Composite Metal Oxide Photocatalyst Exhibiting Responsibility to Visible Light
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United States of America Patent
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Issued Date -
May 8, 2008
app pub date -
Dec 13, 2005
filing date -
Dec 13, 2004
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Abstract
A new photocatalyst, which is high in visible light response, is great in quantum efficiency, and is more excellent in photocatalytic activity, is provided. A composite metal oxide, prepared combining two photocatalytic systems of TiO.sub.2 and BiVO.sub.4, including elements of Bi, Ti, and Vi as composition elements, can be a photocatalyst having a high activity under visible light. Particularly, BiTiVO.sub.6, which is obtained at a compounding ratio of 1:1, can be a photocatalyst having a remarkably high activity under visible light. Moreover, a composite metal oxide expressed by a general formula BiTiMO.sub.6 (in the formula, M represents at least one element selected from a group consisting of V, Nb, and Ta) can be a photocatalyst having a high activity under visible light.
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