# US 12,600,635 B2 · Process and device for preparing graphene quantum material

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- Number: US 12,600,635 B2
- Document ID: US12600635B2
- Status: Granted
- Kind: B2
- Application number: 17/936,204
- Filed: 2022-09-28
- Published: 2023-03-30
- Granted: 2026-04-14
- Earliest claimed: 2021-09-29
- Assignees: Yunnan Huapu Quantum Material Co., Ltd; Chongqing Institute of East China Normal University; East China Normal University; Roi Optoelectronics Technology Co, Ltd.; Chongqing Huapu Scientific Instrument Co., Ltd.; Chongqing Huapu Intelligent Equipment Co., Ltd.; Guangdong Roi Optoelectronics Technology Co., Ltd.
- Applicants: Yunnan Huapu quantum Material Co., Ltd; Chongqing Institute of East China Normal University; East China Normal University; ROI Optoelectronics Technology CO, LTD.; Chongqing Huapu Scientific Instrument Co., Ltd.; Chongqing Huapu Intelligent Equipment Co., Ltd.; GuangDong ROI Optoelectronics Technology Co., Ltd.
- Inventors: Heping Zeng; Mengyun Hu; Chuan Yang
- Web page: https://patentgrep.com/patent/US12600635B2

## CPC

- C01B 32/182: Graphene
- C01B 32/194: After-treatment
- Y02E 60/10: Energy storage using batteries
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A process for preparing a graphene quantum material includes: providing a carbon-containing precursor; decomposing the carbon-containing precursor with ultra-fast laser to obtain the graphene quantum material; optionally reducing graphene oxide into graphene with laser; and optionally subjecting the graphene quantum material to microwave heating.

## Claims

### Claim 1

A process for preparing a graphene quantum material, comprising:
providing a carbon-containing precursor;
decomposing the carbon-containing precursor with an ultra-fast laser to obtain the graphene quantum material;
optionally reducing graphene oxide into graphene with a laser; and
optionally subjecting the graphene quantum material to microwave heating;
wherein the carbon-containing precursor comprises biomass containing cellulose, lignin, or starch;
the biomass is selected from plant biomass, comprising crop straws and husks, wood, wood chips, barks, branches, roots, leaves, fruits and vegetables;
wherein providing the carbon-containing precursor comprises:
adding one or more of powders of an organic polymer and powders of a non-polymeric carbon material to flakes or powders of the biomass;
the organic polymer comprises at least one of polyimide (PI), polyethylene (PE), and polypropylene (PP); and
the non-polymeric carbon material comprises at least one of graphite, charcoal, carbon black, coal.

### Claim 2 (depends on 1)

The process of claim 1, wherein the graphene quantum material comprises at least one of graphene powders, graphene quantum dots, graphene mesoporous materials; and the process further comprises:
coating a substrate with one or more layers comprising the graphene quantum material.

### Claim 3 (depends on 1)

The process of claim 1, further comprising:
drying the plant biomass; or
carbonizing the plant biomass under vacuum.

### Claim 4 (depends on 1)

The process of claim 1, wherein decomposing the carbon-containing precursor comprises:
adding one or more of graphite quantum dots, graphene oxide quantum dots, and graphene quantum dots to the carbon-containing precursor as a catalyst.

### Claim 5 (depends on 1)

The process of claim 1, wherein the ultra-fast laser is picosecond laser or femtosecond laser.

### Claim 6 (depends on 1)

The process of claim 1, wherein the ultra-fast laser is at an ultraviolet to near-infrared, mid-infrared, or far-infrared wavelength region, and in a wavelength range of 200 to 14000 nm.

### Claim 7 (depends on 1)

The process of claim 1, wherein the ultra-fast laser is single-wavelength laser, dual-wavelength laser, multi-wavelength laser, or a combination thereof.

### Claim 8 (depends on 1)

The process of claim 1, wherein decomposing the carbon-containing precursor with the ultra-fast laser comprises:
decomposing the carbon-containing precursor with laser points or lines at a processing position selected from a laser focusing position or a laser defocusing position in a laser scanning mode selected from single continuous scanning or multiple cyclic scanning.

### Claim 9 (depends on 1)

The process of claim 1, wherein the laser for reducing the graphene oxide into graphene is selected from continuous laser or pulsed laser.

### Claim 10 (depends on 1)

The process of claim 1, wherein the laser for reducing the graphene oxide into graphene is at an ultraviolet wavelength region of 200 to 400 nm, a visible wavelength region of 400 to 760 nm, or an infrared wavelength region of 760 to 14000 nm.

### Claim 11 (depends on 1)

The process of claim 1, wherein reducing graphene oxide into graphene with the laser comprises:
reducing graphene oxide into graphene with laser points or lines at a processing position selected from a laser focusing position or a laser defocusing position in a laser scanning mode selected from single continuous scanning or multiple cyclic scanning.

### Claim 12 (depends on 1)

The process of claim 1, wherein the microwave heating is carried out by a microwave in an inert environment or in a vacuum environment, and the microwave is selected from continuous microwave or pulsed microwave.