sol-gel method. These components are symboled as CuO@SiO2. In this investigation, a new molar ratio of H2O/TEOS is determined to be 11.7. Also, the necessary amounts of tri-hydrated copper nitrate and penta-hydrated copper sulfate are added to the solution in such a manner that the concentration of the copper oxide in final solution reach to 10-12 wt %. After ambient drying, the xerogel samples are heated at 400, 600, and 800˚C at a slow heating rate (50°C/h). The structuralproperties are characterized by Transmission Electron Microscopy (TEM), Brunauer, Emmett and Teller theory for specific surface area determination (BET) and Thermal Program Reduction (TPR) methods at different temperatures

Keywords:

Copper oxide , Nano-particles , Silica Matrix , Temperatures