Synthesis of layered lipophilic graphene quantum dot over Fe@MgO catalyst

Friction and wear are two reasons that cause energy losses in mechanical activities. Lubrication is the main subject for improving energy efficiency and mechanical durability. Regardless of the completion of each metal surface, it contains ridges, valleys, asperities, and depressions1,2. Graphene and GQDs Nano scrolls can efficiently reduce frictional loss in engines, turbines, and other machines. By the way, replacing traditional lubricants, GQDs could help the environment by replacing petroleum-based lubricants that must be disposed of biological disaster3,4. The design in GQD synthesis is based on the following considerations: well surface passivation of GQDs plays a key role in quantum dots fabrication. In our research, we chose citric acid as the carbon source due to its well-known low carbonization temperature (<200ºC), and used octyl amine as the capping and functionalizing reagent because of functionalized and passivation surface states with carboxyl groups having a good photo-induced electron transfer property.

Keywords:

Graphene quantum dot (GQD) , Lipophilic material , Layered material , Fe@MgO catalyst , Friction , Lubricant , Oil additive