Process for producing crystalline tantalum oxide particles
US-2018044199-A1 · Feb 15, 2018 · US
Template-free tuned light driven photocatalyst and method
US11623211B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11623211-B2 |
| Application number | US-202016855824-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 22, 2020 |
| Priority date | Apr 26, 2019 |
| Publication date | Apr 11, 2023 |
| Grant date | Apr 11, 2023 |
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Abstract
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Described herein are methods of making the visible light photocatalysts without the use of templates that can comprise: (1) mixing a metal precursor, an alcohol, and a solvent to form a self assembled shapes at a temperature between the freezing point of the solvent and the boiling point of the solvent, (2) strengthening the shapes at a temperature of about 35° C. to about 300° C. for about 30 minutes to about 96 hours, and then (3) annealing the shapes at a temperature of between about 450° C. to about 750° C. for between about 4 hours to about 16 hours in a gaseous atmosphere. Also described are photocatalysts created by the described methods.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of making a tuned, light-activated photocatalyst without the use of templates comprising: (1) mixing a metal precursor, ethanol, and a solvent to form self-assembled shapes at a temperature between the freezing point of the solvent and the boiling point of the solvent, (2) strengthening the shapes at a temperature of about 35° C. to about 300° C. for about 30 minutes to about 96 hours, and then (3) annealing the shapes at a temperature of between about 450° C. to about 750° C. for between about 4 hours to about 16 hours in a gaseous atmosphere, where the step of mixing a solvent comprises mixing in water, where the volume ratio of ethanol to water is from about 1:2 to about 1:40. 2. The method of claim 1 , wherein the step of mixing a metal precursor comprises mixing a metal salt, a metal alkoxide, a metal halide, or a combination thereof. 3. The method of claim 2 , wherein the step of mixing a metal precursor comprises mixing a metal alkoxide. 4. The method of claim 3 , wherein the step of mixing a metal alkoxide comprises mixing tantalum alkoxide. 5. The method of claim 1 , wherein the volume ratio of ethanol to water is 2:5. 6. The method of claim 1 , wherein the volume ratio of ethanol to water is 1:20. 7. The method of claim 1 , wherein the step of strengthening the shapes is done at a temperature of 200° C. from 12 hours to 72 hours. 8. The method of claim 7 , wherein the step of strengthening the shapes is done at a temperature of 200° C. from 12 hours to 48 hours. 9. The method of claim 1 , wherein the step of annealing the shapes is done at 625° C. for 8 hours. 10. The method of claim 9 , wherein the step of annealing the shapes is done in a nitriding atmosphere. 11. The method of claim 10 , wherein the step of annealing the shapes is done in an ammonia atmosphere.
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Classifications
Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties · CPC title
Hollow spheres · CPC title
X-ray diffraction · CPC title
Scanning electron microscopy; Transmission electron microscopy · CPC title
Compounds characterised by their crystallite size · CPC title
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Frequently asked questions
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- What does patent US11623211B2 cover?
- Described herein are methods of making the visible light photocatalysts without the use of templates that can comprise: (1) mixing a metal precursor, an alcohol, and a solvent to form a self assembled shapes at a temperature between the freezing point of the solvent and the boiling point of the solvent, (2) strengthening the shapes at a temperature of about 35° C. to about 300° C. for about 30 …
- Who is the assignee on this patent?
- Univ California
- What technology area does this patent fall under?
- Primary CPC classification B01J37/08. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 11 2023 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).