The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2007
Filed:
Sep. 17, 2003
Zhonghua Zhou, Hadano, JP;
Fumio Tokuoka, Hadano, JP;
Yugo Ito, Machida, JP;
Tatsuya Ishii, Machida, JP;
Shunzo Shimai, Tougane, JP;
Hiroshi Yamaguchi, Kawasaki, JP;
Hiroyuki Kondo, Sagamihara, JP;
Zhonghua Zhou, Hadano, JP;
Fumio Tokuoka, Hadano, JP;
Yugo Ito, Machida, JP;
Tatsuya Ishii, Machida, JP;
Shunzo Shimai, Tougane, JP;
Hiroshi Yamaguchi, Kawasaki, JP;
Hiroyuki Kondo, Sagamihara, JP;
Toshiba Ceramics Co., Ltd., Tokyo, JP;
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.