Contaminant-activated photocatalysis
US11439980B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2017 |
| Grant date | Sep 13, 2022 |
| Priority date | — |
| Expiry date | Mar 12, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K2003/2241
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A visible light photocatalyst coating includes a metal oxide that in the presence of a organic contaminate that absorbs at least some visible light or includes the metal oxide and an auxiliary visible light absorbent, where upon absorption of degradation of the organic contaminate occurs. Contaminates can be microbes, such as bacteria, viruses, or fungi. The metal oxide is nanoparticulate or microparticulate. The metal oxide can be TiO2. The coating can include an auxiliary dye having an absorbance of light in at least a portion of the visible spectrum. The coating can include a suspending agent, such as NaOH. The visible light photocatalyst coating can cover a surface of a device that is commonly handled or touched, such as a door knob, rail, or counter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.