Photocatalytic process using hydrophilifiable material

Details Photocatalytic process using hydrophilifiable material Photocatalytic process using hydrophilifiable material

2003-07-23

2011-10-11

Johnson, Edward (Department: 1736)

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

C423S239100

Reexamination Certificate

active

08034309

ABSTRACT:
In a formulation comprising titanium dioxide as a photocatalyst and an amphoteric metal oxide (alumina or the like) or a basic metal oxide (barium oxide, strontium oxide or the like) as a material having a base point, when a nitrogen oxide (nitrogen monoxide) comes into contact with or approaches titanium dioxide, upon exposed to light, the carbon monoxide is oxidized to nitrogen dioxide (gas) by hydroxy radicals as an active oxygen species produced by titanium dioxide. As is apparent from the molecular structure, nitrogen dioxide is an acidic gas, alumina is an amphoteric metal oxide, and barium oxide and strontium oxide are a basic metal oxide. The oxygen atom thereof serves as a base point to an acid gas. Therefore, nitrogen dioxide is attracted and chemically bonded to the oxygen atom, held on the metal oxide, and kept close to titanium dioxide as the photocatalyst.

REFERENCES:
patent: 5854708 (1998-12-01), Komatsu et al.
patent: 6013372 (2000-01-01), Hayakawa et al.
patent: 6620385 (2003-09-01), Fujii
patent: 0590477 (1994-04-01), None
patent: 0684075 (1995-11-01), None
patent: 0780158 (1997-06-01), None
patent: 0866101 (1998-09-01), None
patent: 0913447 (1999-05-01), None
patent: 0923988 (1999-06-01), None
patent: 03073304 (1991-03-01), None
patent: 9075748 (1997-03-01), None
patent: 11060281 (1999-03-01), None
patent: 11131261 (1999-05-01), None
Communication from European Patent Office dated Jul. 3, 2003, enclosing European Search Report for EPO 03005425.8-2104.
Office Action from Japanese Patent Office, issued Mar. 26, 2004 in Japanese language, for Japanese Application No. H09-362078.

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