WO2016137192A1 - 가시광 활성 광촉매 코팅 조성물 및 공기정화용 필터 - Google Patents
가시광 활성 광촉매 코팅 조성물 및 공기정화용 필터 Download PDFInfo
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- WO2016137192A1 WO2016137192A1 PCT/KR2016/001741 KR2016001741W WO2016137192A1 WO 2016137192 A1 WO2016137192 A1 WO 2016137192A1 KR 2016001741 W KR2016001741 W KR 2016001741W WO 2016137192 A1 WO2016137192 A1 WO 2016137192A1
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- visible light
- light active
- active photocatalyst
- coating composition
- photocatalyst coating
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- 239000000203 mixture Substances 0.000 title abstract description 7
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- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
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- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
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- B01J37/344—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of electromagnetic wave energy
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- B01D2259/804—UV light
Definitions
- a visible light active photocatalyst coating composition and an air purification filter are provided.
- air purification filters are used to remove dust, bacteria, and other contaminants in indoor air.
- Such a filter for air purification can be removed by adsorbing contaminants due to its porous structure, but the adsorbed contaminants accumulate over time, resulting in deterioration of the air purification function. .
- the photocatalyst was used to activate the water and oxygen contained in the air to decompose and remove the adsorbed contaminants, thereby extending the life of the filter.
- a binder material in order to coat the photocatalyst on the filter, a binder material should be used, and thus, there is a problem of blocking the pores of the filter or attaching to the surface of the photocatalyst to lower the surface activity of the photocatalyst with respect to light.
- a visible light active photocatalyst coating composition which realizes visible light active performance and excellent photocatalytic efficiency, and is quick and easy to coat.
- an air purifying filter which realizes long-term excellent air cleaning, deodorizing and antibacterial performance.
- a visible light active photocatalyst coating composition comprising a visible light active photocatalyst, and an aqueous solvent.
- the visible light active photocatalyst may have activity with respect to visible light in a wavelength range of about 380 nm to about 500 nm.
- the visible light active photocatalyst is a porous first metal oxide; And second metal particles, second metal oxide particles, or both of which are supported on the porous first metal oxide.
- the first metal oxide may include at least one selected from titanium oxide, tungsten oxide, zinc oxide, niobium oxide, and a combination thereof.
- the second metal particles and the second metal of the second metal oxide particles may include transition metals, precious metals, or both.
- the second metal is tungsten, chromium, vanadium, molybdenum, copper, iron, cobalt, manganese, nickel, platinum, gold, cerium, cadmium, zinc, magnesium, calcium, strontium, barium, radium, palladium and their It may include at least one selected from the combination.
- the weight ratio of the sum of the porous first metal oxide and the second metal particle and the second metal oxide particle included in the visible light active photocatalyst may be about 1: 0.001 to about 1: 0.1.
- the visible light active photocatalyst coating composition may be applied to an active carbon-containing porous substrate to form a photocatalyst coating layer for an air purification filter.
- the activated carbon-containing porous substrate is a woven or nonwoven fabric made of organic or inorganic fiber material; paper; Foams; And activated carbon may be attached or impregnated to a porous substrate formed of a material including at least one selected from the group consisting of a combination thereof.
- the visible light active photocatalyst may be included in about 4% by weight to about 10% by weight.
- the aqueous solvent may include about 90% by weight to about 96% by weight.
- the aqueous solvent may be water.
- the visible light active photocatalyst may be formed of particles.
- the average diameter of the visible light active photocatalyst particles may be from about 30 nm to about 500 nm.
- a filter for air purification comprising a photocatalyst coating layer formed of the visible light active photocatalyst coating composition.
- the air purification filter may not include alcohol and a binder material.
- the air purification filter may further include an activated carbon-containing porous substrate, and the photocatalyst coating layer may be coated on the activated carbon-containing porous substrate.
- the activated carbon-containing porous substrate may include about 20% to about 80% by weight of activated carbon.
- the activated carbon-containing porous substrate may have a thickness of about 0.5 mm to about 3.0 mm.
- the visible light active photocatalyst coating composition realizes visible light active performance and excellent photocatalytic efficiency, and coating is quick and easy.
- a visible light active photocatalyst coating composition comprising a visible light active photocatalyst, and an aqueous solvent.
- the photocatalyst refers to a substance capable of purifying air, deodorizing, and antibacterial activity by generating superoxide anions or hydroxy radicals from electrons and holes generated from energy obtained by absorbing light.
- UV-activated photocatalysts are commonly used as such photocatalysts.
- UV-activated photocatalysts made of titanium oxide are used.
- indoor light sources have a very low efficiency of photocatalysts. I need it.
- the binder material may block the pores of the filter or adhere to the surface of the photocatalyst to reduce the surface activity of light of the photocatalyst.
- solutes such as the photocatalyst may precipitate more quickly, thereby lowering dispersibility, and the platinum may be included in the photocatalyst in the alcohol solvent. And other components may cause an alcohol decomposition reaction, resulting in low storage stability.
- the visible light active performance that can be activated by the visible light as well as ultraviolet light, including the visible light active photocatalyst material can be improved to a high level photocatalytic efficiency without a separate light source supply in the room have.
- it can effectively prevent the pore clogging of the filter and the surface activity of the photocatalyst including the aqueous solvent to extend the life of the product, and further reduce the precipitation rate of the photocatalyst to improve the dispersibility. Since the reaction between the solvent can be prevented there is an advantage that can be implemented for a long time uniform performance, excellent storage stability and excellent economy.
- the visible light active photocatalyst may be active against visible light in the wavelength range of about 380 nm to about 500 nm, and may also exhibit an absorbance of about 20% for visible light at about 400 nm, for example. It may be prepared to exhibit an absorbance of about 10% to visible light.
- the visible light active photocatalyst may sufficiently generate electrons and holes even by an indoor light source without a separate light source supply device for irradiating ultraviolet rays, thereby realizing excellent photocatalytic efficiency. have.
- the visible light active photocatalyst is a porous first metal oxide; And second metal particles, second metal oxide particles, or both of which are supported on the porous first metal oxide.
- the porous first metal oxide may be formed as spherical, plate or needle-shaped particles by, for example, a sol-gel method or a hydrothermal method as a carrier.
- the second metal particles or the second metal oxide particles may be supported by the photo-deposition method on the porous first metal oxide, but is not limited thereto.
- the first metal oxide may include, for example, at least one selected from titanium oxide, tungsten oxide, zinc oxide, niobium oxide, and combinations thereof. Specifically, the first metal oxide may include tungsten oxide, thereby further improving the visible light active performance.
- the average diameter of the first metal oxide particles may be, for example, about 30 nm to about 100 nm.
- the second metal particles and the second metal of the second metal oxide may be used, for example, without limitation, metals that impart activity to visible light, and may include transition metals, precious metals, or both.
- the second metal particles and the second metal oxide may include at least one selected from the group consisting of transition metals, precious metals, oxides thereof, and combinations thereof.
- the second metal may be tungsten, chromium, vanadium, molybdenum, copper, iron, cobalt, manganese, nickel, platinum, gold, cerium, cadmium, zinc, magnesium, calcium, strontium, barium, At least one selected from the group consisting of radium, palladium, and combinations thereof, and specifically, at least one selected from the group consisting of platinum, copper, gold, silver, zinc, palladium, and combinations thereof. Can be implemented.
- the first metal oxide may include tungsten oxide
- the second metal may include platinum, thereby absorbing visible light at a higher level, thereby effectively improving the photocatalytic efficiency for visible light.
- the weight ratio of the sum of the porous first metal oxide and the second metal particle and the second metal oxide particle included in the visible light active photocatalyst may be about 1: 0.001 to about 1: 0.1. have.
- the first metal oxide sufficiently generates electrons and holes by visible light while sufficiently recombining the electrons and holes generated by the second metal particles or the second metal oxide particles. It is possible to effectively improve the photocatalytic activity efficiency.
- the sum total of the second metal particles and the second metal oxide particles means one sum, that is, the sum of the second metal particles or the sum of the second metal oxide particles, when both include only one of the two, and both In the case of including, it means the total sum of the second metal particles and the second metal oxide particles.
- the total sum of the second metal particles and the second metal oxide particles included in the visible light active photocatalyst may be about 0.1 wt% to about 10 wt%.
- the content of the porous first metal oxide may be about 90% by weight to about 99.9% by weight.
- the content of the porous first metal oxide is greater than about 99.9% by weight, electrons and pores generated by visible light may easily recombine, and the separation thereof may be difficult, resulting in insufficient photocatalytic activity. If the amount is less than% by weight, the number of electrons transitioned from the porous first metal oxide may not be sufficiently secured, and thus the photocatalytic activity may be lowered, and the exposure area of the first metal oxide to light may be decreased to decrease the photocatalytic performance. Can be.
- porous first metal oxides may be combined with each other to form one cluster.
- the visible light active photocatalyst may be formed of particles.
- the average diameter of the visible light active photocatalyst particles may be, for example, about 30 nm to about 500 nm, and specifically about 30 nm to about 200 nm.
- the visible light active photocatalyst coating composition When the visible light active photocatalyst coating composition is coated on the porous substrate by having an average diameter in the above range, the visible light active photocatalyst may be more uniformly dispersed and more quickly penetrates into the porous substrate to implement excellent dispersibility and excellent adhesion. Can be. In addition, by ensuring an exposure area to visible light can exhibit sufficient air cleaning and antibacterial function.
- the specific surface area of the first metal oxide may be about 50 m 2 / g to about 500 m 2 / g.
- the visible light active photocatalyst coating composition may comprise from about 4% to about 10% by weight of the visible light active photocatalyst. By including the content within the above range can be achieved even by the visible light sufficiently good air cleaning, deodorization and antibacterial performance while not excessively increasing the cost.
- the visible light active photocatalyst coating composition may include from about 90% to about 96% by weight of the aqueous solvent.
- the visible light active photocatalyst may be properly dispersed to easily absorb and dry the coating on the porous substrate, for example, the porous filter, while rapidly increasing production efficiency.
- the content of the aqueous solvent is less than about 90%, the visible light active photocatalyst is difficult to disperse and the coating of the visible light active photocatalyst coating composition is also difficult to achieve a uniform performance as a whole, the adhesion may be reduced, about 96% If it exceeds, there is a problem that the content of the visible light active photocatalyst is very insufficient so that air cleaning, deodorization, and antibacterial performance may not be expressed to the required level.
- the aqueous solvent may be water.
- the water may include distilled water, ionized water, or both, but is not limited thereto.
- the visible light active photocatalyst coating composition may not include an alcohol and a binder material. Accordingly, it is possible to implement a good photocatalytic efficiency by sufficiently including the exposed surface area of the visible light active photocatalyst, and to effectively improve the adsorption and removal performance of harmful substances such as volatile organic compounds (VOCs).
- VOCs volatile organic compounds
- Such a binder material means an organic binder or an inorganic binder including a binder resin known in the art, for example, an acrylic resin, a polyester resin, and the like, and specifically, silica sol, alumina sol, zirconia sol, and titania sol. And the like, but are not limited thereto.
- a binder resin known in the art, for example, an acrylic resin, a polyester resin, and the like, and specifically, silica sol, alumina sol, zirconia sol, and titania sol. And the like, but are not limited thereto.
- toluene is a material having a high molecular weight and a nonpolar polarity, and thus, toluene has a problem in that adsorption and removal are difficult.
- the visible light active photocatalyst coating composition does not include alcohol and a binder material, so that the exposed surface area of the visible light active photocatalyst may not be reduced, and in particular, adsorption occurs at a high level even for harmful substances such as toluene. Removal rates can be implemented.
- the visible light active photocatalyst coating composition may be applied to the activated carbon-containing porous substrate to form a photocatalyst coating layer for an air purification filter, thereby purifying air, deodorizing Or antimicrobial effects.
- the activated carbon is a porous carbon material including fine pores and has very high adsorptivity.
- the photocatalyst coating layer for the air purification filter may be formed by immersing the activated carbon-containing porous substrate in the visible light active photocatalyst coating composition and then drying, or spraying the visible light active photocatalyst coating composition on the activated carbon-containing porous substrate by a spray method. May be, but is not limited thereto.
- the visible light active photocatalyst coating composition to the porous substrate containing the activated carbon, it is possible to quickly absorb and dry without containing an alcohol solvent while providing excellent adhesion without including a binder material. There is an advantage.
- the activated carbon-containing porous substrate may include a woven or nonwoven fabric made of organic or inorganic fiber; paper; Foams; And activated carbon may be contained or impregnated on the porous substrate formed of a material comprising at least one selected from the group consisting of a combination thereof.
- the method of attaching or impregnating the activated carbon to the porous substrate may be performed according to a method known in the art, for example, immersing the porous substrate in an activated carbon-containing composition and then drying the porous substrate, or
- the activated carbon-containing composition may be sprayed onto the substrate by a spray method, but is not limited thereto.
- the activated carbon-containing porous substrate may include about 20% to about 80% by weight of activated carbon.
- the visible light active photocatalyst coating composition may be adhered to an excellent level while sufficiently adsorbing harmful substances in the air, and at the same time, the cost may not be excessively increased.
- the activated carbon-containing porous substrate may further contain an adsorbent including at least one selected from the group consisting of diatomaceous earth, zeolite, silica gel, starch, bentonite, alumina, and combinations thereof.
- an adsorbent including at least one selected from the group consisting of diatomaceous earth, zeolite, silica gel, starch, bentonite, alumina, and combinations thereof.
- the activated carbon-containing porous substrate may have a thickness of about 0.5 mm to about 3.0 mm. By having a thickness within the above range, it is possible to exert an air cleaning, deodorizing or antibacterial effect to an excellent level without excessively increasing the thickness of the air purification filter.
- a filter for air purification comprising a photocatalyst coating layer formed of the visible light active photocatalyst coating composition.
- the visible light active photocatalyst coating composition is as described above in one embodiment.
- the air purification filter can implement the visible light active performance, thereby improving the photocatalytic efficiency to a high level without a separate light source supply device indoors.
- the visible light active photocatalyst coating composition may include an aqueous solvent to effectively prevent pore clogging of the filter and a decrease in surface activity of the photocatalyst, thereby extending the life of the product, and further reducing the precipitation rate of the photocatalyst to improve dispersibility. It can be, and can prevent the reaction between the photocatalyst and the solvent has the advantage that can be implemented for a long time uniform performance, excellent storage stability and excellent economy.
- the air purification filter may not include an alcohol and a binder material. Accordingly, since the exposed surface area of the visible light active photocatalyst is not reduced, adsorption occurs at a high level even for harmful substances such as toluene, thereby achieving excellent removal rate and excellent dispersibility and excellent storage stability as described above.
- the air purification filter may further include an activated carbon-containing porous substrate, and the photocatalyst coating layer may be coated on the activated carbon-containing porous substrate.
- the photocatalyst coating layer may be coated on the entire surface of the activated carbon-containing porous substrate, that is, both the outer surface exposed to the outside of the surface of the activated carbon-containing porous substrate and the inner surface forming the pores therein. Can be.
- the activated carbon-containing porous substrate may be dipped in the visible light active photocatalyst coating composition and then dried, or may be coated by spraying the visible light active photocatalyst coating composition on the activated carbon-containing porous substrate by a spray method, but is not limited thereto. .
- the activated carbon-containing porous substrate is as described above in one embodiment.
- the visible light active photocatalyst coating composition to the porous substrate containing the activated carbon, it is possible to quickly absorb and dry without containing an alcohol solvent while providing excellent adhesion without including a binder material.
- the photocatalyst coating layer is not detached from the activated carbon-containing processable substrate by air flow, thereby realizing long-term air cleaning, deodorization, or antibacterial effect.
- the activated carbon-containing porous substrate is attached to or impregnated with a porous substrate formed of a material including at least one selected from the group consisting of organic or inorganic fiber woven or nonwoven fabric, paper, foam, and combinations thereof. And may be contained.
- the method of attaching or impregnating the activated carbon to the porous substrate may be performed according to a method known in the art, and is not particularly limited.
- the activated carbon-containing porous substrate may include about 20% to about 80% by weight of activated carbon.
- the visible light active photocatalyst coating composition may be adhered to an excellent level while sufficiently adsorbing harmful substances in the air, and at the same time, the cost may not be excessively increased.
- the activated carbon-containing porous substrate may further contain an adsorbent including at least one selected from the group consisting of diatomaceous earth, zeolite, silica gel, starch, bentonite, alumina, and combinations thereof.
- an adsorbent including at least one selected from the group consisting of diatomaceous earth, zeolite, silica gel, starch, bentonite, alumina, and combinations thereof.
- the activated carbon-containing porous substrate may have a thickness of about 0.5 mm to about 3.0 mm. By having a thickness within the above range, it is possible to exert an air cleaning, deodorizing or antibacterial effect to an excellent level without excessively increasing the thickness of the air purification filter.
- the air purifying filter may be formed in a shape known in the art, and includes, for example, a honeycomb type, a sheet type, a back type, and a combination thereof. It may be formed in at least one shape selected from the group, but is not limited thereto.
- the honeycomb type may mean that the honeycomb is formed in a honeycomb shape, the sheet type may be formed in a thin plate shape, and the bag type may be formed in an elongated bag shape.
- tungsten oxide (WO 3 ) powder was dispersed in water, 0.2 part by weight of chloroplatinic acid (H 2 PtCl 6 ) was added to the solution based on 100 parts by weight of tungsten oxide (WO 3 ) to prepare a Pt / WO 3 slurry.
- UV (20W) was irradiated with UV for about 30 minutes to dope platinum (Pt) particles into the tungsten oxide (WO 3 ) particles.
- a methanol solution corresponding to 10% by weight is added to the slurry containing the tungsten oxide (WO 3 ) particles doped with the platinum (Pt) particles, and the UV of the UV lamp 20W is stirred while stirring the slurry. Irradiation for about minutes to form a visible light active photocatalyst in which platinum (Pt) particles were supported on tungsten oxide (WO 3 ), and the weight ratio of the tungsten oxide to the platinum particles was 1: 0.002.
- an activated carbon-containing porous substrate was prepared by impregnating activated carbon in a nonwoven fabric having a thickness of 2 mm by a polypropylene fiber material, and the activated carbon-containing porous substrate contained 60 wt% of the activated carbon.
- the activated carbon-containing porous substrate was immersed in the visible light active photocatalyst coating composition and dried to prepare a filter for air purification.
- Visible light was mixed in the same manner as in Example 1 except that 5% by weight of the visible light active photocatalyst, 90% by weight of isopropyl alcohol (IPA) and 5% by weight of TiO 2 sol binder were mixed and stirred without mixing and stirring water.
- An active photocatalyst composition and a filter for air purification were prepared.
- Measuring method After the air purifying filters of Example 1 and Comparative Example 1 were installed in a small chamber of 20L volume (ADTEC), air containing 0.2 ppm of toluene in the chamber was continuously maintained at a flow rate of 167 cc / min. And the ventilation frequency was set to 0.13 times / hr. LED 20W module was used as the light source.
- the toluene removal rate was calculated by the following formula 1 by measuring the concentration of toluene (hereinafter referred to as a first concentration) before entering the chamber and the concentration of toluene (hereinafter referred to as a second concentration) in air after passing through the chamber. The concentration was analyzed by HPLC (Agilent) by concentrating the amount for 10L volume using a DNPH (2,4-dinitrophenylhydrazine) cartridge. The results are as described in Table 1 below.
- Toluene removal rate (%) (first concentration-second concentration) / first concentration X 100
- the filter for air purification according to Example 1 which is prepared using an aqueous solvent without using a binder material, has a very high toluene removal rate of 83%, whereas Comparative Filter 1 uses a binder material. Filter for air purification by the low toluene removal rate of 34% can be clearly expected that the air purification performance is inferior.
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Abstract
Description
톨루엔 제거율[%] | |
실시예 1 | 83 |
비교예 1 | 34 |
Claims (20)
- 가시광 활성 광촉매재, 및 수계 용매를 포함하는 가시광 활성 광촉매 코팅 조성물.
- 제1항에 있어서,상기 가시광 활성 광촉매재가 380nm 내지 500nm 파장범위의 가시광선에 대하여 활성을 갖는가시광 활성 광촉매 코팅 조성물.
- 제1항에 있어서,상기 가시광 활성 광촉매재가 다공성의 제1 금속 산화물; 및 상기 다공성의 제1 금속 산화물에 담지된 제2 금속 입자, 제2 금속 산화물 입자 또는 이들 모두;를 포함하는가시광 활성 광촉매 코팅 조성물.
- 제3항에 있어서,상기 제1 금속 산화물은 산화티탄, 산화텅스텐, 산화아연, 산화니오븀 및 이들의 조합에서 선택된 적어도 하나를 포함하는가시광 활성 광촉매 코팅 조성물.
- 제3항에 있어서,상기 제2 금속 입자 및 상기 제2 금속 산화물 입자의 제2 금속이 전이금속, 귀금속 또는 이들 모두를 포함하는가시광 활성 광촉매 코팅 조성물.
- 제5항에 있어서,상기 제2 금속은 텅스텐, 크롬, 바나듐, 몰리브데넘, 구리, 철, 코발트, 망간, 니켈, 백금, 금, 세륨, 카드늄, 아연, 마그네슘, 칼슘, 스트로니튬, 바륨, 라듐, 팔라듐 및 이들의 조합에서 선택된 적어도 하나를 포함하는가시광 활성 광촉매 코팅 조성물.
- 제3항에 있어서,상기 가시광 활성 광촉매재에 포함된 상기 다공성의 제1 금속 산화물 대 상기 제2 금속 입자 및 상기 제2 금속 산화물 입자를 합한 총합의 중량비가 1:0.001 내지 1:0.1인가시광 활성 광촉매 코팅 조성물.
- 제1항에 있어서,상기 가시광 활성 광촉매 코팅 조성물은 활성탄 함유 다공성 기재에 코팅되어 공기정화 필터용 광촉매 코팅층을 형성하는 용도로 적용되는가시광 활성 광촉매 코팅 조성물.
- 제8항에 있어서,상기 활성탄 함유 다공성 기재는 유기 섬유 또는 무기 섬유 재질의 직포나 부직포; 종이; 발포체; 및 이들의 조합으로 이루어진 군에서 선택된 적어도 하나를 포함하는 재료로 형성된 다공성 기재에 활성탄이 부착되거나, 또는 함침되어 함유된가시광 활성 광촉매 코팅 조성물.
- 제1항에 있어서,상기 가시광 활성 광촉매재를 4 중량% 내지 10 중량%로 포함하는가시광 활성 광촉매 코팅 조성물.
- 제1항에 있어서,상기 수계 용매를 90 중량% 내지 96 중량%로 포함하는가시광 활성 광촉매 코팅 조성물.
- 제1항에 있어서,상기 수계 용매가 물인가시광 활성 광촉매 코팅 조성물.
- 제1항에 있어서,상기 가시광 활성 광촉매재가 입자로 형성된가시광 활성 광촉매 코팅 조성물.
- 제13항에 있어서,상기 가시광 활성 광촉매 입자의 평균 직경이 30㎚ 내지 500㎚인가시광 활성 광촉매 코팅 조성물.
- 제1항에 있어서,알코올 및 바인더 물질을 포함하지 않는가시광 활성 광촉매 코팅 조성물.
- 제1항 내지 제15항 중 어느 한 항에 따른 가시광 활성 광촉매 코팅 조성물로 형성된 광촉매 코팅층을 포함하는 공기정화용 필터.
- 제16항에 있어서,알코올 및 바인더 물질을 포함하지 않는공기정화용 필터.
- 제16항에 있어서,활성탄 함유 다공성 기재를 더 포함하고,상기 활성탄 함유 다공성 기재에 상기 광촉매 코팅층이 코팅된공기정화용 필터.
- 제18항에 있어서,상기 활성탄 함유 다공성 기재가 활성탄을 20 중량% 내지 80 중량%로 포함하는공기정화용 필터.
- 제18항에 있어서,상기 활성탄 함유 다공성 기재의 두께가 0.5mm 내지 3.0mm인공기정화용 필터.
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CN201680012415.8A CN107278220B (zh) | 2015-02-26 | 2016-02-23 | 可见光活性光催化剂涂敷组合物及空气净化用过滤器 |
US15/553,773 US10449519B2 (en) | 2015-02-26 | 2016-02-23 | Visible light-activated photocatalytic coating composition and air purification filter |
EP16755842.8A EP3266838A4 (en) | 2015-02-26 | 2016-02-23 | Composition for coating visible light active photocatalyst and filter for air purification |
US16/570,038 US10898879B2 (en) | 2015-02-26 | 2019-09-13 | Visible light-activated photocatalytic coating composition and air purification filter |
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JP2018507775A (ja) | 2018-03-22 |
KR20160104823A (ko) | 2016-09-06 |
CN107278220A (zh) | 2017-10-20 |
US20200001275A1 (en) | 2020-01-02 |
CN107278220B (zh) | 2020-01-10 |
US10449519B2 (en) | 2019-10-22 |
JP6577591B2 (ja) | 2019-09-18 |
US10898879B2 (en) | 2021-01-26 |
US20180236438A1 (en) | 2018-08-23 |
KR102101220B1 (ko) | 2020-04-17 |
EP3266838A1 (en) | 2018-01-10 |
EP3266838A4 (en) | 2018-01-10 |
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