Photocatalytic process
First Claim
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1. A photocatalytic cleaner for air or water, comprising:
- a photocatalytic material coating a substrate;
an anode, positioned a predetermined distance from the substrate, comprising a phosphor adapted to emit ultraviolet light in response to bombardment by electrons; and
a field emission cathode, positioned a predetermined distance from the anode, operable for emitting electrons in response to an electric field.
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Abstract
A photocatalytic cleaner for air or water includes a photocatalytic material coating a substrate. An anode, positioned a predetermined distance from the substrate, includes a phosphor that emits ultraviolet light in response to bombardment by electrons from a field emission cathode emitting electrons in response to an electric field. The field emission cathode may be a carbon based field emitter material including incorporating carbon nanotubes.
23 Citations
17 Claims
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1. A photocatalytic cleaner for air or water, comprising:
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a photocatalytic material coating a substrate; an anode, positioned a predetermined distance from the substrate, comprising a phosphor adapted to emit ultraviolet light in response to bombardment by electrons; and a field emission cathode, positioned a predetermined distance from the anode, operable for emitting electrons in response to an electric field. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A photocatalytic apparatus comprising:
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a photocatalytic material; an anode, positioned a predetermined distance from the photocatalytic material, comprising a phosphor adapted to emit ultraviolet light in response to bombardment by electrons; and a field emission cathode, positioned a predetermined distance from the anode, operable for emitting electrons in response to an electric field towards the phosphor. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for cleaning a fluid comprising:
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activating a field emitter with an electric field so that the field emitter emits electrons towards a phosphor; the phosphor emitting ultraviolet light in response to bombardment by the electrons emitted by the field emitter; a photocatalytic material activated by bombardment by the ultraviolet light emitted by the phosphor; and passing the fluid in contact with the photocatalytic material. - View Dependent Claims (16, 17)
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Specification