JP2010029867A - Carrier for photocatalyst - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carrier for a photocatalyst which is capable of decomposing a harmful organic substance and the like to make it harmless, in a room or else and making the same harmless in the maintenance-free state over a long period. <P>SOLUTION: The carrier for a photocatalyst includes an organic fiber whose surface has a plurality of fine pores and a photocatalyst which is carried with such a thickness as not to fill up the fine pores on the surface of the organic fiber, and the organic fiber has a light permeability. Alternatively, a photocatalyst which is provided with an organic fiber group made by bundling a plurality of organic fibers; a transparent covering material which covers the surroundings of the organic fiber group and which is provided with a plurality of fine pores on its surface; and a photocatalyst which is carried with such a thickness as not to fill up the fine pores on the surface of the covering material. The organic fiber has a light permeability. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a photocatalyst carrier, and particularly to a photocatalyst carrier effective for air cleaning, deodorization, antifouling, sterilization, antibacterial and the like.

  In recent years, as air purifiers and deodorizers used for the purpose of purifying and deodorizing indoor air, etc., a filter that captures harmful organic substances, malodorous components, etc., carrying titanium oxide having a photocatalytic function Is provided.

  Such air purifiers, deodorizers, etc. use the photocatalytic function of titanium oxide to absorb light energy and change the moisture in the air to hydroxy radicals, which have this strong decomposing power. In this way, harmful organic substances, malodorous components and the like are decomposed into water and carbon dioxide to render them harmless (see, for example, Patent Document 1).

  However, in order to decompose indoor harmful organic substances, malodorous components, etc. with titanium oxide, it is necessary to efficiently contact the surface of titanium oxide activated harmful organic substances, malodorous components, etc. to be decomposed, A large processing area is required for the volume of the room or the like, and the apparatus becomes very large. In addition, since harmful organic substances, malodorous components, etc. are flowing in a room at a relatively high speed, they cannot be brought into efficient contact with the surface of titanium oxide, and the photocatalytic function of titanium oxide can be sufficiently exerted. Cannot achieve the desired effect. Furthermore, since the titanium oxide cannot function as a photocatalyst at a place where no light is applied, the usable range is limited.

  On the other hand, in order to cope with the above-mentioned problems, charcoal having a plurality of fine pores, inorganic materials such as calcium silicate plates and activated carbon fibers are used as an adsorbent, and a photocatalyst such as titanium oxide is used as the adsorbent. There has been proposed a structure in which harmful organic substances, malodorous components and the like trapped in the fine pores of the adsorbent are gradually decomposed and rendered harmless by carrying them (see, for example, Patent Document 2).

  However, since the adsorbent having such a structure does not have optical transparency, harmful organic substances, malodorous components, etc. adsorbed inside the adsorbent cannot be decomposed. Also, once adsorbed harmful organic substances, malodorous components and the like are not easily dissipated to the outside, the adsorbent itself must be replaced when the adsorbent becomes saturated, requiring much labor for maintenance.

JP 2002-363858 A JP 2002-115176 A

  The present invention has been made in view of the above-described conventional problems, and can efficiently capture harmful organic substances such as indoors, malodorous components, etc., decompose and render them harmless, and capture them on the surface. Not only harmful organic substances, but also harmful organic substances trapped inside can be reliably decomposed and rendered harmless. Furthermore, indoors and other harmful organic substances can be removed for a long time without maintenance. An object of the present invention is to provide a photocatalyst carrier which can be decomposed and rendered harmless.

The present invention employs the following means in order to solve the above problems.
That is, a photocatalyst carrier comprising an organic fiber having a plurality of micropores on the surface and a photocatalyst supported to a thickness that does not completely fill the micropores on the surface of the organic fiber, Has a light-transmitting property.
In addition, an organic fiber group formed by bundling a plurality of organic fibers, a transparent coating material that covers the periphery of the organic fiber group and has a plurality of micropores on the surface, and the micropores on the surface of the coating material A photocatalyst carrying body provided with a photocatalyst carried in a thickness that does not fill up, wherein the organic fiber has light transmittance.
The photocatalyst may be titanium oxide.
The organic fiber may be provided with a protective layer for preventing the organic fiber from being decomposed by the photocatalyst.
The organic fiber may be a polyamide fiber, a polyethylene fiber, a polyester fiber, a phenol fiber, an acrylic fiber, or a polyvinyl alcohol fiber.

As described above, according to the present invention, harmful organic substances adsorbed on the surface and in the micropores of the organic fiber, the malodorous components such as the organic fiber surface photocatalyst (titanium oxide) as a photocatalyst through the light to the organic fibers By making it function, it can be decomposed into water and carbon dioxide and rendered harmless. Therefore, harmful organic substances adsorbed in the micropores on the surface of the organic fiber are accumulated in the portion and become saturated, and the decomposition ability of the harmful organic substances does not deteriorate, and the initial state is maintenance-free. Decomposition ability can be demonstrated for a long time.

Furthermore, since the photocatalyst of the organic fiber surface (titanium oxide) through an optical organic fibers it is sufficient to function as a photocatalyst, it can also be decomposed by adsorbing harmful substances in places where light is not exposed, significant coverage Can be spread.

Furthermore, in the case where the periphery of the organic fiber group is coated with a coating material, harmful organic substances adsorbed in the surface of the coating material and in each micropore, malodorous components, etc. are passed through each organic fiber and the photocatalyst on the coating material surface. By causing (titanium oxide) to function as a photocatalyst, it can be decomposed into water and carbon dioxide and rendered harmless. Therefore, harmful organic substances adsorbed in the fine pores of the coating material are accumulated in the portion and become saturated, and the decomposition ability of the harmful organic substances does not deteriorate. Ability can be demonstrated over the long term.

Furthermore, it is only necessary to allow the photocatalyst (titanium oxide) on the surface of the coating material to function as a photocatalyst by passing light through the organic fiber , so that harmful substances can be adsorbed and decomposed even in places where no light is applied, greatly expanding the range of application. Can be spread.

Furthermore, since it is not necessary to process the organic fiber itself, the existing organic fiber having optical transparency can be used as it is, and the application range can be further expanded.

It is the schematic which showed 1st Embodiment of the photocatalyst carrier by this invention. It is the schematic which showed 2nd Embodiment of the photocatalyst carrier by this invention. FIG. 3 is a side view of FIG. 2.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The present specification includes the following inventions.

1st invention consists of the fiber which has a light transmittance, and a several micropore is provided in the surface, and the photocatalyst supported by the thickness which does not fill up the said micropore on the surface of this fiber, It is characterized by the above-mentioned. And According to the photocatalyst carrier according to the first invention, harmful organic substances, malodorous components and the like are adsorbed on the fiber surface and in the micropores. The harmful organic substances, malodorous components, etc. adsorbed on the fiber surface and in the micropores are made harmless by being decomposed into water and carbon dioxide by passing light through the fiber and causing the photocatalyst on the fiber surface to function as a photocatalyst. Will be.
The second invention includes a fiber group formed by bundling a plurality of fibers having optical transparency, a transparent coating material that covers the periphery of the fiber group and has a plurality of micropores on the surface, and a surface of the coating material And a photocatalyst supported in a thickness that does not fill the fine holes. According to the photocatalyst carrier according to the second invention, harmful organic substances, malodorous components and the like are adsorbed on the surface of the coating material and in the micropores. Then, harmful organic substances, malodorous components, etc. adsorbed on the surface and fine pores of the coating material are converted into water and carbon dioxide by allowing the photocatalyst on the surface of the coating material to function as a photocatalyst through each fiber of the fiber group. It will be decomposed and detoxified.
A third invention is the photocatalyst carrier according to the first or second, wherein the photocatalyst is titanium oxide. According to the photocatalyst carrier according to the third aspect of the invention, harmful organic substances, malodorous components, etc. adsorbed on the surface of the fiber or the coating material and in the fine pores pass through each fiber of the fiber or fiber group, and the surface of the fiber or the coating material. By causing the surface titanium oxide to function as a photocatalyst, it is decomposed into water and carbon dioxide and rendered harmless.
A fourth invention is the photocatalyst carrier according to any one of the first to third, wherein the fiber is an inorganic fiber or an organic fiber. According to the photocatalyst carrier according to the fourth aspect of the present invention, harmful organic substances, malodorous components, etc. adsorbed on the surface and fine pores of the fiber or coating material are fibers (inorganic fibers or organic fibers) or fibers (inorganic fibers) of the fiber group. Or, the titanium oxide on the surface of the fiber (inorganic fiber or organic fiber) or the surface of the coating material is made to function as a photocatalyst by passing light through the organic fiber), so that it is detoxified by being decomposed into water and carbon dioxide.
FIG. 1 shows a schematic diagram of a first embodiment of a photocatalyst carrier according to the present invention. This photocatalyst carrier 1 decomposes harmful organic substances such as indoors, malodorous components, dirt, bacteria, and the like. Thus, the fiber 2 and the photocatalyst 4 supported on the surface of the fiber 2 are provided.

  The fiber 2 is light-transmitting, has a plurality of fine pores 3 on the surface, and can carry the photocatalyst 4 on the surface. For example, in addition to inorganic fibers or organic fibers, existing fibers An optical fiber is mentioned. As long as the light transmission property is provided in the fiber group or the twisted fibers, fibers that do not have light transmittance may be mixed in a part of the fibers to be twisted.

  The inorganic fiber has a characteristic that the fiber itself is not decomposed by the photocatalyst 4. Therefore, the fiber 2 of the present invention is effective in that the photocatalyst 4 can be easily supported. By providing a plurality of fine pores 3 of several nm to several μm on the surface of the inorganic fiber, an adsorption function for adsorbing an organic substance or the like can be imparted to the inorganic fiber. As a method of providing the fine pores 3 in the inorganic fiber, a well-known porous method can be mentioned.

  Inorganic fibers include carbon fiber, activated carbon fiber, silicon fiber, alumina fiber, boron fiber, silicon carbide fiber (SiC), silicon carbide / carbon fiber (SiC / C), glass fiber, and Tyranno fiber (Si-Ti-C). -O type), ceramic fibers (also referred to as ceramic fibers, alumina, siliceous fibers) and the like. Of these inorganic fibers, activated carbon fibers have a function of adsorbing organic substances and the like, and therefore can be used as they are without being made porous.

  The organic fiber may be decomposed by the photocatalyst 4 itself. Therefore, when carrying the photocatalyst 4, it is necessary to provide a protective layer that prevents decomposition. By providing a plurality of fine pores 3 of several nm to several μm on the surface of the organic fiber as in the case of the inorganic fiber, an adsorption function for adsorbing an organic substance or the like can be imparted to the organic fiber. As a method for providing the micropores 3 in the organic fiber, a well-known porous method can be used as in the case of the inorganic fiber.

  Examples of the organic fiber include polyamide fiber, polyethylene fiber, polyester fiber, phenol fiber, acrylic fiber, and polyvinyl alcohol fiber.

  Deodorant fibers can also be used as these inorganic fibers and organic fibers. Deodorant fibers include, for example, polyester fiber (shine up (registered trademark: Kuraray Co., Ltd.)) in which titanium oxide and inorganic fine particles (deodorant) are kneaded into the fiber, and a metal compound with a high deodorizing effect bound to the fiber. Examples thereof include acrylic fibers (Sirius (registered trademark: Mitsubishi Rayon Co., Ltd.)-V), acrylic fibers kneaded with chitosan (Parklin (registered trademark: Mitsubishi Rayon Co., Ltd.)), and the like.

  Among the optical fibers, inorganic fibers such as quartz fibers and multicomponent glass fibers can be provided with a function of adsorbing organic substances and the like by making them porous in the same manner as the various fibers described above.

As the photocatalyst 4, titanium oxide (titanium dioxide, TiO ₂ ) is effective. As mentioned above, titanium oxide absorbs the energy of light and changes the moisture in the air to hydroxy radicals through an oxidation reaction. Due to the action of hydroxy radicals with strong decomposability, harmful organic substances, malodorous components, etc. It is decomposed into water and carbon dioxide and rendered harmless. The photocatalyst is not limited to titanium oxide, and may be any as long as it has a similar function.

  The photocatalyst 4 is supported on the surface of the fiber 2 with a predetermined thickness. In order to carry the photocatalyst 4, the surface of the fiber 2 is coated with a photocatalyst coating material by a method such as application, spraying, dripping, etc., and then solidified and fixed by a method such as baking or room temperature drying. .

  The photocatalyst 4 needs to be supported on the surface of the fiber 2 with a thickness that does not fill up each micropore 3 so that the adsorption performance of the fiber 2 to harmful organic substances and the like is not impaired. By supporting the photocatalyst 4 on the surface of the fiber 2 with such a thickness, harmful organic substances, malodorous components and the like can be adsorbed on the surface of the fiber 2 and in each micropore 3.

  And when the photocatalyst carrier 1 according to this embodiment configured as described above is used for a filter such as an air purifier or a deodorizer, and the air purifier or the deodorizer is installed at a predetermined position in a room or the like, Hazardous organic substances, malodorous components, bacteria, etc. floating in the room come into contact with the surface of the fiber 2 of the photocatalyst carrier 1 and are adsorbed on the surface of the fiber 2 and in each micropore 3.

  Then, by passing light through the fiber 2 by an appropriate method, the photocatalyst 4 on the surface of the fiber 2 exhibits a function as a photocatalyst, and a harmful organic substance adsorbed on the surface of the fiber 2 and in each micropore 3, Malodorous components and the like are decomposed into water and carbon dioxide to make them harmless, air in the room is purified, and the environment is improved.

  In the photocatalyst carrier 1 according to this embodiment configured as described above, harmful organic substances, malodorous components, and the like are adsorbed not only on the surface of the fiber 2 but also in each micropore 3 on the surface of the fiber 2. Therefore, it is possible to efficiently capture and decompose harmful organic substances, malodorous components, etc. floating in the room.

  Moreover, since the photocatalyst 4 on the surface of the fiber 2 can function as a photocatalyst by allowing light to pass through the fiber 2, harmful organic substances, malodorous components, etc. are decomposed and rendered harmless even in places where no light is applied. And the applicable range can be expanded.

  Furthermore, since harmful organic substances, malodorous components, etc. adsorbed in each micropore 3 can be reliably decomposed and detoxified, the fiber 2 becomes saturated and the decomposition ability decreases. In a maintenance-free state, it is possible to decompose and detoxify harmful organic substances over the long term.

  FIGS. 2 and 3 show a second embodiment of the photocatalyst carrier according to the present invention. This photocatalyst carrier 11 bundles a plurality of fibers 13 having light permeability into a fiber group 12. In addition, the periphery of the fiber group 12 is covered with a transparent coating material 14 having a plurality of fine holes 15 on the surface, and the photocatalyst 16 is supported on the surface of the coating material 14 with a predetermined thickness. The other configurations are the same as those shown in the first embodiment.

  That is, in this embodiment, each fiber 13 of the fiber group 12 may be any light-transmitting one, and a plurality of fine holes are formed on the surface of each fiber 13 as shown in the first embodiment. There is no need to provide. Therefore, it is possible to use the inorganic fiber or the organic fiber described above for each fiber 13, as well as various existing optical fibers (quartz fibers (silicon tetrachloride, germanium tetrachloride, etc.), multicomponent fibers, plastic fibers. (Polymethyl methacrylate, vinylidene fluoride, polystyrene, etc.) can also be used.

  The covering material 14 is composed of a transparent tube made of various synthetic resins. A plurality of fine holes 15 similar to the fine holes 3 of the first embodiment are provided on the surface of the covering material 14. In order to provide the micropores 15 in the covering material 14, various well-known porous methods can be used.

  The photocatalyst 16 supported on the surface of the covering material 14 may be supported on the surface of the covering material 14 with a thickness that does not completely fill the micropores 15 so that the adsorption performance for harmful organic substances and the like is not impaired. is necessary. By supporting the photocatalyst 16 on the surface of the covering material 14 with such a thickness, harmful organic substances, malodorous components, and the like can be adsorbed on the surface of the covering material 14 and in each micropore 15.

  When the photocatalyst carrier 11 according to this embodiment configured as described above is installed at a predetermined position in the room or the like, harmful organic substances, malodorous components, bacteria, etc. floating in the room or the like are covered with the coating material 14 of the photocatalyst carrier 11. In contact with the surface of the coating material 14 and adsorbed in the surface of the coating material 14 and in each micropore 15.

  Then, by allowing light to pass through each fiber 13 of the fiber group 12 by an appropriate method, the photocatalyst 16 on the surface of the coating material 14 functions as a photocatalyst and is adsorbed on the surface of the coating material 14 and in each micropore 15. Harmful organic substances, malodorous components, etc., are decomposed into water and carbon dioxide to make them harmless, and air in the room is purified and the environment is improved.

  In the photocatalyst carrier 11 according to this embodiment configured as described above, not only the surface of the coating material 14 but also harmful organic substances, malodorous components, etc. are present in the micropores 15 on the surface of the coating material 14. Since it can be adsorbed, it can efficiently capture and decompose harmful organic substances, malodorous components, etc. floating in the room.

  In addition, since the photocatalyst 16 on the surface of the covering material 14 can function as a photocatalyst by passing light through each fiber 13 of the fiber group 12, harmful organic substances, malodorous components, etc. It can be decomposed and detoxified, and the applicable range can be expanded.

  Furthermore, since harmful organic substances, malodorous components and the like adsorbed in each micropore 15 can be reliably decomposed and rendered harmless, the covering material 14 becomes saturated and the decomposition ability decreases. No, it can be detoxified by decomposing harmful organic substances over a long period in a maintenance-free state.

  Furthermore, by improving the existing optical fiber cable, it can function as the photocatalyst carrier 11 according to the present invention, so that an economically advantageous one can be provided.

  The photocatalyst carriers 1 and 11 according to the present invention configured as described above can be applied to households, offices, livestock farms, etc. to purify their air, deodorize them, remove bacteria, etc. The environment can be improved.

  Specifically, toilets, floors, storages, warehouses, storage rooms, ceilings, air purifiers, air purifier filters, smoking rooms, ducts, livestock farms, air conditioners, cars (air conditioners, seats, trunks, engine rooms), Can be used for trash can, kennel, shoes (boots, boots, leather shoes), clothes, underwear, care products (diapers, diaper covers, pajamas, shade between buildings and buildings, kitchens, lockers, closets, etc. .

DESCRIPTION OF SYMBOLS 1,11 Photocatalyst carrier 2,13 Fiber 3,15 Micropore 4,16 Photocatalyst 12 Fiber group 14 Coating material

Claims (5)

And organic fibers having a plurality of micropores are provided on the surface, a photocatalyst carrier that includes a photocatalyst carried by the thickness never fill the micropores on the surface of the organic fibers,
The photocatalyst carrier, wherein the organic fiber has light permeability. An organic fiber group formed by bundling a plurality of organic fibers, as well as covering the periphery of the organic fiber group, and a covering material transparent to a plurality of micropores are provided on a surface, fill the micropores on the surface of the dressing A photocatalyst support comprising a photocatalyst supported with a thickness that does not occur ,
The photocatalyst carrier, wherein the organic fiber has light permeability.   The photocatalyst carrier according to claim 1 or 2, wherein the photocatalyst is titanium oxide. The photocatalyst carrier according to claim 1 or 3, wherein the organic fiber is provided with a protective layer for preventing the organic fiber from being decomposed by the photocatalyst. The photocatalyst carrier according to any one of claims 1 to 4, wherein the organic fiber is a polyamide fiber, a polyethylene fiber, a polyester fiber, a phenol fiber, an acrylic fiber, or a polyvinyl alcohol fiber.

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