Self-Disinfecting Photocatalyst Sheet
AssigneeAleddra Inc.
InventorsChia-Yiu Maa, Chun-Te Yu
Life of this patent
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Abstract
A self-disinfecting photocatalyst sheet includes a substrate material and a photocatalyst layer with a primary photocatalyst and a secondary photocatalyst. The primary photocatalyst is a metal oxide photocatalyst, whereas the secondary photocatalyst is a metallic photocatalyst. The primary photocatalyst forms a covalent bond with the substrate material. The self-disinfecting photocatalyst sheet is activatable by a visible light and can self-disinfect against bacteria and viruses. A method of manufacturing the self-disinfecting photocatalyst sheet and means for alerting the user on the expiration of the self-disinfecting photocatalyst sheet are also presented.
Claims18
A self-disinfecting photocatalyst sheet, comprising
- a substrate material with a first side and a second side opposite the first side;
- and
- a photocatalyst layer comprising a primary photocatalyst and a secondary photocatalyst,
- wherein:
- the primary photocatalyst comprises a metal oxide photocatalyst,
- the secondary photocatalyst comprises a metallic photocatalyst,
- a mass ratio of the primary photocatalyst to the secondary photocatalyst is between 10:1 to 100:1, and
- the primary photocatalyst forms a covalent bond with the substrate material at a molecular level on the first side of the substrate material.
A method for producing a self-disinfecting photocatalyst sheet, comprising:
- forming the self-disinfecting photocatalyst sheet having a substrate material with a first side and a second side opposite the first side and a photocatalyst layer, with the photocatalyst layer comprising a primary photocatalyst and a secondary photocatalyst, by performing:
- applying a low-temperature air atmospheric plasma to the first side of the substrate material to improve a hydrophilic property of the substrate material;
- spraying a water-based photocatalyst solution on the first side of the substrate material, wherein the water-based solution comprises greater than 98 wt % in water, less than 2 wt % in the primary photocatalyst and secondary photocatalyst, and a mass ratio of the primary photocatalyst to the secondary photocatalyst is between 10:1 to 100:1;
- performing a heat curing process to create a hydroxyl group out of the primary photocatalyst to form a covalent bond with the substrate material on the first side of the substrate material;
- and
- coating an adhesive layer on the second side of the substrate material.
Dependencies are inferred from the claim text.