Titanium dioxide photo-catalyzed film and preparation method thereof

A photocatalytic thin film, titanium dioxide technology, applied in ion implantation plating, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems such as not found, and achieve large specific surface area, excellent photocatalytic performance, excellent light transmittance and light The effect of catalytic performance
CN102864481AActive Publication Date: 2013-01-09NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Publication Date
2013-01-09

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Abstract

The invention discloses a titanium dioxide photo-catalyzed film and a preparation method thereof. The titanium dioxide photo-catalyzed film has a spongy porous structure; the length of holes along the growth direction is 200nm-800nm; and the maximal width of the holes along the direction vertical to the growth direction is 10nm-300nm. The preparation method for the titanium dioxide photo-catalyzed film comprises the following steps: depositing a columnar structural titanium film on a substrate by adopting a magnetron sputtering method, wherein the depositing pressure is 0.1-1Pa; preparing the titanium dioxide having a porous structure by anodizing the titanium film; sputtering the deposited titanium film as an anode and taking graphite as a cathode; taking a mixed solution of ammonium fluoride, water and organic saturate alcohol as an electrolyte; keeping a constant voltage at 25-50V; and thermally treating, thereby obtaining the titanium dioxide photo-catalyzed film. The titanium dioxide photo-catalyzed film provided by the invention has the characteristics of high light transmission and high photo-catalytic reaction rate constant and meets the requirements of photo-catalyzed materials, such as self-cleaning glass, air and waste water purifier, and the like.
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Description

technical field

[0001] The invention relates to the technical field of photocatalytic film material preparation, in particular to a titanium dioxide photocatalytic film and a preparation method thereof. Background technique

[0002] Titanium dioxide is one of the wide-bandgap semiconductor materials with the most application potential at present, especially the ability of photoexcitation to generate electron-hole pairs has been widely used in the field of photocatalysis.

[0003] Anodic oxidation on bulk titanium metal such as titanium foil or titanium alloy is currently the most widely used method for preparing titanium dioxide. The research group of Professor Craig A.Grimes in the United States published a series of articles on the preparation of titanium dioxide nanotubes by anodic oxidation on titanium foil. The photocatalytic activity of titanium dioxide nanotubes prepared by anodic oxidation is about 3 times stronger than that of flat titanium dioxide films, and anodi...

Claims

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