Catalysts and related methods for photocatalytic production of H2O2 and thermocatalytic reactant oxidation

Patent metadata

Field	Value
Publication number	US-10508032-B2
Application number	US-201615073892-A
Country	US
Kind code	B2
Filing date	Mar 18, 2016
Priority date	Mar 20, 2015
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

Catalysts, catalytic systems and related synthetic methods for in situ production of H2O2 and use thereof in reaction with oxidizable substrates.

First claim

We claim:

1. A composition comprising a nanoparticulate TiO 2 core component, the nanoparticulate TiO 2 core component having a surface; a SiO 2 shell component coupled to and partially coating the surface of said core component; and transition metal moieties coupled to said shell component, said composition comprising pores comprising TiO 2 surface areas.

2. The composition of claim 1 wherein said transition metal moieties are selected from V, Ti, Cr, Mn, Co, Cu, Zn, Mo, Nb, Ta, W, Os, Re, Ir, and Sn moieties.

3. The composition of claim 2 wherein said transition metal moieties are Ti.

4. The composition of claim 1 wherein said SiO 2 shell component has a thickness dimension of about 1.5 nm to about 3.5 nm.

5. The composition of claim 4 wherein said transition metal moieties are Ti.

6. A composition comprising a nanoparticulate TiO 2 core component, the nanoparticulate TiO 2 core component having a surface; a porous SiO 2 shell component coupled to and partially coating the surface of said core component; and transition metal moieties coupled to said shell component, said composition comprising pores comprising TiO 2 surface areas.

7. The composition of claim 6 wherein said transition metal moieties are selected from V, Ti, Cr, Mn, Co, Cu, Zn, Mo, Nb, Ta, W, Os, Re, Ir, and Sn moieties.

8. The composition of claim 7 wherein said transition metal moieties are Ti.

9. The composition of claim 6 wherein said SiO 2 shell component has a thickness dimension of about 1.5 nm to about 3.5 nm.

10. The composition of claim 9 wherein said transition metal moieties are Ti.

11. A composition comprising a crystalline anatase nanoparticulate TiO 2 core component, the nanoparticulate TiO 2 core component having a surface; a porous SiO 2 shell component coupled to and partially coating the surface of said core component; and transition metal moieties coupled to said shell component, said composition comprising pores comprising TiO 2 surface areas.

12. The composition of claim 11 wherein said transition metal moieties are selected from V, Ti, Cr, Mn, Co, Cu, Zn, Mo, Nb, Ta, W, Os, Re, Ir, and Sn moieties.

13. The composition of claim 12 wherein said transition metal moieties are Ti.

14. The composition of claim 11 wherein said SiO 2 shell component has a thickness dimension of about 1.5 nm to about 3.5 nm.

15. The composition of claim 14 wherein said transition metal moieties are Ti.

16. The composition of claim 1 , wherein the transition metal moieties are grafted to the SiO 2 shell at dispersed sites.

17. The composition of claim 1 , wherein the transition metal moieties comprise transition metal cations.

18. The composition of claim 17 , wherein the transition metal moieties are thermocatalytically active for the epoxidation of an alkene in the presence of the alkene and H 2 O 2 .

19. The composition of claim 1 , where the transition metal moieties comprise tetrahedral Ti.

20. The composition of claim 16 , wherein the transition metal moieties comprise tetrahedral Ti and are thermocatalytically active for the epoxidation of an alkene in the presence of the alkene and H 2 O 2 .

Assignees

• Univ Northwestern

Inventors

• Gray Kimberly A
• Notestein Justin M
• Eaton Todd R

Classifications

• B01J37/34

  Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves {; Ionic sputtering; Flame or plasma spraying; Particle radiation} · CPC title

• B01J23/468

  Iridium · CPC title

• B01J23/466

  Osmium · CPC title

• B01J23/22

  Vanadium · CPC title

• B01J23/26

  Chromium · CPC title