Method for producing tungsten trioxide powder for...

Details Method for producing tungsten trioxide powder for... Method for producing tungsten trioxide powder for...

2011-08-23

2011-08-23

Hailey, Patricia L (Department: 1732)

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C423S053000, C148S097000, C148S222000, C148S513000, C427S569000, C427S576000, C427S580000, C427S596000

Reexamination Certificate

active

08003563

ABSTRACT:
A method for producing a tungsten trioxide powder for a photocatalyst according to the present invention is characterized by comprising a sublimation step for obtaining a tungsten trioxide powder by subliming a tungsten metal powder or a tungsten compound powder by using inductively coupled plasma process in an oxygen atmosphere, and a heat treatment step for heat-treating the tungsten trioxide powder obtained in the sublimation step at 300° C. to 1000° C. for 10 minutes to 2 hours in an oxidizing atmosphere. A tungsten trioxide powder which is obtained by the method for producing a tungsten trioxide powder for a photocatalyst according to the present invention has excellent photocatalytic performance under visible light.

REFERENCES:
patent: 5613998 (1997-03-01), Seegopaul et al.
patent: 5984997 (1999-11-01), Bickmore et al.
patent: 6832735 (2004-12-01), Yadav et al.
patent: 6841142 (2005-01-01), Tenne et al.
patent: 2002/0016250 (2002-02-01), Hayakawa et al.
patent: 2005/0025700 (2005-02-01), Bulian et al.
patent: 2007/0177372 (2007-08-01), Matsuda et al.
patent: 2009/0023583 (2009-01-01), Nakano et al.
patent: 2010/0204040 (2010-08-01), Nakano et al.
patent: 2010/0204041 (2010-08-01), Nakano et al.
patent: 2010/0292075 (2010-11-01), Nakano et al.
patent: 61 242902 (1986-10-01), None
patent: 2 6339 (1990-01-01), None
patent: 4 37610 (1992-02-01), None
patent: 9 249542 (1997-09-01), None
patent: 2001 152130 (2001-06-01), None
patent: 2002 293544 (2002-10-01), None
patent: 2006 102737 (2006-04-01), None
patent: 2008 6429 (2008-01-01), None
patent: 2007/088891 (2007-08-01), None
“Preparation and characterization of doped WO3 photocatalyst powders,” M. Ashokkumar et al. Journal of Materials Science Letters 24 (1989), pp. 2135-2139.
“Synthesis and characterization of tungsten and tungsten oxide nanostructured films,” F. DiFonzo et al. Catalysis Today 116 (2006), pp. 69-73.
“Production of photo-catalyst TiO2 and high-temperature phase WO3 ultra-fine particles by DC arc discharge,” Y. Guo et al. Journal of Crystal Growth 275 (2005), pp. e2031-e2036.
“Nanocrystalline tungsten oxide thick-films with high sensitivity to H2S at room temperature,” J. L. Solis et al. Sensors and Actuators B 77 (2001), pp. 316-321.
“Oxygen partial pressure effect on the preparation of nanocrystalline tungsten oxide powders by a plasma arc gas condensation technique,” Cherng-Yuh Su et al. International Journal of Refractory Metals and Hard Materials 26 (2008), pp. 423-428.
“Preparation of metal oxide particles by an arc plasma method,” O. K. Ozawa et al. Annual Meeting of the Ceramic Society of Japan, Mar. 22, 2003, p. 40.
“Synthesis and photocatalytic activity of WO3 nanoparticles prepared by the arc discharge method in deionized water,” A. A. Ashkarran et al. Nanotechnology 19 (2008), pp. 1-7.
Kurumada, Mami et al., “Structure of WO3ultrafine particles and their characteristic solid states”, Journal of Crystal Growth, vol. 275, pp. c1673-c1678, (2005).

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