Photocatalysts Based on Titanium Dioxide
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United States of America Patent
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Issued Date -
Oct 23, 2008
app pub date -
Mar 11, 2008
filing date -
Apr 20, 2007
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Abandoned
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Abstract
A powdery photocatalyst based on titanium dioxide displays a bimodal particle size distribution of primary particles, with one particle component under about 30 nm and a second particle component over about 100 nm. The photocatalyst is manufactured by mixing at least two TiO.sub.2 components. One component is a TiO.sub.2 photocatalyst which is active in UV light and/or in visible light and which displays a specific surface according to BET of at least about 120 m.sup.2/g. The second component is anatase and/or rutile displaying a specific surface according to BET of less than about 50 m.sup.2/g. The two components are contained in the photocatalyst at a weight ratio of 1:1000 to 1000:1.
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