Following filtration, a dark black, thick, and shiny gel of Selenium oxide nanoparticles was obtained on the filter paper. To remove excess solvent, this gel was heated in a thermal oven at 110°C for 30 minutes. Semi-dried Selenium oxide nanoparticles were then placed in a Vacuum Desiccator with silica gel granules for moisture absorption as shown in Figure . After three days, the product appeared as a brittle greyish black solid, which was further ground into powder form.