Magnetic carbon nanomaterials and methods of making same

Patent metadata

Field	Value
Publication number	US-11512398-B2
Application number	US-202117314698-A
Country	US
Kind code	B2
Filing date	May 7, 2021
Priority date	May 8, 2020
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

The embodiments of the present disclosure relate to a method, system and composition producing a magnetic carbon nanomaterial product that may comprise carbon nanotubes (CNTs) at least some of which are magnetic CNTs (mCNTs). The method and apparatus employ carbon dioxide (CO2) as a reactant in an electrolysis reaction in order to make mCNTs. In some embodiments of the present disclosure, a magnetic additive component is included as a reactant in the method and as a portion of one or more components in the system or composition to facilitate a magnetic material addition process, a carbide nucleation process or both during the electrosynthesis reaction for making magnetic carbon nanomaterials.

First claim

I claim:

1. A method for producing a magnetic carbon nanomaterial product comprising:
a) heating an electrolyte media to obtain a molten electrolyte media;
b) positioning the molten electrolyte media between an anode and a cathode of an electrolytic cell;
c) introducing a magnetic additive component within the electrolytic cell for performing carbide-driven growth of the magnetic carbon nanomaterial product;
d) introducing a source of carbon within the electrolytic cell;
e) applying an electrical current to the cathode and the anode in the electrolytic cell; and,
f) collecting the magnetic carbon nanomaterial product from the cathode, wherein the magnetic carbon nanomaterial is moveable with a magnetic field.

2. The method of claim 1 , wherein the magnetic additive component comprises at least one of a magnetic material addition component, a carbide-growth component and any combination thereof.

3. The method of claim 1 , further comprising a step of selecting a nano-morphology of a constituent of the magnetic carbon nanomaterial product to comprise a magnetic carbon nanotube product, a magnetic carbon nanofiber product, a magnetic carbon platelet product, a magnetic graphene product, a magnetic carbon nano-onion product, a magnetic, a hollow carbon nano-sphere product and any combination thereof.

4. The method of claim 1 , wherein the magnetic carbon nanomaterial product is attracted to a magnet.

5. The method of claim 2 , wherein the carbide-growth component is a metal carbide.

6. The method of claim 5 , wherein the metal carbide is one of an iron carbide, a nickel carbide, a cobalt carbide; a zirconium carbide, a chromium carbide, a tantalum carbide, a hafnium carbide and any combination thereof.

7. The method of claim 6 , wherein the metal carbide is the iron carbide.

8. The method of claim 2 , wherein the carbide-growth component is a non-metal carbide.

9. The method of claim 8 , wherein the non-metal carbide is one of a silicon carbide, a germanium carbide and any combination thereof.

10. The method of claim 2 , wherein the magnetic material additive component is one or more of iron, nickel, cobalt, gadolinium, samarium, neodymium, steel and alloys comprising one or more magnetic materials with ferromagnetic properties, paramagnetic properties, diamagnetic properties and any combination thereof.

11. The method of claim 1 , wherein the electrolysis cell comprises one or more walls that are composed of steel, stainless steel, iron, cast iron, a coating that comprises nickel, a nickel alloy, iron, cast iron, an alloy that comprises iron and any combination thereof.

12. The method of claim 1 , wherein the magnetic additive component is incorporated or formed as one or more nodules on the magnetic carbon nanomaterial product.

13. The method of claim 12 , wherein the nodules are covered by one or more layers of graphitic carbon.

14. The method of claim 1 , wherein the magnetic additive component originates from one or more walls of the electrolysis cell, from the anode, from the cathode, the electrolyte media and any combination thereof.

15. The method of claim 1 , wherein the magnetic additive component originates from an iron-based additive that is added to the electrolyte media.

16. The method of claim 15 , wherein the iron-based additive is one or more of cast iron powder, iron metal, steel, stainless steel, an iron containing metal alloy, an iron oxide, FeO, Fe 2 O 3 , Fe 3 O 4 , or aniron containing salt.

17. The method of claim 1 , wherein the source of carbon is carbon dioxide, the electrolyte media, the molten electrolyte media and any combination thereof.

18. The method of claim 1 , wherein the electrolyte media comprises:
a) a carbonate; and
b) a magnetic additive component.

19. The method of claim 18 , wherein the carbonate comprises a carbide-growth component.

20. The method of claim 18 , wherein the magnetic additive component comprises at least one of a magnetic material additive component, a carbide-growth component and any combination thereof.

21. The method of claim 18 , wherein the carbonate is an alkali carbonate, an alkali earth carbonate and any combination thereof.

22. The method of claim 18 , wherein the carbonate comprises an oxide, a borate, a sulfate, a nitrate, a chloride, a chlorate, a phosphate and any combination thereof.

23. The method of claim 18 , wherein the magnetic additive component is an iron-based additive.

24. The method of claim 23 , wherein the iron-based additive is one or more of cast iron powder, iron metal, steel, stainless steel, an iron containing metal alloy, an iron oxide, FeO, Fe 2 O 3 , Fe 3 O 4 , an iron containing salt and any combination thereof.

25. The method of claim 18 , wherein the magnetic additive component is present in an amount of about 0.001 molal to about 10 molal or higher.

Assignees

• C2Cnt Llc

Inventors

• Licht Stuart

Classifications

• D01F11/12

  with inorganic substances {; Intercalation} · CPC title

• C25B11/046

  Alloys · CPC title

• C25B9/60

  Constructional parts of cells · CPC title

• C25B1/50

  Processes · CPC title

• C01P2006/42

  Magnetic properties · CPC title