CN1513040A - Photocatalytic coating material having photocatalytic activity and adsorption property and method for preparating same - Google Patents
Photocatalytic coating material having photocatalytic activity and adsorption property and method for preparating same Download PDFInfo
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Abstract
Disclosed is a photocatalytic coating sol composition and the method for preparing the same. The photocatalityc coating sol composition comprising 0.1% to 20% by weight of a photocatalyst, 0.1% to 10% by weight of an inorganic adsorbent, 1% to 20% by weight of an inorganic binder, 55% to 95% by weight of an organic solvent and if necessary 0.1% by weight to 10% by weight of a metal compound. Specifically, the present invention can remove harmful substances by coating photocatalytic coating sol composition prepared from photocatalyst, inorganic adsorbent, inorganic binder, metal compound and organic solvent on metal filter such as aluminum etc., and plastic filter such as polyethylene and polypropylene etc.used in environmental contaminants treatment system or air conditioning plant such as air-conditioner and air-cleaner, according to any one of and ordinary coating techniques such as spray method or dipping method etc. at room temperature.
Description
Technical Field
The present invention relates to a photocatalytic coating sol composition and a method for preparing the same, and more particularly, to the use of a photocatalytic coating sol composition for coating an environmental purification system by coating a photocatalytic sol coating composition having high adsorption performance and high photocatalytic activity at room temperature on a metal mesh, a non-woven fabric, a ceramic filter, and a plastic filter, such as Polyethylene (PE), of a non-ferrous metal, such as stainless steel, such as aluminum, with an inorganic binder using a conventional coating technique, such as a spray coating method or a dipping method.
Background
Heretofore, conventional methods for treating environmental pollutants can be divided into two categories. One is a physicochemical process including adsorption, condensation, solvent washing and catalytic oxidation processes. The other is a biological treatment method. However, the adsorption method and the condensation method cannot effectively treat the contaminants completely, and thus the application of the two methods is limited. The solvent washing method is a chemical deodorization method which neutralizes contaminants by chemical substances, and thus the removal rate of contaminants is high for a limited area.However, the above method has some disadvantages in that an auxiliary device is required to spray the chemical in order to effectively react the chemical with the contaminants in an area where a large pollution source exists, and a large amount of the chemical must be used to neutralize the contaminants where the amount of the contaminants is large and the concentration is high. In addition, in the direct combustion method and the catalytic oxidation method, substances causing pollution are removed by oxidation, the removal efficiency is high, but NO, for example, is generatedXAnd SOXAnd the like, and the cost required by the method is high.
Since the initial investment and operation cost of the method for biologically treating pollutants using microorganisms are low, the method has been widely used in recent years, and the method has been actively studied in advanced industrial countries such as europe and north america, and has been put into a commercialization stage. In this method, various microorganisms capable of removing contaminants are immobilized on the carrier, which is advantageous for efficient removal of contaminants. In addition, the method can also adopt small-scale equipment. However, this method has technical problems, for example, that contaminants as nutrients for the growth of microorganisms must continuously enter a reactor where contaminant removal is actually performed, carriers must be periodically cleaned, microorganisms must be well controlled, and the method must be continuously operated.
Recently, in order to solve the above problems, there is an increasing interest in advanced oxidation technology for removing pollutants and odorous substances using a photocatalyst. For example, Korean patent application No.1999-0052838 discloses a filter using a photocatalyst; wherein the filter is coated with titanium dioxide (TiO) such as non-woven fabric, activated carbon and zeolite2) And photocatalysts such as zinc oxide (ZnO) and silver (Ag). Korean patent application No.2000-0034908 discloses a method of treating volatile organic compounds using a photocatalyst. Korean utility model application No.2000-0029990 discloses an apparatus for treating water using titanium oxide.
The photocatalytic oxidation reaction means that when light energy having energy larger than the energy band gap is irradiated on the photocatalyst, holes and electrons are generated, and hydroxyl radicals (hydroxyl radicals) generated in the holes are generated-OH), the gas phase or liquid phase organic matters adsorbed on the surface of the photocatalyst are subjected to decomposition reaction.
That is, the photocatalyst exhibits catalytic activity by absorbing light energy, and the generated oxidizing power oxidatively decomposes environmental pollutants. Representative of substances capable of initiating a photocatalytic reaction may be, for example, TiO2、ZnO2、ZnO、SrTiO3、CdS、GaP、InP、GaAs、BaTiO3、KNbO3、Fe2O3、Ta2O5、WO3、SnO2、Bi2O3、NiO、Cu2O、SiO、SiO2、MoS2、InPb、RuO2、CeO2When used, the photocatalyst may be added with metals such as Pt, Rh, Ag, Cu, Sn, Ni, and Fe, and metal oxides thereof. Among them, titanium dioxide (TiO) is most commonly used2) Because it is harmless to the human body, and has excellent photocatalytic activity and good resistance to photo-etching, and is low in cost.
Titanium dioxide absorbs energy at wavelengths less than 388nm and reacts to generate electrons (conduction band) and holes (valence band). Therefore, glow lamps and mercury lamps can be used as light sources to generate ultraviolet rays in addition to solar lamps. The electronsand holes generated by the above reaction are at 10-12Second to 10-9And re-combine with each other within seconds. However, if contaminants adsorb to the surface before the electrons and holes recombine, the electrons and holes can decompose the contaminants.
The reaction mechanism of this photocatalyst can be represented by the following reaction formulas 1 to 5.
[ reaction formula 1]
[ reaction formula 2]
[ reaction formula 3]
[ reaction formula 4]
[ reaction formula 5]
In order to obtain photocatalytically active substances capable of removing contaminants by adsorption and decomposition, extensive studies have been made on a method for producing a coating sol composition containing a photocatalyst such as titanium dioxide. For example, PCT publication No. WO96/029375 discloses an anti-fogging technique that can prevent the formation of fog or water droplets on a transparent substrate such as a mirror, a lens, and a flat plate by coating a photocatalyst layer on the substrate. The technique is also practically used in the field of antifouling, for example, filters for air purifiers and filters for removing odor components (e.g., smoke of cigarettes) using titanium dioxide as a photocatalyst, antibacterial filters for wateror air having an antibacterial function, and antifouling for glass and tile. Furthermore, a filter coated with a photocatalyst can be used for the photocatalytic system for decomposing volatile organic compounds. However, since the photocatalytic reaction is a surface reaction, it is required to develop a technology capable of adsorbing a large amount of organic pollutants or odorous substances.
The most commonly used method of coating a photocatalyst by a liquid phase is to prepare a sol composition starting from an alkoxide of titanium and coat a support with the composition (Japanese patent laid-open No. 5-253544). However, this method requires complicated steps such as formation of photocatalytic particles on the support after coating, formation of anatase crystals having high photocatalytic activity, and sintering at a temperature ranging from 400 ℃ to 600 ℃ to attach them to the support. These complicated steps make the production cost high.
Secondly, the application of the above method is limited to coating on polymer materials having poor heat resistance, such as plastics. Further, although photocatalytic coating can be performed on ceramic tiles and ceramics having good heat resistance and then treatment at high temperature is performed, there is a problem such as large energy consumption.
Further, vapor phase photocatalytic coating methods that do not employ a photocatalytic coating sol composition include a sputtering method or a chemical vapor deposition method as in Japanese patent laid-open No. 60-44053. However, such methods also have problems such as high initial investment due to expensive equipment, large electric power consumption, and a prolonged production period with an increase in the thickness of the coating film.
In addition, if a titania thin film is formed on a support by a sol-gel method, it takes a long time to decompose contaminants because the contaminants are on the photocatalyst-containing thin filmThe contact area of the dye is limited. In order to effectively remove contaminants from the environment using a photocatalyst, it is necessary to increase the surface area of the photocatalyst or increase the intensity of a light source. In particular, about 10% is required for a filter of an air processing apparatus such as an air cleaner and an air conditioner for removing an odor substance and the like-3The treatment time of seconds, and therefore, it is required to develop a coating sol having a high adsorption force and a high photocatalytic activity.
Conventionally, in order to uniformly disperse different types of particles with each other in a solution state, it is necessary to mechanically mix different types of sol compositions (U.S. Pat. No.5,591,380), or to simultaneously dissolve two alkoxides as starting materials in a solvent, in order to prepare a sol composition (U.S. Pat. No.4,176,089). However, when two sol compositions are mixed, the stability of the sol composition is lowered and is converted into a gel in a short time. During the coating process, the coating film becomes thick and delaminates from the support after heat treatment. Moreover, this method has a disadvantage in that when the sol particles are dispersed by simultaneously dissolving the starting materials, the operating conditions must be precisely controlled.
The present inventors have conducted research and development on a photocatalytic coating composition having high adsorption and high photocatalytic activity, and as a result, have completed the present invention based on the following findings.
Disclosure of Invention
An object of the present invention is to provide a photocatalytic coating sol composition capable of preventing delaminationof secondary contaminants generated by an instantaneous photocatalytic reaction and having high photocatalytic activity, and a method for preparing the same.
It is another object of the present invention to provide a method capable of decomposing and removing environmental pollutants, harmful microorganisms, etc. by applying the photocatalytic coating sol composition on a filter for water treatment and air treatment using, for example, a spraying method or a dipping method.
Accordingly, one aspect of the present invention provides a photocatalytic coating sol composition comprising 0.1 to 20% by weight of a photocatalyst, 0.1 to 10% by weight of an inorganic adsorbent, 1 to 20% by weight of an inorganic binder and 55 to 95% by weight of an organic solvent.
Another aspect of the present invention provides a photocatalytic coating sol composition comprising 0.1 to 20% by weight of a photocatalyst, 0.1 to 10% by weight of an inorganic adsorbent, 1 to 20% by weight of an inorganic binder, 55 to 95% by weight of an organic solvent, and 0.1 to 10% by weight of a metal compound.
Yet another aspect of the present invention provides a method for preparing the photocatalyst coating sol composition, the method comprising the steps of: mixing 1 to 20% by weight of an inorganic binder and 55 to 95% by weight of an organic solvent, and if necessary, 0.1 to 0.5% by weight of a strong acid or a strong base; stirring at 1000 to 1500rpm for 10 to 30 minutes at room temperature; adding 0.1 to 20 wt% of photocatalyst powder and 0.1 to 10 wt% of inorganic adsorbent to the mixture; then treating in an ultrasonic device for 10 to 50 minutes; if desired, 0.1 to 10% by weight of a metal compound is then added to the mixture.
The photocatalyst is selected from TiO2、ZnO2、ZnO、CaTiO、WO3、SnO2、MoO3、Fe2O3、InP、GaAs、BaTiO3、KNbO3、Fe2O3Or Ta2O5Preferably TiO2And/or ZnO, either alone or as a mixture of at least two thereof may be used. The small-sized photocatalyst particles have higher photocatalytic activity. The average diameter of the particles should therefore be between 1 and 50nm, preferably 1 to 10 nm.
In addition, the reaction rate of the photocatalyst may be increased by adding 0.01 to 5% by weight of a metal or an oxide of a metal, such as palladium, platinum, radium, tungsten, gold, silver, and copper, based on the total weight of the photocatalyst. Further, by mixing the photocatalyst with a hindered amine light stabilizer and a triazole ultraviolet absorber, damage of the photocatalytic coating film caused by photocatalytic reaction can be suppressed, thereby improving the durability of the photocatalyst.
The inorganic adsorbent of the present invention is not particularly limited, but is preferably a highly adsorptive inorganic material capable of adsorbing odor substances and harmful substances in a photocatalytic reaction, and more preferably, for example, a silicate containing magnesium or calcium, talc, diatomaceous earth, or zeolite coated with silver or copper ions.
Inorganic binders which can be employed in the present invention are, for example, isopropoxide compounds, silane compounds, etc., preferably isopropoxide compounds such as titanium isopropoxide. In addition, in order to control the hydrolysis rate of the inorganic binder, a small amount of an acid or base catalyst may be added.
The organic solvent used in the present invention may be a lower alkyl alcohol, preferably absolute ethyl alcohol or isopropyl alcohol, etc.
Further, the metal compound of the present invention is not particularly limited, but a substance capable of improving the antibacterial action and the color of the raw material is preferable, and one or a mixture of plural substances of the following is preferably used: copper compounds such as copper acetylacetonate (copper (II)) and copper acetate monohydrate (copper (II)) and the like, silver compounds such as silver acetate and the like, ferric oxide, mercury sulfide, cadmium red, ochre, cadmium yellow, emerald green, chromium oxide green, prussian blue, cobalt blue, manganese or carbon black, and more preferably copper compounds.
The preparation of the photocatalytic coating sol composition of the present invention is illustrated below:
first, 1 to 20% by weight of an inorganic binder and 55 to 95% by weight of an organic solvent, and if necessary, 0.1 to 0.5% by weight of a strong acid or a strong base are mixed, followed by the step of stirring the mixture at room temperature at 1000 to 1500rpm for 10 to 30 minutes. Then, 0.1 to 20 wt% of photocatalyst powder was added to the mixture.
To the mixture, 0.1 to 10% by weight of an inorganic adsorbent is added, followed by treatment in an ultrasonic device for 10 to 50 minutes, so as to obtain the coating sol composition of the present invention. At this time, the inorganic adsorbent is adsorbed on the coating film, and harmful substances such as odor substances, primary decomposed substances, etc. are decomposed by the photocatalyst, and after the primary decomposed substances are photocatalyzed, secondary pollutants are adsorbed on the coating film, so that the harmful substances are less likely to be emitted into the air by the photodecomposition of the photocatalyst.
Further, if necessary, in order to enhance the antibacterial function of the photocatalytic coating sol composition of the present invention, or in order to enhance the color development of a coating film subjected to ultraviolet irradiation, 0.1 to 10% by weight of a metal compound, preferably 0.2 to 5% by weight of a metal compound may be used.
Since the photocatalyst coating sol composition of the present invention can be uniformly dispersed on a coating film together with various oxides, the method of the present invention is easier to use and more commercially valuable than the existing methods. Also, in order to control the hydrolysis rate of the inorganic binder, a small amount of an acid or base catalyst may be added.
The photocatalytic coating sol composition of the present invention can be coated on a desired substrate and then dried, and the coating method includes a printing method, a spray coating method, a dipping method, and the like, and preferably a spray coating method or a dipping method. Among them, the drying temperature in the case of the spray method and the dipping method depends on the solvent, and is usually 50 to 200 ℃ and preferably 100 to 150 ℃.
The substrate is not particularly limited, but is preferably any material capable of being coated with the photocatalytic coating sol composition prepared according to the present invention. For example, the substrate includes various carriers required to have antibacterial, deodorizing, pollution control, etc., or filters of apparatuses for water treatment or air pollution prevention, as well as metals, alloys, glasses, curtains, wallpaper, packaging, plastics, and paper.
When the photocatalytic coating sol composition is applied to a substrate, the thickness of the coating film must be controlled according to the application. If the thickness of the coating film is more than 0.1. mu.m, the photocatalytic layer adheres strongly to the substrate, and a coating structure having high durability can be obtained. In addition, as the thickness of the coating film increases, the photocatalytic activity also increases.
On the other hand, if the thickness of the coating film is more than 5 μm, the photocatalytic activity is not increased therewith because the light source cannot be sufficiently transmitted to the bottom of the photocatalyst layer. Since the photocatalytic activity is high when the thickness is less than 5 μm, the photocatalytic coating film is preferably selected in accordance with the light transmission characteristics.
Further, in order to improve the adsorption of contaminants, it is effective to control the thickness of the coating film in the range of 20 to 50 μm. Therefore, the thickness of the photocatalyst layer can be determined to be in the range of 5 to 50 μm.
The photocatalytic coating sol composition of the present invention can be applied to various carriers required to have antibacterial, deodorizing and pollution-controlling effects, for example, indoor articles such as curtains, wall papers; articles of everyday use such as tents, umbrellas, scarves, etc.; packaging containers such as food packaging and the like; agricultural fields such as seedling growing agricultural films (rain farm films) and the like. Metals having a photocatalytic function can also be used as the base material in combination with single metals such as aluminum, iron, copper, etc., and various alloys such as stainless steel, magnesium aluminum manganese (pearl), brass, aluminum alloys, titanium alloys, etc.
Further, when a general coating material and a colored halftone are applied on a metal sheet or plate according to the shape or quality of the metal used, a coating film composed of the photocatalytic coating sol composition of the present invention can be formed on the metal sheet or plate. If the coating film of the adhesive layer and the photocatalyst has high light transmittance and transparency, the color tone of the base coating material is not deteriorated, and thus the practicability thereof can be improved.
The substrate structure of the photocatalyst of the present invention is likely to simultaneously function, for example, when it is applied to window glass of automobiles or various transportation means, window glass of buildings, filter of refrigerators, refrigerated showcases or environmental purification systems, it can decompose harmful substances by its function and can be antibacterial and deodorant, thereby enhancing the anti-contamination function of the glass surface.
Specifically, the photocatalyst of the present invention can be used to coat plastic filters (e.g., polyethylene filters, polypropylene filters, etc.) of environmental cleaning systems, air delivery cleaners, and air cleaners.
Other objects and advantages of the present invention will be more fully understood from the following detailed description taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 shows a graph of the photocatalytic activity of a metal mesh coated with a photocatalytic coating sol composition to which an inorganic adsorbent and a metal compound are not added.
Fig. 2 shows a graph of the photocatalytic activity of the metal mesh of example 6 of the present invention coated with a photocatalytic coating sol composition.
FIG. 3 shows a graph of the photocatalytic activity of the metal mesh of example 7 of the present invention coated with a photocatalytic coating sol composition.
Fig. 4 is a graph showing the results of an antibacterial experiment of metal nets coated with the photocatalytic coating sol composition prepared by the present invention and the photocatalytic coating sol composition to which the inorganic adsorbent and the metal ions are not added, respectively.
FIG. 5 is a graph showing the results of a discoloration test of a polyethylene filter coated with a photocatalytic coating sol composition according to the present invention.
FIG. 6 is a graph showing the results of an activity test of a polyethylene filter coated with the photocatalytic coating sol composition according to the present invention.
FIG. 7 is a graph showing the results of saturation activity test of a polyethylene filter coated with the photocatalytic coating sol composition according to the present invention.
FIG. 8 shows an electron micrograph of the surface of a polyethylene filter coated with the photocatalytic coating sol composition according to the present invention.
FIG. 9 shows an electron micrograph of a cross section of a polyethylene filter coated with the photocatalytic coating sol composition according to the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with preferred embodiments. The following examples do not limit the scope of the present invention.
Example 1
5% by weight of titanium isopropoxide [ Junsei Chemical Co., Ltd., Ltd.], 78.8% by weight of absolute ethanol and 0.2% by weight of hydrochloric acid were mixed, and stirred at 1200rpm for 20 minutes at room temperature. Then, 10% by weight of titanium dioxide powder [ Degussa P25, germany]was added to the mixture.
To the resulting mixed solution, 6 wt% of talc [DUKSAN purecograde co., Ltd.]was added, followed by treatment in an Ultrasonic equipment [ brasson Ultrasonic co., DHA-1000]for 30 minutes or more, to obtain a coating sol composition.
Example 2
5% by weight of titanium isopropoxide [ Junsei Chemical Co., Ltd., Ltd.], 78.5% by weight of absolute ethanol and 0.2% by weight of hydrochloric acid were mixed, and stirred at 1200rpm for 20 minutes at room temperature. Then, 10% by weight of titanium dioxide powder [ Degussa P25, germany]was added to the mixture.
To the resulting mixed solution, 6 wt% of talc [ DUKSAN purecograde co., Ltd.]was added, followed by treatment in an Ultrasonic device [ brasson Ultrasonic co., DHA-1000]for 30 minutes or more, and then to the resulting solution, 0.3 wt% of copper acetate monohydrate [ Junsei Chemical co., Ltd., japan]was added to obtain a coating sol composition.
Example 3
The same procedure as in example 1 was carried out, except that, instead of 6% by weight of talc, 5% by weight of diatomaceous earth [ DUKSAN PURE CHEMICAL Co., Ltd.]wasused.
Example 4
The same procedure as in example 2 was carried out except that, instead of 0.3% by weight of copper acetate monohydrate, 0.3% by weight of silver acetate hydrate [ Junsei chem.co., ltd., japan]was used.
Example 5
3% by weight of titanium dioxide [ Degussa P25, Germany], 93% by weight of ethanol and 0.2% by weight of hydrochloric acid were mixed, followed by stirring at 1200rpm for 20 minutes at room temperature.
To the mixed solution was added 3.8% by weight of magnesium silicate [ Aldrich, usa], followed by treatment in an Ultrasonic equipment [ brasson Ultrasonic co., DHA-1000]for 30 minutes or more, and then to the resulting solution was added 0.3% by weight of copper acetylacetonate [ Junsei Chemical co., ltd., japan], to obtain a coating sol composition.
Example 6
The coating sol composition prepared in example 1 was applied to a metal mesh [ Al losses 4X 8mm, 0.4T, Hyungjei MetalasCo., Korea]by a spray method (diameter: 1.5, pressure: 4kg) at room temperature, and then dried at 120 to 150 ℃ to obtain a photocatalyst-coated metal mesh.
Example 7
The same procedure as in example 6 was conducted, except that the coating sol composition obtained in example 1 was not used, but the coating sol composition obtained in example 2 was used.
Example 8
The same procedure as in example 6 was conducted, except that the coating sol composition obtained in example 1 was not used, but the coating sol composition obtained in example 3 was used.
Example 9
The same procedure as in example 6 was conducted, except that the coating sol composition obtained in example 1 was not used, but the coating sol composition obtained in example 4 was used.
Example 10
The coating sol composition prepared in example 5 was applied to a polyethylene filter [ SW80M, Shinwu Co., Korea]by a spray coating method (diameter: 1.5, pressure: 4kg) at room temperature, and then dried at 60 deg.C, thereby obtaining a photocatalyst-coated polyethylene filter.
Comparative example
5% by weight of titanium isopropoxide [ Junsei Chemical Co., Ltd., Ltd.], 95% by weight of absolute ethanol, and 0.2% by weight of hydrochloric acid were mixed, and stirred at 1200rpm for 20 minutes at room temperature. Then, 10% by weight of titanium dioxide powder [ Degussa P25, germany]was added to the mixture. The resulting solution was then treated in an Ultrasonic equipment [ BRANSON Ultrasonic Co., DHA-1000]for 30 minutes or more, thereby obtaining a coating sol composition.
Subsequently, the resulting coating sol composition was applied to a metal mesh [ Al losses 4X 8mm, 0.4T, Hyungjei metals Co., Korea]by a spray method (diameter: 1.5, pressure: 4kg) at room temperature, and then dried at 60 ℃ to obtain a metal mesh coated with a photocatalyst containing no inorganic adsorbent and metal compound.
Test of
i) Tests with expanded metal
Saturation Activity assay
The photocatalyst-coated metal nets obtained in examples 6 to 9 and comparative example were placed in a plurality of batch reactors, respectively, by adding trichloroethylene (C)2HCl3TCE) to determine the rate of decomposition. The initial concentration of trichloroethylene was about 2000ppm and the volume of the reactor was 125cm3Using black light lamp (wavelength 300nm to 368nm, maximum wavelength 400nm) [4W BLB, Sankyodenki, Japan]The metal mesh was irradiated and then analyzed by Fourier transform Infrared Spectroscopy (FTIR) [ PerkinElmer, Spectrum one FT-IR spectrometer]The decomposition rate of trichloroethylene was measured.
The results of the measurement are shown in FIGS. 1 to 3.
Fig. 1 shows the activity of the metal mesh coated with the photocatalytic coating sol composition prepared by the comparative example, to which the inorganic adsorbent and the metal compound are not added. FIG. 2 shows a graph of the photocatalytic activity of a metal mesh coated with a photocatalytic coating sol composition prepared in example 6 of the present invention. FIG. 3 shows the activity of the metal mesh coated with the photocatalytic coating sol composition prepared by example 7 of the present invention.
As shown in FIG. 1, as a result of decomposition by the photocatalyst, trichloroethylene was decomposed within several minutes (10 to 20 minutes), but phosgene as an intermediate was detected when Trichloroethylene (TCE) was used as a reactantPeak of (C-Cl: 856 cm)-1，C＝O：1825cm-1)。
This indicates that trichloroethylene can be rapidly decomposed by the photocatalytic coating sol composition, but that harmful phosgene may be emitted into the air.
Therefore, if the inorganic adsorbent and the metal compound are not added in the preparation of the photocatalytic coating sol composition, the resulting photocatalytic coating sol composition is not suitable for a photocatalyst filter for air conditioners and air purifiers.
In contrast, as shown in FIGS. 2 and 3, the activity of the photocatalyst was reduced by half, and after the decomposition of trichloroethylene, a peak of phosgene corresponding to a secondary contaminant (by-product) was not detected, as compared with the result obtained from the metal mesh of the comparative example. This indicates that the secondary pollutants are not emitted into the air since they are adsorbed by the added inorganic substance having high adsorbability.
Antibacterial property test
Two petri dishes (diameter: 100mm, height: 15mm) were prepared, in which cultured Escherichia coli (Escherichia coli) was contained, and two metal mesh samples having a size of 3cm × 6cm prepared by example 8 of the present invention. Then, the two samples were placed in two petri dishes containing Escherichia coli, respectively, and one of the petri dishes was irradiated with a black light lamp [4W BLB, Sankyo Denki, Japan], while the other petri dish was not irradiated with ultraviolet light. The wavelength of the black light lamp is 300nm to 368nm, the maximum wavelength is 400nm, the power is 4W, and the installation distance is 5 cm. In this experiment, the number of initial colonies of Escherichia coli used was 70 per petri dish.
The results are shown in FIG. 4.
As shown in FIG. 4, it was found that Escherichia coli in the petri dish was completely killed after 6 hours of irradiation with ultraviolet rays. In the test under the same conditions without irradiation, it was found that the number of colonies of Escherichia coli was not decreased.
ii) testing with polyethylene filters
Decolorization test
To measure the adsorption activity of the polyethylene filter coated with a photocatalytic coating sol composition prepared in example 10, 25ml of 0.8ppm methylene blue (M.B.) [ methylene blue 2-3 hydrate, Junsei Chem, co.ltd., Japan]aqueous solution was added to a petri dish (diameter: 100mm, height: 15mm), the photocatalyst-coated polyethylene filter prepared in example 10 was immersed in the petri dish, and then the degree of discoloration of the aqueous solution was observed by irradiation with a black light lamp [4W BLB, Sankyo Denki, Japan]. The wavelength of the black light lamp is 300nm to 368nm, the maximum wavelength is 400nm, the power is 4W, and the black light lamp is arranged at a position 13cm away from the culture dish with the cover.
The results are shown in FIG. 5. As can be seen in fig. 5, the clearance of the aqueous solution of methylene blue (M.B.) was 84.4% after 30 minutes.
Deodorization test
In order to measure the deodorization ratio in a gaseous state, the photocatalyst-coated polyethylene filter obtained in example 10 was placed in the center of a closed SUS reactor having a capacity of 125L, and then Trimethylamine (TMA) as an offensive odor substance was injected into the reactor at a rate of 0.83 m/s. After the injection of Trimethylamine (TMA), the clearance over time was measured and the results are shown in fig. 6.
As shown in fig. 6, the clearance of trimethylamine after 10 minutes was 82.2%, and the clearance of trimethylamine after 30 minutes was 90.41%.
Saturation Activity test
The polyethylene filter coated with the photocatalytic coating sol composition obtained in example 10 was placed in a closed SUS reactor having a capacity of 125L, a circulation fan was installed, and then Trimethylamine (TMA) as an offensive odor substance was injected into the reactor.
The inside air was caused to flow at a rate of 0.83m/s by the circulating fan, and left to stand for about 1 hour. Then, the concentration of Trimethylamine (TMA) in the reactor was measured.
The above experiment was designated as cycle 1, and after completion of cycle 1, the photocatalyst-coated polyethylene filter was irradiated with a black light lamp [4W BLB, sankyo denki, japan]for 1 hour, and then the above procedure was repeated. The 2 nd experiment was designated as cycle 2, and the above two cycles were repeated.
The results are shown in FIG. 7. As can be seen from FIG. 7, the scavenging effect of trimethylamine was 1002.7ppm and the scavenging efficiency of Trimethylamine (TMA) was maintained at about 90% in 53 cycles.
Antibacterial test
The antibacterial ability of the polyethylene filter coated with the photocatalytic coating sol composition prepared in example 10 was measured by the shaking flask method.
The shaking flask method herein can be carried out as follows:
first, after inoculating a known bacterium to a test sample (30 pieces of 1cm × 1cm squares) and a control sample (30 pieces of 1cm × 1cm squares), an inoculum solution and a certain amount of a neutralization solution were mixed, then the cultured bacterium was extracted, and after measuring the number of bacteria in the neutralization solution, the reduction rate of the bacterium with respect to the test sample of the control sample was calculated by the following equation 1.
The number of bacteria of the test bacterial solution was measured after stirring and incubating at 35. + -. 1 ℃ at a rate of 150 times/min for 24 hours using a phosphate buffer solution (pH 7.0. + -. 0.2) as a neutralization solution and Tween 80 (0.05%) as a surfactant.
[ equation 1]
The bacteria reduction rate is [ (the number of bacteria in the blank sample after 24 hours-the number of bacteria in the applied sample after 24 hours)/the number of bacteria in the blank sample after 24 hours]× 100
The blank sample therein is an uncoated initial sample, such as a polyethylene filter that is not coated with the photocatalytic coating sol composition.
Known strains used in the above shake flask method are Staphylococcus aureus (Streptococcus aureus) ATCC 6538 and Escherichia coli (Escherichia coli) ATCC 25992.
The results are shown in table 1 below.
As can be seen from Table 1, when the polyethylene filters coated with photocatalytic sol compositions of examples 7 and 10 were used, the growth rate of microorganisms was low, while the bacteria of the blank sample increased by 30% to 40%.
TABLE 1
| Bacterial strains | Golden yellow grape ball Bacterium ATCC 6538 | Golden yellow grape ball Bacterium ATCC 6538 | Escherichia coli ATCC 25992 | Escherichia coli ATCC 25992 |
| Test specimen | Blank space | Example 7 | Blank space | Example 10 |
| Moment after inoculation | 1.8×105 | 1.8×105 | 1.7×105 | 1.7×105 |
| 24 hours after inoculation | 1.7×105 | ＜100 | 1.7×105 | ＜100 |
| Reduction ratio of bacteria (%) | - | 99.9 | - | 99.9 |
| Growth rate (%) | 33.9 | - | 37.1 | - |
Antimicrobial testing
The polyethylene filter coated with the photocatalytic coating sol composition prepared in example 10 was tested for antimicrobial ability according to ASTM G-21 test standard.
Known strains used in the ASTM G-21 test standard are Aspergillus niger (ATCC 9642), Penicillium pinophilum (Penicillium pinophilum) ATCC 11797, Chaetomium globosum (Chaetomium globosum) ATCC 6205, Gliocladium virens (Gliocladium virens) ATCC 9645 and Aureobasidium pullulans (Aureobasidium aplululus) ATCC 15233.
The results obtained are of the ASTM G-21 test standard grade 0. Wherein, 0 grade indicates that the known strain does not grow.
In addition, fig. 8 and 9 show electron micrographs of the surface and the cross section of the polyethylene filter prepared in example 10, respectively.
It was confirmed from FIGS. 8 and 9 that the surface coated with the photocatalytic coating sol composition was porous and the coating thickness thereof was about 20 μm.
Industrial applicability
As described above, the present invention employs an inorganic adsorbent. The present invention provides an effective technique that is applicable to an environmental pollutant treating system or air conditioning equipment such as an air conditioner and an air purifier.
Claims (11)
1. A photocatalytic coating sol composition comprising 0.1 to 20% by weight of a photocatalyst, 0.1 to 10% by weight of an inorganic adsorbent, 1 to 20% by weight of an inorganic binder, and 55 to 95% by weight of an organic solvent.
2. The photocatalytic coating sol composition according to claim 1, further comprising 0.1 to 10% by weight of a metal compound.
3. The photocatalytic coating sol composition according to claim 2, wherein the metal compound is selected from the group consisting of a copper compound, a silver compound, ferric oxide, mercury sulfide, cadmium red, ochre, cadmium yellow, emerald green, chromium oxide green, prussian blue, cobalt blue, manganese, and carbon black.
4. The photocatalytic coating sol composition according to claim 1, wherein the photocatalyst is selected from the group consisting of TiO2、ZnO2、ZnO、CaTiO、WO3、SnO2、MoO3、Fe2O3、InP、GaAs、BaTiO3、KNbO3、Fe2O3And Ta2O5Group (d) of (a).
5. The photocatalytic coating sol composition according to claim 4, wherein the photocatalyst particles have an average diameter of 5 to 50 nm.
6. The photocatalytic coating sol composition according to claim 1, wherein the inorganic adsorbent is a silicate of magnesium or calcium, talc, diatomaceous earth, or zeolite coated with silver and/or copper ions.
7. The photocatalytic coating sol composition according to claim 1, wherein the inorganic binder is an isopropoxide compound or a silane compound.
8. The photocatalytic coating sol composition according to claim 1, wherein the organic solvent is a lower alkyl alcohol.
9. A method for preparing a photocatalytic coating sol composition, the method comprising the steps of:
mixing 1 to 20% by weight of an inorganic binder and 55 to 95% by weight of an organic solvent, and if necessary, 0.1 to 0.5% by weight of a strong acid or a strong base, and then stirring the mixture at room temperature at 1000 to 1500rpm for 10 to 30 minutes; and
to the mixture, 0.1 to 20% by weight of photocatalyst powder and 0.1 to 10% by weight of inorganic adsorbent are added, and if necessary, 0.1 to 10% by weight of metal compound is further added, followed by treatment in an ultrasonic device for 10 to 50 minutes.
10. A substrate prepared by applying the photocatalytic coating sol composition according to any one of claims 1 to 8 by a printing method, a spraying method or a dipping method, followed by drying.
11. The substrate of claim 10, wherein the substrate is an aluminum filter, a polyethylene filter, or a polypropylene filter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20010022270 | 2001-04-25 | ||
| KR0022270/2001 | 2001-04-25 |
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| Publication Number | Publication Date |
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| CN1513040A true CN1513040A (en) | 2004-07-14 |
| CN1222580C CN1222580C (en) | 2005-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028107993A Expired - Fee Related CN1222580C (en) | 2001-04-25 | 2002-04-25 | Photocatalytic coating material having photocatalytic activity and adsorption property and method for preparating same |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20050126428A1 (en) |
| KR (1) | KR100518956B1 (en) |
| CN (1) | CN1222580C (en) |
| WO (1) | WO2002085989A1 (en) |
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Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6044053A (en) * | 1983-08-19 | 1985-03-08 | Toshiba Corp | Photo-reactive membrane like catalyst |
| DK157816C (en) * | 1985-06-11 | 1990-07-09 | Malning Hf | PAINT ON ACRYLIC BASIS, WHICH PROVIDES WATER DUTIES, BUT WATER Vapor permeable cover |
| US5616532A (en) * | 1990-12-14 | 1997-04-01 | E. Heller & Company | Photocatalyst-binder compositions |
| US5591380A (en) * | 1991-12-20 | 1997-01-07 | United Technologies Corporation | Preparation of alumina-silica sol gel compositions |
| EP0792687B1 (en) * | 1994-11-16 | 2003-01-15 | Toto Ltd. | Photocatalytic functional material and method of production thereof |
| JP3690864B2 (en) * | 1996-03-29 | 2005-08-31 | 株式会社ティオテクノ | Production method of photocatalyst |
| DE69730006T2 (en) * | 1996-10-08 | 2004-12-02 | Nippon Soda Co. Ltd. | PHOTOCATALYTIC COATING COMPOSITION AND PHOTOCATALYST CONTAINING SYSTEM |
| JPH1161044A (en) * | 1997-08-07 | 1999-03-05 | Jsr Corp | Building material |
| CA2312788C (en) * | 1997-12-02 | 2009-01-06 | Showa Denko Kabushiki Kaisha | Photocatalytic oxide composition, thin film, and composite |
| JPH11279446A (en) * | 1998-03-27 | 1999-10-12 | Tokushu Paper Mfg Co Ltd | Photocatalytic coating material, its production and photocatalytic deodorizing paper produced by using the coating material |
| JP3852284B2 (en) * | 1998-07-30 | 2006-11-29 | 東陶機器株式会社 | Method for producing functional material having photocatalytic function and apparatus therefor |
| JP4034885B2 (en) * | 1998-09-17 | 2008-01-16 | 石原産業株式会社 | Photocatalytic coating composition |
| KR20000038564A (en) * | 1998-12-08 | 2000-07-05 | 배상태 | Coating composition for preventing glass from being dirty and its use |
| KR20000075273A (en) * | 1999-05-31 | 2000-12-15 | 윤종용 | Arm of wafer movement apparatus |
| KR100357765B1 (en) * | 1999-11-25 | 2002-10-25 | (주)바이오세라 | Process of preparation of photo-semiconductive filter for deodorization and antibacterial activity and photo-semiconductive filter for deodorization and antibacterial activity used this process |
| US6569520B1 (en) * | 2000-03-21 | 2003-05-27 | 3M Innovative Properties Company | Photocatalytic composition and method for preventing algae growth on building materials |
| EP1166871A1 (en) * | 2000-06-21 | 2002-01-02 | Fuji Photo Film B.V. | Photocalytic sheet of film and its manufacturing process |
| JP3454817B2 (en) * | 2000-11-17 | 2003-10-06 | 有限会社環境デバイス研究所 | Visible light responsive paints, coatings and articles |
| KR100403275B1 (en) * | 2001-03-30 | 2003-10-30 | 주식회사 매그린 | Photocatalytic Coating Composition, Preparation Method Thereof and Coated Body Using the Same |
| KR100442919B1 (en) * | 2001-09-13 | 2004-08-02 | 재단법인 포항산업과학연구원 | Preparation method for photocatalyst sol having high transparency photoactivity |
| EP1437397B1 (en) * | 2001-09-27 | 2009-08-12 | National Institute of Advanced Industrial Science and Technology | Cleaning agent |
| US6673738B2 (en) * | 2001-11-28 | 2004-01-06 | K.K. Ueda Shikimono Kojyo | Photocatalytic active carbon, colored photocatalytic active carbon, coloring active carbon, and deodorant and adsorption product using them |
| US7414009B2 (en) * | 2001-12-21 | 2008-08-19 | Showa Denko K.K. | Highly active photocatalyst particles, method of production therefor, and use thereof |
| EP1504816A4 (en) * | 2002-03-25 | 2010-11-24 | Osaka Titanium Technologies Co | Titanium oxide photocatalyst, process for producing the same and application |
-
2002
- 2002-04-25 CN CNB028107993A patent/CN1222580C/en not_active Expired - Fee Related
- 2002-04-25 WO PCT/KR2002/000769 patent/WO2002085989A1/en not_active Application Discontinuation
- 2002-04-25 US US10/475,514 patent/US20050126428A1/en not_active Abandoned
- 2002-04-25 KR KR10-2002-0022687A patent/KR100518956B1/en not_active IP Right Cessation
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Also Published As
| Publication number | Publication date |
|---|---|
| US20050126428A1 (en) | 2005-06-16 |
| KR100518956B1 (en) | 2005-10-05 |
| WO2002085989A1 (en) | 2002-10-31 |
| CN1222580C (en) | 2005-10-12 |
| KR20020083455A (en) | 2002-11-02 |
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