LED photocatalyst module using photocatalyst

Patent metadata

Field	Value
Publication number	US-9744257-B2
Application number	US-201415022560-A
Country	US
Kind code	B2
Filing date	Sep 4, 2014
Priority date	Sep 26, 2013
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

The present invention relates to an LED photocatalyst module comprising: a light supplying unit for irradiating light onto a photocatalyst so that the photocatalyst is activated; a photocatalyst purifying unit disposed spaced apart from the light supplying unit and purifying polluted air; and a discharging unit disposed spaced apart from the photocatalyst purifying unit and sucking in the air purified by the photocatalyst purifying unit and discharging the air to the outside, wherein the photocatalyst purifying unit includes a ceramic honeycomb structure in which a plurality of photocatalyst pores, coated with the photocatalyst, are combined in a honeycomb pattern, and the photocatalyst includes a porous metal oxide film and metal particles formed on a surface of the porous metal oxide film.

First claim

The invention claimed is:

1. A light-emitting diode (LED) photocatalyst module comprising:
a light supplying unit for irradiating light onto a photocatalyst so that the photocatalyst is activated;
a photocatalyst purifying unit being disposed spaced apart from the light supplying unit and purifying polluted air; and
a discharging unit being disposed spaced apart from the photocatalyst purifying unit and sucking in the air purified by the photocatalyst purifying unit and discharging the air to the outside,
wherein the photocatalyst purifying unit includes a ceramic honeycomb structure in which a plurality of photocatalyst pores, coated with the photocatalyst, are combined in a honeycomb pattern,
wherein the photocatalyst includes a porous metal oxide film and metal particles formed on a surface of the porous metal oxide film, and
wherein the porous metal oxide film comprises tungsten oxide.

2. The LED photocatalyst module of claim 1 , wherein the metal oxide film further includes at least one metal oxide selected from the group consisting of titanium oxide, zinc oxide, niobium oxide, and combinations thereof.

3. The LED photocatalyst module of claim 1 , wherein the metal particle includes at least one selected from the group consisting of tungsten, chromium, vanadium, molybdenum, copper, iron, cobalt, manganese, nickel, platinum, gold, silver, cerium, cadmium, zinc, magnesium, calcium, strontium, barium, and combinations thereof.

4. The LED photocatalyst module of claim 1 , wherein the porous metal oxide film has a porosity of 5% to 50%.

5. The LED photocatalyst module of claim 1 , wherein the porous metal oxide film has a specific surface area of 50 m 2 /g to 500 m 2 /g.

6. The LED photocatalyst module of claim 1 , wherein the metal particles have a content of 0.0001 mg to 0.01 mg per 1 cm 2 of a plane of the porous metal oxide film.

7. The LED photocatalyst module of claim 1 , wherein the metal particles have a content of 0.01 wt % to 10 wt % relative to 100 wt % of the photocatalyst.

8. The LED photocatalyst module of claim 1 , wherein the ceramic honeycomb structure has a porosity of 50% to 80%.

9. The LED photocatalyst module of claim 1 , wherein the light supplying unit includes an emitter formed of a light-emitting diode (LED).

10. The LED photocatalyst module of claim 1 , wherein the discharging unit includes:
a discharging plate through which a plurality of through holes are formed; and
a discharging fan formed in the bottom of the discharging plate, which sucks in the purified air and discharges the air through the discharging plate.

11. The LED photocatalyst module of claim 1 , comprising: a power supplying unit for supplying power so as to control the light supplying unit, the photocatalyst purifying unit, and the discharging unit.

12. The LED photocatalyst module of claim 1 , wherein the LED photocatalyst module has a hazardous gas removal rate of 80% to 90%.

13. The LED photocatalyst module of claim 12 , wherein the hazardous gas is at least one selected from the group consisting of volatile organic compounds (VOCs), perfluorocarbons (PFCs), chlorofluorocarbons (CFCs), trichloroethylene (TCE), dioxin, and nitrogen oxide.

Assignees

• Lg Hausys Ltd

Inventors

• Lee Dong-Il
• Seo Joo-Hwan
• Jung Seong-Moon

Classifications

• B01J35/57

  Honeycombs · CPC title

• B01J23/28

  Molybdenum · CPC title

• B01J23/34

  Manganese · CPC title

• B01J23/22

  Vanadium · CPC title

• B01J23/42

  Platinum · CPC title