Carbon-based fluorescent tracers as oil reservoir nano-agents
US-9493700-B2 · Nov 15, 2016 · US
Green production of highly fluorescent carbon quantum dots from carbon dioxide
US10011767B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10011767-B2 |
| Application number | US-201615196141-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 29, 2016 |
| Priority date | Jun 29, 2015 |
| Publication date | Jul 3, 2018 |
| Grant date | Jul 3, 2018 |
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Abstract
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A method of preparing fluorescent material containing carbon quantum dots, comprising milling a metal in the presence of carbon dioxide in a sealed container for a set duration to form the carbon quantum dots containing material. The carbon dioxide is preferably obtained as a waste gas from a human related activity such as an industrial process and may be provided in the form of dry ice.
First claim
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The invention claimed is: 1. A method of preparing fluorescent material containing carbon quantum dots, comprising: milling a metal in the presence of carbon dioxide in a sealed container for a set duration to form a carbon quantum dot containing material. 2. The method of claim 1 wherein the metal includes a metal wherein the enthalpy of formation of its metal oxide is higher than that of carbon dioxide. 3. The method of claim 2 wherein the metal is magnesium. 4. The method of claim 1 further comprises removing a metal oxide by-product from the material. 5. The method of claim 4 wherein the step of removing the metal oxide by-product from the material comprises washing the material with an acid. 6. The method of claim 5 wherein the weak acid is 1M HCl. 7. The method of claim of claim 5 further comprising drying the material. 8. The method of claim 1 wherein carbon dioxide is a waste gas obtained from an industrial process. 9. The method of claim 1 further comprising introducing a dopant containing an element selected from Group 13, 14, 15 or 16 or a combination thereof. 10. The method of claim 9 wherein introducing the dopant includes introducing a carbon compound form of the Group 16 element. 11. The method of claim 5 further comprising dialyzing the material.
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Classifications
Manufacture or treatment of nanostructures · CPC title
- C09K11/65Primary
containing carbon (in organic compounds C09K11/06) · CPC title
Optical properties, e.g. expressed in CIELAB-values · CPC title
Exhibiting three-dimensional carrier confinement, e.g. quantum dots · CPC title
Nano-sized carbon materials · CPC title
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- What does patent US10011767B2 cover?
- A method of preparing fluorescent material containing carbon quantum dots, comprising milling a metal in the presence of carbon dioxide in a sealed container for a set duration to form the carbon quantum dots containing material. The carbon dioxide is preferably obtained as a waste gas from a human related activity such as an industrial process and may be provided in the form of dry ice.
- Who is the assignee on this patent?
- Blair Richard, Siddhanti Deepti A, Nash David J, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C09K11/65. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jul 03 2018 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).