A Green Method for Recycling 2‐Propanol from Water during Purification Process of Aqueous Nanocrystals

During traditional 2‐propanol‐based purification of aqueous nanocrystals (NCs), it is very difficult to recycle 2‐propanol from the aqueous solution, which brings great consumption of 2‐propanol during the purification process. A major contribution of this work is to provide a simple way to reduce the consumption via recycling of 2‐propanol during the purification process. The recycled 2‐propanol is available for precipitating NCs from aqueous solution in a new round of NC purification process. Due to the recycling of 2‐propanol, the great consumption of 2‐propanol can be avoided, which makes the purification process of aqueous NCs much greener and at a much lower cost.