Visible-light-responsive photocatalyst powder, and visible-light-responsive photocatalytic material, photocatalytic coating material and photocatalytic product each using the same
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United States of America Patent
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Jun 6, 2017
Grant Date -
Aug 12, 2010
app pub date -
Sep 5, 2008
filing date -
Sep 5, 2007
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Abstract
A visible-light-responsive photocatalyst powder includes a tungsten oxide powder. The tungsten oxide powder has color whose a* is −5 or less, b* is −5 or more, and L* is 50 or more when the color of the powder is expressed by an L*a*b* color system. Further, the tungsten oxide powder has a BET specific surface area in a range of 11 to 820 m2/g.
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