Titanium dioxide photocatalyst containing carbon and method...

Details Titanium dioxide photocatalyst containing carbon and method... Titanium dioxide photocatalyst containing carbon and method...

2005-04-01

2009-11-10

Bos, Steven (Department: 1793)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S349000, C423S610000, C423S614000, C423S44500R, C427S215000

Reexamination Certificate

active

07615512

ABSTRACT:
The invention relates to a titanium dioxide-based photocatalyst containing carbon that is highly photoactive in visible light (vlp-TiO2) and to a method of manufacture. The vlp-TiO2is manufactured by mixing a fine grained titanium compount (BET≧50 m2/g) with an organic carbon compound and subsequent thermal treatment at temperatures up to 350° C. The carbon content amounts to 0.05 to 4% by weight, preferably 0.4 to 0.8% by weight. The product is characterized by an ESR spectrum which displays only one significant signal in the g value range from 1.97 to 2.05 at g about 2.003. The inventive photocatalyst can be used for to degrade contaminants and pollutants in liquids and gases.

REFERENCES:
patent: 2448683 (1948-09-01), Peterson
patent: 4161389 (1979-07-01), Staffin et al.
patent: 5484757 (1996-01-01), Szymanski et al.
patent: 0 498122 (1992-08-01), None
patent: 0 963789 (1999-12-01), None
patent: 1022621 (1996-04-01), None

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