Highly active photocatalyst particles, method of production therefor, and use thereof
US7582156B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2008 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Mar 1, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A coating agent which produces a film with photocatalytic properties, comprises composite photocatalyst particles of titanium dioxide and a compound inactive as a photocatalyst, and at least a binder. The photocatalyst particles achieve a ratio of decomposition of acetaldehyde (DWA) values of at least 80%. A BET specific surface area of the composite particles of titanium dioxide and a compound inactive as a photocatalyst is from 10 to 300 m2/g. The composite particles of titanium dioxide and a compound inactive as a photocatalyst are produced by a method comprising the steps of preparing a water based slurry of pH 3 to 5 comprising titanium dioxide, preparing a water based solution comprising a compound inactive as a photocatalyst, and reacting the slurry and the water based solution together at a pH of 4 to 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.