Crystal of 6,7-unsaturated-7-carbamoyl morphinan derivative and method for producing the same
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Photocatalytic compositions and methods for their preparation and use
US9821296B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9821296-B2 |
| Application number | US-201214407757-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 12, 2012 |
| Priority date | Jun 14, 2012 |
| Publication date | Nov 21, 2017 |
| Grant date | Nov 21, 2017 |
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- Title
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Abstract
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A photocatalytic composition is disclosed that includes a silver halide in combination with one or more rare earth elements. The composition may be used for the photocatalytic degradation of pollutants.
First claim
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What is claimed is: 1. A photocatalyst comprising a silver halide combined with one or more rare earth elements selected from the group consisting of Sc, Y, La, Ce, Pm, Sm, Eu, Gd, Dy, Ho, Tm, Yb, and Lu, wherein the photocatalyst has activity as a UV or a visible light photocatalyst, and wherein the elements have a weight % of about 1% to about 5%. 2. The photocatalyst of claim 1 , wherein the one or more rare earth elements is selected from the group consisting of Ce, Sm, and Eu. 3. The photocatalyst of claim 1 , wherein a cycle life of the photocatalyst is at least about 20% greater than a cycle life of the silver halide without the rare earth element(s). 4. The photocatalyst of claim 1 , wherein a cycle life of the photocatalyst is at least about 6 cycles. 5. The photocatalyst of claim 1 , wherein a light trapping property of the photocatalyst is about 5% to about 15% greater than a light trapping property of the silver halide without the rare earth element(s). 6. The photocatalyst of claim 1 , wherein a separation of photo-generated electron-holes of the photocatalyst is greater than a separation of photo-generated electron-holes of the silver halide without the rare earth element(s). 7. The photocatalyst of claim 1 , wherein a separation of photo-generated electron-holes of the photocatalyst is about 5% to about 15% greater than a separation of photo-generated electron-holes of the silver halide without the rare earth element(s). 8. The photocatalyst of claim 1 , wherein the photocatalyst has a degradation efficiency of at least about 70%. 9. The photocatalyst of claim 1 , wherein molar ratio of the rare earth element to the silver halide is about 0.01% to about 10%.
Assignees
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Classifications
Organic compounds · CPC title
of rare earths · CPC title
by catalytic oxidation · CPC title
Liquid · CPC title
Cartridges · CPC title
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Frequently asked questions
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- What does patent US9821296B2 cover?
- A photocatalytic composition is disclosed that includes a silver halide in combination with one or more rare earth elements. The composition may be used for the photocatalytic degradation of pollutants.
- Who is the assignee on this patent?
- Zhao Chongjun, Shao Zhen, Xia Yang, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification B01J27/10. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 21 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).