# US 11,306,000 B2 · Graphene-based compound, preparation method thereof, and single-phase composition for preparing graphene-based compound and graphene quantum dot

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- Number: US 11,306,000 B2
- Document ID: US11306000B2
- Status: Granted
- Kind: B2
- Application number: 16/193,361
- Filed: 2018-11-16
- Published: 2019-10-17
- Granted: 2022-04-19
- Earliest claimed: 2018-04-12
- Assignees: Korea Advanced Institute of Science and Technology; Korea University Research and Business Foundation
- Applicants: Korea Advanced Institute of Science and Technology; Korea University Research and Business Foundation
- Inventors: O Ok Park; Seok Hwan Lee; Sang Hyuk Im
- Web page: https://patentgrep.com/patent/US11306000B2

## CPC

- C01B 32/194: After-treatment
- C01B 32/184: Preparation
- C09K 11/65: containing carbon (in organic compounds C09K11/06)
- B82Y 20/00: Nanooptics, e.g. quantum optics or photonic crystals
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- B82Y 40/00: Manufacture or treatment of nanostructures
- C01B 2204/22: Electronic properties
- C01P 2002/82: by IR- or Raman-data
- C01P 2002/84: by UV- or VIS- data
- C01P 2002/85: by XPS, EDX or EDAX data
- C01P 2004/04: obtained by TEM, STEM, STM or AFM
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

Provided are a graphene-based compound, a preparation method thereof, a single-phase composition for preparing a graphene-based compound, and a graphene quantum dot. Specifically, provided are a graphene-based compound prepared from a single-phase composition for preparing a graphene-based compound including hydrocarbyl amine, a hydroxyl group-containing carbon source, and an acid, a preparation method thereof, a single-phase composition for preparing a graphene-based compound, and a graphene quantum dot.

## Claims

### Claim 1

A single-phase composition for preparing a graphene-based compound comprising:
hydrocarbyl amine, a hydroxyl group-containing carbon source, an acid, and a C6-C20 hydrocarbyl alcohol-based solvent;
wherein the single-phase composition includes the hydroxyl group-containing carbon source and the hydrocarbyl amine in a molar ratio of 1:1 to 1:20.

### Claim 2 (depends on 1)

The single-phase composition for preparing a graphene-based compound of claim 1, wherein the hydroxyl group-containing carbon source includes a saccharide-based compound.

### Claim 3 (depends on 2)

The single-phase composition for preparing a graphene-based compound of claim 2, wherein the saccharide-based compound includes a monosaccharide compound.

### Claim 4 (depends on 1)

The single-phase composition for preparing a graphene-based compound of claim 1, wherein the acid includes an organic acid.

### Claim 5 (depends on 1)

The single-phase composition for preparing a graphene-based compound of claim 1, wherein the pH of the composition ranges from 4 to 7.

### Claim 6 (depends on 1)

The single-phase composition for preparing a graphene-based compound of claim 1, wherein the graphene-based compound includes a graphene quantum dot.

### Claim 7

A method for preparing a graphene-based compound comprising:
(a) preparing a reaction mixture including hydrocarbyl amine, a hydroxyl group-containing carbon source, an acid, and a hydrocarbyl alcohol-based solvent;
(b) heating the reaction mixture;
wherein the reaction mixture of step (a) includes the hydroxyl group-containing carbon source and the hydrocarbyl amine in a molar ratio of 1:1 to 1:20.

### Claim 8 (depends on 7)

The method of claim 7, wherein a reaction temperature in the (b) heating ranges from 60 to 300° C.

### Claim 9 (depends on 7)

The method of claim 7, further comprising:
mixing a reaction product obtained after the (b) heating with a (C1-C3) alcohol-based solvent.

### Claim 10 (depends on 7)

The method of claim 7, further comprising:
cooling the reaction product obtained after the (b) heating to a melting point or less of the hydrocarbyl amine.

### Claim 11 (depends on 7)

The method of claim 7, wherein the reaction mixture of the (a) preparing has a single phase.