Buy a bag of white powdered donuts. The powder contains a chemical called titanium dioxide (TiO2). Titanium dioxide is a useful material for creating solar cells. Unfortunately, the titanium dioxide you get from a powdered donut will be not be pure. It will be mixed with sugars and fats. To remove the sugar, stir the powder into warm water and then pour it through a filter (a coffee filter will work fine). The sugar will dissolve in the water and pass right through the filter. The solid left behind is a mixture of titanium dioxide and fats. Use roughly one cup of water for every five donuts. The fats are not water soluble, and so they remain mixed with the titanium dioxide after filtration. Fortunately, it is quite easy to remove them. Put the powder on a heat safe dish and bake it at 500 °F (260 °C) for about three hours. This will vaporize the fats and leave behind a titanium dioxide powder.
جمع مسحوق الدونات. أذب السكر. أزل الدهون.