Question

Difference between sol gel and coprecipitation

Answer 1

There is a difference between sol-gel and wet-precipitation method even the raw materials are the same. In sol-gel method, you do not need to precipitate the sample (after mixing), however, in wet-precipitation method, you need to treat the mixtures by stirring with magnetic stir bar and ageing for 24 h at room temperature. The supernant was decanted. The precipitate was subjected to vacuum filtering using filter paper adapted in a Büchner funnel and so on. Then, the precipitates were dried in certain period of time. In addition, sol-gel method gives  a better result, such as particle size, less agglomerated sample and etc.