KR102394150B1 - High performance photocatalytic sterilizatio module - Google Patents

Abstract

Provided is a high-functional photocatalytic sterilization module, wherein efficiency of photoreaction is increased by an efficient cross-sectional structure of a sterilization duct and a coating treatment of a high-functional photocatalytic coating composition, and emission efficiency of radicals obtained by photoreaction is increased and thus a sterilization effect of air containing various bacteria and viruses such as COVID-19 is maximized. A high-functional photocatalytic sterilization module according to a preferred embodiment of the present invention is used for air purification and decomposition and sterilization of organic substances, and comprises: a sterilization duct including side-by-side front and rear plates at regular intervals and a photocatalytic sterilization chamber which is connected to the front and rear plates, has a trapezoidal cross section by an inclined plate inclined at a predetermined angle, and is closed to the inside by the front and rear plates and the inclined plate, wherein all inner surfaces of the photocatalytic sterilization chamber are coated with photocatalytic materials and a ventilation inlet is formed at a lower part of the photocatalytic sterilization chamber; one or more photocatalytic channel holders disposed on an inner wall of the sterilization duct; a photocatalytic channel detachably coupled and fitted into the photocatalytic channel holder, having a tunnel-shaped photocatalytic reaction chamber and radially formed catalytic extension wings on an inner surface of the photocatalytic reaction chamber, and coated with a photocatalytic coating composition on inner and outer surfaces; and an ultraviolet rays lamp disposed inside the photocatalytic channel and irradiating the photocatalytic coating composition with ultraviolet rays to cause a photocatalytic reaction.

Description

High performance photocatalytic sterilization module

The present invention relates to a high-functional photocatalyst sterilization module used for air purification and sterilization. In particular, the efficient cross-sectional structure of the sterilization duct and the coating treatment of the high-functional photocatalyst coating composition increase the efficiency of the photoreaction, and the emission efficiency of radicals obtained from the photoreaction It relates to a high-function photocatalyst sterilization module that can maximize the sterilization effect of air containing various bacteria and viruses such as COVID-19 by rising.

Recently, research using a photocatalytic reaction for antibacterial, deodorizing, air and water purification has been actively conducted. Here, the photocatalyst is a type of semiconductor ceramic and uses light as an energy source to promote a catalytic reaction, that is, an oxidation/reduction reaction to decompose various bacteria and contaminants. A typical example is titanium dioxide (TiO ₂ ).

The photocatalytic properties of titanium dioxide are expressed from the excitation of electrons from the valence band to the conduction band by ultraviolet (UV) and near-ultraviolet (Near-UV) rays. That is, electrons are generated on the surface by ultraviolet (UV) and near-ultraviolet (Near-UV) rays irradiated to titanium dioxide, and holes are created at the place where the electrons are generated, and these electrons and holes have strong oxidizing and reducing power, respectively. OH radicals are generated by oxidizing moisture in the air, and these OH radicals have a stronger oxidizing power than hydrogen peroxide, chlorine, and ozone used for disinfection, so that molecular bonds of organic substances can be easily decomposed.

As such, titanium dioxide can easily remove volatile organic compounds, other harmful organic substances, air pollutants, acidic or alkaline odor substances, as well as bacteria that can cause sick house syndrome and old house syndrome with only light energy without consumption of large amounts of energy. there is. In addition, titanium dioxide has chemical stability that is not eroded by acids, bases, and organic solvents, and does not change itself even when exposed to light, so it can be used semi-permanently.

Therefore, titanium dioxide is applied to various fields such as home appliances, roads, vehicles, air treatment, medical treatment, water treatment, etc., including energy and environmental fields, and is actively used for the purpose of air purification and sterilization.

However, due to the reaction characteristic of causing a slow reaction by light, the reaction rate of deodorization and sterilization is much slower than that of general drugs, so there is a problem that the efficiency of the photocatalytic reaction is low. In addition, deodorization and sterilization methods using mechanical manufacturing methods such as discharge and adsorption to quickly perform deodorization and sterilization were difficult to apply due to economic burdens such as facility costs and maintenance costs.

Accordingly, Korean Patent Registration Nos. 10-0874130, 10-1173445, 10-1935360, and 10-2000522 disclose a photocatalytic composition containing titanium dioxide in order to maximize the efficiency of the photocatalytic reaction. . However, it is still difficult to expect a satisfactory photocatalytic reaction efficiency.

In addition, the prior technologies are only filtering and sterilizing fine dust and bacteria in the air using filters, photocatalysts, UV lamps, etc. -19) did not have any function or means to prevent the droplets (saliva) of an infected person from floating in the air and transmitted through the respiratory tract or the mucous membranes of the eyes, nose, and mouth.

Republic of Korea Patent Registration No. 10-0874130 Republic of Korea Patent Registration No. 10-1173445 Republic of Korea Patent Registration No. 10-1935360 Republic of Korea Patent Registration No. 10-2000522

The present invention improves the efficiency of the photoreaction by the efficient cross-sectional structure of the sterilization duct and the coating treatment of the high-functional photocatalyst coating composition, and the emission efficiency of radicals obtained by the photoreaction increases, so that air containing various bacteria and viruses such as COVID-19 The purpose is to provide a high-function photocatalyst sterilization module that maximizes the sterilization effect of

A high-function photocatalyst sterilization module according to a suitable embodiment of the present invention,

In the high-function photocatalytic sterilization module used for air purification and decomposition and sterilization of organic substances,

A photocatalytic sterilization chamber that has a trapezoidal cross section by a front plate and a rear plate that are parallel to each other at regular intervals and is connected to the front plate and the rear plate and is inclined at a predetermined angle, and is closed inside by these front and rear plates and the inclined plate a sterilization duct having a photocatalyst material coated on all inner surfaces of the photocatalyst sterilization chamber, including a sterilization duct having a blower inlet formed at a lower portion of the photocatalytic sterilization chamber;

at least one photocatalyst channel holder disposed on the inner wall of the sterilization duct;

a photocatalyst channel detachably fitted to the photocatalyst channel holder and having catalyst expansion wings radially formed on the inner surface of the tunnel-type photocatalytic reaction chamber and the photocatalytic reaction chamber and coated with a photocatalytic coating composition on the inner and outer surfaces;

and an ultraviolet lamp disposed inside the photocatalytic channel and irradiating ultraviolet light with the photocatalyst coating composition to cause a photocatalytic reaction.

In addition, the photocatalyst coating composition includes 10 to 30 parts by weight of an ultraviolet curable acrylic resin, 1 to 10 parts by weight of a silane coupling agent, and 0.1 to 5 parts by weight of a photoinitiator, based on 100 parts by weight of the photocatalyst sol, a titanium precursor, an acid catalyst , 100 parts by weight of a titanium dioxide photocatalyst prepared by mixing an alcoholic solvent and distilled water, 10 to 30 parts by weight of molybdenum disulfide nanowire, and 1 to 10 parts by weight of cerium aluminide, lupeol and an alkalizing agent in an alcohol-based dispersion solvent It is characterized in that it is prepared by mixing.

In addition, the photocatalytic sol is prepared by stirring and heating 100 parts by weight of a titanium precursor, 18 to 25 parts by weight of an acid catalyst, 25 to 35 parts by weight of an alcoholic solvent, and 250 to 350 parts by weight of distilled water to prepare a titanium dioxide photocatalyst; and

100 parts by weight of a titanium dioxide photocatalyst, 10 to 30 parts by weight of molybdenum disulfide nanowires, and 1 to 10 parts by weight of cerium aluminide, mixed with an alcoholic dispersion solvent containing lupeol and an alkalizing agent, the solid content is 5 to 30% by weight , adjusting the pH to be 4.0 to 7.0; characterized in that it is prepared including.

In addition, the molybdenum disulfide nanowire is supersaturated by sonication and stirring of a precursor solution of molybdenum disulfide at 70 to 90° C. for 30 minutes to 2 hours, followed by cooling to precipitate a powdery molybdenum disulfide intermediate material. to do; and heat-treating the intermediate material;

The cerium aluminide is at least one powder selected from sodium hydride (NaH) and lithium hydride (LiH), cerium chloride (CeCl ₃ ) powder and aluminum chloride (AlCl ₃ ) powder and 5 to 20: 1: 1 to 5 molar ratio mixing to form a mixed powder; generating a composite powder containing cerium aluminide by putting the mixed powder together with a ball into a reaction vessel, filling argon, helium or nitrogen gas, and then performing ball milling; and dispersing the resulting composite powder in distilled water, and then filtering to recover the cerium aluminide powder.

In addition, the LED strip installation rod having a circular cross section over a certain length on the outside of the photocatalyst channel and coated with titanium dioxide (TiO ₂ ) on the outer peripheral surface of the LED strip installation rod It consists of an LED strip that generates LED ultraviolet rays It is characterized in that one or more LED ultraviolet emitters disposed in the photocatalytic sterilization room are further installed.

In addition, by bending the steel plates on both swash plates and the front plate of the sterilization duct, the peaks having an angle of 60 degrees each have a certain width and are continuously connected to form a wrinkle form, so that the photocatalyst coating composition is coated to induce scattering and diffusion of ultraviolet rays. An inclined scattering plate and a photocatalyst front scattering plate are installed respectively, and for photocatalyst scattering and diffusion, the ridge of the photocatalyst inclined scattering plate is disposed in a direction perpendicular to that of the photocatalyst front scattering plate, and the longitudinal direction of the ridge of the photocatalyst front scattering plate is air It is characterized in that it is arranged to coincide with the blowing direction in order to minimize the resistance of the flow.

In addition, for internal cleaning and management of the sterilization duct, an opening for duct management is formed on the front plate of the sterilization duct, and the photocatalyst front scattering plate base on which the photocatalyst front scattering plate is mounted is detachably installed in the duct management opening. characterized in that

According to the high-function photocatalytic sterilization module of the present invention, the efficiency of light reflection is increased due to the trapezoidal cross-sectional structure of the sterilization duct, and the photocatalyst coating composition is coated on the inner surface of the sterilization duct and the entire inner and outer surfaces of the photocatalyst channel to prevent various bacteria and COVID-19 There is an effect that can maximize the sterilization effect of air containing viruses such as

The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention, so the present invention is limited to the matters described in the accompanying drawings It should not be construed as being limited.
1 is a perspective view of a high-function photocatalyst sterilization module according to an embodiment of the present invention, in which a photocatalyst front scattering plate base is separated;
2 is an exploded perspective view between the photocatalyst channel holder and the photocatalyst channel applied to FIG. 1;
3 is a front view of the high-function photocatalyst sterilization module shown in FIG. 1;
FIG. 4A is a state diagram of ultraviolet irradiation for generating a photocatalytic reaction that appears when the high-function photocatalytic sterilization module shown in FIG. 1 is viewed from above; FIG.
Figure 4b is a partially modified installation state diagram of the photocatalyst channel holder applied to the present invention.
5 is a perspective view in which a photocatalyst front scattering plate and a photocatalyst inclined scattering plate are additionally installed in the embodiment of FIG. 1;
6 is a plan view of the high-function photocatalytic sterilization module shown in the embodiment of FIG. 5;

Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the presented embodiments are illustrative for a clear understanding of the present invention, and the present invention is not limited thereto.

The high-functional photocatalytic sterilization module 20 according to this embodiment has a sterilization duct 210 as shown in FIGS. 1 to 5 and generates ultraviolet rays therein to generate hydroxyl radicals generated by a reaction between the photocatalytic coating compositions. OH-) (hereinafter referred to as 'radical') performs a function of decomposing and killing organic substances such as various bacteria and viruses such as COVID-19 contained in pollutants (or inhaled air) with the oxidizing power. For example, outside air may be sucked into the sterilization duct 210 by a blower (not shown) and injected.

The high-function photocatalytic sterilization module 20 is provided with a sterilization duct 210 that provides a blowing passage and a photocatalytic reaction chamber. The sterilization duct 210 is connected to the front plate 211 and the rear plate 212 and the front plate 211 and the rear plate 212 parallel to each other at regular intervals and is trapezoidal by the inclined plate 213 inclined at a predetermined angle. It has a cross-section and includes a photocatalytic sterilization chamber 214 closed inside by these front and rear plates 212 and 213, but all inner surfaces of the photocatalytic sterilization chamber 214 have decomposition performance of harmful gases. And a photocatalyst coating composition having excellent surface durability is coated, and a blower inlet 214a is formed in the lower portion of the photocatalyst sterilization chamber 214 . The photocatalyst coating composition will be described later.

Preferably, all inner surfaces of the sterilization duct 210 are coated with a photocatalytic coating composition to be described later in order to increase the photocatalytic reaction area. The sterilization duct 210 is made of a corrosion-resistant stainless steel plate in this embodiment, but is not limited to such a metal material. In addition, in the sterilization duct 210 , as shown in FIGS. 2 and 4 , a blower inlet 214a is formed in the lower center of the photocatalytic sterilization chamber 214 . Accordingly, the intake air introduced through the blower inlet 214a is discharged upward through the photocatalytic sterilization chamber 214 .

For internal cleaning and management of the sterilization duct 210, an opening 211a for duct management is formed on the front plate 211 of the sterilization duct 210 as shown in FIG. The plate base 232 is installed detachably. The photocatalyst front scattering plate 230 may be mounted on the inner surface of the photocatalyst front scattering plate base 232 as shown in FIG. 5 .

One or more photocatalyst channel holders 280 are installed on the inner wall of the sterilization duct 210 . As shown in FIG. 2 , the photocatalyst channel holder 280 is provided with channel coupling grooves 280a facing each other. The photocatalyst channel holder 280 may be installed with a holder support leg 282 as shown in FIG. 4B .

A photocatalyst channel 300 that is detachably fitted to the photocatalyst channel holder 280 is provided. The photocatalyst channel 300 has a tunnel-type photocatalytic reaction chamber 302 and catalyst expansion wings 304 radially formed on the inner surface of the photocatalytic reaction chamber 302, and a photocatalyst with excellent decomposition performance and surface durability of harmful gases on the inner and outer surfaces A coating composition is coated.

An ultraviolet lamp 310 is disposed inside the photocatalytic channel 300 . The ultraviolet lamp 310 causes a photocatalytic reaction by irradiating ultraviolet rays to the photocatalytic coating composition, and at the same time generates a sterilizing power in the airflow passing through the photocatalyst channel 300 .

On the other hand, as shown in Fig. 4a, the LED strip installation rod 241, which has a circular cross section over a certain length on the outside of the photocatalyst channel 300 and is coated with titanium dioxide (TiO ₂ ), on the outer peripheral surface of the LED strip installation rod 241 One or more LED ultraviolet emitters 240 arranged in a circular arrangement and made of LED strips 242 for generating LED ultraviolet rays and arranged in the photocatalytic sterilization chamber 214 may be further installed.

In addition, as shown in FIGS. 5 and 6 , the ridges 220a and 230a having an angle of 60 degrees each by bending the steel plates on both the inclined plates 213 and the front plate 211 of the sterilization duct 210 have a certain width and continuously A photocatalyst inclined scattering plate 220 and a photocatalyst front scattering plate 230 are installed respectively to form a wrinkle shape and are coated with a photocatalyst coating composition to induce scattering and diffusion of ultraviolet rays. The mountain shape 220a of 220 is disposed in a direction perpendicular to the mountain shape 230a of the photocatalytic front scattering plate 230 and the longitudinal direction of the mountain shape 230a of the photocatalytic front scattering plate 230 minimizes the resistance of air flow. It can be arranged to coincide with the blowing direction (X) in order to do so.

Here, the photocatalyst coating composition includes 10 to 30 parts by weight of an ultraviolet curable acrylic resin, 1 to 10 parts by weight of a silane coupling agent, and 0.1 to 5 parts by weight of a photoinitiator, based on 100 parts by weight of the photocatalyst sol, a titanium precursor, an acid catalyst , 100 parts by weight of a titanium dioxide photocatalyst prepared by mixing an alcoholic solvent and distilled water, 10 to 30 parts by weight of molybdenum disulfide nanowires, and 1 to 10 parts by weight of cerium aluminide, lupeol and an alkalizing agent.

The photocatalyst sol is prepared by stirring and heating 100 parts by weight of a titanium precursor, 18 to 25 parts by weight of an acid catalyst, 25 to 35 parts by weight of an alcoholic solvent, and 250 to 350 parts by weight of distilled water to prepare a titanium dioxide photocatalyst; And 100 parts by weight of titanium dioxide photocatalyst, 10 to 30 parts by weight of molybdenum disulfide nanowire, and 1 to 10 parts by weight of cerium aluminide, mixed with an alcoholic dispersion solvent containing lupeol and an alkalizing agent, the solid content is 5 to 30% by weight and adjusting the pH to be 4.0 to 7.0; may be prepared including.

In addition, molybdenum disulfide nanowires are supersaturated by sonication and stirring of a precursor solution of molybdenum disulfide at 70 to 90 ° C. for 30 minutes to 2 hours, followed by cooling to precipitate a powdery molybdenum disulfide intermediate material. step; and heat-treating the intermediate material; The cerium aluminide is at least one powder selected from sodium hydride (NaH) and lithium hydride (LiH), cerium chloride (CeCl ₃ ) powder and aluminum chloride (AlCl ₃ ) powder and 5 to 20: 1: 1 to 5 molar ratio mixing to form a mixed powder; generating a composite powder containing cerium aluminide by putting the mixed powder together with a ball into a reaction vessel, filling argon, helium or nitrogen gas, and then performing ball milling; And after dispersing the resulting composite powder in distilled water, it may be prepared by a method comprising the step of recovering the cerium aluminide powder by filtration.

<Production Example 1>

Preparation of photocatalytic sol

TiCl ₄ and Ti(OCH ₂ CH ₃ ) ₄ 100 parts by weight of a titanium precursor mixed in a 2: 1 weight ratio, 22 parts by weight of a nitric acid catalyst, 30 parts by weight of ethanol and 280 parts by weight of distilled water were stirred at a temperature of 100° C. for 14 hours. and heating to prepare a titanium dioxide photocatalyst having a crystalline phase of an anatase type and a solid content of 17% by weight.

100 parts by weight of the titanium dioxide photocatalyst prepared above, 13 parts by weight of molybdenum disulfide nanowire and 5 parts by weight of cerium aluminide, lupeol and an alkalizing agent (diisopropylethylamine and sodium hydroxide are mixed in a 1: 0.2 weight ratio) was mixed with ethanol to have a solid content of 19 wt%, and the pH was adjusted to 6.5 to prepare a photocatalyst sol (Sol).

At this time, the molybdenum disulfide nanowire (NH ₄ ) ₂ MoS ₄ precursor solution of molybdenum disulfide in which 0.2 g of the precursor is mixed with 50 ml of a tertiary polar or non-polar solvent is ultrasonicated at 80 ° C. for 1 hour and stirred (sonication) and stirring ( stirring) to supersaturate, cool to precipitate an intermediate molybdenum disulfide in powder form; After performing the first heat treatment at 500 °C while injecting the intermediate material with Ar, H ₂ , and H ₂ S at 100, 7, and 5 sccm, respectively; Ar and H ₂ S was injected at 100 and 8 sccm, respectively, and was formed by a manufacturing method including performing secondary heat treatment at 1200 ° C., and an average length of 42 nm was used.

In addition, the cerium aluminide is obtained by mixing lithium hydride (LiH) powder with cerium chloride (CeCl ₃ ) powder and aluminum chloride (AlCl ₃ ) powder in a molar ratio of 18: 1: 3 to form a mixed powder; The mixed powder was charged together with 17 9.5 mm diameter balls made of chrome steel in a 125 ml container made of tool steel in a weight ratio of about 1:28, and then filled with argon (Ar) in the container, Composite powder containing cerium aluminide was produced by performing high energy ball milling for 4 hours using a mill. after; The resulting composite powder was dispersed in distilled water to remove salt by-products such as sodium chloride, and then filtered to recover cerium aluminide (CeAl ₄ ) powder having an average particle diameter of about 345 nm.

In addition, the lupeol is dried and then pulverized lupine seeds and pods of lupine seeds to obtain lupine seed powder and pod powders of lupine seeds; And 95% or more of ethanol as an extraction solvent to the lupine seed powder and the pod powder of the lupine seed was added in a weight ratio of 1: 7 and heated to 65° C. to extract the lupeol was used. At this time, the lupeol was mixed to be contained in an amount of 7 parts by weight in 100 parts by weight of ethanol.

<Comparative Preparation Example 1>

Preparation of comparative photocatalytic sol

Ti(OCH ₂ CH ₃ ) ₄ 100 parts by weight of a titanium precursor, 15 parts by weight of a nitric acid catalyst, 30 parts by weight of ethanol, and 280 parts by weight of distilled water were stirred and heated at a temperature of 90° C. for 11 hours, so that the crystal phase is anatase type and the solid content is 12 A weight % titanium dioxide photocatalyst was prepared.

100 parts by weight of the titanium dioxide photocatalyst prepared above was mixed with ethanol containing an alkalizing agent (sodium hydroxide), the solid content was 9% by weight, and the pH was adjusted to 6.5, thereby preparing a photocatalyst sol (Sol).

<Example 1>

Preparation of photocatalyst coating composition for sterilization device using LED lamp ultraviolet rays

With respect to 100 parts by weight of the photocatalytic sol prepared in Preparation Example 1; 20 parts by weight of UV-curable acrylic resin; 3 parts by weight of a silane coupling agent obtained by mixing vinyltrichlorosilane and 3-(2-aminoethylaminopropyl)dimethoxymethylsilane in a 1: 1 weight ratio; And 0.8 parts by weight of a photoinitiator (2-hydroxy 2-methyl-1-phenylpropan-1-one) was mixed to prepare a photocatalyst coating composition for a sterilizer using LED lamp ultraviolet rays.

In this case, the ultraviolet curable acrylic resin is isobornyl (meth)acrylate 19% by weight, tetrahydrofurfuryl acrylate 26% by weight, tripropylene glycol diacrylate 31% by weight, 1,6-hexanediol diacrylate 9% by weight % and 15 wt% of pentaerythritol triacrylate was used.

<Comparative Example 1>

Preparation of Comparative Coating Compositions

With respect to 100 parts by weight of the photocatalytic sol prepared in Comparative Preparation Example 1; 20 parts by weight of UV-curable acrylic resin; 3 parts by weight of 3-(2-aminoethylaminopropyl)dimethoxymethylsilane; And 0.8 parts by weight of a photoinitiator (2-hydroxy 2-methyl-1-phenylpropan-1-one) was mixed to prepare a photocatalyst coating composition for a sterilizer using LED lamp ultraviolet rays.

In this case, the UV-curable acrylic resin was used containing 65 wt% of isobornyl (meth)acrylate and 35 wt% of tripropylene glycol diacrylate.

<Test Example>

5, the photocatalytic coating composition for a sterilizer using the LED lamp ultraviolet light prepared in Example 1 and the comparative coating composition prepared in Comparative Example 1 are sprayed on a scattering plate made of stainless steel with a curved surface as shown in FIG. 5, respectively. By coating, irradiating with UV (300 to 2,000 mJ) and curing, a scattering plate having a photocatalyst coating composition coated on the surface was prepared.

Harmful gas decomposition performance

The harmful gas decomposition performance was evaluated for the scattering plates each coated with the photocatalyst coating composition for a sterilizer using the LED lamp ultraviolet light prepared in Example 1 and the comparative coating composition prepared in Comparative Example 1. The results are shown in Table 1 below.

The evaluation was measured by a small chamber test method (ISO 18560-1:2014), the injection gas concentration was 0.1 ppm, and the light source used was an LED lamp emitting ultraviolet rays of 200 to 400 nm wavelength.

Coating surface durability evaluation

For the scattering plates each coated with the photocatalyst coating composition for a sterilization device using the LED lamp ultraviolet light prepared in Example 1 and the comparative coating composition prepared in Comparative Example 1, a cellophane tape having a width of 5 cm and a length of 15 cm was adhered to the surface. Then, the mass of the composition to be peeled off was measured. At this time, when the mass of the peeled composition is 3% by weight or less relative to the mass of the initially coated composition, it is good, and when it exceeds 3% by weight, it is insufficient, and the results are shown in Table 1 below.

Degree of decomposition of harmful gases surface durability Example 1 99% Good Comparative Example 1 77% Inadequate

As can be seen in Table 1, when the photocatalyst coating composition for a sterilizer using the LED lamp ultraviolet light prepared in Example 1 was coated, compared with the case in which the comparative coating composition prepared in Comparative Example 1 was coated, It was confirmed that it has an exceptionally excellent decomposition performance of harmful gases and surface durability.

Unexplained code '217' is a 'blower mounting part'.

The operation of the high-function photocatalytic sterilization module configured as described above will be described.

First, in the high-function photocatalytic sterilization module 20 , a photocatalytic reaction occurs in the photocatalytic coating composition inside the photocatalyst channel 300 by UV irradiation of the UV lamp 310 . At this time, when the blowing force is generated through the blowing inlet 214a, the blowing flow is generated inside the sterilization duct 210. At this time, external air (contaminants, bacteria, viruses, etc.) is sucked through the blower inlet 214a.

In addition, ultraviolet rays generated from the LED strip 242 of the LED ultraviolet emitter 240 are radiated and collide with the inner surface of the sterilization duct 210, so that electrons are formed from the coated titanium dioxide to generate strong oxidizing power, and hydroxyl radicals (-OH) and superoxide (-O2) are formed. In this process, more radicals (OH-) are generated due to the increase in the area of the photochemical reaction by the titanium dioxide coated on the inner surface of the sterilization duct 210, the photocatalyst inclined scattering plate 220 and the photocatalyst front scattering plate 230. . Therefore, oxidation, decomposition, and death of organic compounds such as pollutants, bacteria and viruses included in the outdoor air introduced into the sterilization duct 210 are promoted by the increased sterilization power.

In addition, since the LED ultraviolet emitter 240 has a small diameter and a long shape, it occupies a relatively small cross-section and volume in the sterilization duct 210 . As a result, the resistance of the blowing flow in the sterilization duct 210 is reduced, and thus the sterilization efficiency is improved.

In addition, there is an effect of maximizing the sterilization effect of air containing various bacteria and viruses such as COVID-19 by using the ultraviolet light of the LED lamp having a wavelength of 200 to 400 nm, which is a wavelength band with strong bacterial sterilization power.

In addition, in the present invention, the photocatalyst coating composition has an effect of being easily coated with excellent adhesion. Accordingly, even when the member to be coated has a curved surface, the photocatalytic coating composition of the present invention can be conveniently coated with excellent adhesion, thereby further maximizing the efficiency of the photocatalytic reaction.

So far, the present invention has been described in detail with reference to the presented embodiment, but those skilled in the art can make various modifications and variations of the invention without departing from the technical spirit of the present invention with reference to the presented embodiment. will be. The present invention is not limited by such variations and modifications, but only by the claims appended hereto.

20: high-function photocatalyst sterilization module
210: sterilization duct
220: photocatalyst inclined scattering plate
230: photocatalyst front scattering plate
240: LED ultraviolet emitter
241: LED strip installation rod
242: LED strip
280: photocatalyst channel holder
300: photocatalyst channel

Claims (7)

In the high-function photocatalytic sterilization module 20 used for air purification and decomposition and sterilization of organic substances,
It has a trapezoidal cross-section by the front plate 211 and the rear plate 212 and the front plate 211 and the rear plate 212 which are parallel to each other at a regular interval and inclined at a predetermined angle by the inclined plate 213, and these front surfaces A photocatalytic coating composition is coated on all inner surfaces of the photocatalyst sterilization chamber 214, including the photocatalyst sterilization chamber 214 closed inside by the plate 211, the rear plate 212, and the inclined plate 213, and the photocatalytic sterilization a sterilization duct 210 having a blower inlet 214a formed as a lower portion of the seal 214;
at least one photocatalyst channel holder 280 disposed on the inner wall of the sterilization duct 210;
It is detachably fitted to the photocatalyst channel holder 280 and has a photocatalyst reaction chamber 302 of a tunnel type and catalyst expansion wings 304 radially formed on the inner surface of the photocatalytic reaction chamber 302, and photocatalysts on the inner and outer surfaces a photocatalytic channel 300 coated with a coating composition;
A high-function photocatalyst sterilization module comprising a; disposed inside the photocatalyst channel 300 and generating a photocatalytic reaction by irradiating ultraviolet rays with the photocatalyst coating composition. The method of claim 1,
The photocatalyst coating composition includes 10 to 30 parts by weight of an ultraviolet curable acrylic resin, 1 to 10 parts by weight of a silane coupling agent, and 0.1 to 5 parts by weight of a photoinitiator, based on 100 parts by weight of the photocatalyst sol, a titanium precursor, an acid catalyst, alcohol 100 parts by weight of a titanium dioxide photocatalyst prepared by mixing a solvent and distilled water, 10 to 30 parts by weight of molybdenum disulfide nanowire, and 1 to 10 parts by weight of cerium aluminide, lupeol and an alkalizing agent by mixing in an alcohol-based dispersion solvent A high-function photocatalytic sterilization module, characterized in that manufactured. 3. The method of claim 2,
The photocatalytic sol is
preparing a titanium dioxide photocatalyst by stirring and heating 100 parts by weight of a titanium precursor, 18 to 25 parts by weight of an acid catalyst, 25 to 35 parts by weight of an alcoholic solvent, and 250 to 350 parts by weight of distilled water; and
100 parts by weight of a titanium dioxide photocatalyst, 10 to 30 parts by weight of molybdenum disulfide nanowire, and 1 to 10 parts by weight of cerium aluminide, mixed with an alcoholic dispersion solvent containing lupeol and an alkalizing agent, the solid content is 5 to 30% by weight , adjusting the pH to be 4.0 to 7.0; A high-function photocatalyst sterilization module, characterized in that it is manufactured including 3. The method of claim 2,
The molybdenum disulfide nanowire is
The precursor solution of molybdenum disulfide is supersaturated by sonication and stirring at 70 to 90° C. for 30 minutes to 2 hours, followed by cooling to precipitate an intermediate molybdenum disulfide in powder form; and heat-treating the intermediate material;
The cerium aluminide is
At least one powder selected from sodium hydride (NaH) and lithium hydride (LiH) is mixed with cerium chloride (CeCl ₃ ) powder and aluminum chloride (AlCl ₃ ) powder in a molar ratio of 5 to 20: 1: 1 to 5 and mixed powder forming a; generating a composite powder containing cerium aluminide by putting the mixed powder together with a ball into a reaction vessel, filling argon, helium or nitrogen gas, and then performing ball milling; and dispersing the resulting composite powder in distilled water and then filtering to recover the cerium aluminide powder. The method of claim 1,
LED strip installation rod 241 having a circular cross section over a certain length on the outside of the photocatalyst channel 300 and coated with titanium dioxide (TiO ₂ ) on the outer circumferential surface of the LED strip installation rod 241, LED ultraviolet rays A high-function photocatalyst sterilization module, characterized in that one or more LED ultraviolet emitters (240) are further installed in the photocatalytic sterilization chamber (214) made of an LED strip (242) for generating a. The method of claim 1,
On both sides of the inclined plates 213 and the front plate 211 of the sterilization duct 210, the ridges 220a and 230a each having an angle of 60 degrees by bending the steel plate have a certain width and are continuously connected to form a wrinkled photocatalyst coating composition A photocatalyst inclined scattering plate 220 and a photocatalyst front scattering plate 230 that are coated to induce scattering and diffusion of ultraviolet rays are installed, respectively, for photocatalyst scattering and diffusion. is disposed in a direction perpendicular to the ridge 230a of the photocatalyst front scattering plate 230 and the longitudinal direction of the ridge 230a of the photocatalyst front scattering plate 230 in the blowing direction (X) and A high-function photocatalyst sterilization module, characterized in that it is arranged to match. delete

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