KR20180108530A - Photocatalytic Composition, Method for Preparing the Same and Lighting Device Containing the Same - Google Patents

Abstract

The present invention relates to a photocatalytic composition, a manufacturing method thereof and a lighting device containing the same, and more specifically, to a photocatalytic composition, which maximizes the catalytic reaction efficiency by stable activity even in ultraviolet rays, visible light and the like to be able to continuously remove harmful substances and to perform deodorizing and sterilizing functions and other functions, a manufacturing method thereof and a lighting device containing the same.

Description

TECHNICAL FIELD [0001] The present invention relates to a photocatalytic composition, a method of manufacturing the same, and a lighting apparatus including the photocatalytic composition.

TECHNICAL FIELD The present invention relates to a photocatalytic composition, a method for producing the same, and a lighting apparatus including the photocatalytic composition. More particularly, the present invention relates to a photocatalytic composition excellent in sterilization and deodorization performance, a method for producing the same, and a lighting apparatus containing the photocatalytic composition.

In general, catalysts are used to treat materials that pollute various environments. In particular, photocatalyst is a type of semiconductor ceramics, which uses light as an energy source to promote catalytic reaction, that is, oxidation / reduction reaction, It is a semiconductor material that decomposes.

In addition, when photocatalyst receives light, it completely oxidizes toxic organic matter into carbon dioxide (CO ₂ ) and water (H ₂ 0) using oxygen (O ₂ ) or water (H ₂ O) Can be applied to the oxidative decomposition reaction of refractory organic materials using a low-energy, renewable energy source.

When titanium dioxide, which is a typical photocatalyst, irradiates ultraviolet rays on the surface, electrons are generated on the surface and holes are formed in the place where electrons are generated. These electrons and holes have strong oxidizing power and reducing power respectively and oxidize moisture in air to generate OH radical Since the OH radical has a stronger oxidizing power than hydrogen peroxide, chlorine and ozone used for disinfection, the molecular bond of the organic matter can be easily decomposed.

In addition, titanium dioxide can be used semi-permanently because it does not change itself even if it receives light and its chemical stability that is not eroded by acid, base and organic solvent, and that active oxygen generated by photoreaction has higher oxidizing power than chlorine or ozone, And is most widely used because it has the ability to decompose all organic matter into carbon dioxide (CO ₂ ) and water (H ₂ O).

As such, the photocatalyst has the advantage of removing not only acidic or alkaline odorous substances, volatile organic compounds but also bacteria and is semi-permanent.

However, because of the reaction characteristic that causes the reaction by light, the reaction rate is slower than that of general chemicals, and when the deodorization and sterilization are performed quickly, it is difficult to apply the photocatalyst. In addition, there has been a problem that it is difficult to apply a deodorizing and sterilizing method using a mechanical method such as discharging and adsorption for economic deodorization, sterilization and the like due to economical burden such as facility cost and maintenance cost.

Conventionally, Korean Patent No. 0757103 discloses a wax composition and a manufacturing method for mixing water, titanium dioxide, a citric acid ester plasticizer and the like. However, since the decomposition reaction of the photocatalyst which reacts with ultraviolet rays and visible light quickly, It is difficult to completely remove the odor substances and ultimately to remove them.

Korean Patent No. 1173445 discloses a photocatalytic composition comprising a titanium dioxide photocatalyst, a surfactant and citric acid in order to maximize a photocatalytic reaction efficiency by causing a photochemical reaction even in ultraviolet rays and visible rays. However, There is a limit to effective sterilization and antimicrobial treatment that require continuous reaction.

Korean Patent No. 0757103 Korean Patent No. 1173445

The main object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a photocatalyst composition capable of continuously removing harmful substances, deodorizing and sterilizing action by maximizing catalytic reaction efficiency by stable catalytic activity even in ultraviolet rays, And a manufacturing method thereof.

The present invention also provides a lighting device containing the photocatalytic composition.

According to an aspect of the present invention, Titanium (A); At least one first metal (B) selected from the group consisting of beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr) and barium (Ba); And at least one second metal (C) selected from the group consisting of lanthanum (La), cerium (Ce) and samarium (Sm) is contained in the photocatalytic composition.

(A): the first metal (B) and the second metal (C) = 100: 1, and the titanium (A), the first metal (B) and the second metal (C) 1 to 1: 1.

In a preferred embodiment of the present invention, the first metal (B) and the second metal (C) contain a first metal (B): a second metal (C) in a weight ratio of 10: 1 to 1:10 .

Another embodiment of the present invention is a method of manufacturing a semiconductor device comprising: (a) at least one first metal (B) selected from the group consisting of beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr) Mixing a precursor and at least one second metal (C) precursor selected from the group consisting of lanthanum (La), cerium (Ce) and samarium (Sm) into a solvent; (b) impregnating the mixture of step (a) with a titanium (A) precursor; And (c) drying the impregnated material of the step (b), followed by calcination.

In another preferred embodiment of the present invention, the first metal (B) precursor and the second metal (C) precursor are independently selected from the group consisting of metal chlorides, metal nitrides and metal hydroxides .

In another preferred embodiment of the present invention, the titanium (A) precursor, the first metal (B) precursor and the second metal (C) precursor in the step (b) And the second metal (C) precursor in a weight ratio of 100: 1 to 1: 1.

In another preferred embodiment of the present invention, in the step (a), the first metal (B) precursor and the second metal (C) precursor are selected from the group consisting of a first metal (B) precursor: : 1 to 1:10 by weight.

In another preferred embodiment of the present invention, the step (c) is performed by drying at 110 ° C. or more for 6 hours or more, and then calcining at 400 to 650 ° C. for 2 hours or more.

In another preferred embodiment of the present invention, the solvent may be at least one selected from the group consisting of water, ethanol, propanol, 2-propanol and butanol.

Another embodiment of the present invention is directed to a method of manufacturing a semiconductor device comprising the steps of: (a) depositing a species selected from the group consisting of titanium (A) precursor, beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr) Mixing at least one first metal (B) precursor and at least one second metal (C) precursor selected from the group consisting of lanthanum (La), cerium (Ce) and samarium (Sm) into a solvent; And (b) adding an acid to the mixture of step (a) and stirring the mixture.

In another preferred embodiment of the present invention, the titanium (A) precursor, the first metal (B) precursor and the second metal (C) precursor are mixed with the titanium (A) precursor: ) Precursor and the second metal (C) precursor in a weight ratio of 100: 1 to 1: 1.

In another preferred embodiment of the present invention, in the step (a), the first metal (B) precursor and the second metal (C) precursor are selected from the group consisting of a first metal (B) precursor: In a weight ratio of 10: 1 to 1:10.

In another preferred embodiment of the present invention, stirring in the step (b) is performed by stirring at 20 to 200 ° C at 60 rpm or more for 3 hours or more.

In another preferred embodiment of the present invention, the acid may be at least one selected from the group consisting of nitric acid, hydrochloric acid and phosphoric acid.

In another preferred embodiment of the present invention, the acid and titanium precursor, the first metal (A) precursor and the second metal (B) precursor in step (b) are selected from the group consisting of an acid: titanium (A) precursor, Precursor and a second metal (C) precursor in a weight ratio of 10: 1 to 1: 100.

In another preferred embodiment of the present invention, the solvent may be at least one selected from the group consisting of water, ethanol, propanol, 2-propanol and butanol.

In another preferred embodiment of the present invention, the first metal (B) precursor and the second metal (C) precursor are independently selected from the group consisting of metal chlorides, metal nitrides and metal hydroxides. have.

Another embodiment of the present invention provides a lighting device comprising the photocatalyst composition.

The photocatalytic composition according to the present invention maximizes the catalytic reaction efficiency by stably activating the photocatalyst composition regardless of light, unlike the conventional photocatalytic composition, and is effective in removing toxic substances, deodorizing and sterilizing effects.

Further, since the lighting apparatus according to the present invention contains a photocatalyst composition which is excellent in removal of harmful substances, deodorization and sterilization effect with little influence on the lighting function, the photocatalyst can be easily activated by the light provided from the lighting apparatus, And the harmful substances adhered to the surface of the lighting apparatus are decomposed and removed to maintain the desired predetermined illuminance, and at the same time, the lighting apparatus can be used hygienically.

1 is a schematic view of an illumination device according to an embodiment of the present invention.
2 is a schematic view of an illumination apparatus according to another embodiment of the present invention.
FIG. 3 is a schematic view of an illumination apparatus according to another embodiment of the present invention, wherein (a) is a lighting apparatus coated with a photocatalyst on a reflector, and (b) is a lighting apparatus coated with a photocatalyst on a diffuser.
4 is a graph showing the results of measurement of formaldehyde (50 ppm) removal performance according to the catalyst composition oil (a) / (b) prepared in Example 1 of the present invention.
FIG. 5 is an image showing the bactericidal activity of Klebsiella pneumoniae ATCC 4352 of the catalyst composition prepared in Example 1 of the present invention, wherein (a) is an image before the catalyst composition is sprayed, (b) And images after 10 seconds.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In general, the nomenclature used herein is well known and commonly used in the art.

Throughout this specification, when an element is referred to as "including " an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise.

The present invention, in one aspect, relates to a titanium alloy composition comprising titanium (A); At least one first metal (B) selected from the group consisting of beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr) and barium (Ba); And at least one second metal (C) selected from the group consisting of lanthanum (La), cerium (Ce) and samarium (Sm).

More particularly, the photocatalytic composition according to the present invention includes titanium, a Group 2 metal and a lanthanide-based metal on the periodic table so as to react with oxygen and water in the air to exhibit the effect of a catalyst even when light is not present or absent.

The photocatalyst composition of the present invention comprises a first metal (B) serving to reduce the band gap energy so as to activate the photocatalytic reaction on the surface of titanium (Ti), a second metal (B) serving as a cocatalyst for activating the reaction between titanium and the first metal, The metal (C) protrudes from the surface to the air and holes are generated. The metal (C) is mixed with titanium (A), which plays a role of forming hydroxide and oxygen anion by oxidation reaction with oxygen and water in the air, And oxygen anions formed on the surface of the catalyst composition decompose the harmful components attached to the surface of the catalyst composition and remove bacteria and fungi to perform strong antibacterial and germicidal actions.

The titanium (A) has a band gap energy of 3.2 eV and receives light energy to cause electrons to protrude from the surface into the air and generate holes, which form hydroxyl and oxygen anions by oxygen and water in the air and oxidation and reduction reactions .

As the first metal (B), beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba), which are Group II metals, And may be at least one selected from the group consisting of.

The second metal (C) is a cocatalyst for activating the reaction between titanium and the first metal. The cocatalyst is composed of lanthanum metal (La), cerium (Ce) and samarium (Sm) And the like.

In this case, the weight ratio of the titanium, the first metal (B) and the second metal (C) may be titanium: first metal (B) and second metal (C) = 100: 1 to 1: (B) and the second metal (C) = 20: 1 to 1: 1, more preferably titanium: the first metal (B) and the second metal (C) 1: 1 < / RTI >

The weight ratio of the first metal (B) and the second metal (C) may be from 1: 1 to 1: 10, preferably from 1: 1 to 1: The first metal (B): the second metal (C) = 5: 1 to 1: 5 can be used as the second metal (C) = 7:

If the weight ratio of the titanium (A), the first metal (B), and the second metal (C) is out of the above range, the band gap energy of titanium can not be lowered and the reaction between oxygen in the air and water It is difficult to activate the reaction between the titanium and the first metal, resulting in degradation of the organic matter and deterioration of the sterilizing power.

If the weight ratio of the second metal to the first metal is less than 0.1, the reaction of the titanium with the first metal may not be activated, so that the decomposition of the organic material and the sterilizing power of the catalyst may be deteriorated. Rather, as side reactions that inhibit the reaction between titanium and the first metal are generated, decomposition of organic matter, disinfecting power and the like may be lowered.

In another aspect, the present invention provides a method of manufacturing a semiconductor device, comprising: (a) at least one first metal (B) precursor selected from the group consisting of beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), and barium And at least one second metal (C) precursor selected from the group consisting of lanthanum (La), cerium (Ce) and samarium (Sm) into a solvent; (b) impregnating the mixture of step (a) with a titanium (A) precursor; And (c) drying the impregnated material of step (b), followed by calcination.

More specifically, the method for preparing a photocatalytic composition according to the present invention comprises mixing a first metal precursor and a second metal precursor in a solvent, impregnating the titanium precursor with the mixture, drying the mixture, and firing the mixture.

The first metal (B) precursor may be at least one metal chloride selected from the group consisting of beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba) In the case of compounds containing beryllium as the first metal precursor, beryllium chloride, beryllium nitrate and beryllium hydroxide may be used as the hydroxide, magnesium chloride, magnesium nitrate and magnesium hydroxide in the case of magnesium, In the case of strontium, it may be strontium chloride, strontium nitrate and strontium hydroxide. In the case of barium, it may be barium chloride, barium nitrate and barium hydroxide.

The second metal (C) precursor is at least one metal chloride, metal nitride or metal hydroxide selected from the group consisting of lanthanum (La), cerium (Ce) and samarium (Sm) In the case of a compound containing lanthanum as the precursor, it may be lanthanum chloride, lanthanum nitrate and lanthanum hydroxide. In the case of cerium, it may be cerium chloride, cerium ammonium nitrate and cerium hydroxide. In the case of samarium, it may be samarium chloride and samarium hydroxide have.

The first metal precursor and the second metal precursor are mixed in a solvent. The solvent may be any solvent capable of dispersing the first and second metal precursors, and may be water or alcohol. Ethanol, propanol, 2-propanol, butanol, etc. may be used as the alcohol .

In this case, the amount of the solvent is not limited as long as it is an amount capable of sufficiently dissolving and dispersing the first metal (B) precursor and the second metal (C) precursor, 50 to 500 parts by weight of the first metal precursor can be dissolved and dispersed sufficiently stably without increasing the production cost.

The mixture of the first metal (B) precursor and the second metal (C) precursor thus mixed in the solvent is impregnated with the titanium precursor. The titanium precursor may be titanium oxide.

The content ratio of the titanium (A) precursor, the first metal (B) precursor and the second metal (C) precursor is in the range of from 100: 1 to 1: (B) and the second metal (C) = 50: 1 to 1: 1 by weight, preferably titanium: the first metal (B) The first metal (B) and the second metal (C) are impregnated in the titanium precursor such that the ratio of the metal (C) is 20: 1 to 1: 1.

At this time, the weight ratio of the first metal (B) precursor and the second metal (C) precursor may be 10: 1 to 1:10, the first metal (B) precursor and the second metal (C) precursor (B): the second metal (C) = 5: 1 to 1: 7, more preferably the first metal (B) 5 < / RTI >

If the content of the above-mentioned titanium (A) precursor, the first metal (B) precursor and the second metal (C) precursor is out of the range, the band gap energy of titanium can not be lowered. Or the reaction between titanium and the first metal can not be activated, resulting in problems such as decomposition of organic matter and deterioration of sterilizing power.

If the weight ratio of the second metal precursor to the first metal precursor is less than 0.1, the reaction between the first metal and the second metal may not be activated, so that the decomposition of the organic material and the sterilizing power of the catalyst may be decreased. If it exceeds, the side reaction which suppresses the reaction between titanium and the first metal is generated, so that decomposition of organic matter, disinfecting power and the like may be lowered.

The impregnated material impregnated with the first metal (B) precursor and the second metal (C) precursor in the titanium precursor may be dried at 110 ° C. for 6 hours or more, baked at 400 ° C. to 650 ° C. for 2 hours or more, The photocatalyst composition may be dried at 110 to 300 ° C for 6 to 12 hours and then calcined at 400 to 650 ° C for 2 to 10 hours.

If the drying temperature is too low or the drying time is too short, the photocatalyst composition may not be completely dried, and the photocatalyst composition may contain a solvent. Thus, when the drying temperature is too high or the drying time is too long, May result in degradation of the catalyst composition due to the presence of the catalyst.

When the calcination temperature for producing the photocatalyst composition is less than 400 ° C, the complex oxide particles and pores of the catalyst composition may be unevenly distributed or the composite metal oxide may not be formed.

The catalyst composition prepared as described above is dispersed in water or alcohol to be coated on a coating object such as a lighting device and used. In order to improve the adhesion, the activity of the photocatalyst composition and the side not inhibiting the sterilization, , It is preferable to use an inorganic binder containing SiO ₂ . Specific examples thereof include siloxane bonds (Si-O-Si) on the surface and a large number of hydroxyl groups (OH groups) on the surface thereof. The colloid is widely applicable to various fields due to its bonding properties, heat resistance, It is preferable to use phenylmethylsiloxane, methyltrimethoxysiloxane or the like as the colloidal silica.

In another aspect, the present invention provides a method of manufacturing a semiconductor device, comprising the steps of: (a) providing at least one selected from the group consisting of a titanium (A) precursor, beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr) Mixing a first metal (B) precursor and at least one second metal (C) precursor selected from the group consisting of lanthanum (La), cerium (Ce) and samarium (Sm) into a solvent; And (b) adding an acid to the mixture of step (a) and stirring the mixture.

More specifically, the process for preparing a photocatalytic composition according to the present invention comprises mixing a titanium (A) precursor, a first metal (B) precursor and a second metal (C) precursor in a solvent, Thereby preparing a sol-gel type photocatalytic composition.

At this time, the titanium (A) precursor may be a metal oxide precursor of titanium, preferably titanium alkoxide. The titanium alkoxide and the tin alkoxide are precursors capable of forming metal oxides because alkoxide such as ethoxide, butoxide, isopropoxide and the like is attached to the metal center atom.

The first metal (B) precursor may be at least one metal chloride selected from the group consisting of beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba) In the case of a compound containing beryllium, beryllium chloride, beryllium nitrate and beryllium hydroxide may be used. In the case of magnesium, magnesium chloride, magnesium nitrate and magnesium hydroxide may be used. In the case of calcium, calcium chloride, calcium nitrate and calcium hydroxide Strontium chloride, strontium nitrate and strontium hydroxide in the case of strontium, and barium chloride, barium nitrate and barium hydroxide in the case of barium.

The second metal (C) precursor is at least one metal chloride, metal nitride or metal hydroxide selected from the group consisting of lanthanum (La), cerium (Ce) and samarium (Sm) In the case of a compound containing lanthanum as the precursor, it may be lanthanum chloride, lanthanum nitrate and lanthanum hydroxide. In the case of cerium, it may be cerium chloride, cerium ammonium nitrate and cerium hydroxide. In the case of samarium, it may be samarium chloride and samarium hydroxide have.

The titanium (A) precursor, the first metal (B) precursor and the second metal (C) precursor are mixed in a solvent. The solvent may be any solvent capable of dispersing the metal precursors, and may be water or alcohol, and examples of the alcohol include ethanol, propanol, 2-propanol, and butanol.

The content of the solvent is not particularly limited as long as it can sufficiently dissolve and disperse the titanium (A) precursor, the first metal (B) precursor and the second metal (C) precursor, (A) precursor, the first metal (B) precursor and the second metal (C) precursor at a weight ratio of 100: 1 to 1: (C) the precursor can be sufficiently dissolved and dispersed.

The content ratio of the titanium (A) precursor, the first metal (B) precursor and the second metal (C) precursor is in the range of from 100: 1 to 1: : The titanium (A) precursor, the first metal (B) precursor and the second metal (C) precursor are mixed so that the weight ratio is 1: 1. In this case, the weight ratio of the first metal (B) precursor and the second metal (C) precursor is 10: 1 to 1:10.

If the content of the above-mentioned titanium (A) precursor, the first metal (B) precursor and the second metal (C) precursor is out of the range, the band gap energy of titanium can not be lowered. Or the reaction between titanium and the first metal can not be activated, resulting in problems such as decomposition of organic matter and deterioration of sterilizing power.

When the weight ratio of the second metal (C) precursor to the first metal (B) precursor is less than 0.1, the reaction between titanium and the first metal can not be activated, so that decomposition of organic materials, If the amount is more than 10 parts by weight, a side reaction that suppresses the reaction between titanium and the first metal is generated, so that decomposition of organic materials and sterilizing power may be lowered.

The titanium precursor, the first metal precursor and the second metal precursor added to the solvent are added with an acid to smoothly maintain the sol state, and the acid-added mixture is stirred to prepare a photocatalytic composition.

The content ratio of the acid to the titanium (A) precursor, the first metal (B) precursor and the second metal (C) precursor is selected from the group consisting of an acid: titanium (A) precursor, a first metal (B) precursor and a second metal = 10: 1 to 1: 1.

If the content ratio of the acid and the titanium precursor, the first and second metal precursors is out of the above range and the content of the acid is high, the pH becomes too low, and the formation of the acid sites on the oxide surface of the titanium is excessive, If the content of the acid is too low, there is almost no generation of acid sites on the titanium surface, so that the sol state can not be maintained smoothly. The acid may be nitric acid, hydrochloric acid, phosphoric acid, or a mixture thereof.

The stirring can be carried out by an apparatus and a method which are ordinarily practicable by those skilled in the art and is carried out by stirring the metal for at least 3 hours at preferably 60 to 60 rpm at 20 to 200 DEG C so that the metal is uniformly added onto the metal oxide .

The photocatalyst composition thus prepared may be further mixed with a binder in order not to interfere with the activity of the photocatalytic composition and the sterilization, antibacterial and deodorizing action in order to improve the adhesion, and an inorganic binder containing SiO ₂ is used . Specific examples thereof include siloxane bonds (Si-O-Si) on the surface and a large number of hydroxyl groups (OH groups) on the surface thereof. The colloid is widely applicable to various fields due to its bonding properties, heat resistance, It is preferable to use phenylmethylsiloxane, methyltrimethoxysiloxane or the like as the colloidal silica.

The solvent used for dissolving such components may be water or alcohol in consideration of the solubility of all components contained therein, and preferably water is preferably used. The solvent is used in an amount of 10 to 30% by weight. If it is less than 10% by weight, there is a problem in solubility. When the amount is more than 30% by weight, the solvent is excessively diluted, resulting in inadequate use of the photocatalyst composition.

The present invention relates to a lighting device characterized by containing a photocatalytic composition from another viewpoint.

The lighting device according to the present invention can contain the photocatalytic composition of the present invention in a lamp, a cover, a reflector, a refraction cover, etc. of a lighting device.

1, a lamp 100, such as a fluorescent lamp, is coated with a photocatalytic composition of the present invention. The lamp 100 has a transparent cylindrical glass tube 102, A phosphor 101 is coated on the inner circumferential surface of the glass tube 102 and a photocatalytic coating film 103 coated with a photocatalytic composition is coated on the outer circumferential surface of the glass tube 102. Power supply pins for connection to a power source are connected to both ends. When the phosphor 101 is not coated on the inner circumferential surface of the glass tube 102, the phosphor may be filled in the inner space of the glass tube 102.

When the illumination device is turned on, the photocatalytic film coated on the outer circumferential surface of the glass tube chemically reacts with the light (light) generated from the lamp to decompose the contaminants attached to the outer circumferential surface of the glass tube, and the volatile organic Compounds, odorous substances, bacteria and so on. That is, the air contaminated by the convection phenomenon is sterilized and deodorized as soon as it touches the outer circumferential surface of the glass tube 102, and is cleaned with ammonia, formaldehyde (toilet odor), acetaldehyde (stimulating odor such as tobacco, methyl mercaptan (Odor of rotten onion), acetic acid (sour odor), hydrogen sulfide (odor of rotten egg), and the like.

In another embodiment, the illumination device according to the present invention may be configured such that the photocatalytic composition of the present invention is applied to a glass fiber 110 as shown in FIG. 2 to surround the lamp 100, The photocatalyst coating composition 103 may be formed by coating the photocatalyst composition of the present invention on the reflector 120 as shown in FIG. 3A or may be applied to a diffuser 130, (FIG. 3B) in which the photocatalyst coating film 103 is formed by coating the photocatalyst coating film 103 with a photocatalyst.

Hereinafter, the present invention will be described more specifically by way of specific examples. The following examples are provided to aid understanding of the present invention, and the scope of the present invention is not limited thereto.

< Example  1>

10 g of beryllium chloride (first metal precursor) and 10 g of lanthanum chloride (second metal precursor) were mixed with 100 g of water, and the mixed mixture was impregnated with 100 g of titanium dioxide. Then, For 6 hours and further calcined at 400 ° C for 3 hours to prepare a photocatalyst composition.

< Example  2>

10 g of magnesium nitrate (first metal precursor) and 10 g of cerium ammonium nitrate (second metal precursor) were mixed with 100 g of water, and the mixed mixture was impregnated into 100 g of titanium dioxide. Then, Lt; 0 &gt; C for 6 hours and further calcined at 500 &lt; 0 &gt; C for 3 hours to prepare a photocatalyst composition.

< Example  3>

10 g of calcium hydroxide (first metal precursor) and 10 g of samarium hydroxide (second metal precursor) were mixed with 100 g of water, and the mixed mixture was impregnated into 100 g of titanium dioxide. Then, Dried for 6 hours and further calcined at 650 ° C for 2 hours to prepare a photocatalyst composition.

< Example  4>

100 g of titanium isopropoxide, 10 g of strontium chloride (first metal precursor) and 10 g of lanthanum chloride (second metal precursor) were mixed with 100 g of water and 10 g of isopropyl alcohol, and 5 g of nitric acid After stirring at 500 rpm for 5 hours at 150 ° C, the mixture was cooled to room temperature to prepare a photocatalyst composition.

< Example  5>

100 g of titanium isopropoxide, 10 g of barium nitrate (first metal precursor) and 10 g of cerium ammonium nitrate (second metal precursor) were mixed with 100 g of water and 10 g of ethanol, 5 g of hydrochloric acid was added to the mixture, The mixture was stirred at 40 ° C for 10 hours at 500 rpm, and then cooled to room temperature to prepare a photocatalyst composition.

< Example  6>

100 g of titanium isopropoxide, 5 g of beryllium hydroxide (first metal precursor), 5 g of magnesium hydroxide (first metal precursor), 5 g of lanthanum hydroxide (second metal precursor), 5 g of samarium hydroxide (second metal precursor) and 3 g of methyltrimethoxysilane were mixed with 100 g of water and 10 g of isopropyl alcohol. To the mixture was added 5 g of phosphoric acid, and the mixture was stirred at 200 rpm for 3 hours at 500 rpm and then cooled to room temperature to obtain a photocatalyst composition .

< Comparative Example  1>

After adding 100 g of titanium dioxide to 100 g of water, the additive was dried at 110 캜 for 6 hours and further calcined at 400 캜 for 3 hours to prepare a catalyst composition.

< Comparative Example  2>

100 g of titanium isopropoxide and 3 g of methyltrimethoxysilane were mixed with 100 g of water and 10 g of isopropyl alcohol and 5 g of nitric acid was added to the mixture, followed by stirring at 200 DEG C for 3 hours at 500 rpm And then cooled to room temperature to prepare a catalyst composition.

< Experimental Example  1>: Measurement of deodorizing performance

In order to measure the deodorization performance of the catalyst compositions prepared in Examples 1 to 6 and Comparative Examples 1 and 2, deodorization performance was measured in a fluorescent lamp. Trimethylamine, formaldehyde, acetaldehyde and toluene were measured with KS I 2218 : Measured after 30 minutes using a detector tube according to the 2009 standard, and the results are shown in Table 1.

In order to measure the deodorization performance with respect to the elapsed time, 50 ppm of formaldehyde was measured using a photocatalytic composition prepared in Example 1 using a detector tube according to the method of KS I 2218: 2009 in a fluorescent lamp, Is shown in Fig. 4 (b) is a measurement result of a control group in which the photocatalytic composition prepared in Example 1 is not used, and FIG. 4 (a) is a measurement result of the photocatalytic composition using the photocatalytic composition prepared in Example 1 .

< Experimental Example  2>: Measurement of sterilization performance

In order to measure the sterilizing performance of the catalyst compositions prepared in Examples 1 to 6 and Comparative Examples 1 and 2, sterilizing performance was measured in a dark room. Methods of measurement include MRSA ( Staphylococus aures subsp . Aureus ATCC 33591), Pseudomonas aeruginosa ATCC 15442), Escherichia coli ATCC 25922, Klebsiella pneumoniae ATCC 4352), Staphylococcus aureus ATCC 6538 and Salmonella typhimurium IFO 14193 were cultured for 10 seconds according to the KCL-FIR-1002: 2011 standard. The results are shown in Table 1 .

With reference to FIG. 5, Klebsiella pneumoniae ATCC 4352) was cultured for 10 seconds according to KCL-FIR-1002: 2011 standard, and then images (a) and (b) before applying the photocatalytic composition prepared in Example 1.

As shown in FIG. 5, the initial 1.4 × 10 ⁴ bacteria were reduced to 10 or less after 10 seconds, and 99.9% of the sterilization performance was confirmed.

division
Deodorization performance measurement Measurement of sterilization performance Removal rate (%) Removal rate (%) Formaldehyde Trimethylamine toluene Acetaldehyde MRSA P. aeruginosa Escherichia coli Staphylococcus aureus Pneumococcus Salmon
Nella Example 1 100 100 100 100 99.9 99.9 99.9 99.9 99.9 99.9 Example 2 100 100 100 100 99.9 99.9 99.9 99.9 99.9 99.9 Example 3 100 100 100 100 99.9 99.9 99.9 99.9 99.9 99.9 Example 4 100 100 100 100 99.9 99.9 99.9 99.9 99.9 99.9 Example 5 100 100 100 100 99.9 99.9 99.9 99.9 99.9 99.9 Example 6 100 100 100 100 99.9 99.9 99.9 99.9 99.9 99.9 Comparative Example 1 25.2 11.6 11.2 2.0 0.0 0.6 2.0 3.5 3.1 2.1 Comparative Example 2 15.0 12.0 13.9 3.7 0.0 0.8 3.4 4.8 3.6 3.3

As shown in Table 1 and FIG. 4, in the case of the photocatalytic compositions prepared in Examples 1 to 6, the deodorizing performance and the bacterium removal rate were remarkably higher than those of Comparative Examples 1 and 2.

Therefore, the photocatalytic composition according to the present invention is capable of removing harmful substances, deodorizing and sterilizing effects in a dark room such as a fluorescent lamp, an LED lighting device, and an OLED lighting device to which visible light is irradiated. And it can be applied to a living space such as a necessary lighting device.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: Lamp 101: Phosphor
102: glass tube 103: coating film
110: glass fiber 120: reflector
130: diffuser

Claims (18)

Titanium (A);
At least one first metal (B) selected from the group consisting of beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr) and barium (Ba); And
Wherein at least one second metal (C) selected from the group consisting of lanthanum (La), cerium (Ce) and samarium (Sm) is contained.
The method according to claim 1,
Wherein the titanium (A), the first metal (B) and the second metal (C) contain titanium (A): the first metal (B) and the second metal (C) in a ratio of 100: 1 to 1: Wherein the photocatalyst composition is a photocatalyst composition.
The method according to claim 1,
Wherein the first metal (B) and the second metal (C) comprise a first metal (B): a second metal (C) in a weight ratio of 10: 1 to 1:10.
(a) at least one first metal (B) precursor selected from the group consisting of beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), and barium (Ba) Mixing at least one second metal (C) precursor selected from the group consisting of cerium (Ce) and samarium (Sm) in a solvent;
(b) impregnating the mixture of step (a) with a titanium (A) precursor; And
(c) drying the impregnated material of the step (b) and then calcining the impregnated material.
5. The method of claim 4,
Wherein the first metal (B) precursor and the second metal (C) precursor are independently selected from the group consisting of metal chlorides, metal nitrides, and metal hydroxides.
5. The method of claim 4,
The precursor of the titanium (A) precursor, the precursor of the first metal (B) and the precursor of the second metal (C) in the step (b) Wherein the impregnation is carried out at a weight ratio of 100: 1 to 1: 1.
5. The method of claim 4,
In the step (a), the first metal (B) precursor and the second metal (C) precursor are mixed at a weight ratio of the first metal (B) precursor: the second metal (C) precursor = 10: 1 to 1:10 Wherein the photocatalyst composition is a photocatalyst composition.
5. The method of claim 4,
Wherein the step (c) is performed at a temperature of 110 ° C or more for 6 hours or more, and then calcined at 400 to 650 ° C for 2 hours or more.
5. The method of claim 4,
Wherein the solvent is at least one selected from the group consisting of water, ethanol, propanol, 2-propanol and butanol.
(a) at least one first metal (B) precursor selected from the group consisting of titanium (A) precursor, beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), and barium Mixing at least one second metal (C) precursor selected from the group consisting of lanthanum (La), cerium (Ce) and samarium (Sm) into a solvent; And
(b) adding an acid to the mixture of step (a) and stirring the mixture.
11. The method of claim 10,
In the step (a), the titanium (A) precursor, the first metal (B) precursor and the second metal (C) precursor are mixed with a titanium (A) precursor: a first metal (B) precursor and a second metal = 100: 1 to 1: 1 by weight based on the total weight of the photocatalyst composition.
11. The method of claim 10,
In the step (a), the first metal (B) precursor and the second metal (C) precursor are mixed at a weight ratio of the first metal (B) precursor: the second metal (C) precursor = 10: 1 to 1:10 Wherein the photocatalyst composition is a photocatalyst composition.
11. The method of claim 10,
Wherein the stirring in the step (b) is carried out by stirring at 20 to 200 ° C at 60 rpm or more for 3 hours or more.
11. The method of claim 10,
Wherein the acid is at least one selected from the group consisting of nitric acid, hydrochloric acid and phosphoric acid.
11. The method of claim 10,
In step (b), the acid and titanium precursor, the first metal (A) precursor and the second metal (B) precursor are selected from the group consisting of an acid: titanium (A) precursor, a first metal (B) precursor and a second metal (C) Is added in a weight ratio of 10: 1 to 1: 100.
11. The method of claim 10,
Wherein the solvent is at least one selected from the group consisting of water, ethanol, propanol, 2-propanol and butanol.
11. The method of claim 10,
Wherein the first metal (B) precursor and the second metal (C) precursor are independently selected from the group consisting of metal chlorides, metal nitrides, and metal hydroxides.
  A lighting device comprising the photocatalytic composition according to any one of claims 1 to 3.

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