Rutile-type titanium dioxide photocatalyst
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United States of America Patent
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May 21, 2013
Grant Date -
Jun 30, 2011
app pub date -
May 26, 2009
filing date -
Jun 27, 2008
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Expired
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Abstract
It has been demanded to produce titanium dioxide having an excellent photocatalytic activity and an excellent super-hydrophilic property by a simple procedure suitable for the production on an industrial scale. Rutile-type titanium dioxide having an excellent photocatalytic activity can be produced by carrying out the anodic oxidization of the surface of a base material comprising titanium or a titanium alloy by applying a voltage (e.g., a high voltage) or carrying out the anodic oxidation of the surface of the base material under high current density conditions. Further, a film is produced on the surface of the base material by the anodic oxidation technique by applying a voltage or the anodic oxidization technique under high current density conditions, and the film is subjected to heat treatment, thereby producing rutile-type titanium dioxide having excellent crystallinity.
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