Methods of producing graphene quantum dots from coal and coke
US9919927B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2014 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | May 2, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/774
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In some embodiments, the present disclosure pertains to methods of making graphene quantum dots from a carbon source (e.g., coal, coke, and combinations thereof) by exposing the carbon source to an oxidant. In some embodiments, the methods of the present disclosure further comprise a step of separating the formed graphene quantum dots from the oxidant. In some embodiments, the methods of the present disclosure further comprise a step of reducing the formed graphene quantum dots. In some embodiments, the methods of the present disclosure further comprise a step of enhancing a quantum yield of the graphene quantum dots. In further embodiments, the methods of the present disclosure also include a step of controlling the diameter of the formed graphene quantum dots by selecting the carbon source. In some embodiments, the formed graphene quantum dots comprise oxygen addends or amorphous carbon addends on their edges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.