IP Library › Granted Patent US 12,286,352
Granted Patent B2
US 12,286,352 · App. 17/554,293 · Granted Apr 29, 2025

Flame-synthesis of monolayer and nano-defective graphene

Inventors: Stephen D. Tse (Warren, NJ); Hua Hong (Weehawken, NJ); Bernard H. Kear (Whitehouse Station, NJ)
Assignee: Rutgers, the State University of New Jersey
C01B32/184B82Y40/00C01P2002/52C01P2002/82
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Quick Facts
Patent No.
US 12,286,352
App. No.
17/554,293
Granted
Apr 29, 2025
Kind
B2
Abstract

Methods for the production of carbon-based and other nanostructures are provided.

Claims (41)

1. An ultrafiltration membrane, wherein said ultrafiltration membrane comprises a nano-defective graphene film, wherein the nano-defective graphene film has an ID/IG ratio of 1.2 or higher, and wherein said nano-defective graphene film is a monolayer.

2. The ultrafiltration membrane of claim 1 , wherein said nano-defective graphene film is selected from the group consisting of sheets, plates, and discs.

3. The ultrafiltration membrane of claim 1 , wherein the nano-defective graphene film is synthesized by reacting an oxidizer and a fuel in a modified multiple, inverse-diffusion flame burner,

wherein said modified multiple, inverse-diffusion flame burner comprises delivery tubes for the fuel extending beyond a main burner surface, wherein said method comprises:

a) reducing a metal substrate in said modified, multiple inverse-diffusion flame burner wherein hydrogen (H 2 ) is the only fuel;

b) adding a hydrocarbon precursor through the fuel lines extending beyond the main burner surface of the modified, multiple inverse-diffusion flame burner to synthesize the graphene on said substrate; and, optionally,

c) annealing the flame-synthesized graphene of step b) by running the modified, multiple inverse-diffusion flame burner wherein hydrogen (H 2 ) is the only fuel.

4. The ultrafiltration membrane of claim 3 , wherein said method comprises annealing the flame-synthesized graphene of step b) by running the modified, multiple inverse-diffusion flame burner wherein hydrogen (H 2 ) is the only fuel.

5. The ultrafiltration membrane of claim 3 , wherein said metal substrate is less than 99.9% pure.

6. The ultrafiltration membrane of claim 3 , where the modified, multiple, inverse-diffusion-flame burner comprises an array of stabilized flames that form radially uniform temperature and species distribution downstream.

7. The ultrafiltration membrane of claim 3 , wherein the oxidizer is air, O 2 , or an oxidizing agent.

8. The ultrafiltration membrane of claim 3 , wherein the metal substrate is copper, nickel, steel, transition metals, alloys thereof, or spinels thereof.

9. The ultrafiltration membrane of claim 3 , where the fuel contains at least one additive, thereby forming doped nano-defective graphene films.

10. The ultrafiltration membrane of claim 9 , wherein the additive is a nitrogen species or a boron species.

11. The ultrafiltration membrane of claim 1 , wherein said nano-defective graphene film is doped with ions.

12. The ultrafiltration membrane of claim 11 , wherein said nano-defective graphene film is doped with ions in vacant atomic sites.

13. The ultrafiltration membrane of claim 11 , wherein said ions are metal ions.

14. A method of ultrafiltration, said method comprising passing a gas or liquid through the ultrafiltration membrane of claim 1 .

15. The method of claim 14 , wherein said ultrafiltration is ion selection, gas separation, water desalination, or gas molecule sensing.

16. The method of claim 14 , said method further comprising synthesizing said nano-defective graphene film.

17. The ultrafiltration membrane of claim 1 , wherein said nano-defective graphene film is a sheet.

18. An ultrafiltration membrane, wherein said ultrafiltration membrane comprises a nano-defective graphene film, wherein the nano-defective graphene film has an I D /I G ratio of 1.2 or higher, wherein said nano-defective graphene film is a sheet.

19. The ultrafiltration membrane of claim 18 , wherein said nano-defective graphene film is a monolayer or a few layer.

20. A method of ultrafiltration, said method comprising passing a gas or liquid through the ultrafiltration membrane of claim 18 .

21. The ultrafiltration membrane of claim 18 , wherein said nano-defective graphene film is a monolayer sheet.

22. A method of ultrafiltration, said method comprising passing a gas or liquid through the ultrafiltration membrane of claim 18 .

23. The method of claim 22 , wherein said ultrafiltration is ion selection, gas separation, water desalination, or gas molecule sensing.

24. An ultrafiltration membrane, wherein said ultrafiltration membrane consists of a nano-defective graphene film, wherein the nano-defective graphene film has an I D /I G ratio of about 0.6 or higher, and wherein said nano-defective graphene film is a monolayer.

25. A method of ultrafiltration, said method comprising passing a gas or liquid through the ultrafiltration membrane of claim 24 .

26. The method of claim 25 , wherein said ultrafiltration is ion selection, gas separation, water desalination, or gas molecule sensing.

27. An ultrafiltration membrane, wherein said ultrafiltration membrane consists of a nano-defective graphene film, wherein the nano-defective graphene film has an I D /I G ratio of about 0.6 or higher, wherein said nano-defective graphene film is a sheet.

28. A method of ultrafiltration, said method comprising passing a gas or liquid through the ultrafiltration membrane of claim 27 .

29. The method of claim 28 , wherein said ultrafiltration is ion selection, gas separation, water desalination, or gas molecule sensing.

30. A method of synthesizing an ultrafiltration membrane, wherein said ultrafiltration membrane comprises a nano-defective graphene film, wherein the nano-defective graphene film has an I D /I G ratio of about 0.6 or higher, said method comprising synthesizing the nano-defective graphene film by

a) reducing a metal substrate in said modified, multiple inverse-diffusion flame burner wherein hydrogen (H 2 ) is the only fuel, wherein said modified multiple, inverse-diffusion flame burner comprises delivery tubes for the fuel extending beyond a main burner surface;

b) adding a hydrocarbon precursor through the fuel lines extending beyond the main burner surface of the modified, multiple inverse-diffusion flame burner to synthesize the graphene on said substrate; and

c) annealing the flame-synthesized graphene of step b) by running the modified, multiple inverse-diffusion flame burner wherein hydrogen (H 2 ) is the only fuel.

31. A method of ultrafiltration, said method comprising passing a gas or liquid through an ultrafiltration membrane, wherein said ultrafiltration membrane comprises a nano-defective graphene film, wherein the nano-defective graphene film has an I D /I G ratio of about 0.6 or higher, said method further comprising synthesizing said nano-defective graphene film by:

a) reducing a metal substrate in a modified, multiple inverse-diffusion flame burner wherein hydrogen (H 2 ) is the only fuel, wherein said modified multiple, inverse-diffusion flame burner comprises delivery tubes for the fuel extending beyond a main burner surface;

b) adding a hydrocarbon precursor through the fuel lines extending beyond the main burner surface of the modified, multiple inverse-diffusion flame burner to synthesize the graphene on said substrate; and, optionally,

c) annealing the flame-synthesized graphene of step b) by running the modified, multiple inverse-diffusion flame burner wherein hydrogen (H 2 ) is the only fuel.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 19, 2022
From: TSE, STEPHEN D.; KEAR, BERNARD H.; HONG, HUA
To: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY
Reel/Frame 061232/0963 →
Continuity (3)
Continuation 16229055 · Dec 21, 2018
Provisional Application 62608739 · Dec 21, 2017
Related Publication 20220250913A1 · Aug 11, 2022
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