Method for preparing inorganic-nanostructure composite material, method for preparing carbon nanotube composite using same, and carbon nanotube composite prepared thereby

• US 9,375,751 B2
• Filed: 11/29/2011
• Issued: 06/28/2016
• Est. Priority Date: 01/07/2011
• Status: Active Grant

• Current Assignee: Korea Advanced Institute of Science and Technology
• Original Assignee: Korea Advanced Institute of Science and Technology
• Inventors: Kim, Sang-Ouk, Lee, Won-jun, Lee, Duck-hyun, Lee, Jin-ah
• Primary Examiner(s): Jolley, Kirsten
• Application Number:
  US13/704,611
• Publication Number:
  US 20130089735A1
• Time in Patent Office: 1,673 Days
• US Class Current: 1/1
• CPC Class Codes: B05D 1/18 performed by dipping
• CPC Class Codes: B05D 3/002 Pretreatement
• CPC Class Codes: B05D 3/104 Pretreatment of other substrates
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C01B 32/16 Preparation
• CPC Class Codes: C01B 32/168 After-treatment
• CPC Class Codes: Y10T 428/2918 including free carbon or carbide or therewith [not as steel]
• CPC Class Codes: Y10T 428/2991 Coated

Abstract

A method for manufacturing an inorganic-nano structure composite, a method for manufacturing a cabon nanotube composite by using the same, and a carbon nanotube composite manufactured by the same are provided. The method for manufacturing the inorganic-nano structure composite comprises a step of doping pentavalent elements on the nanostructure; and a step of growing the inorganic material from the doping points of the pentavalent elements by dipping the nanostructure on which the pentavalent elements are doped into a precursor solution of the inorganic material, and according to the present invention the pentavalent elements such as nitrogen are doped on the nanostructure and is utilized as the crystallization point of the inorganic material, instead of forming the separate coating layer to the organic-based nanostructure, or binding the binding group to the surface.

Claims

1. A method for manufacturing a nanostructure composite, the method comprising:

a step of doping pentavalent elements to a nanostructure and then forming doping points; and

a step of growing a metal oxide from the doping points of the nanostructure by dipping the nanostructure having the doping points into a precursor solution of the metal oxide to be grown,

wherein the step of the growth of the metal oxide is carried out at a room temperature.

2. The method for manufacturing a nanostructure composite according to claim 1, wherein the nanostructure is a carbon nanostructure.

3. The method for manufacturing a nanostructure composite according to claim 2, wherein the carbon nanostructure comprises a hexagonal graphite structure, and the doped pentavalent elements are substituted for carbon atoms of the graphite structure.

4. The method for manufacturing a nanostructure composite according to claim 3, wherein the carbon nanostructure is any one selected from the group consisting of carbon nanotube, carbon nanowire and graphene.

5. The method for manufacturing a nanostructure composite according to claim 1, wherein the metal oxide is selected from the group consisting of titanium oxide, ruthenium oxide, zinc oxide, manganese dioxide, and molybdenum oxide.

6. A method for manufacturing a carbon nanotube composite on which a metal oxide is coated, the method comprising:

a step of doping a pentavalent elements to carbon nanotubes; and

a step of coating the doped carbon nanotubes with the metal oxide,

wherein the step of coating the metal oxide is progressed in such a manner that the carbon nanotubes on which the pentavalent elements are doped are dipped into a solution containing the metal oxide to be coated, and then maintained for the predetermined times.

7. The method for manufacturing a carbon nanotube composite according to claim 6, wherein the carbon nanotubes grow vertically from a substrate, and the method further comprising a step of hydrophilic-treating the carbon nanotubes so that the solution comprising the metal oxide is sufficiently penetrated between the nanotubes before the coating step.

8. The method for manufacturing a carbon nanotube composite according to claim 7, wherein the hydrophilic-treating step is progressed in such a manner that the carbon nanotubes are immersed into the hydrophilic solvent.

9. The method for manufacturing a carbon nanotube composite according to claim 7, further comprising a step of depositing a catalyst on the substrate and wherein the catalyst is selected from the group consisting of Fe, Ni and Cu.

10. The method for manufacturing a carbon nanotube composite according to claim 9, wherein the carbon nanotubes grow vertically by the method selected from the group consisting of plasma enhanced chemical vapor deposition, sputtering and, graphitizing of the polymer.

11. The method for manufacturing a carbon nanotube composite according to claim 6, wherein the metal oxide is selected from the group consisting of titanium oxide, ruthenium oxide, zinc oxide, manganese dioxide, and molybdenum oxide.

12. A method for manufacturing a nanostructure composite, the method comprising:

a step of doping pentavalent elements to a nanostructure and then forming doping points; and

a step of growing silica or calcium carbonate from the doping points of the nanostructure by clipping the nanostructure having the doping points into a precursor solution of silica or calcium carbonate to be grown,

wherein the step of the growth of silica or calcium carbonate is carried out at a room temperature.

13. A method for manufacturing a carbon nanotube composite on which silica or calcium carbonate is coated, the method comprising:

a step of doping a pentavalent elements to carbon nanotubes; and

a step of coating the doped carbon nanotubes with silica or calcium carbonate,

wherein the step of coating silica or calcium carbonate is progressed in such a manner that the carbon nanotubes on which the pentavalent elements are doped are dipped into a solution containing silica or calcium carbonate to be coated, and then maintained for the predetermined times.