Nanoparticles-containing composite porous body and method of making the porous body

• US 20060057355A1
• Filed: 10/17/2005
• Published: 03/16/2006
• Est. Priority Date: 06/12/2003
• Status: Abandoned Application

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Suzuki, Masa-aki, Kudoh, Yuji, Hashida, Takashi
• Application Number:
  US11/251,749
• Publication Number:
  US 20060057355A1
• Time in Patent Office: Days
• US Class Current: 428/308.400
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: C01B 37/00 Compounds having molecular sieve properties but not having base-exchange properties
• CPC Class Codes: C04B 2111/00008 Obtaining or using nanotechnology related materials
• CPC Class Codes: C04B 35/00 Shaped ceramic products characterised by their composition porous ceramic products C04B38/00; ceramic articles characterised by particular shape, see the relevant classes, e.g. linings for casting ladles, tundishes, cups or the like B22D41/02; ceramic substrates for microelectronic semi-conductors H01L23/15; Ceramics compositions containing free metal bonded to carbides, diamond, oxides, borides, nitrides, silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides or sulfides other than as macroscopic reinforcing agents C22C; shaping of ceramics B28B; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products chemical preparation of powders of inorganic compounds C01; infiltration of sintered ceramic preforms with molten metal C04B41/51
• CPC Class Codes: C04B 38/00 Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof treating slag with gases or gas generating material C04B5/06 ; expanded graphite C04B35/536
• CPC Class Codes: C04B 38/0635 Compounding ingredients C04B38/0615 takes precedence
• CPC Class Codes: Y10T 428/249958 Void-containing component is synthetic resin or natural rubbers
• CPC Class Codes: Y10T 428/249987 With nonvoid component of specified composition
• CPC Class Codes: Y10T 428/30 Self-sustaining carbon mass or layer with impregnant or other layer

Abstract

A nanoparticles-containing composite porous body according to the present invention includes a porous body having a solid skeleton and pores and nanoparticles of an inorganic substance. The nanoparticles are carried on the solid skeleton without coagulating together or being chemically bonded to the skeleton. The nanoparticles may be coated with organic aggregates and carried as composite particles on the solid skeleton. As the organic aggregates, spherical organic aggregates such as a spherical protein or a dendrimer are preferably used. Also, the organic aggregates may be decomposed and removed if necessary.

Claims

1. A nanoparticles-containing composite porous body comprising:

a porous body made of a dry gel, which has a pore ratio of 50% or more and which includes a solid skeleton and pores;

nanoparticles of an inorganic substance; and

organic aggregates made of a dendritic polymer,

wherein the nanoparticles are carried on the solid skeleton without coagulating together or being chemically bonded to the skeleton, and

wherein the organic aggregates coat the nanoparticles, thereby making composite particles, and

wherein the nanoparticles are carried on the solid skeleton by way of the organic aggregates.

2. The nanoparticles-containing composite porous body of claim 1, wherein the nanoparticles are carried inside the solid skeleton.

3. The nanoparticles-containing composite porous body of claim 2, wherein the organic aggregates are chemically bonded to the solid skeleton.

4. The nanoparticles-containing composite porous body of claim 2, wherein the organic aggregates have an ordered structure.

5. The nanoparticles-containing composite porous body of claim 4, wherein the organic aggregates are spherical organic aggregates.

6. The nanoparticles-containing composite porous body of claim 1, wherein the dendritic polymers are dendrimers.

7. The nanoparticles-containing composite porous body of claim 1, wherein the solid skeleton of the porous body defines a network structure.

8. The nanoparticles-containing composite porous body of claim 7, wherein the porous body is a dry gel of an inorganic oxide.

9. The nanoparticles-containing composite porous body of claim 8, wherein the porous body is a carbon porous body.

10. A method of making a nanoparticles-containing composite porous body, the method comprising the steps of:

providing organic aggregates;

preparing a material solution to make a porous body;

mixing the material solution and the organic aggregates together;

making the porous body of a dry gel, which has a pore ratio of 50% or more and which includes a solid skeleton and pores, from the material solution, the porous body including the organic aggregates that are dispersed; and

forming nanoparticles inside the organic aggregates included in the porous body.

11. The method of claim 10, further comprising the step of drying the porous body,

wherein the solid skeleton of the porous body is made of a carbon precursor, and

wherein the method further comprises the step of forming a carbon porous body by carbonizing the carbon precursor after the step of drying has been performed.

12. The method of claim 10, further comprising the step of decomposing the organic aggregates included in the porous body.

13. The method of claim 10, wherein the step of forming the nanoparticles includes the steps of preparing a precursor of the nanoparticles and transforming the precursor into the nanoparticles.

21. A nanoparticles-containing composite porous body made by the method of claim 10.

14. A method of making a nanoparticles-containing composite porous body, the method comprising the steps of:

providing a solution containing composite particles that include nanoparticles of an inorganic substance and organic aggregates coating the nanoparticles;

preparing a porous body made of a dry gel, which has a pore ratio of 50% or more and which includes a solid skeleton and pores; and

impregnating the porous body with the solution, thereby making the porous body have the composite particles dispersed.

15. The method of claim 14, further comprising the step of drying the porous body,

wherein the solid skeleton of the porous body is made of a carbon precursor, and

wherein the method further comprises the step of forming a carbon porous body by carbonizing the carbon precursor after the step of drying has been performed.

16. The method of claim 14, further comprising the step of decomposing the organic aggregates included in the porous body.

22. A nanoparticles-containing composite porous body made by the method of claim 14.

17. A method of making a nanoparticles-containing composite porous body, the method comprising the steps of:

providing a solution containing organic aggregates;

preparing a porous body made of a dry gel, which has a pore ratio of 50% or more and which includes a solid skeleton and pores;

impregnating the porous body with the solution, thereby making the porous body have the organic aggregates dispersed; and

forming nanoparticles inside the organic aggregates included in the porous body.

18. The method of claim 17, further comprising the step of drying the porous body,

wherein the solid skeleton of the porous body is made of a carbon precursor, and

wherein the method further comprises the step of forming a carbon porous body by carbonizing the carbon precursor after the step of drying has been performed.

19. The method of claim 17, further comprising the step of decomposing the organic aggregates included in the porous body.

20. The method of claim 17, wherein the step of forming the nanoparticles includes the steps of preparing a precursor of the nanoparticles and transforming the precursor into the nanoparticles.

23. A nanoparticles-containing composite porous body made by the method of claim 17.