Conductive circuit containing a polymer composition containing thermally exfoliated graphite oxide and method of making the same
US-2015173188-A1 · Jun 18, 2015 · US
Functionalized graphene sheets having high carbon to oxygen ratios
US9546092B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9546092-B2 |
| Application number | US-86630609-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 3, 2009 |
| Priority date | Feb 5, 2008 |
| Publication date | Jan 17, 2017 |
| Grant date | Jan 17, 2017 |
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Abstract
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Functionalized graphene sheets having a carbon to oxygen molar ratio of at least about 23:1 and method of preparing the same.
First claim
Opening claim text (preview).
The invention claimed is: 1. Functionalized graphene sheets having a carbon to oxygen molar ratio of at least about 23:1 and comprising fully exfoliated single sheets of graphene, and wherein the functionalized graphene sheets are dry. 2. The functionalized graphene sheets of claim 1 , wherein the carbon to oxygen ratio is at least about 28:1. 3. The functionalized graphene sheets of claim 1 , wherein the carbon to oxygen ratio is at least about 50:1. 4. The functionalized graphene sheets of claim 1 , wherein the carbon to oxygen ratio is at least about 75:1. 5. The functionalized graphene sheets of claim 1 further comprising functionalized graphene sheets having a surface area of between about 350 and about 2400 m 2 /g. 6. The functionalized graphene sheets of claim further comprising functionalized graphene sheets having a surface area of between about 400 and about 2400 m 2 /g. 7. The functionalized graphene sheets of claim 1 further comprising functionalized graphene sheets having a surface area of between about 500 and about 2400 m 2 /g. 8. The functionalized graphene sheets of claim 1 further comprising functionalized graphene sheets having a surface area of between about 800 and about 2400 m 2 /g. 9. A method for making functionalized graphene sheets as claimed in claim 1 , comprising heating graphite oxide and/or functionalized graphene sheets having a carbon to oxygen ratio of less than about 23:1 at a temperature of at least about 750° C. for a time sufficient to generate functionalized graphene sheets having a carbon to oxygen molar ratio of at least about 23:1 wherein the functionalized graphene sheets comprise fully exfoliated single sheets of graphene and wherein the functionalized graphene sheets are dry. 10. The method of claim 9 , wherein the temperature is at least about 850° C. and the heating time is at least about 2 minutes. 11. The method of claim 9 , wherein the temperature is at least about 950° C. and the heating time is at least about 2 minutes. 12. The method of claim 9 , wherein the heating time is at least 15 minutes. 13. The method of claim 9 , wherein the heating is conducted in an inert atmosphere. 14. The method of claim 9 , wherein the heating is conducted in a reducing atmosphere.
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Manufacture or treatment of nanostructures · CPC title
Electronic properties · CPC title
Size or surface area · CPC title
- C01B31/0476Primary
Chemistry & Metallurgy · mapped topic
Purity · CPC title
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- What does patent US9546092B2 cover?
- Functionalized graphene sheets having a carbon to oxygen molar ratio of at least about 23:1 and method of preparing the same.
- Who is the assignee on this patent?
- Aksay Ilhan A, Milius David L, Korkut Sibel, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C01B31/0476. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 17 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).