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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.:

US 9604198 B1

PDFFull Text
Date of Patent:
Mar. 28, 2017

Filed:

Sep. 03, 2013

Visible light-responsive photocatalytic nanoparticle dispersion liquid, method for producing same, and member having photocatalytic thin film on surface

Applicant:

Shin-etsu Chemical Co., Ltd., Tokyo, JP;

Inventors:

Manabu Furudate, Kamisu, JP;

Tomohiro Inoue, Kamisu, JP;

Yoshitsugu Eguchi, Kamisu, JP;

Takashi Kobayashi, Kamisu, JP;

Assignee:

SHIN-ETSU CHEMICAL CO., LTD., Tokyo, JP;

Attorney:

Westerman, Hattori, Daniels & Adrian, LLP

Primary Examiner:

Anthony J Zimmer

Int. Cl.
CPC ...
B01J 23/72 (2006.01); B01J 21/06 (2006.01); B01J 23/22 (2006.01); B01J 23/28 (2006.01); B01J 23/835 (2006.01); B01J 23/847 (2006.01); B01J 23/887 (2006.01); B01J 37/04 (2006.01); B01J 37/08 (2006.01); B01J 37/34 (2006.01); C09D 1/00 (2006.01); C09D 5/00 (2006.01); C09D 7/12 (2006.01); C09D 183/10 (2006.01); C09D 201/00 (2006.01); B01D 53/86 (2006.01); B01J 35/00 (2006.01);
U.S. Cl.
CPC ...
B01J 23/72 (2013.01); B01D 53/8687 (2013.01); B01J 21/063 (2013.01); B01J 23/22 (2013.01); B01J 23/28 (2013.01); B01J 23/835 (2013.01); B01J 23/8472 (2013.01); B01J 23/8875 (2013.01); B01J 35/004 (2013.01); B01J 35/0006 (2013.01); B01J 37/04 (2013.01); B01J 37/08 (2013.01); B01J 37/345 (2013.01); C09D 1/00 (2013.01); C09D 5/00 (2013.01); C09D 7/12 (2013.01); C09D 183/10 (2013.01); C09D 201/00 (2013.01); B01D 2255/20707 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/802 (2013.01); B01D 2257/91 (2013.01); B01D 2257/93 (2013.01); B01D 2259/802 (2013.01);
Abstract

It is possible to obtain a visible light-responsive photocatalytic nanoparticle dispersion liquid containing copper-containing titanium oxide nanoparticles by subjecting an aqueous peroxotitanic acid solution containing a copper compound to hydrothermal reaction for crystallizing the aqueous solution by means of heat under high pressure. The visible light-responsive photocatalytic nanoparticle dispersion liquid thus obtained exhibits excellent dispersion stability of titanium oxide nanoparticles within a water-based dispersion medium even when left in a cold and dark indoor area for a long period of time, expresses photocatalytic activity even in visible light (400 to 800 nm) alone, and can easily create a photocatalytic thin film which is extremely transparent and exhibits excellent durability, and in which the state of copper coordination when exposed to heat or ultraviolet rays is stable and cannot be easily modified.

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