High surface area carbon opals and inverse opals obtained therefrom

Patent metadata

Field	Value
Publication number	US-9643894-B2
Application number	US-201213526395-A
Country	US
Kind code	B2
Filing date	Jun 18, 2012
Priority date	Jun 18, 2012
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

A self-assembled carbon structure such as a carbon opal is disclosed herein. The structure is composed of hydrophilic carbon spheres oriented in a periodic colloidal crystal structure, wherein the carbon spheres have a porous surface, wherein the carbons spheres have an average particle diameter less than 3000 nm. Also disclosed is an inverse opal structure that includes a plurality of voids in the structural material. The voids are regularly arranged in an ordered periodic structure, the voids having a spherical shape. The inverse opal structure has a specific surface area greater than 100 m 2 /g and method for making the same together with materials that employ the same.

First claim

What is claimed is:

1. A self-assembled carbon structure comprising:
functionalized monodispersed starburst carbon spheres (MSCS) oriented in a three-dimensional colloidal crystal, wherein the MSCS have a porous surface and a zeta potential of about −46 mV, wherein the carbons spheres have an average diameter less than 3000 nm.

2. The self-assembled carbon structure of claim 1 wherein the MSCS have an average pore size between 1.0 nm and 20.0 nm.

3. The self-assembled carbon structure of claim 1 wherein the MSCS have an average pore size between 1.0 nm and 10.0 nm.

4. The self-assembled carbon structure of claim 1 wherein the MSCS have an average diameter less than 500 nm.

5. The self-assembled carbon structure of claim 2 wherein the MSCS have an average diameter between 120 nm and 1400 nm.

6. The self-assembled carbon structure of claim 1 wherein the structure comprises at least two layers of MSCS oriented in a three-dimensional periodic colloidal crystal structure.

7. The self-assembled carbon structure of claim 1 wherein the MSCS have an average pore size less than 2.5 nm.

8. The self-assembled carbon structure of claim 1 wherein the MSCS have an average pore size between 1.5 nm and 2.5 nm.

9. The self-assembled carbon structure of claim 8 wherein the pores on the MSCS are ordered in an orientation of cubic, hexagonal or mixture thereof.

10. The self-assembled carbon structure of claim 8 wherein the pores on the MSCS are present in irregular order.

11. The self-assembled carbon structure of claim 1 wherein the MSCS have an average surface area greater than 500 m 2 /g.

12. The self-assembled carbon structure of claim 1 wherein the MSCS have an average pore size less than 2.5 nm and an average surface area that is greater than 800 m 2 /g.

13. The self-assembled carbon structure of claim 12 wherein the average surface area is greater than 1000 m 2 /g.

14. The self-assembled carbon structure of claim 12 further comprising a deposition material conformably deposited on the MSCS, the deposition material comprising at least one of a metal, a chalcogenide, an inorganic oxide, an inorganic nitride, and a Group II-VI compound semiconductor material.

15. The self-assembled carbon structure of claim 14 wherein each monodispersed starburst carbon sphere has an outer surface having a plurality of pores on the outer surface and wherein the deposition material comprises at least one metal or metal oxide selected from the group consisting of hafnium, aluminum, nickel, tungsten gold, silver, silicon, platinum, cobalt, chromium, titanium, molybdenum, and mixtures thereof, wherein at least a portion of the deposition product is present in the pores.

16. The self-assembled carbon structure of claim 15 wherein the MSCS have an average pore size between 1.5 and 1.9 nm and an average diameter between 200 nm and 500 nm, the deposition material projecting into the pores to a depth of at least 25% of an average sphere radius.

17. The self-assembled carbon structure of claim 15 wherein the MSCS have a pore volume between 0.20 mL/g and 1.6 mL/g.

18. A self-assembled carbon structure composed of comprising:
monodispersed starburst carbon spheres (MSCS) oriented in a periodic colloidal crystal structure, wherein the carbon spheres have an average particle diameter less than 3000 nm, an average pore size between 1.0 nm and 10 nm, the MSCS having carbon-oxygen bonds present at a percentage of about 8% of combined carbon-oxygen and carbon-carbon bonds as determined by x-ray photoelectron spectroscopy.

19. The self-assembled carbon structure of claim 18 wherein the periodic colloidal crystal comprises at least two layers of MSCS oriented in a three-dimensional periodic structure.

20. The self-assembled carbon structure of claim 18 wherein the MSCS have an average surface area greater than 1000 m 2 /g.

21. The self-assembled carbon structure of claim 18 wherein the MSCS have a zeta potential more negative than −15 m/V.

22. The self-assembled carbon structure of claim 18 further comprising a deposition material deposited in the pores of the MSCS, the deposition material comprising at least one of a metal, a chalcogenide, and an inorganic oxide wherein the deposition material is present at a depth of at least 25% of an average radius of the MSCS.

23. The self-assembled carbon structure of claim 22 wherein the deposition material is at least one metal or metal oxide selected from the group consisting of hafnium, aluminum, nickel, tungsten, gold, silver, silicon, platinum, cobalt, chromium, titanium, molybdenum, and mixtures thereof.

Assignees

• Yano Kazuhisa
• Goodman Matthew Dave
• Braun Paul Vannest
• Toyota Motor Eng & Mfg North America Inc
• Univ Illinois

Inventors

• Yano Kazuhisa
• Goodman Matthew Dave
• Braun Paul Vannest

Classifications

• C04B2235/5445

  submicron sized, i.e. from 0,1 to 1 micron · CPC title

• B82B3/0033

  Manufacture or treatment of substrate-free structures, i.e. not connected to any support · CPC title

• B82B1/001

  Devices without movable or flexible elements · CPC title

• Y10T428/2982

  Particulate matter [e.g., sphere, flake, etc.] · CPC title

• B32B9/00

  Layered products comprising a {layer of a} particular substance not covered by groups B32B11/00 - B32B29/00 · CPC title