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Electrophoresis preparation method for surface optical catalytic film of metal substrate

A metal substrate, photocatalytic technology, applied in catalyst activation/preparation, chemical instruments and methods, electrophoretic plating, etc., can solve problems such as high cost and complex process, and achieve low cost, uniform film layer, and high photocatalytic performance. Effect

Inactive Publication Date: 2003-08-27
FUZHOU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the deficiencies of the prior art and the problems of complex process or high cost, the present invention provides an electrophoretic preparation method of photocatalytic film on the surface of metal substrate, that is, using the conductivity of metal material and the chargeability of composite titanium dioxide colloidal particles, through electrophoresis The method is to load titanium dioxide or a binary composite oxide film containing titanium dioxide on the surface of the metal substrate to prepare organic pollutants, antibacterial, antifungal, antifouling, and reduce nitrogen oxides (NO X ) and other photocatalytic functional supported metal-inorganic composite materials

Method used

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  • Electrophoresis preparation method for surface optical catalytic film of metal substrate

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Embodiment 1

[0011] Embodiment 1: the preparation of pure titanium dioxide sol electrophoresis liquid

[0012] In 1 liter of 2.5% titanium dioxide sol (PH=3.2) prepared in the method of patent 98115808.0, add 10 grams of polyethylene glycol and stir evenly under electromagnetic stirring to prepare titanium dioxide sol electrophoretic liquid.

Embodiment 2

[0013] Embodiment 2: the preparation of titania-silica sol electrophoretic liquid

[0014] Under vigorous stirring, 50 ml of ethyl orthosilicate was slowly dropped into a solution prepared by 0.25 ml of concentrated nitric acid (68%) and 100 ml of deionized water, and the stirring was continued until a uniform transparent silica sol was formed. 100 milliliters of this sol was mixed with 1000 milliliters of titanium dioxide sol prepared according to Example 1, and 50 grams of polyethylene glycol was added, and stirred evenly under electromagnetic stirring to prepare titanium dioxide sol electrophoretic liquid. In the electrophoretic liquid, the content of titanium dioxide is 2.3%, the content of silicon dioxide is 1.1%, the content of polyethylene glycol is 4.5%, and the pH value is 2.8.

Embodiment 3

[0015] Embodiment 3: the preparation of titania-zirconia sol electrophoretic liquid

[0016] Under vigorous stirring, 15.7 milliliters of tetrapropyl zirconate was slowly dropped into a solution prepared by 4.3 milliliters of concentrated nitric acid (68%) and 215 milliliters of deionized water, and the stirring was continued until a uniform and transparent zirconia sol was formed. 250 milliliters of this sol was mixed with 1000 milliliters of titanium dioxide sol prepared according to Example 1 and stirred evenly, and 25 grams of polyethylene glycol was added, and stirred evenly under electromagnetic stirring to prepare titanium dioxide sol electrophoretic liquid. In the electrophoretic liquid, the content of titanium dioxide is 2.0%, the content of zirconium dioxide is 0.5%, the content of polyethylene glycol is 2.0%, and the pH value is 2.0.

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Abstract

The present invention discloses a preparation method of titanium dioxide photocatalytic membrane loaged on metal surface, its main technological process includes: in the electrophoretic solution containing a certain content of titanium dioxide sol or containing binary or multi-component compounded oxide sol of titanium dioxide using the pretreated metal base body as cathode, using graphite, aluminium, stainless steel and inert metal as anode, utilizing electrophoretic mode to form a layer of titanium dioxide membrane on the metal surface under the condition of a certain voltage, drying and calcining to make the titanium dioxide membrane be fixed on the metal surface. Said membrane is high in adhesive strength, and has high photocatalytic activity.

Description

technical field [0001] The invention relates to a preparation method of a supported photocatalytic film, specifically a method for loading titanium dioxide on a metal substrate or containing binary or multiple components such as zirconium dioxide, silicon dioxide, aluminum oxide, tin dioxide, zinc oxide, etc. The invention discloses an electrophoretic preparation method of a photocatalytic film on the surface of a metal substrate of a titanium dioxide composite photocatalytic film. Background technique [0002] In recent years, titanium dioxide as a photocatalyst has been increasingly widely studied and applied in environmental treatment such as air purification and wastewater treatment. However, some technical problems of titanium dioxide as a photocatalyst limit its practical application. In addition to the well-known shortcomings such as low quantum efficiency and low solar energy utilization, the difficulty of separating the catalyst from the reaction system is an impor...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/02C02F1/32C25D13/02
CPCY02W10/37
Inventor 付贤智刘平戴文新邵宇陈旬
Owner FUZHOU UNIV
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