# US 11,898,077 B2 · Composition and method for producing same

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- Number: US 11,898,077 B2
- Document ID: US11898077B2
- Status: Granted
- Kind: B2
- Application number: 17/999,493
- Filed: 2021-02-12
- Published: 2023-05-04
- Granted: 2024-02-13
- Earliest claimed: 2020-05-21
- Assignees: Kureha Corporation
- Applicants: Kureha Corporation
- Inventors: Junya Uchida; Takumi Katsurao; Hiroshi Sakabe
- Web page: https://patentgrep.com/patent/US11898077B2

## CPC

- C01B 32/15: Nano-sized carbon materials
- C09K 11/70: containing phosphorus
- C01B 33/40: Clays
- C09K 11/72: also containing halogen, e.g. halophosphates
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- B82Y 40/00: Manufacture or treatment of nanostructures
- C01P 2006/90: Other properties not specified above
- 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

An object is to provide a composition that contains a phosphorus-containing carbon quantum dot and can efficiently emit relatively long wavelength light. The composition to achieve the above object contains: a phosphorus-containing carbon quantum dot containing phosphorus as a heteroatom; and a smectite.

## Claims

### Claim 1

A method of producing a composition, the method comprising:
preparing a solid mixture of a solid organic compound having a reactive group, a solid phosphorus compound, and a solid smectite; and
heating the mixture in a solid state to obtain a composition containing:
a phosphorus-containing carbon quantum dot containing phosphorus as a heteroatom, and
a smectite.

### Claim 2

A method of producing a composition, the method comprising:
preparing a solid mixture of a solid organic compound having a reactive group and a solid phosphorus compound;
heating the mixture in a solid state to obtain a phosphorus-containing carbon quantum dot containing phosphorus as a heteroatom; and
mixing the phosphorus-containing carbon quantum dot and a smectite in a solid state.