US 11,718,531 B2
Method for producing graphene quantum dots
Jun Hyuk Chung, Yongin-si (KR); Won Suk Jung, Gwangju-si (KR); and Tae Young Kim, Seoul (KR)
Assigned to DXOME CO., LTD., Seongnam-si (KR)
Appl. No. 17/273,887
Filed by DXOME CO., LTD., Seongnam-si (KR)
PCT Filed Sep. 7, 2018, PCT No. PCT/KR2018/010455
§ 371(c)(1), (2) Date Mar. 5, 2021,
PCT Pub. No. WO2020/050436, PCT Pub. Date Mar. 12, 2020.
Prior Publication US 2021/0316995 A1, Oct. 14, 2021
Int. Cl. C01B 32/225 (2017.01); C09K 11/65 (2006.01); B82Y 20/00 (2011.01); B82Y 40/00 (2011.01)
CPC C01B 32/225 (2017.08) [C09K 11/65 (2013.01); B82Y 20/00 (2013.01); B82Y 40/00 (2013.01); C01B 2204/32 (2013.01); C01P 2004/04 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of preparing graphene quantum dots, comprising:
a process of introducing a carbon-based layered structure into a reactor containing a solvent;
a process of forming an intercalation composite by inserting an intercalant between layers of the carbon-based layered structure;
a process of placing and heat-treating the intercalation composite on a substrate to weaken the interlayer attractive force of the intercalation composite; and
a process of exfoliating the intercalation composite by applying a voltage to the substrate to obtain graphene quantum dots.