WO2005044447A1 - 複合酸化型チタニア系光触媒及びその用途 - Google Patents
複合酸化型チタニア系光触媒及びその用途 Download PDFInfo
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- WO2005044447A1 WO2005044447A1 PCT/JP2004/015945 JP2004015945W WO2005044447A1 WO 2005044447 A1 WO2005044447 A1 WO 2005044447A1 JP 2004015945 W JP2004015945 W JP 2004015945W WO 2005044447 A1 WO2005044447 A1 WO 2005044447A1
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- based photocatalyst
- sample
- photocatalyst
- titer
- resin
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- 229920000297 Rayon Polymers 0.000 description 1
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- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
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- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
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- 125000005210 alkyl ammonium group Chemical group 0.000 description 1
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- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
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- 235000012501 ammonium carbonate Nutrition 0.000 description 1
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- 239000000010 aprotic solvent Substances 0.000 description 1
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- 244000052616 bacterial pathogen Species 0.000 description 1
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- 239000004067 bulking agent Substances 0.000 description 1
- QHIWVLPBUQWDMQ-UHFFFAOYSA-N butyl prop-2-enoate;methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.COC(=O)C(C)=C.CCCCOC(=O)C=C QHIWVLPBUQWDMQ-UHFFFAOYSA-N 0.000 description 1
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- 150000001768 cations Chemical group 0.000 description 1
- OZECDDHOAMNMQI-UHFFFAOYSA-H cerium(3+);trisulfate Chemical compound [Ce+3].[Ce+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O OZECDDHOAMNMQI-UHFFFAOYSA-H 0.000 description 1
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- 239000000665 guar gum Substances 0.000 description 1
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- 229960002154 guar gum Drugs 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000001863 hydroxypropyl cellulose Substances 0.000 description 1
- 235000010977 hydroxypropyl cellulose Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
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- 239000002563 ionic surfactant Substances 0.000 description 1
- 229910000358 iron sulfate Inorganic materials 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 description 1
- 229940094506 lauryl betaine Drugs 0.000 description 1
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- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- DVEKCXOJTLDBFE-UHFFFAOYSA-N n-dodecyl-n,n-dimethylglycinate Chemical compound CCCCCCCCCCCC[N+](C)(C)CC([O-])=O DVEKCXOJTLDBFE-UHFFFAOYSA-N 0.000 description 1
- 239000000025 natural resin Substances 0.000 description 1
- XNHGKSMNCCTMFO-UHFFFAOYSA-D niobium(5+);oxalate Chemical compound [Nb+5].[Nb+5].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O XNHGKSMNCCTMFO-UHFFFAOYSA-D 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
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- 229920001778 nylon Polymers 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid group Chemical group C(CCCCCCC\C=C/CCCCCCCC)(=O)O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
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- IYVLHQRADFNKAU-UHFFFAOYSA-N oxygen(2-);titanium(4+);hydrate Chemical compound O.[O-2].[O-2].[Ti+4] IYVLHQRADFNKAU-UHFFFAOYSA-N 0.000 description 1
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- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
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- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000003586 protic polar solvent Substances 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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- 239000005368 silicate glass Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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- 229920002050 silicone resin Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
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- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 125000001174 sulfone group Chemical group 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000009283 thermal hydrolysis Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
- JLGLQAWTXXGVEM-UHFFFAOYSA-N triethylene glycol monomethyl ether Chemical compound COCCOCCOCCO JLGLQAWTXXGVEM-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 238000002371 ultraviolet--visible spectrum Methods 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 238000004876 x-ray fluorescence Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 235000019352 zinc silicate Nutrition 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- 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
- B01J23/20—Vanadium, niobium or tantalum
-
- 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
- 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
- B01J35/70—Catalysts, in general, characterised by their form or physical properties characterised by their crystalline properties, e.g. semi-crystalline
-
- 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
- B01J35/70—Catalysts, in general, characterised by their form or physical properties characterised by their crystalline properties, e.g. semi-crystalline
- B01J35/77—Compounds characterised by their crystallite size
-
- 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- 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
- B01J2235/00—Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
-
- 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
- B01J2235/00—Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- B01J2235/10—Infrared [IR]
-
- 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
- B01J2235/00—Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- B01J2235/15—X-ray diffraction
-
- 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
- B01J2235/00—Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
- B01J2235/30—Scanning electron microscopy; Transmission electron microscopy
-
- 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
- B01J35/63—Pore volume
- B01J35/635—0.5-1.0 ml/g
Definitions
- the present invention relates to a photocatalyst that also has a photocatalytic activity by visible light and can suppress the resin degradation action as compared with conventional photocatalysts.
- Photocatalysts that undergo a chemical reaction upon irradiation with light include a photocatalyst, which is known to decompose and purify waste, deodorize by decomposing gas molecules that cause malodor, and synthesize hydrogen by decomposing water. Have been.
- Such photocatalysts have been spotlighted because of their convenience, and are used by kneading them into fats or adding them to paints.
- a photocatalyst is kneaded into a resin or added to a paint, these substrates are decomposed and deteriorated by the photocatalytic action, causing discoloration, poor processing, a reduction in resin strength, and the like, and their applications are limited.
- yarn breakage occurs during spinning, drawing and knitting, making it impossible to produce a product.
- a photocatalyst is carried inside porous particles such as silica zeolite or between layers of a layered conjugate to reduce poisoning by reducing the contact area with resin (for example, see Patent Document 1).
- Patent Documents 2 and 3 an attempt to reduce the contact area with resin by coating a porous ceramic on the surface of the photocatalyst particles (see Patent Document 4 and Patent Document 5, for example) .
- these photocatalysts cannot not only obtain sufficient photocatalytic performance (oxidative decomposability upon light irradiation), but also have little effect on the processability of fibers due to the difficulty in controlling the particle size. Furthermore, it was a power that could not sufficiently suppress fat coloring.
- Patent Document 7 A method for producing an anatase-type titanium oxide in the presence of a compound that generates ammonia by thermal hydrolysis in an aqueous solution containing a metal component such as vanadium has been reported (eg, For example, see Patent Document 7).
- This patent document describes the use of Group Vb of the periodic table containing niobium. However, what is produced by this production method is used for a catalyst carrier and the like.
- Non-Patent Document 1 For example, see Non-Patent Document 1). This report mentions photocatalytic activity. NbO coating on calcined titanium oxide improves photocatalytic activity
- Patent Document 1 Japanese Patent Application Laid-Open No. 11 33100 (Claims)
- Patent Document 2 Japanese Patent Application Laid-Open No. 2000-355872 (Claims)
- Patent Document 3 Japanese Patent Application Laid-Open No. 2000-354768 (Claims)
- Patent Document 4 JP-A-09-225319 (Claims)
- Patent Document 5 Japanese Patent Application Laid-Open No. 2001-286728 (Claims)
- Patent Document 6 JP-A-09-267037 (Claims)
- Patent Document 7 Japanese Patent Application Laid-Open No. 07-267641 (Claims)
- Non-patent Document 1 Masasuke Takada, et al., "Effects of Addition of A1203 and Nb205 on Electrical Conductivity of Ti02 Sintered Body", Journal of the Ceramic Society of Japan, 1976, Vol. 84, No. 5, p. 237-241
- Non-Patent Document 2 J Solid State Chem., 1995, 115, ⁇ 187-
- the present invention is a composite oxide type niobium titer-based photocatalyst having a niobium content of 0.1 to 25 mol% with respect to titanium.
- the composite oxidation type titanium has a pore volume of 0.05 to 10 cm 3 Zg and a crystallite diameter of 5 to 100 nm.
- the composite oxidation type titanium-based photocatalyst contains a brookite-type crystal phase.
- the composite oxidized titanium - ⁇ based photocatalysts which may be in 0.01 containing one 20 mole 0/0 trivalent atom to titanium atom, the trivalent atom of aluminum, cerium, of iron At least one thing.
- the composite oxidation type titanium-based photocatalyst has at least one or more near infrared infrared absorption peaks of 5400 to 4400 cm 1 , and more preferably has at least two absorption peaks.
- the composite oxidized titer-based photocatalyst contains an anatase crystal
- the a-axis lattice constant of the anatase crystal is 3.775-3.95 A and the c-axis lattice constant is 9.46-1. 10 A thing.
- the composite oxidized titanium-based photocatalyst contains a rutile crystal
- the lattice constant of the a-axis of the rutile crystal is 4.598-4.668A
- the lattice constant of the c-axis is 2.96-3. . 2A.
- the present invention is a titer-based photocatalyst composition containing the composite oxidation-type titania-based photocatalyst, a compounding agent, and Z or another photocatalyst.
- the present invention is a product containing the composite oxidation-type titania-based photocatalyst or the above-described titania-based photocatalyst composition.
- the present invention is a functional dispersion containing the composite oxidation-type titer-based photocatalyst or the titer-based photocatalyst composition, and a functional processed product obtained by using the functional dispersion.
- a functional resin composition obtained by kneading the composite oxidation-type titer-based photocatalyst or the titer-based photocatalyst composition, and a fiber, sheet, film or film containing the functional resin composition is provided. It is a molded product.
- the composite oxidation type titania-based photocatalyst of the present invention exhibits excellent photocatalytic performance under visible light, for example, under a commercially available fluorescent lamp. Therefore, unlike the general photocatalyst, the composite oxidized titaure-based photocatalyst of the present invention has antifouling properties, antibacterial properties, toxic gases such as aldehyde gas, and toxic gases and the like in homes and the like where ultraviolet irradiation is extremely low. Can decompose It can be used for environmental purification and pollution prevention.
- the titer-based photocatalyst of the present invention is a complex oxidized type titer-based photocatalyst that causes less coloring of the resin during compounding.
- this is referred to as a titania-based photocatalyst.
- the mole% of the niobium content in the titer-based photocatalyst was calculated from the following formula based on the mole value of the titanium atom and the mole value of the niobium atom in the titer-based photocatalyst.
- 0.1 to 25 mol% is preferred to obtain the effect of reducing the coloring of fat and the photocatalytic activity by visible light. More than 1 mol% to 22 mol% is preferred, and 3 to 20 mol% is more preferred. Particularly preferred is 415 mol%.
- the content of niobium in the titer-based photocatalyst is less than 0.1 mol%, the effect of reducing the coloring of the resin is hardly obtained. In particular, when the content is less than 3 mol%, the effect of reducing the coloring of the resin is hardly obtained.
- the niobium content in the titer-based photocatalyst is more than 25 mol%, it is not preferable because it is disadvantageous in terms of cost that the effect of reducing coloring of the resin and the photocatalytic activity by visible light are increased.
- a trivalent atom can be added to the titer-based photocatalyst in addition to the titanium atom and the niobium atom.
- Preferred examples of the trivalent atom include aluminum, cerium, and iron, and it is preferable that at least one of these trivalent atoms is included in the titer-based photocatalyst. More preferred as the trivalent atom are aluminum and Z or cerium, and particularly preferred is aluminum.
- Monore 0/0 force S preferably further 1 one 18 Monore 0/0 power S, most preferably from 2 one 15 mol%.
- niobium, trivalent atoms, and the like form a complex oxide that cannot be a mixture.
- components other than titanium, niobium, and trivalent atoms may be in a range that does not greatly affect the effects of the present invention.
- the titer-based photocatalyst of the present invention is a porous composite oxide, and is characterized in that it has a disk shape in which the central portion swells in a convex shape on both sides.
- the size of the titer-based photocatalyst is preferably from 0.01 to 10 / z m, and more preferably from 0.3 to 4 / z m in consideration of the dispersion in resin and the strength of the resin. Whether the porous body is a titanium-based photocatalyst can be confirmed by the hysteresis force of the nitrogen adsorption / desorption amount when the relative pressure of nitrogen mixed with helium is changed.
- the pore volume In order to obtain an excellent photocatalytic effect in a titania-based photocatalyst, the pore volume must be 0.0.
- the average pore diameter of the titer-based photocatalyst is preferably 3 to 80 nm, more preferably 5 to 50 nm, and still more preferably 6 to 40 nm.
- the crystallite size of the titer-based photocatalyst can be determined by precisely separating peaks from a powder X-ray diffraction pattern and calculating by the Rietveld method, or by a transmission electron microscope.
- the crystallite diameter of the titer-based photocatalyst is preferably 5-100 nm, more preferably 7-500 nm, and particularly preferably 10-200 nm. If the crystallite diameter of the titer-based photocatalyst is too large, the specific surface area may decrease, and the reaction efficiency as a photocatalyst may decrease.If the crystallite diameter is too small, the crystals may condense during drying and the like. The diameter increases, and there is a possibility that defects may occur during processing as a coating film or a molded body.
- the crystal form of the titer-based photocatalyst of the present invention is a brookite-type crystal phase which may contain an anatase type crystal and a Z or rutile type crystal from a powder X-ray diffraction pattern.
- the titer-based photocatalyst may preferably include only an anatase-type crystal and a Z- or rutile-type crystal, which is preferably only a brookite-type crystal. If the ratio is small, it may be acceptable to include amorphous.
- Chita present invention - ⁇ based photocatalysts be subjected to pyridine adsorption treatment 1420- 1460cm 1 And no absorption peak at 1590-1620cm- 1 .
- Titania-based photocatalysts that show no absorption peak at a specific wavelength even after such pyridine adsorption treatment have few Lewis acid sites, which are considered to be the cause of resin degradation. That is, the titer-based photocatalyst of the present invention has substantially no Lewis acid sites. Note that the Lewis acid point in the titer-based photocatalyst indicates a place that acts as a Lewis acid on the titania-based photocatalyst.
- the titer-based photocatalyst of the present invention comprises an aqueous titanium solution (for example, titanium sulfate or titanium sulfate dissolved in water) and an aqueous niobium solution (for example, a solution obtained by dissolving niobium pentoxide niobium in water using shinic acid or the like). )
- a titanium-based photocatalyst can be obtained by heating a mixture of an aqueous titanium solution, an aqueous niobium solution, and an aqueous solution of a trivalent atomic salt.
- the heating time for obtaining the titer-based photocatalyst should be a time during which the titer-based photocatalyst precipitates.
- the heating time is, for example, 11 to 300 hours.
- the amount of oxalic acid relative to niobium pentoxide or niobium when preparing the aqueous niobium solution is preferably equimolar to niobium, more preferably about 10 times mol, more preferably more than equimolar to 15 times mol.
- the aqueous solution of a trivalent atom salt is a solution in which a salt of a trivalent atom is dissolved in water.
- a trivalent salt solution of nitric acid or a trivalent salt solution of sulfuric acid can be used.
- Specific examples include aluminum nitrate, cerium nitrate, iron nitrate, aluminum sulfate, cerium sulfate, and iron sulfate.
- the pH of the mixed solution may be adjusted using an alkali.
- a substance that generates an alkali by thermal decomposition may be used (for example, urea or hexamethylenetetramine).
- the pH may be adjusted using an alkali.
- alkali used examples include an alkali metal hydroxide, an alkaline earth metal hydroxide, an alkali metal carbonate, an alkaline earth metal carbonate, an alkali metal bicarbonate, and an alkaline earth metal.
- Bicarbonate, ammonia salt e.g., aqueous ammonia, Examples thereof include ammonium, ammonium acetate, urea, and hexamethylenetetramine, and these may be used alone or in combination of two or more.
- alkali metals lithium, sodium and potassium are preferred, and lithium is particularly preferred.
- alkaline earth metals calcium, strontium, and calcium are more preferred, and calcium is more preferred.
- alkaline earth metals and alkali metals alkali metals are preferred.
- inorganic alkalis such as alkali metals and ammonia salts, ammonia salts are preferable.
- ammonia salt ammonium carbonate, urea and hexamethylenetetramine are preferred.
- the temperature of the heat treatment of the mixed solution when producing the titer-based photocatalyst is preferably from 50 to 150 ° C, more preferably from 60 to 120 ° C, and still more preferably from 65 to 105 ° C. . If the temperature of the heat treatment is 50 ° C. or lower, the crystallinity of the generated titania-based photocatalyst is likely to be reduced, so that the catalytic performance of the titania-based photocatalyst may be reduced.
- the post-heating temperature is preferably from 200 to 1200 ° C, more preferably from 300 to 1000 ° C, and still more preferably from 600 to 850 ° C. If the post-heating temperature is 200 ° C or lower, there is a possibility that residual organic components may remain even after washing, and it may not be possible to reduce the colorability at the time of mixing with the resin. When heating is performed as described above, the photocatalytic performance may be deteriorated.
- Decomposition of aldehyde gases such as formaldehyde and acetoaldehyde, and decomposition gases such as toluene, and decomposition substances such as organic compounds in solution using a titer-based photocatalyst can be.
- it is possible to further enhance the decomposition performance by mixing the titer-based photocatalyst with an adsorptive substance such as activated carbon or silica gel, or by mixing with another photocatalyst. .
- Examples of the compounding agent to be mixed with the titania-based photocatalyst include a substance that physically adsorbs the compound and a substance that chemically absorbs the compound.
- Examples of the substance that physically adsorbs the compound include a microparticle having a large specific surface area and a porous substance such as activated carbon and zeolite such as aerosil. If the specific surface area of the adsorptive substance is small, the amount of adsorbed compound will decrease. Therefore, a specific surface area of 10 m 2 / g or more is preferable because the decomposition reaction efficiency by the photocatalyst is low.
- Examples of the substance that chemically absorbs include a substance that chemically reacts with an ion exchanger or a compound to be adsorbed, or a substance that carries a substance that chemically reacts with the compound to be adsorbed.
- Examples of the substance that chemically reacts with the target compound include, for example, an amine conjugate that causes a Schiff reaction with aldehydes such as formaldehyde dimethyl aldehyde. And clay minerals having a cation exchange property.
- a functional dispersion By dispersing the titania-based photocatalyst of the present invention in a solvent, a functional dispersion can be obtained.
- the method for dispersing the titania-based photocatalyst is not particularly limited.
- a functional dispersion can be prepared by mixing a dispersion medium or the like with a high-concentration titania-based photocatalyst (forming a high-concentration paste). Further, this functional dispersion can be diluted with a dispersion medium, a diluent and a binder component to prepare a functional dispersion.
- Decomposition targets such as offensive odors in a living environment include a plurality of gases and a plurality of solutions, which are rarely single components. Therefore, it is preferable to use a plurality of compounding agents suitable for decomposing or adsorbing various target components.
- a case of a bad smell is taken as an example. It is said that the main gas of sweat odor is ammonia, acetic acid, isovaleric acid and nonenal, which is an unsaturated aldehyde.
- a deodorant for sweat odor one containing a compounding agent such as a deodorant suitable for a basic gas, a deodorant suitable for an acidic gas, and a deodorant suitable for an aldehyde gas is used. It is preferable to use them in combination. Examples of these are tetravalent metal phosphates which are insoluble or hardly soluble in water, and aluminum silicates.
- At least one compound selected from the group supports a compound having a primary amino group in the molecule. At least one compound selected from the group consisting of at least one compound selected from the group consisting of a talcite hydride compound, a hydrated talcite hydrate product, a hydrated zirconium oxide, a zirconium oxide, and a hydrated titanium oxide. It is preferable to use a combination of at least one kind and a titer-based photocatalyst.
- a deodorant suitable for a basic gas For sweat odor and excretion odor, a deodorant suitable for a basic gas, a deodorant suitable for an acidic gas, a deodorant suitable for an aldehyde gas, and a deodorant suitable for a sulfur-based gas And a functional dispersion using a titanium-based photocatalyst together.
- a functional component obtained by using a deodorant suitable for a basic gas, a deodorant suitable for an acidic gas, a deodorant suitable for an aldehyde gas, and a deodorant suitable for a sulfur-based gas in combination with a titania-based photocatalyst It is preferable to use a liquid dispersion.
- the mixing ratio of basic gas, acidic gas, aldehyde gas and sulfur-based gas is different for sweat odor, excretion odor and tobacco odor.
- the deodorant for sweat odor, excretion odor and tobacco odor is a mixture of a suitable odor component and a suitable odor component at a suitable ratio.
- a deodorant that can be used in combination with a titania-based photocatalyst is a substance carrying a compound having a primary amino group in the molecule; a tetravalent metal ring that is insoluble or hardly soluble in water.
- One or more deodorants may be used in combination.
- the activity of the photocatalyst can be imparted to the substrate by using a titania-based photocatalyst or a functional dispersion in which a composition of the titania-based photocatalyst and a compounding agent is blended.
- the solid content of the titania-based photocatalyst or the composition of the titania-based photocatalyst and the compounding agent in the functional dispersion is preferably 0.1 to 70%, more preferably 0.5 to 60%. In particular, it is preferably 115%. If the solid content in the functional dispersion is less than 0.1%, the dispersion stability may be deteriorated due to the low viscosity of the dispersion. If the solid content in the functional dispersion exceeds 70%, the viscosity of the dispersion becomes too high, which may make it difficult to produce, and the handling properties of the product may be poor.
- the content of the titanium-based photocatalyst is preferably 10 to 90%, more preferably 20 to 85%. In particular, it is preferable to contain 30-80%.
- the deviation of the method for producing the dispersion of the inorganic powder can be used.
- a titanium-based photocatalyst may be added to a dispersion medium such as water and a polymer-based dispersant, and the mixture may be stirred and dispersed by a sand mill, disperser, ball mill, or the like.
- a dispersion medium such as water
- a dispersion medium such as water
- surfactants, defoamers, preservatives, viscosity modifiers, leveling agents, binder components, antibacterial agents, antifungal agents, flame retardants, antioxidants Add a matting agent, anti-corrosion agent, coupling agent, metal powder, glass powder, fragrance, deodorant, and pigment, etc. as required, and use a sand mill, disperser, ball mill, etc. What is necessary is just to stir and disperse.
- the dispersion medium can be used without limitation, and preferably has water solubility and hydrophilicity.
- the protic solvent include water and alcohol
- examples of the aprotic solvent include dimethylformamide, dimethylacetamide, dimethylsulfoxide, tetrahydrofuran, and acetone.
- a particularly preferred dispersion medium is water.
- the polymer dispersant used in the present invention is preferably a copolymer (resin) having at least an acidic functional group.
- the basic skeleton of the polymer-based dispersant is preferably composed of an ester chain, a vinyl chain, an acryl chain, an ether chain, a Z or urethane chain, etc., and a part of hydrogen atoms in the molecule is a halogen atom. May be substituted.
- acrylic resins, polyester resins and alkyd resins are preferred, and acrylic resins and polyester resins are particularly preferred.
- the acidic functional group include a carboxyl group, a sulfone group, and a phosphate group, and among them, a phosphate group is preferable.
- the acid value of the copolymer (resin) containing an acidic functional group is preferably from 5 to 150 mgKOHZg. If the acid value is less than 5 mgKOHZg, the dispersion stability may decrease, which is not preferable. If the acid value exceeds 150 mgK OHZg, sufficient dispersion stability of the particles may not be obtained.
- the acidic functional groups may be arranged at random in the resin molecule, but those in which the acidic functional groups are arranged at the terminal portion of the molecule due to a block or graft structure have a dispersion-stable structure. Easy to take, so preferred! / ,.
- This molecular weight is preferably in the range of 500-100,000 in terms of mass average molecular weight, more preferably 750-10000. If the molecular weight is less than 500, the dispersing effect may be lowered, which is not preferable. If it is more than 100,000, coagulation action and viscosity increase may occur.
- the polymer dispersant used may be one kind or a plurality of kinds.
- the amount U of the polymer dispersant is preferably 0.1 to 15 parts by mass with respect to 100 parts by mass of the solid content of the titanium-based photocatalyst and the compounding agent. , More preferably 1 to 10 parts by mass, and particularly preferably 2 to 8 parts by mass. If the amount of the polymer-based dispersant is less than 0.1 parts by mass, dispersion may not be sufficient and reagglomeration may be easily caused. If the amount of the polymer-based dispersant is more than 15 parts by mass, dispersibility may be reduced (depression phenomenon) due to an excessive dispersant.
- any of amphoteric surfactants, aionic surfactants, and non-ionic surfactants may be used!
- amphoteric surfactants include those having a carboxylate, a sulfate, a sulfonate, or a phosphate as an a-one moiety, and an ammine salt or a quaternary ammonium salt as a cation moiety.
- the alkyl betaines include lauryl betaine, stearyl betaine, cocoamidopropyl betaine, and 2-p-decyl-hydroxyethylimidazolium betaine, each of which has a salty amino acid type.
- Examples thereof include lauryl j8-alanine, stearyl-j8-alanine, lauryl di (aminoethyl) glycine, octyldi (aminoethyl) glycine, and dioctyl (aminoethyl) glycine.
- ionic surfactant examples include higher alcohol sulfates, alkylbenzene sulfonates, and aliphatic sulfonic acids.
- non-ionic surfactant examples include an alkyl ester type, an alkyl ether type, and an alkyl phenyl ether type of polyethylene glycol.
- a single surfactant or a plurality of surfactants may be used.
- antifoaming agents include foam-breaking, foam-suppressing and defoaming agents, and any of them may be used!
- foam breaking property include a polysiloxane solution.
- any known preservatives can be used. Oleic, organotin, organoiod, thiazole, imidazole, nitrile derivatives and the like.
- known viscosity modifiers can be used with deviations.
- cellulosic thickeners such as methinoresenololose, canoleboxy methinoresenorelose, methinolehydroxycenorelose, methinole hydroxypropylcellulose, and hydroxyethylcellulose; natural polysaccharides such as gum arabic, gum trangum and guar gum Various polyacrylamide polymers; polyethylene oxide; polyvinyl alcohol.
- leveling agents can be used, and deviations can be used.
- cellosolves such as ethylene glycolone monomethinoleatenoate, ethylene glycolone mononoteinoreatenoate, and ethylene glycolone monobutynoateatenore; polypropylene glycolone monomethyl ether, polypropylene glycol monoethyl ether, propylene glycol Carbinates such as diethylene glycolone monoethynoleatenole and diethylene glycolonelenobutyl ether; triglycolone ethereone such as triethylene glycol monomethyl ether and tripropylene glycol monomethylenoleate Dicyandiamide; urea and the like.
- a binder resin such as an acrylic acid type or a urethane type commonly used for surface treatment of fibers, nonwoven fabrics, sheets and the like
- a functional dispersion containing a titania-based photocatalyst the solid content of the titanium-based photocatalyst in the functional dispersion containing the binder resin and the titanium-based photocatalyst is preferably 5 to 50%, more preferably 7 to 45%. 10-40% is preferred.
- the mixing ratio between the solid content of the titanium-based photocatalyst and the like and the binder resin is preferably such that the resin solid content is 10 to 300 parts by mass per 100 parts by mass of the solid content of the titanium-based photocatalyst and the like. More preferably, 15 to 250 parts by mass is used, and particularly preferably, 20 to 200 parts by mass is used. ⁇ If the resin solid content is less than 10 parts by mass, the sticking force when attaching the functional dispersion to fibers, nonwoven fabrics, sheets, etc. may not be sufficient, and the titer-based photocatalyst may fall off. Photocatalytic performance may be reduced. If the resin solids content exceeds 300 parts by mass, the titanium-based photocatalyst may be covered with resin when processed into fibers, nonwoven fabrics, sheets, etc. Therefore, the photocatalytic performance may not be sufficiently exhibited.
- the resin melting temperature when kneading the titer-based photocatalyst to the resin is not particularly limited as long as the resin is not deteriorated and the molding temperature.
- the molding temperature is preferably from 100 to 400 ° C, more preferably from 120 to 300 ° C, and still more preferably from 150 to 280 ° C.
- the method for kneading the resin and the titania-based photocatalyst is not particularly limited.
- a titania-based photocatalyst can be mixed with a resin at a high concentration (made into a masterbatch) and then further diluted with a resin to form a sheet, a fiber, a filter, and a molded article.
- a masterbatch By using such a masterbatch, the dispersibility of the titanium-based photocatalyst is further improved, and the performance of the functional resin can be improved.
- the functional resin containing a titer-based photocatalyst decomposes gases such as aldehyde gases such as formaldehyde and acetoaldehyde in the atmosphere, and gases of organic solvents such as toluene, and decomposes organic compounds in the solution. can do.
- the functional resin may be kneaded with an adsorptive substance such as activated carbon or silica gel, or may be used in combination with another photocatalyst. By doing so, it is possible to more easily exhibit the decomposition performance.
- Examples of the compounding agent to be kneaded with the functional resin containing a titer-based photocatalyst include a substance that physically adsorbs a substance to be decomposed and a substance that chemically absorbs a substance to be decomposed.
- Examples of the substance that physically adsorbs the substance to be decomposed include ultrafine particles such as a porous substance such as activated carbon and zeolite such as aerosil.
- a specific surface area of 5 m 2 Zg or more is preferable because the specific surface area of the substance that physically adsorbs the compound is small and the amount of adsorbed compound is small.
- Examples of the substance that chemically absorbs include an ion exchanger, a substance that chemically reacts with the compound to be adsorbed, and a substance that carries a substance that chemically reacts with the compound to be adsorbed.
- Examples of the substance that chemically reacts with the compound to be adsorbed include an aminy conjugate that causes a Schiff reaction with aldehydes such as formaldehyde and acetoaldehyde.
- Examples of the substance supporting the substance that undergoes the chemical reaction include porous silica and a clay mineral having cation exchange properties.
- a compounding agent to be mixed with the functional resin containing a titania-based photocatalyst one compounding agent is used. It may be used or a plurality of compounding agents may be used. Each mixing ratio can be appropriately changed depending on the environment in which the composition is used without any particular limitation.
- Various functional additives are added not only for the antifouling property, deodorant property and antibacterial property, which are the functions of the functional resin containing titania-based photocatalyst, but also for improving the function and making it a composite function. It is also possible.
- Specific compounds include antifouling agents, antibacterial agents, ultraviolet absorbers, antistatic agents, dispersants, pigments, dyes, antioxidants, light stabilizers, flame retardants, foaming agents, and impact modifiers. , Glass fibers, metal stones, moisture proofing agents, bulking agents, coupling agents, flow improvers, wood flour, water proofing agents, leveling agents and the like.
- the amount of the titanium-based photocatalyst kneaded with the resin may be within a range where the photocatalytic performance is exhibited and the resin properties such as viscosity are not significantly impaired by the combination.
- the kneading amount of the preferred titer-based photocatalyst is preferably 0.05 to 60% with respect to the resin, more preferably 0.1 to 20%, and particularly preferably 0.3 to 10%. .
- the amount of the titania-based photocatalyst kneaded is too large, the viscosity of the resin increases and the workability is reduced, and a clean surface may not be obtained. If the amount is too small, sufficient photocatalytic performance may not be exhibited.
- the resin component of the functional resin containing a titer-based photocatalyst is not particularly limited, and any resin such as natural resin, semi-synthetic resin and synthetic resin may be used.
- Thermoplastic resin, thermosetting resin ⁇ It is okay for the fat to be misaligned.
- the specific resin may be any of resin for molding, resin for fiber, and rubber-like resin.
- resin for molding polyethylene, polypropylene, vinyl chloride, ABS resin, AS resin, and nylon resin. Fats, polyester resins, poly-Shi-Dani vinylidene resins, polystyrene, polyacetal, polycarbonate, PBT, phenol resins, alkyd resins, aminoalkyd resins, acrylic resins, silicone resins, fluorine resins, epoxy resins , Urethane resin, saturated polyester resin, melamine resin, urea resin, tetrafluoroethylene resin, unsaturated polyester resin, rayon, acetate, polyvinyl alcohol, cupra, triacetate, natural rubber, silicone rubber , Styrene butadiene rubber, ethylene propylene rubber, fluoro rubber, nitrinole rubber Chlorsulfonated polyethylene rubber, butadiene rubber, synthetic natural rubber, butyl rubber, urethane rubber, acrylic rubber and the like.
- Base materials include building exterior walls, roof exterior surfaces, rooftop surfaces, window glass exterior surfaces, window glass interior surfaces, room walls, floor surfaces, ceiling surfaces, blinds, curtains, road protection walls, tunnel interior walls, and lighting. Exterior surfaces, reflecting surfaces of lighting lamps, interior and exterior surfaces of vehicles such as passenger cars, buses and trains, mirror surfaces, glass exterior surfaces, and glass interior surfaces.
- Examples of the method of supporting the titer-based photocatalyst include a method of spraying a photocatalyst after applying a paint or a binder or a method of mixing and spraying a photocatalyst into a paint or a binder, but are not limited to these methods. .
- the titer-based photocatalyst of the present invention hardly causes coloring or deterioration of the resin and has a controlled particle size, it can be kneaded into a synthetic resin and further used for fibers and films. It can be processed and used.
- a binder having good photocatalytic activity is preferable, such as siloxane resin, silicon resin, fluorine resin, and silicate glass.
- a binder having a light-transmitting property is more preferable.
- those having water repellency, such as siloxane resin and fluorine resin are preferable.
- the photocatalyst When a titanium-based photocatalyst is applied to the surface of a substrate to form a film, the photocatalyst may be applied to the entire surface of the substrate or to a part thereof. Further, the coating solution containing the titer-based photocatalyst may be applied directly to the substrate or may be applied via a primer layer. In particular, when the base material is metallic or vitreous, the use of a primer layer is preferred for improving the adhesive strength.
- a titanium-based photocatalyst may be added to the glaze and used on a ceramic surface or enamel. Mix or mix a titanium-based photocatalyst with silica gel, alumina, etc. You can also. Also, depending on the resin, it is preferable to add a lubricant such as zinc stearate from the viewpoint of further suppressing coloring.
- titania-based photocatalyst can be applied include a reflector, a cover or an umbrella portion of a lighting device; a filter as a range hood, a hood or a fan portion; a table, a cupboard, a wall, a tile or a ceiling as a kitchen accessory.
- Walls, toilet seats, or toilets for toilets Bathtubs, walls, tiles, or ceilings for bathrooms; Clogs, closets, stances, underfloor storages, rice boxes, cooler boxes, or trash boxes; Exterior materials, bricks, partitions, brans, sashes or floors; beddings, futons, pillows or blankets; curtains; carpets; household appliances such as TVs, videos, stereos, coolers, stoves, vacuum cleaners, washing machines, refrigerators, electric pots, Kotatsu, rice cooker, shaver, waste shaver or dryer; as cookware Bees, tea bottles or frying pans; cups, bowls or bowls as tableware; window glasses or handles as automobiles; bicycles; hats, nogs, watches, fishing rods or shoes as portable items; uniforms, suits, socks, underwear as clothing; Coats, jiambas, sweaters, trainers, shirts, pants, kimonos, skirts, stockings or tights; wastewater treatment facilities, septic tanks, s
- the parts include, for example, teeth of a shaver and a waste shaver.
- a titania-based photocatalyst As a substance to which a titania-based photocatalyst can be applied, bacteria, power rubbing, and the like can be sterilized by using a ceiling, a wall, a floor, or the like that is exposed to light.
- the titer-based photocatalyst of the present invention also has an activity in visible light, it can exhibit a decomposing effect and a bactericidal effect with ordinary lighting fixtures that require irradiation with ultraviolet light such as black light. For this reason, it can be used in hospitals, food factories, pharmaceutical factories, cosmetic factories, etc., or can be incorporated into air conditioning facilities.
- the functional dispersion containing a photocatalyst containing a titania-based photocatalyst can be used for various products required to impart gas decomposability such as deodorization, antibacterial properties and antifouling properties. Examples of this use include those described above.
- a functional dispersion containing a titania-based photocatalyst which is processed by impregnating a filter or the like, is used for an air purifier, an air conditioner, a humidifier, etc. to purify air, take measures against a sick house, and store water. It can be applied to tanks etc. Furthermore, by using it as a paint or a sheet in a drainage ditch or a filtration section, it is possible to keep slime from sticking and keep it clean.
- the sheet 'film when the sheet 'film is coated with the functional dispersion, it can be used for various purposes such as wrapping, garbage bags, vinyl houses, wings, and seals applied to the surfaces of glass and mirrors.
- Examples of uses of the functional resin containing a titer-based photocatalyst include those described above.
- Titanium sulfate was dissolved in pure water to prepare an aqueous solution having a titanium concentration of 0.5 molZ liter (aqueous titanium solution).
- Niobium pentoxide and niobium oxalate were dissolved in pure water to prepare an aqueous solution having a niobium concentration of 0.5 molZ liter (aqueous niobium solution).
- Aluminum nitrate was dissolved in pure water to prepare an aqueous solution having an aluminum concentration of 0.5 molZ liter (aqueous aluminum solution).
- Cerium nitrate was dissolved in pure water to prepare an aqueous solution having a cerium concentration of 0.5 mol Z liter (cerium aqueous solution).
- HMT aqueous solution Hexamethylenetetramine was dissolved in pure water to prepare an ImolZ liter aqueous solution (hereinafter, HMT aqueous solution).
- the temperature was raised to 90 ° C, and the mixture was stirred for 24 hours. Then, cool to room temperature, filter, wash with pure water,
- Sample K was synthesized. The powder X-ray analysis pattern of the sample was measured.
- Sample L was synthesized in the same manner as in Example 11, except that the niobium solution was changed to 5 ml. The powder X-ray analysis pattern of the sample was measured.
- Sample K prepared in Example 11 was heated at 300 ° C. for 4 hours to synthesize Sample N.
- the powder X-ray analysis pattern of the sample was measured.
- Sample M prepared in Example 13 was heated at 600 ° C. for 2 hours to synthesize Sample O.
- the powder X-ray analysis pattern of the sample was measured.
- anatase titania As a comparative example of high-purity anatase titania, a commercially available titer (Ishihara Sangyo Co., Ltd., Daledo ST-01) was used.
- the above ST-01 was kept at 600 ° C. for 24 hours in an ammonia stream to obtain a nitrogen-substituted titer.
- a muskmelon-type titer (manufactured by Taihei Chemical Industry Co., Ltd.) was used as the silica-coated titer.
- Example 16 A muskmelon-type titer (manufactured by Taihei Chemical Industry Co., Ltd.) was used as the silica-coated titer.
- niobium content (mol%) in Samples A to E was determined by measuring each atom by ICP analysis. Table 1 shows the results.
- Table 2 shows the results of identifying the crystal phase of the data obtained by measuring the powder X-ray diffraction of Samples FJ and Comparative Samples AC. Table 2 also shows the niobium content (Nb content wt%) by X-ray fluorescence, the average particle size (; zm) by laser diffraction particle size distribution measurement, and the crystallite size (nm) by scanning electron microscope observation.
- the measurement method of the IR ⁇ vector was measured using an infrared absorption device (Nicolet Impact400D) equipped with an ATR accessory called “DuraScope TM” (SensIR Technology).
- Fig. 9 shows the IR spectrum of sample F
- Fig. 10 shows the IR spectrum of comparative sample B.
- the sample K-10 has a light absorbing property in the visible light region, and is highly likely to be a visible light responsive material.
- Comparative Sample A was found to have low light absorption in the visible light region
- Comparative Sample B was found to have light absorption in the visible light region in the nitrogen-substituted type.
- the powder X-ray diffraction pattern force and crystal phase of Sample K-O and Comparative Samples A and B were identified, and the lattice constant of the peak force crystal whose diffraction peak was separated by the Rietveld method was determined.
- the niobium content was determined by measuring each element by ICP analysis.
- the crystal lattice constant (A) of anatase type crystal and rutile type crystal Table 3 shows the results of the content of the zeolite crystal (%) and the content of niobium relative to titanium (mol%).
- Figure 13 shows the near-infrared absorption spectra of sample M and heat-treated samples N and O.
- FIG. 14 shows the results of Comparative Sample A.
- the heat-treated sample N also has absorption peaks in the near-infrared absorption bands I, II, and III
- the heat-treated sample O also has absorption peaks in the near-infrared absorption bands I and III.
- the titer-based photocatalyst of the present invention is 5400-4400 cm. It has an absorption peak in the near infrared.
- the test under fluorescent light is performed with a fluorescent light (NEC Corporation: FL40SSEX-D / 37-HG, 37 watts, with UV cut film attached), illuminance 1000 lux (Tokyo Glass Instruments Co., Ltd .: measured with FLX-1330) ).
- the dark place test was performed in a dark place surrounded by a light shielding plate.
- the methylene blue solution was prepared by dissolving a reagent (special grade of methylene blue reagent manufactured by Kishidai Dangaku Co., Ltd.) in pure water to prepare a 10 ppm concentration solution.
- a reagent special grade of methylene blue reagent manufactured by Kishidai Dangaku Co., Ltd.
- the methylene blue decomposition test was performed by placing 0.1 g of each of Samples A-E, K-O and Comparative Sample A-C in a glass Petri dish with a diameter of 4 cm, adding 5 ml of methylene blue solution, and adding the solution under the above three conditions. (21 ⁇ 1 ° C).
- the methylene blue decomposition activity was evaluated as the time until the blue color of methylene blue became visually colorless as the decomposition time. The results are shown in Table 4.
- Pear Add a photocatalyst, and the color of the resin is the same.
- Impossible Cannot be pulled as a thread
- Knitting Can be woven as a cloth (possible) Weave! / ⁇ (not possible)
- Disperse sample F using dispersant Disperbyk-180 (manufactured by BYK Japan KK, an alkylammonium salt of a block copolymer containing a phosphoric acid group. Acid value 94 mgKOH / g, amine value 94 mgKOHZg average molecular weight 1000) did.
- the dispersion formulation was as follows: 2.3 parts by mass of dispersant per 100 parts by mass of water (4.6 parts by mass per 100 parts by mass of deodorant solids), 50 parts by mass of sample F, preservative 0.3 parts by mass of Vestside # 300 (manufactured by Dainippon Ink and Chemicals, Inc.), 0.2 parts by mass of antifoaming agent Disperbyk-022 (manufactured by Big Chemie Japan KK), and a thickener Metroose SH15000 (Shin-Etsu) 13 parts by mass of a 4% aqueous solution of Idani Kagaku Kogyo Co., Ltd.) was added, and the mixture was stirred with a sand mill at 3000 rpm for 20 minutes to obtain a paste-type dispersion F containing a titer-based photocatalyst.
- the solid content of the titania-based photocatalyst in this dispersion was 30% by mass. Perform the same operation on Sample G-J and Comparative Samples A-C! To obtain a paste-like dispersion G-J containing the titania-based photocatalyst and Comparative Samples. Liquid A-C was obtained.
- 100% cotton fabric (fabric weight lOOgZm 2 ) was dipped, picked up at a squeezing ratio of 70%, and dried at 150 ° C to obtain test cloths FJ and AC.
- the cotton fabric was cut into 20 cm X 20 cm from arbitrary three places, placed in a Tedlar bag, injected with 3 L of air containing 14 ppm of acetoaldehyde gas, and allowed to stand under ultraviolet irradiation for 24 hours.
- the residual gas concentration in the Tedlar bag was measured using a gas detector tube (No. 92L manufactured by Gastech).
- UV irradiation was performed at an intensity of lmWZcm 2 .
- Table 8 shows the results.
- "ND" indicates that acetoaldehyde was not detected.
- Example 24 the discoloration of each test cloth after the deodorization test was examined visually. Table 9 shows the results. [0093] [Table 9]
- Table 10 shows the results. “ND” indicates that acetoaldehyde could not be detected.
- Dispersions FJ have a photocatalyst and are more excellent in resistance to discoloration by ultraviolet irradiation than Comparative Dispersions AC.
- Sample F Add 5 parts by weight of Sample F to 100 parts by weight of a commercial paint (Nippi Fresh, Egg White manufactured by Kanye Co., Ltd.), stir with a sand mill at 3000 rpm for 20 minutes, and test for the content of titer-based photocatalyst Paint F was obtained.
- Samples JJ and comparative powders A to C were treated in the same manner to obtain test paints JJ and titer-based photocatalyst containing test paints GG and comparative test paints AC.
- Example 28 Example 28
- Test paint F containing a titer-based photocatalyst was applied to an aluminum steel plate (5 cm ⁇ 15 cm) with a bar coater (# 20), and then air-dried for 1 mm to obtain a test coated plate F. The same operation was performed for the test paints G-J and the comparative test paints A-C! To obtain test-coated plates G-J and comparative test-coated plates AC. In addition, a plate coated with a paint containing no titer-based photocatalyst was prepared in the same manner as a blank.
- Example 12 After the antifouling test conducted in Example 28, the test coated plate and the comparative test coated plate were visually inspected for discoloration. Table 12 shows the results. When the paint on the test-coated plate and the comparative test-coated plate was colored yellow, it was indicated as “yellowing”, and when it was colored yellow-brown, as "yellow-brown".
- test paints A to E have a photocatalyst and are more excellent in resistance to discoloration by ultraviolet irradiation than the comparative test paints AC.
- sample F One part of the sample F was kneaded with 100 parts of the acrylic resin, and a lgZm 2 sheet was molded to obtain a sample sheet F. The same operation was performed for Sample GJ and Comparative Powder AC to prepare Sample Sheet GJ and Comparative Sample Sheet AC. In addition, a resin sheet was molded in the same manner as described above without the addition of powder to obtain a blank.
- the initial coloring property and the discoloration property of the sample sheets F-J and the comparative sample sheets A-C after 96 hours of ultraviolet irradiation were visually examined.
- the ultraviolet irradiation was performed using an ultraviolet lamp (Toshiba Lighting & Technology Corp .: FL20SBLB-A, 20 watts) and adjusting the UV intensity to lmWZcm 2 (measured by Minolta Co., Ltd .: UV radiometer, UM-10). It was carried out in. bra Table 13 shows the test results for
- Example 30 Each sample sheet prepared in Example 30 was cut into a size of 10 cm ⁇ 10 cm, placed in a Tedlar bag, and 3 liters having an acetoaldehyde gas concentration of 14 ppm were injected.
- the Tedlar bag was irradiated with ultraviolet light for 24 hours under the same conditions as in Example 31, and the residual acetoaldehyde gas concentration after 24 hours was measured using a gas detector tube (No. 92L manufactured by Gastech Co., Ltd.). The test results are shown in Table 14.
- Example 30 Each sample sheet prepared in Example 30 was cut into 30 cm ⁇ 30 cm, placed in a Tedlar bag, and 1 liter of a formaldehyde gas having a concentration of 5 ppm was injected. This tedra One bag was illuminated with 3,000 lux visible light for 24 hours using a fluorescent lamp equipped with an ultraviolet cut film. After the irradiation, the residual acetoaldehyde gas concentration was measured using a gas detector tube (No. 91L and 91LL, manufactured by Gastech Co., Ltd.). The test results are shown in Table 15.
- Antifouling test (methylene blue decomposition test): visible light irradiation
- Example 30 In order to evaluate the antifouling performance of each sample sheet prepared in Example 30, a methylene bleed decomposition test was performed. As a test method, a liquid phase finolem adhesion method for 2003 (http://www.photocatalysis.com/index.html) determined by the Photocatalyst Product Technology Council was used. However, fluorescent light (Toshiba Lifetec Z illuminance 2000LUX) was used as the light source. Table 16 shows the results.
- sample sheet F-J was used as a photocatalyst sheet.
- the coloring was excellent and no discoloration due to irradiation or ultraviolet irradiation was observed.
- Sample F was added to a polyester resin for fibers at a concentration of 3% by mass, melted and stringed. Thereafter, the yarn was raised from a draw ratio of 2 times until the yarn was broken. Further, the degree of coloring of the drawn yarn was measured. Sample G, comparative powder A, and comparative powder C were similarly processed. For Comparative Powder C, the thread was broken and melted, and a stringing test could not be performed.
- Example 35 10 g of the fiber produced in Example 35 was rubbed off, and an acetoaldehyde gas decomposition test was carried out in the same manner as in Example 32. The test results are shown in Table 18.
- Example 35 10 g of the fiber produced in Example 35 was squeezed out, put into a Tedlar nog, and 3 L of air containing 5 ppm of hydrogen sulfide gas was put therein, and a gas decomposition test was carried out in the same manner as in Example 33. Use a gas detector tube (Gastech Co., Ltd. No. 4LL) to measure the concentration of residual sulfur gas. And measured. The test results are shown in Table 19.
- the titania-based photocatalyst of the present invention is a photocatalyst that exhibits excellent photocatalytic performance under visible light, for example, under a commercially available fluorescent lamp.
- the titer-based photocatalyst of the present invention can be used as it is as a powder. By adding or kneading it to a paint or resin, fiber or the like, and processing it, a paint or resin having photocatalytic performance in response to visible light, Fibers and the like can be obtained.
- the functional dispersion containing the titer-based photocatalyst of the present invention can be used as a functional processed product in fibers, nonwoven fabrics, filters, films, paints, papers, molded articles and the like.
- the functional resin containing the titer-based photocatalyst of the present invention can be processed into a molded product, a sheet, a thread, and the like, and can be used as a plate, a film, a filter, a fiber, and the like.
- the titer-based photocatalyst of the present invention differs from general photocatalysts in that the amount of ultraviolet irradiation is extremely small, and it can be used in homes, etc., for antifouling, antibacterial, and toxic gases such as aldehyde gas.
- the attached substance can be decomposed and used for environmental purification.
- FIG. 1 shows the result of measuring the powder X-ray diffraction pattern of titer-based photocatalyst sample A.
- FIG. 2 The result of measuring the powder X-ray diffraction pattern of the titanium-based photocatalyst sample B.
- FIG. 3 The result of measuring the powder X-ray diffraction pattern of titer-based photocatalyst sample C.
- FIG. 4 The result of measuring the powder X-ray diffraction pattern of titer-based photocatalyst sample D.
- FIG. 5 The result of measuring the powder X-ray diffraction pattern of the titer-based photocatalyst sample E.
- FIG. 6 shows a result of measuring a powder X-ray diffraction pattern of Comparative Sample A.
- FIG. 7 shows a result of measuring a powder X-ray diffraction pattern of Comparative Sample B.
- FIG. 8 shows a result of measuring a powder X-ray diffraction pattern of Comparative Sample C.
- FIG. 13 Near-infrared absorption spectra of titer-based photocatalyst sample M, titer-based photocatalyst sample N, and titer-based photocatalyst sample O.
- FIG. 14 Near-infrared absorption spectrum of comparative sample A.
- the vertical axis in FIG. 18 is the value of Int. Zcps.
- the horizontal axis in Fig. 18 is the value of 20 Zdeg.
- the horizontal axis in FIGS. 9 and 10 indicates the wave number (cm 1 ) of infrared rays.
- FIGS. 9 and 10 The vertical axis in FIGS. 9 and 10 indicates the absorbance.
- the solid line in FIG. 9 shows the IR vector of the pyridine adsorption treatment (Pyr +) of the titer-based photocatalyst sample F (Pyr +).
- the solid line in FIG. 10 shows the IR ⁇ vector of the sample (Pyr +) obtained by performing the pyridine adsorption treatment on the comparative sample B.
- the dashed line in FIG. 9 shows the IR spectrum of the titer-based photocatalyst sample F.
- the dashed line in FIG. 10 shows the IR spectrum of Comparative Sample B.
- the vertical axis in FIGS. 11 and 12 is an arbitrary scale.
- the horizontal axis in FIGS. 11 and 12 is the wavelength nm.
- K in FIG. 11 indicates a titer-based photocatalyst sample K.
- L in FIG. 11 indicates a titer-based photocatalyst sample L.
- M in FIG. 11 and FIG. 13 indicates a titer-based photocatalyst sample M.
- N in FIG. 11 and FIG. 13 indicates a titer-based photocatalyst sample N.
- O in FIGS. 11 and 13 indicates a titanium-based photocatalyst sample O.
- a in FIGS. 12 and 14 shows Comparative Sample A.
- FIG. 12 shows the comparative sample B.
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JP2007174936A (ja) * | 2005-12-27 | 2007-07-12 | Toagosei Co Ltd | クーラーボックス |
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JP2013220403A (ja) * | 2012-04-19 | 2013-10-28 | National Institute For Materials Science | 可視光応答性光触媒とその製造方法 |
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CN105196836A (zh) * | 2014-06-28 | 2015-12-30 | 冷庆林 | 一种利用汽车尾气为车内供暖的方法 |
JP2019173207A (ja) * | 2018-03-28 | 2019-10-10 | 俊夫 小室 | フォトン及びイオンを発生する健康増進組成物 |
JP2022076646A (ja) * | 2020-11-10 | 2022-05-20 | Dic株式会社 | 金属化合物を担持した酸化チタンの水性組成物 |
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JP2007174936A (ja) * | 2005-12-27 | 2007-07-12 | Toagosei Co Ltd | クーラーボックス |
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JPWO2014132607A1 (ja) * | 2013-02-27 | 2017-02-02 | パナソニックIpマネジメント株式会社 | 酸化チタン粒子分散液、コーティング剤組成物及び抗菌・抗ウイルス性部材 |
WO2014132607A1 (ja) * | 2013-02-27 | 2014-09-04 | パナソニック株式会社 | 酸化チタン粒子分散液、コーティング剤組成物及び抗菌・抗ウイルス性部材 |
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JP2019173207A (ja) * | 2018-03-28 | 2019-10-10 | 俊夫 小室 | フォトン及びイオンを発生する健康増進組成物 |
JP2022076646A (ja) * | 2020-11-10 | 2022-05-20 | Dic株式会社 | 金属化合物を担持した酸化チタンの水性組成物 |
JP7238877B2 (ja) | 2020-11-10 | 2023-03-14 | Dic株式会社 | 金属化合物を担持した酸化チタンの水性組成物 |
JPWO2022138187A1 (ja) * | 2020-12-22 | 2022-06-30 | ||
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JP7235162B2 (ja) | 2020-12-22 | 2023-03-08 | Dic株式会社 | 酸化チタン組成物 |
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