WO2007023558A1 - Photo-catalyseur à l'oxyde de tungstène, son procédé de production et tissu de fibres ayant une fonction de désodorisation/antisalissure - Google Patents

Photo-catalyseur à l'oxyde de tungstène, son procédé de production et tissu de fibres ayant une fonction de désodorisation/antisalissure Download PDF

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WO2007023558A1
WO2007023558A1 PCT/JP2005/015510 JP2005015510W WO2007023558A1 WO 2007023558 A1 WO2007023558 A1 WO 2007023558A1 JP 2005015510 W JP2005015510 W JP 2005015510W WO 2007023558 A1 WO2007023558 A1 WO 2007023558A1
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Prior art keywords
tungsten oxide
porous material
inorganic porous
photocatalyst
pores
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PCT/JP2005/015510
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English (en)
Japanese (ja)
Inventor
Yasutaro Seto
Tatsuo Nakamura
Shuichi Yonezawa
Kazuya Nishihara
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Suminoe Textile Co., Ltd.
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Priority to JP2007532000A priority Critical patent/JP5102034B2/ja
Priority to PCT/JP2005/015510 priority patent/WO2007023558A1/fr
Publication of WO2007023558A1 publication Critical patent/WO2007023558A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39—Photocatalytic properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8678—Removing components of undefined structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/076—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20776—Tungsten
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/24—Chromium, molybdenum or tungsten
    • B01J23/30—Tungsten
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity

Definitions

  • Tungsten oxide photocatalyst method for producing the same, and fiber cloth having deodorizing and antifouling function
  • the present invention relates to a tungsten oxide photocatalyst that responds to visible light to exhibit a sufficient deodorizing effect and the like, and a method for producing the same.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2002-282704
  • Patent Document 2 Japanese Patent Application Laid-Open No. 10-1879
  • titanium oxide photocatalyst While the titanium oxide photocatalyst is responsive to ultraviolet light, its photocatalytic activity under visible light is extremely low, so that it is used, for example, when it is used indoors with a small amount of ultraviolet light. Sufficient deodorizing effect can not be obtained.
  • New photocatalysts such as nitrogen-doped titanium oxide and oxygen-deficient titanium oxide have been developed that allow this titanium oxide photocatalyst to respond on the visible light side, but advanced manufacturing technology is required to manufacture these photocatalysts. As a result, the cost is very high.
  • oxidation as a visible light responsive photocatalyst Tungsten is known for its deodorizing performance is insufficient.
  • the present invention has been made in view of the strong technical background, and has excellent photocatalytic activity as a visible light responsive photocatalyst and exhibits a sufficient deodorizing'antifouling effect etc. It is an object of the present invention to provide a low cost tungsten oxide photocatalyst, a method for producing the same, and a fiber fabric that exhibits sufficient deodorizing and antifouling functions in response to visible light.
  • the present invention provides the following means.
  • a tungsten oxide based photocatalyst characterized in that tandastane oxide is supported in the pores of an inorganic porous material having an average pore diameter of 0.4 to 40 nm.
  • a tungsten oxide based photocatalyst characterized in that tungsten oxide is supported on the surface and pores of an inorganic porous material having an average pore diameter of 0.4 to 40 nm.
  • the tungsten oxide in the pores becomes a tungsten oxide by heating and calcining in a state in which a solution of a tungsten compound is contained in the pores of the inorganic porous material.
  • [8] including a solution of a tungsten compound in pores of an inorganic porous material having an average pore size of 0.4 to 40 nm;
  • the tungsten compound is converted into oxidized tandasten by heating and firing in the inclusion state to support tungsten oxide in the pores of the inorganic porous material.
  • a method of producing a tungsten oxide based photocatalyst comprising:
  • a deodorant characterized in that the tungsten oxide photocatalyst according to any one of the above items 1 to 7 or 13 is fixed to at least a part of a fiber fabric by a binder resin. Fiber cloth having antifouling function.
  • the tungsten oxide photocatalyst according to the invention of [1] and [2] has tungsten oxide supported in the pores of the inorganic porous material having an average pore diameter of 0.4 to 40 nm.
  • the photocatalytic activity of the tungsten oxide is extremely high, so that the tungsten oxide photocatalyst exhibits a very excellent deodorizing effect, antifouling effect and the like.
  • oxidized tandastane is a visible light responsive photocatalyst, it exhibits sufficient deodorizing effect, antifouling effect, etc. even when used indoors with a small amount of ultraviolet light.
  • the tungsten oxide in the pores is a solution of a tungsten compound as an inorganic substance. Since the tungsten compound is converted into tungsten oxide and supported in the pores by heating and calcining in the state of being contained in the pores of the porous substance, it is possible to be contained in the pores of the inorganic porous substance.
  • the supported tungsten oxide is sufficiently micronized.
  • a hydrophobic inorganic porous material is used as the inorganic porous material, and the hydrophobic inorganic porous material is a hydrophobic strong ring, an aromatic ring such as toluene or xylene. Since it is easy to attract V ⁇ C, it is possible to decompose and remove VOCs with aromatic rings such as toluene and xylene at high efficiency by oxidizing tan- dastene supported in the pores of the inorganic porous material.
  • hydrophobic zeolite is used as the inorganic porous material, and this hydrophobic zeolite is very easy to attract VOCs having strong aromatic rings such as toluene and xylene.
  • the tungsten oxide carried in the pores of the inorganic porous material can decompose and remove VOCs having an aromatic ring such as toluene and xylene with higher efficiency.
  • the one in which tungsten oxide is supported in the pores of the inorganic porous material having an average pore diameter of 0.4 to 40 nm (tungsten oxide based photocatalyst) is efficiently produced. be able to. Since tan dustene is supported in the pores of the inorganic porous material having an average pore size of 0.4 to 40 nm, the photocatalytic activity of the tungsten oxide is extremely high, and thus the tungsten oxide photocatalyst is Demonstrates very good deodorizing effect, antifouling effect, etc. In addition, since tungsten oxide is a visible light responsive photocatalyst, it exhibits sufficient deodorizing effect, antifouling effect and the like even when it is used indoors with a small amount of ultraviolet light.
  • a hydrophobic inorganic porous material is used as the inorganic porous material. Since this hydrophobic inorganic porous material easily attracts V o C having a strong hydrophobic aromatic ring such as toluene, xylene, etc., in the obtained photocatalyst, the oxidation carried by the pores of the inorganic porous material is caused. Tungsten can decompose and remove VOCs with aromatic rings such as toluene and xylene with high efficiency.
  • hydrophobic zeolite is used as the inorganic porous material. Since this hydrophobic zeolite is very easy to attract VOC having aromatic ring such as strong hydrophobic toluene, xylene, etc., in the obtained photocatalyst, the oxidation supported in the pores of the inorganic porous material is caused. Tungsten can decompose and remove VOCs having aromatic rings such as toluene and xylene with high efficiency.
  • the heating temperature at the time of heating and firing is set to 250 to 1500 ° C.
  • the tungsten compound can be converted to tungsten oxide with sufficient conversion efficiency.
  • the Noinder resin is adhered to the fiber fabric in a substantially reticulated manner, whereby the fibers constituting the fiber fabric can move relatively freely. cloth Sufficient flexibility can be secured as a navel. Furthermore, it is possible to leave a space (room) as a part for imparting other functions other than deodorizing and antifouling to the fiber fabric, for example, to impart other functions such as flame retardancy, water repellency, oil repellency, etc. It is possible, and there is an advantage that further multifunctionalization can be achieved in this way.
  • FIG. 1 is a graph showing an absorption spectrum of the tungsten oxide based photocatalyst obtained in each example.
  • FIG. 2 is a graph showing the results of the endurance performance test of the tungsten oxide photocatalyst of the present invention.
  • FIG. 3 is a schematic cross-sectional view showing an embodiment of the fiber cloth according to the present invention.
  • the tungsten oxide based photocatalyst according to the present invention is obtained by supporting tungsten oxide in pores of an inorganic porous material having an average pore diameter of 0.4 to 40 nm.
  • the tungsten oxide is supported in the pores of the inorganic porous material having an average pore diameter of 0.4 to 40 nm, the photocatalytic activity of the supported tungsten oxide is extremely high, and hence the oxidation Tungsten-based photocatalysts exhibit very excellent deodorizing effects, antifouling effects, and the like.
  • the present tungsten oxide photocatalyst has a sufficient amount of deodorizing effect, antifouling effect, etc. even when it is used indoors with a small amount of ultraviolet light. Demonstrate.
  • the photocatalytic activity of the supported tungsten oxide is significantly reduced.
  • Tungsten oxide may be supported at a location (for example, the surface) other than the inside of the pores in the inorganic porous material.
  • a location for example, the surface
  • the tungsten oxide based photocatalyst is fixed by a binder resin to at least a part of the fiber fabric as described later, from the viewpoint of preventing the decomposition of the binder resin by the photocatalytic action of tungsten oxide.
  • the amount of the tungsten oxide photocatalyst supported on the surface of the inorganic porous material other than in the pores is small or zero.
  • the above-mentioned tungsten oxide is not particularly limited, but may be heated and fired in a state in which a solution of a tungsten compound is contained in the pores of the inorganic porous material. It is preferable to use one in which the compound is tungsten oxide and is supported in the pores. When this configuration is adopted, tungsten oxide supported in the pores of the inorganic porous material is sufficiently micronized, which can contribute to further improvement of the photocatalytic activity.
  • tungsten oxide one having a structure in which platinum metal such as platinum, palladium, rhodium or the like is supported to enhance its photocatalytic activity may be used, or silver or copper may be used.
  • the inorganic porous material is not particularly limited, but it is preferable to use a hydrophobic inorganic porous material. Since this hydrophobic inorganic porous material has a good affinity for VOCs (volatile organic compounds) having aromatic rings such as toluene and xylene, and it is easy to attract VOCs having these aromatic rings, tungsten oxide There is an advantage that VOCs having aromatic rings such as toluene and xylene can be decomposed and removed with high efficiency by photocatalysis.
  • VOCs volatile organic compounds
  • the hydrophobic inorganic porous material is not particularly limited.
  • hydrophobic zeolite, activated carbon, alumina porous particles whose surface is coated with a fluorine resin, porous surfaces whose surface is coated with a water repellent agent Quality silicon oxide etc. are mentioned.
  • the intermediate product generated by the decomposition action of tungsten oxide (photocatalyst) can be adsorbed and captured more efficiently by this hydrophobic zeolite.
  • hydrophobic zeolite is white, it is advantageous in applications such as interior textiles where color and design are important.
  • the aforementioned "hydrophobic The “organic porous material” does not include the water-absorbing inorganic porous material.
  • hydrophobic zeolite it is particularly preferable to use one having a Si ⁇ / Al molar ratio of 30 or more. It is a hydrophobic zeolite having a Si ⁇ / Al 2 O molar ratio of 60 or more.
  • hydrophobic zeolite for example, a method of directly synthesizing a high SiZAl ratio zeolite such as silicalite, a method of removing A1 in the framework of zeolite by post-treatment, and modification of surface silanol group of zeolite Methods etc.
  • a method of removing A1 in the framework of zeolite by post treatment a method of hydrothermally treating NH + -type or H + -type zeolite at a high temperature and then acid treatment, a method of directly removing A1 by acid treatment, in an aqueous EDTA solution
  • Methods of treatment with Further, as a method of modifying the surface silanol group of zeolite there is a method of introducing an alkyl group (hydrophobic group) by reaction with an alkylsilane or alcohol.
  • the average particle size of the inorganic porous material is preferably 0.05 to 30 x m. Those with a particle diameter of 0.5 ⁇ m or more are easy to manufacture and low cost, and by being 30 ⁇ m or less, for example, when applied to a fiber fabric, the texture of the fiber fabric is soft and good. It is possible to make it into a state S.
  • the supported amount of the tungsten oxide is preferably 20 to 150 parts by mass with respect to 100 parts by mass of the inorganic porous material.
  • the amount is less than 20 parts by mass, the UV spectrum of tungsten oxide supported in the pores of the inorganic porous material is shifted to the short wavelength side (ultraviolet light region), and it has almost no absorption in the visible light region. It is not preferable because the expression of photocatalytic activity by visible light becomes insufficient.
  • the amount is more than 150 parts by mass, a large amount of the inorganic porous material is necessarily supported not only in the pores of the inorganic porous material but also on the outer surface, or the proportion of tungsten oxide crystallized alone increases. Since the fiber base material and the binder resin will be decomposed a lot, it is preferable.
  • the loading amount of the tungsten oxide is more preferably 25 to 80 parts by mass with respect to 100 parts by mass of the inorganic porous material.
  • a solution of a tantalum compound is included in the pores of the inorganic porous material having an average pore size of 0.4 to 40 nm.
  • the inorganic porous material is a tungsten compound
  • the solution of tungsten compound is included in the pores of the inorganic porous material by immersing in the solution of Examples of the solution of the tungsten compound include an aqueous solution of a tungsten compound and an alcohol solution of the tungsten compound.
  • the concentration of the tungsten compound in the solution of the tungsten compound is not particularly limited, it is preferable to set in the range of 10 to 50% by mass.
  • the tungsten compound is not particularly limited as long as it becomes tungsten oxide by heating and firing, and examples thereof include ammonium metatungstate, tungsten ethoxide, tungstic acid, ammonium tungstate parapentahydrate, and tandust silicic acid. Hydrate, tandust silicic acid ammonium hydrate, sand dust sodium silicate hydrate, sand dust phosphoric acid hydrate, sand dust phosphoric acid ammonium hydrate, sand dust sodium phosphate hydrate, etc. It becomes tungsten oxide by heating and firing over ° C.
  • the inorganic porous material including the solution of the tungsten compound in the pores is heated and calcined to convert the tungsten compound into tungsten oxide, thereby supporting the tungsten oxide in the pores of the inorganic porous material. Do. In this way, a tungsten oxide based photocatalyst in which tungsten oxide is supported in the pores of the inorganic porous material is obtained.
  • the heating temperature at the time of the heating and firing is preferably set to 250 to 1500 ° C.
  • the tungsten compound can be converted to tungsten oxide at a sufficient conversion rate, and by setting the temperature to 1,500 ° C. or lower, the energy cost of firing can be reduced.
  • the tungsten oxide photocatalyst of the present invention is not particularly limited to one produced by the above-described production method.
  • the fiber cloth (1) having a deodorizing and antifouling function according to the present invention has at least one of the fiber cloth (2) Also in part, the tungsten oxide photocatalyst (3) having the above-described structure is fixed by the binder resin (4) (see FIG. 3).
  • the binder resin is not particularly limited, and examples thereof include acrylic resins, urethane resins, and acrylic silicone resins.
  • the adhesion amount of the tungsten oxide photocatalyst to the fiber fabric is preferably from 0.:! To 50 parts by mass with respect to 100 parts by mass of the fiber fabric.
  • the content is 50 parts by mass or less, the texture of the fabric can be softened, and when the content is 0.1 parts by mass or more, the photocatalytic action can be sufficiently exhibited.
  • the adhesion amount of the tungsten oxide photocatalyst to the fiber fabric is more preferably 0.3 to 20 parts by mass with respect to 100 parts by mass of the fiber fabric.
  • the adhesion amount of the binder resin to the fiber cloth is preferably 0.05 to 50 parts by mass with respect to 100 parts by mass of the fiber cloth. While the texture of the fabric can be made soft by being 50 parts by mass or less and sufficient fixing power can be secured by making it 0.50 parts by mass or more, the falling off of the tungsten oxide photocatalyst can be effectively prevented. can do. Among them, the adhesion amount of the binder resin to the fiber fabric is more preferably 0.15 to 20 parts by mass with respect to 100 parts by mass of the fiber fabric.
  • the fiber cloth (1) having a deodorizing and antifouling function of the present invention is produced, for example, as follows. That is, after a treatment liquid containing the above-mentioned tungsten oxide photocatalyst (having porous titanium oxide supported in pores of the inorganic porous material) and a binder resin is attached to at least a part of the fiber fabric, It can be manufactured by drying.
  • the application of the treatment liquid is performed by, for example, a dipping method, a coating method, or the like.
  • the immersion method for example, after immersing the fiber cloth in a treatment liquid containing the tungsten oxide photocatalyst and the binder resin, a method of squeezing the cloth with a mundal and drying can be exemplified. If manufactured by this immersion method, there is an advantage that the tungsten oxide photocatalyst and the binder resin can be fixed to the fiber cloth in a uniform state.
  • An example of the coating method is a method in which a treatment liquid containing the tungsten oxide photocatalyst and binder resin is applied to at least a part of a fiber fabric and coated, and then dried. If manufactured by this coating method, productivity will be There is an advantage that it can be significantly improved and the amount of adhesion can be controlled with high accuracy. In addition, in this coating method, it is possible to bond the binder resin in a substantially mesh shape. Specific examples of the coating method include, but not particularly limited to, gravure roll method, transfer printing method, screen printing method and the like.
  • the proportion of each component in the treatment liquid is not particularly limited, but if the amount of the binder resin is too large with respect to the amount of the photocatalyst, the ratio of covering the surface of the photocatalyst with the binder resin increases. It is not preferable because the deodorizing and antifouling effects are reduced.
  • the preferred content is 50 to 500 parts by mass of the tungsten oxide photocatalyst relative to 100 parts by mass of the binder resin.
  • the fiber fabric (2) is not particularly limited, and examples thereof include woven fabric, knitted fabric, non-woven fabric, napped fabric (tuffed force mesh, moquette etc.) and the like.
  • the kind, form, etc. of the fiber which comprises the said fiber fabric are not specifically limited.
  • the fibers constituting the fiber fabric include synthetic fibers such as polyester, polyamide and acrylic, semi-synthetic fibers such as acetate and rayon, and natural fibers such as wool, silk, cotton and hemp. You may employ
  • the supported amount of tungsten oxide was 00 parts by mass with respect to 00 parts by mass.
  • Hydrophobic zeolite Si Al / Al 2 O 3 ratio: 1500 having an average pore diameter of 0.6 nm and an average particle diameter of 5 / im in 1 L of an aqueous solution of ammonium tungstate having a concentration of 30% by mass 246
  • Hydrophobic zeolite Si Si / Al 2 O 3 ratio: 1500
  • the UV absorption spectrum of the tungsten oxide based photocatalyst obtained in Examples 1, 5 and 7 is shown in FIG. It can be seen from FIG. 1 that as the amount of tungsten oxide supported in the pores increases, the absorption in the visible light region increases and the resorption increases.
  • Tungsten oxide photocatalyst was placed in a bag with a content of 5 L so that the amount of tungsten oxide was 0.2 g, and then acetaldehyde gas was injected into the bag so that the concentration was 200 ppm. .
  • acetaldehyde gas was injected into the bag so that the concentration was 200 ppm. .
  • the amount of carbon dioxide gas generated by the decomposition of aldehyde was measured, and based on this, the amount of carbon dioxide gas generated per hour was measured.
  • toluene gas is injected into the bag so that the concentration becomes 200 ppm.
  • place this bag 30 cm directly under a fluorescent lamp (using UV cut filter with a wavelength shorter than 390 nm, illuminance 6,000 norethex), and after 4 hours, use toluene The amount of carbon dioxide gas generated by the decomposition of the carbon dioxide was measured, and the amount of carbon dioxide gas generated per hour was measured based on this.
  • the tungsten oxide photocatalysts of Examples 1 to 7 according to the present invention were able to exhibit excellent decomposition performance with respect to acetaldehyde and toluene under visible light irradiation.
  • the photocatalyst of Comparative Example 1 in which oxidized tandasten is supported in the pores of the inorganic porous material having an average pore diameter of 0.3 nm, the decomposition performance is insufficient under visible light irradiation. Met.
  • the photocatalyst of Comparative Example 2 in which oxidized tungsten is supported in the pores of the inorganic porous material having an average pore diameter of 50 nm also has insufficient decomposition performance under visible light irradiation.
  • the degradation performance of the oxidized tandasten-based photocatalyst of the present invention is excellent in the durability of the degradation performance without any deterioration. I understand.
  • Example 2 After 10 parts by mass of the tungsten oxide based photocatalyst of Example 1 was mixed with 84 parts by mass of water, the mixture was sufficiently stirred by a stirrer to obtain a dispersion. 6 parts by mass of an acrylic resin (solid content: 50% by mass) was added to the dispersion, and the mixture was sufficiently stirred to obtain a uniform dispersion treatment liquid. A polyester spunbond non-woven fabric (40 g / m 2 basis weight) is dipped in this dispersion treatment solution, taken out, squeezed with a mandarin, and dried to obtain a fiber fabric having a deodorizing and antifouling function (Fig. 3 Reference) got.
  • the adhesion amount of the tungsten oxide photocatalyst to the fiber fabric was 3 parts by mass with respect to 100 parts by mass of the fiber fabric.
  • the adhesion amount of the binder resin to the fiber cloth was 1 part by mass with respect to 100 parts by mass of the fiber cloth.
  • Example 8 In the same manner as in Example 8 except that the tungsten oxide photocatalyst of Example 2 was used as the tungsten oxide photocatalyst, a fiber cloth having a deodorizing and antifouling function was obtained.
  • Example 8 In the same manner as in Example 8 except that the tungsten oxide photocatalyst of Example 3 was used as the tungsten oxide photocatalyst, a fiber cloth having a deodorizing and antifouling function was obtained.
  • a fiber cloth having a deodorizing and antifouling function was obtained in the same manner as in Example 8 except that the tungsten oxide photocatalyst of Example 4 was used as the tungsten oxide photocatalyst.
  • a fiber cloth having a deodorizing and antifouling function was obtained in the same manner as in Example 8 except that the tungsten oxide photocatalyst of Comparative Example 1 was used as the tungsten oxide photocatalyst.
  • Comparative Example 4 In the same manner as in Example 8 except that the tungsten oxide photocatalyst of Comparative Example 2 was used as the tungsten oxide photocatalyst, a fiber cloth having a deodorizing and antifouling function was obtained.
  • test pieces (10 ⁇ 10 cm square) cut out from each fiber cloth were placed in a bag having an inner volume of 5 L, and then acetaldehyde gas was injected so that the concentration was 200 ppm in the bag.
  • acetaldehyde gas was injected so that the concentration was 200 ppm in the bag.
  • the amount of carbonic acid gas generated by the decomposition of the binder resin was measured, and based on this, the amount of carbon dioxide gas generated per hour (X) was measured.
  • the amount of carbon dioxide gas generated per hour (the amount of carbonic acid gas generated by the decomposition of the binder resin) Y) was measured. Therefore, the amount of carbon dioxide gas generation derived from the decomposition of acetaldehyde was calculated by (X-Y).
  • the deodorant / antifouling fiber fabric of Examples 8 to 11 of the present invention exhibits excellent decomposition performance to acetaldehyde under visible light irradiation. did it.
  • the binder resin is hardly decomposed by the photocatalyst substantially.
  • the binder resin was decomposed by the photocatalyst in the fiber fabric of Comparative Example 3 using the tungsten oxide photocatalyst produced by using an inorganic porous material with an average pore diameter of 0.3 nm.
  • the tungsten oxide photocatalyst according to the present invention is not particularly limited, but examples are For example, it is used as a deodorant, an antibacterial agent, a sterilizer, an antifouling agent, a waste water treatment agent, a water purification treatment agent and the like.
  • the fiber cloth having deodorizing and antifouling functions according to the present invention is not particularly limited.

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Abstract

La présente invention concerne un photo-catalyseur à l'oxyde de tungstène qui présente une excellente activité photo-catalytique en tant que photo-catalyseur réactif à la lumière visible, qui exerce des effets satisfaisants de désodorisation/antisalissure, etc., et qui est disponible à faible coût. L'invention concerne un photo-catalyseur à l'oxyde de tungstène qui est caractérisé par le fait que l'oxyde de tungstène est supporté dans les pores d'une substance poreuse inorganique dont les pores ont un diamètre moyen de 0,4 à 40 nm.
PCT/JP2005/015510 2005-08-26 2005-08-26 Photo-catalyseur à l'oxyde de tungstène, son procédé de production et tissu de fibres ayant une fonction de désodorisation/antisalissure WO2007023558A1 (fr)

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JP2007532000A JP5102034B2 (ja) 2005-08-26 2005-08-26 酸化タングステン系光触媒及びその製造方法並びに消臭・防汚機能を有する繊維布帛
PCT/JP2005/015510 WO2007023558A1 (fr) 2005-08-26 2005-08-26 Photo-catalyseur à l'oxyde de tungstène, son procédé de production et tissu de fibres ayant une fonction de désodorisation/antisalissure

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JP2020025941A (ja) * 2018-08-17 2020-02-20 地方独立行政法人東京都立産業技術研究センター 光触媒およびその製造方法
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