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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 9533284 B1

PDFFull Text
Date of Patent:
Jan. 03, 2017

Filed:

Feb. 15, 2012

Visible-light-responsive photocatalyst with environmental resistance

Applicants:

Kazuhiro Sayama, Ibaraki, JP;

Yoshinari Konishi, Ibaraki, JP;

Inventors:

Kazuhiro Sayama, Ibaraki, JP;

Yoshinari Konishi, Ibaraki, JP;

Assignee:

National Institute of Advanced Industrial Science and Technology, Tokyo, JP;

Attorney:

Carmody Torrance Sandak & Hennessey LLP

Primary Examiner:

Matthew E Hoban

Assistant Examiner:

James Fiorito

Int. Cl.
CPC ...
B01J 23/34 (2006.01); C11D 3/00 (2006.01); C11D 3/12 (2006.01); B01J 23/30 (2006.01); B01J 23/31 (2006.01); B01J 37/08 (2006.01); B01J 35/00 (2006.01); B01J 37/02 (2006.01); B01J 23/888 (2006.01); B01J 23/89 (2006.01); C23C 18/12 (2006.01); B01D 53/86 (2006.01);
U.S. Cl.
CPC ...
B01J 23/34 (2013.01); B01J 23/30 (2013.01); B01J 23/31 (2013.01); B01J 23/888 (2013.01); B01J 23/8993 (2013.01); B01J 35/004 (2013.01); B01J 37/0201 (2013.01); B01J 37/088 (2013.01); C11D 3/0063 (2013.01); C11D 3/1213 (2013.01); B01D 53/8668 (2013.01); B01D 2255/206 (2013.01); B01D 2255/2045 (2013.01); B01D 2255/2063 (2013.01); B01D 2255/2073 (2013.01); B01D 2255/20761 (2013.01); B01D 2255/20776 (2013.01); B01D 2255/20792 (2013.01); B01D 2257/708 (2013.01); C23C 18/1216 (2013.01);
Abstract

To provide a novel visible light-responsive photocatalyst or tungsten oxide visible light-responsive semiconductor improved in environmental resistance under an alkaline condition. The tungsten oxide visible light-responsive semiconductor unstable under an alkaline condition is improved in environmental resistance without losing photocatalytic function thereof by adding thereto at least one element selected from the group consisting of copper, tantalum, niobium, lanthanum, bismuth, calcium, chromium, manganese and zinc. The obtained environmental resistant visible light-responsive photocatalyst is subjected to an alkaline treatment to thereby be improved in photocatalytic activity.

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