- Document Number:
20240132362
- Appl. No:
18/547818
- Application Filed:
February 28, 2022
- نبذة مختصرة :
Disclosed herein are compositions and methods that can achieve photoreduction of CO2 to CO in pure water at pH 6-7 with excellent performance parameters. In embodiments, the compositions and methods use CuInS2 colloidal quantum dots (QDs) as photosensitizers, and a Co-porphyrin catalyst.
- Claim:
1. A method of converting carbon dioxide to carbon monoxide, the method comprising: providing a reaction mixture comprising quantum dots, a cobalt(III) porphyrin compound, and a reducing agent, in water; adding carbon dioxide to the reaction mixture; and illuminating the reaction mixture with light.
- Claim:
2. The method of claim 1, wherein the quantum dots are core/shell quantum dots comprising a CuInS2 core and a ZnS shell.
- Claim:
3. The method of claim 1 or claim 2, wherein the quantum dots further comprise a capping molecule on the surface of the quantum dots.
- Claim:
4. The method of claim 3, wherein the capping molecule comprises a thiol moiety and an amine moiety.
- Claim:
5. The method of claim 4, wherein the capping molecule is 2-aminoethanethiol.
- Claim:
6. The method of any one of claims 1-5, wherein the quantum dots are present in the mixture at a concentration of about 1 μM to about 5 μM.
- Claim:
7. The method of any one of claims 1-6, wherein the cobalt(III) porphyrin compound is selected from [{meso-tetra(4-sulfonatophenyl)porphyrinato}cobalt(III)] and [{meso-tetra(4-carboxyphenyl)porphyrinato}cobalt(III)].
- Claim:
8. The method of any one of claims 1-7, wherein the cobalt(III) porphyrin compound is is present in the reaction mixture at a concentration of about 0.10 μM to about 5.0 μM.
- Claim:
9. The method of any one of claims 1-8, wherein the reducing agent is selected from sodium ascorbate, tris(carboxyethyl)phosphine, and a mixture thereof.
- Claim:
10. The method of any one of claims 1-9, wherein the reducing agent is present in the reaaction mixture at a concentration of about 5 mM to about 100 mM.
- Claim:
11. The method of any one of claims 1-10 wherein the reaction mixture does not comprise an organic solvent or a buffer.
- Claim:
12. The method of any one of claims 1-11, wherein the reaction mixture has a pH of about 6 to about 7.
- Claim:
13. The method of any one of claims 1-12, comprising illuminating the reaction mixture with light at a wavelength of about 450 nm.
- Claim:
14. The method of claim 13, comprising illuminating the reaction mixture with a 450-nm light-emitting diode.
- Claim:
15. The method of any one of claims 1-14, comprising illuminating the reaction mixture for about 18 hours to about 96 hours.
- Claim:
16. The method of any one of claims 1-15, wherein the reaction mixture is contained within a reaction vessel, and carbon dioxide is added to the reaction vessel at a pressure of about 1 atm.
- Claim:
17. A composition comprising: quantum dots comprising a CuInS2 core, a ZnS shell, and a capping molecule comprising an amino group; a cobalt(III) porphyrin compound; a reducing agent; and water.
- Claim:
18. The composition of claim 17, wherein the capping molecule is 2-aminoethanethiol.
- Claim:
19. The composition of claim 17 or claim 18, wherein the cobalt(III) porphyrin compound is selected from [{meso-tetra(4-sulfonatophenyl)porphyrinato}cobalt(III)] and [{meso-tetra(4-carboxyphenyl)porphyrinato}cobalt(III)].
- Claim:
20. The composition of any one of claims 17-19, wherein the reducing agent is selected from sodium ascorbate, tris(carboxyethyl)phosphine, and a mixture thereof.
- Claim:
21. The composition of any one of claims 17-20, further comprising carbon dioxide.
- Current International Class:
01; 01; 01; 01; 01; 09; 09
- الرقم المعرف:
edspap.20240132362
Processing Request
No Comments.