Claims
- 1. A magnetic photocatalyst composite particle, comprising:
a magnetic composition, and at least one photocatalyst particle secured to said magnetic composition.
- 2. The magnetic photocatalyst composite particle of claim 1, wherein said photocatalyst particles are nano-sized.
- 3. The magnetic photocatalyst composite particle of claim 2, wherein said nano-sized photocatalyst particles are substantially uniformly distributed on a surface of said magnetic composition.
- 4. The magnetic photocatalyst composite particle of claim 2, further comprising a protective layer disposed on said magnetic composition for preventing chemical attack of said magnetic composition.
- 5. The magnetic photocatalyst composite particle of claim 2, wherein said nano-sized photocatalytic particles are selected from the group consisting of TiO2, ZnO and Fe2O3.
- 6. The magnetic photocatalyst composite particle of claim 1, wherein said magnetic composition is at least one selected from the group consisting of Fe3O4, Fe2O3, BaO(Fe2O3)6, SrO(Fe2O3)6 and AlNiCo.
- 7. A magnetic photocatalyst composite particle, comprising:
a substrate core, and at least one nano-sized photocatalyst particle and at least one nano-sized magnetic particle, said nano-sized particles disposed on said substrate core.
- 8. The magnetic photocatalyst composite particle of claim 7, wherein said nano-sized photocatalytic particles are formed from at least one selected from the group consisting of TiO2, ZnO and Fe2O3.
- 9. The magnetic photocatalyst composite particle of claim 7, wherein said substrate core is at least one selected from the group consisting of Fe3O4, Fe2O3, BaO(Fe2O3)6, SrO(Fe2O3)6 and AlNiCo.
- 10. A chemical reactor, comprising:
a photocatalytic fluidized bed comprising a plurality of magnetic photocatalyst composite particles, said magnetic photocatalyst composite particles comprising a magnetic composition and at least one photocatalyst particle secured to said magnetic composition; and structure for creating turbulence for mixing.
- 11. The reactor of claim 10, wherein said photocatalyst particles are nano-sized.
- 12. The reactor of claim 11, wherein said magnetic photocatalytic composite particles are at least one selected from the group consisting of a first particle type having a magnetic composition and at least one nano-sized photocatalyst particle secured to said magnetic composition, and a second particle type having a substrate core and at least one nano-sized photocatalyst particle and at least one nano-sized magnetic particle secured to said substrate core.
- 13. A photocatalyst fluidized bed, comprising:
a plurality of magnetic photocatalyst composite particles, said magnetic photocatalyst composite particles comprising a magnetic composition and at least one photocatalyst particle secured to said magnetic composition; and structure for creating turbulence for mixing.
- 14. The photocatalyst fluidized bed of claim 13, wherein said photocatalyst particles are nano-sized.
- 15. The photocatalyst fluidized bed of claim 14, wherein said structure for creating turbulence includes at least one magnetic field source.
- 16. A method for performing photocatalysis, comprising the steps of:
providing magnetic photocatalyst composite particles in a fluidized bed; supplying light and a material to be purified intermixed with reactant particles to said fluidized bed; and applying a magnetic field to influence movement of said photocatalyst composite particles to increase mixing between said photocatalyst composite particles and said reactant particles.
- 17. The method of claim 16, wherein said magnetic photocatalyst composite particles include nano-sized photocatalyst particles.
- 18. The method for performing photocatalysis of claim 17, further comprising the step of varying at least one selected from the group consisting of magnetic field strength and magnetic field direction.
- 19. The method for performing photocatalysis of claim 16, further comprising the step of varying the intensity of said light.
- 20. The method for performing photocatalysis of claim 16, wherein said material to be purified is water.
- 21. The method for performing photocatalysis of claim 16, wherein said material to be purified is air.
- 22. A method for controlling pollution, comprising the steps of:
providing a plurality of magnetic photocatalyst composite particles, said magnetic photocatalyst composite particles being at least one selected from the group consisting of a first particle type having a magnetic composition, and at least one nano-sized photocatalyst particle secured to said magnetic composition, and a second particle type having a substrate core and at least one nano-sized photocatalyst particle and at least one nano-sized magnetic particle secured to said substrate core, and applying a magnetic field to influence movement of said particles.
- 23. A process for forming magnetic photocatalyst composite particles, comprising the steps of:
providing a plurality of magnetic substrate particles, a plurality of nano-sized photocatalyst particles and a coating machine, said coating machine having a rotor and a vessel and a volume therebetween, said volume including a region with a narrow rotor clearance relative to other volumes between said vessel and said rotor; positioning said plurality of magnetic substrate particles and nano-sized photocatalyst particles in a volume between a vessel and a rotor, and rotating said rotor, wherein said nano-sized photocatalyst particles coat said magnetic substrate particles.
- 24. A process for forming magnetic photocatalyst composite particles, comprising the steps of:
providing a plurality of magnetic substrate particles, a plurality of photocatalyst particles and at least one oxidizing acid, dissolving said photocatalyst particles in said acid to form a solution, and removing said acid, wherein a plurality of photocatalyst particles are deposited on the surface of said magnetic substrate particles.
- 25. The method of claim 24, wherein said deposited photocatalyst particles are nano-sized.
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit of U.S. Provisional Application No. 60/296,524 entitled “PHOTOCATALYST COATED MAGNETIC COMPOSITE PARTICLE” filed Jun. 6, 2001, the entirety of which is incorporated herein by reference.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
[0002] This invention was made with U.S. Government support through Cooperative Agreement No. NCC 9-110 awarded by the National Aeronautics and Space Administration (NASA). The U.S. Government may have certain rights in the invention.
Provisional Applications (1)
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Number |
Date |
Country |
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60296524 |
Jun 2001 |
US |