Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Reexamination Certificate
2007-02-13
2007-02-13
Le, H. Thi (Department: 1773)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
C428S702000
Reexamination Certificate
active
10663769
ABSTRACT:
The invention provides titanium dioxide fine particles, wherein nitrogen and at least one element selected from carbon, hydrogen, sulfur doped in titanium dioxide by heat-treating fine particles of a material of titanium dioxide at 500° C. or more and 600° C. or less in a reducing gas atmosphere containing nitrogen. The titanium fine particles exhibit a high photocatalytic activity than in the conventional art by irradiating a visible light such that they exhibit an isopropanol oxidation activity induced by visible light irradiation with a wavelength of 400 nm or more and 600 nm or less with excellent stability and durability of the photocatalytic activity.
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Ishii Tatsuya
Ito Yugo
Kondo Hiroyuki
Shimai Shunzo
Tokuoka Fumio
Foley & Lardner LLP
Le H. Thi
Toshiba Ceramics Co. Ltd.
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