KR20000049327A - Oxidizing processed substraite having catalytic activity - Google Patents

Abstract

PURPOSE: An oxidization treatment base material is provided which forms oxides with anodize-type titanium oxide on a chemically treated plate by an Al and the surface of alloy base material of Al group so that it shows light catalytic activity, deodorization, shock-resistance and contamination-proof characteristics. CONSTITUTION: An oxidization treatment base material is produced as follows: (1) oxides is formed on the aluminum plate and the surface of aluminum alloy base material which contain 1-10 vol% of anodize-type titanium oxide and is 0.1-0.5 micrometer in thickness; (2) the aluminum with above oxides is chemically treated to produce an oxidization film; and (3) the aluminum material is treated with a titanium oxide on the surface of chemical film treatment by Al with light catalytic activity.

Description

Oxidizing processed substrate having catalytic activity and its preparation {Oxidizing processed substraite having catalytic activity}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxidation treatment substrate having a catalytic activity and a method for producing the same, and more particularly, to a substrate having catalytic activity by attaching titanium oxide on an aluminum plate and a method of manufacturing the same.

Background Art Conventionally, metal oxides having semiconductor characteristics, such as titanium oxide, iron oxide, tungsten oxide, and zinc oxide, have been known to have photocatalytic activity. In addition, in order to increase the catalytic activity, a method of supporting platinum radium or the like was also examined. It is also reported that a substance having a photocatalytic activity exerts effects such as deodorization and anti-fouling antiseptic sterilization. In particular, titanium oxide contains excellent photocatalytic activity by irradiating light of a specific wavelength in the ultraviolet region, and deodorizing and antiseptic sterilization effect by strong oxidation reaction, thereby utilizing titanium oxide-carrying metal and metal oxide members to clean the wastewater. . Since all oxides containing photocatalytic activity do not have a special deposition method, a method has been proposed in which a fine titanium oxide powder is contained during coating film formation to apply a spray deposit spot to the corresponding device.

This coating method is easy to detach and has a problem that the film is easily damaged when subjected to an external force such as cleaning, thereby causing a problem in the expression and persistence of the catalytic activity and thus causing problems in practical use. Moreover, when the base material is used as a titanium material, there is a problem that the manufacturing cost is higher than that of aluminum.

The present invention has been made to solve the above-mentioned problems, using pure aluminum as the base material and forming anodized titanium-containing oxide pieces on the surface thereof, the base material is a low-cost aluminum and the effect of deodorization and the like Its purpose is to firmly attach expensive catalytically active oxides thereon.

It has a chemical agent on the surface of an aluminum or aluminum-based alloy base material and forms a chemical oxide film on the surface of the aluminum plate, thereby providing an oxide film having good corrosion resistance.

The present invention provides a method for producing an oxidation treatment substrate having a catalytic activity for imparting excellent photocatalytic activity in order to achieve the above object, wherein anodized titanium oxide is deposited on the surface of an aluminum plate and an aluminum alloy substrate. Surface of Al anodized film having photocatalytic activity on Al and Al base alloys containing 9 to 10 times and having an aluminum oxide having a photocatalytic activity formed by chemical treatment of an oxide piece having a thickness of 0.1 to 0.5 micrometers or more. It provides a method for producing an oxidation processor having a catalytic activity, characterized in that the titanium oxide treatment.

Hereinafter, the configuration of the present invention in detail.

Pure aluminum is used as the base material, and an oxide piece containing anodized titanium oxide is formed on the surface thereof, and an aluminum base alloy is used as the base material on the surface thereof. anodize) is formed by forming an oxide piece containing titanium oxide.

An aluminum base alloy that can be used as the latter aluminum base alloy base is an oxide containing one element of the platinum group elements Pd, Ru, Pt, Rh, Os, and Ir on an aluminum base alloy plate made of a mixed structure of silicon and magnesium. There is a piece coated. In addition, the titanium photocatalytic activity thus oxidized has the advantage of excellent expression and persistence.

By using a chemical agent on the surface of an aluminum or aluminum base alloy base material and creating a chemical oxide film on the surface of the aluminum plate, an oxide film having good corrosion resistance is obtained. That is, 46 grams of NaCO ₃ + 14 grams of CrO ₃ are mixed into 1 liter of water, and the aluminum plate 3 to 3.3 m ² is deposited for 15 minutes, treated at 95 to 100 ° C., and washed well at 50 to 80 ° C. After drying, the effect can be exerted on the aluminum sheet.

After chemically oxidizing the oxidation-treated aluminum or aluminum-based alloy material having a photocatalytic activity as described above, a photoreactive semiconductor toxic substance remover containing titanium oxide is applied by a spray method, a deposit method, and the like at 10 to 80 ° C. After drying for 20 minutes, it is preferable to thermally oxidize within 30 to 60 minutes in the temperature range of 200 ~ 500 ℃ in an oxidizing atmosphere.

In general, since the chemical oxide film is formed on the aluminum surface and the oxide piece is formed on the surface, that is, a very fine chemically safe titanium oxide is formed on the surface under an oxidizing atmosphere, the film containing the fine titanium oxide powder exhibits photocatalytic activity. It is possible to exercise. Furthermore, the adhesion to the oxide film substrate is good, and the peeling problem is eliminated in the above-described coating film.

Titanium oxide pieces have good adhesion and have been tried to form oxide pieces having photocatalytic activity on the surface of an aluminum substrate by employing conventional chemical oxidation and ion oxidation methods for the purpose of being formed on the surface of an aluminum substrate. Titanium oxide pieces were formed thick by using anodization and ion oxidation, but the photocatalytic activity was not well realized.

Therefore, excellent photocatalytic activity is reliably exhibited when anodized titanium oxide is contained in the oxide pieces formed on the surface of the aluminum material including the factors imparted to the photocatalytic activity from the uniformity of the gel and the sol of the titanium oxide to the preparation of the crystal. It is recognized that such anodized titanium oxide is produced by combining a chemical oxidation degree of an aluminum plate, a conductor conductivity of Ti, and a heat oxidation treatment in an oxidation atmosphere.

Oxide fragment formation and heat oxidation method should be combined with general chemical oxidation method. Oxide fragment is 6.2cc ~ 10cc ethanol, 0.4cc ~ 1.0cc 36% HCl for oxidation, 3cc ~ 10cc TiCl ₃ and platinum group RuCl ₃ Oxide pieces are formed by spraying with a mixed solution of 1 g, Pd 1 g, and S 1 g. It was confirmed that the photocatalytic activity changed drastically due to the generation of anodized titanium oxide in the oxide piece. The excellent photocatalytic activity is that the thickness of the oxide piece formed by the complex treatment is in the range of 0.1 μm to 0.5 μm, and the anodized titanium oxide content contained in the oxide piece is 1 vol% to 10 vol%. It was confirmed that this was manifested.

In order to effectively produce and function anodized titanium oxide by being contained in the above-mentioned elements, the standard content is in the range of 0.01 to 10% by weight, and suitable in the range of 0.1 to 5% by weight, depending on the type of the element having an appropriate content. to be. Although there is no restriction | limiting in particular in the upper limit of the thickness of an oxide piece, Photocatalytic activity is about 10 micrometers most excellent, and even more thickness does not acquire further performance. In consideration of practicality, 10 μm or less is generally preferable.

The chemical oxidation film was coated with Ti gel and platinum element Ru made of sol RuCl ₃ and dried at 80 ~ 100 ℃, followed by heat oxidation treatment in an oxidizing atmosphere at 200 ~ 500 ℃. Minutes. Or in order to fully oxidize in 200-500 degreeC in oxidizing atmosphere, you may oxidize for 1 hour to 2 hours.

If the thickness of the coated oxide (Ti, Ru) coated element is too thin, the acid coating does not grow even if it is heated. If the degree of heating is low, it does not change from amorphous oxide to anodized oxide. If it is too high, the thing produced | generated from a crystalline oxide and a lujiru-type oxide generate | occur | produce, and in either case, the amount of oxides of the anodized titanium oxide content of the thickness as the intention of this invention cannot be obtained.

To illustrate the configuration and operation and effect of the present invention in more detail as follows, the present invention is not limited by the following examples. It can implement by making a change within the range of the grade suitable for the above-mentioned effect. All of them are included in the technical scope of the present invention.

Example 1

Using the order of an aluminum material and mixing that a pure aluminum plate after degreasing the alloy material with strong alkali solution, a neutralization after washed well enough, and then chemicals i.e. NaCO ₃ 46 grams and CrO ₃ 14 grams of 1 liter of water An aluminum plate 3 to 3.3 m ² is deposited at 80 ° C. for 15 minutes to form a chemical film, and then dried at 80 ° C. to 90 ° C.

Titanium TiCl ₃ and RuCl ₃ were made into an aqueous sol in a 3: 1 ratio and coated 4-5 times to 1-5 g in 3 m to 1 g ² , each time at 200-500 ° C. for 30 minutes in an oxidizing atmosphere for a short time and for 1 hour to 2 hours Oxidation is applied. The thickness of the oxide piece and the amount of titanium oxide of the anodized type are in the range of 0.1 to 5% by weight, the thickness is from 0.1 to 5 m, and the upper limit is not particularly limited. For the pure aluminum chemical film, the adhesion of the oxide was evaluated by 180 degree bending experiments as shown in the following photocatalytic activity, deodorization, and antibacterial activity tank.

The photocatalytic activity is evaluated by relatively generating the elements produced by immersing the oxidized platelets oxidized in Kl (Okdori-dori) into black light with high UV intensity. As such, the larger the value, the higher the photocatalytic activity.

Deodorizing effect Evaluated by measuring a certain amount of ammonia at the outlet by irradiating a certain amount of ultraviolet light (Black light (3mW / ℃ m ² ) on the outside of each oxidized aluminum plate to evaluate the concentration of ammonia. The higher the photocatalytic activity, the more generally the titanium substrate is 20 times more expensive than the aluminum substrate, and it is not used in polar acid or strong alkaline solutions like insoluble anodes, but also in titanium. To this end, the electrolytic rectifier must also use a high voltage DC150 volts or more, expensive equipment is needed, and the equipment cost is low for aluminum materials.

Example 2: A commercially available aluminum plate and lath (Lath), 10cm x 20cm x 2mm It is treated in a chemical solution to degreasing alkali, and then washed sufficiently, and dried at 80 ~ 100 ° C.

The ratio of the mixture was 4.5 cc of isopropyl alcohol, 0.2 cc of (36% hydrochloric acid), 3 g of titanium trichloride, and 1 g of RuCl ₃ (titanium chloride) in an aluminum plate or aluminum lath as one or more solutions. It heats at 200-500 degreeC in an oxidizing atmosphere. Repeat this step 5 times to make the titanium oxide plate up to the desired thickness. Heat 30 to 60 minutes.

Example 3: Commercially available aluminum plates and laths (metal lath 10 cm x 20 cm x 2 mm) are degreased and washed with alkali, treated with chemical solution, thoroughly washed and dried at 80 to 100 ° C.

A mixture of 30 wt% isopropyl alcohol, 2 wt% palladium chloride (PdCl 40%), 1 wt% platinum chloride (Pt 40%), and 5 wt% titanium chloride is repeatedly sprayed or dipped several times. Process. After each treatment, the mixed solution is painted, dried at 80 to 100 ° C, and then temporarily treated at 200 to 500 ° C. in an oxidation furnace. However, by mixing ammonia or volatile amine (Amine) and heating at 200 ~ 500 ° C in an atmosphere of reducing gas to prepare a predetermined plate.

By forming an oxide piece containing anodized titanium oxide on the surface of Al chemically treated plate and Al base alloy base, it is possible to give excellent photocatalytic activity at low cost, and has various deodorization, shockproof, antifouling and sterilizing effect. It can be utilized effectively as various subsidiary materials used for a use, for example, a building material, an air conditioning equipment, a water purification equipment, etc.

Claims (5)

In the method for producing an oxidation treatment base material having a catalyst activity for imparting excellent photocatalytic activity, Al or alloy material is a film having a photocatalytic activity for forming an oxide piece on the surface of the substrate by heat treatment in an oxidizing atmosphere after anodizing. The treatment was coated with a potential of 12 to 20 volts at 12 to 20 volts of sulfuric acid, followed by sufficient washing with water, followed by drying at 50 to 80 degrees Celsius, followed by anodizing titanium oxide on the surface of the aluminum plate and the aluminum alloy substrate. Al anode film treatment having photocatalytic activity on Al and Al base alloys containing 9 to 10 times the volume and having an aluminum oxide having a photocatalytic activity formed by chemical treatment of an oxide piece having a thickness of 0.1 to 0.5 micrometers or more. A method for producing an oxidation processor having catalytic activity, characterized in that titanium oxide is treated on a surface. The method for producing an oxide processor according to claim 1, wherein the pure Al substrate or an alloy substrate of Si, Mg, Cu is claimed. The oxide piece according to claim 1, wherein the oxide piece formed on the surface of the Al and Al alloy base material has a thickness of 0.1 to 0.5 micrometers or more and the content of the anodize titanium oxide contained in the oxide piece is 1 volume 9 or more. Manufacturing method. 2. The catalytic activity according to claim 1, wherein fine powders of titanium oxide are contained in the coating film forming material on the surfaces of Al and Al alloys and applied to the corresponding portions of the apparatus and the substrate by spraying, depositing, spots, and the like. Method for producing an oxidation treatment substrate. The surface of the substrate according to claim 1, wherein the sol of the titanium oxide is applied to a corresponding portion of the coating film-forming material by spray depisit spot or the like, dried at the first 50 to 80 ° C, and heat-oxidized at an oxidation atmosphere of 200 to 500 ° C. A method of producing an oxide-treated Al plate and an Al-based alloy material having a titanium photocatalytic activity, characterized in that an oxide piece is formed on the substrate and treated well.