JP2007061807A - Device for activating photocatalyst and method for activating photocatalyst using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for evenly activating a photocatalyst carried in a powdery, granular, rod-like or fibrous three-dimensional object or the like, or on its surface; and a method for activating the photocatalyst using it. <P>SOLUTION: The device for activating the photocatalyst comprises (A) a shaker, (B) a shaking container for shaking an object to be activated having a curved surface mounted on the shaker, (C) an object to be activated containing container constituted of a material for permeating excitation light required activating photocatalytic action and having a rotatable shape for inserting the object to be activated including a compound having the photocatalytic action as one component of a structure material, and (D) a light irradiation body mounted on the top of the shaker and irradiating the object to be activated with the excitation light. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a photocatalyst activation device and a photocatalyst activation method using the same. More specifically, the present invention relates to a photocatalyst activation device supported on the surface of a three-dimensional object such as powder, granule, rod or fiber, and a photocatalyst activation method using the same.

A photocatalyst is a substance that catalyzes the reaction of a chemical substance that absorbs light in a phenomenon and does not absorb light by its energy. For example, the adsorption of oxygen occurring on a solid oxide semiconductor (TiO ₂ , ZnO, etc.) Desorption, N ₂ O decomposition, oxygen isotope exchange, CO oxidation, butene isomerization, and the like. Utilizing such properties, photocatalysts are currently used for various things, and a purification action is expected.

  However, in order to fully exhibit the photocatalytic action, it is essential that the photocatalyst itself is irradiated with light, but for three-dimensional objects such as powder, granules, rods, or fibers, from one direction. There is a problem that sufficient catalytic action cannot be exhibited by light irradiation.

This problem is the same in the evaluation method for products containing these photocatalytic compounds as one component of the constituent material. That is, for the evaluation of the photocatalytic action carried on a planar object having a photocatalyst on the surface, as shown in Non-Patent Document 1, it is only necessary to irradiate the object to be evaluated from one direction. When the organic substance contained in the solution comes into contact with the surface of the evaluation object, the organic substance is decomposed into carbon dioxide and water. When bacterial cells suspended in a solution come into contact with the surface, the former can be killed, so that the former can evaluate the antifouling effect due to photocatalysis and the latter can evaluate the antibacterial effect due to photocatalysis. .
Photocatalyst product technology council rules and regulations, test methods, photocatalytic activity evaluation test table I, (June 2005) photocatalyst product technology council issued pages 48-49

However, in such a method, light irradiation is not uniformly applied to a three-dimensional evaluation object such as powder, granule, rod, or fiber, so that the photocatalyst supported on the surface is sufficiently active. It is difficult to accurately evaluate the action. In order to avoid such inconvenience, a method of increasing the number of light sources, or using a mirror or the like as shown in Non-Patent Document 2 to reflect light emitted from one light source and irradiate the surface of the evaluation object, etc. However, none of these methods uniformly irradiate light onto the surface of the object to be evaluated, which is insufficient from the viewpoint of accurate evaluation of the photocatalytic action.
Industrial Materials Vol.49, No.7 (2001), published by Nikkan Kogyo Shimbun, pages 60-64

  An object of the present invention is to provide a device for uniformly activating a photocatalyst supported on or on a three-dimensional object such as powder, granule, rod or fiber, and a method for activating a photocatalyst using the device. There is.

  The objects of the present invention are: (A) a shaker, (B) a shake vessel having a curved surface installed on the shaker, and (C) a photocatalytic action for shaking an activation target. An activation object having a rotatable shape made of a material that transmits excitation light required for activation of photocatalysis for inserting an activation object containing a compound having a component as a component A photocatalyst activation device comprising a storage container and (D) a light irradiator for irradiating an activation target with excitation light, and a photocatalytic activation target using the photocatalyst activation device. After the object is stored in the activation object storage container, the storage container is set in a shaking container on a shaker, and the storage container is rotated by shaking the shaker. The excitation light is illuminated from at least one direction with respect to the storage container. Is achieved by the method for activating the photocatalyst is carried out.

  Moreover, the photocatalytic activity evaluation object is used as a photocatalytic activity evaluation apparatus by using a photocatalytic activity evaluation object as an activation object and introducing a photocatalysis activity evaluation solution into the storage container together with the photocatalysis activity evaluation object. . That is, after the photocatalyst evaluation target object is stored in the storage container together with the photocatalyst evaluation solution, the storage container is set in a shaking container on a shaker, and the storage container is rotated by shaking the shaker. In this state, the photocatalytic action can be evaluated by irradiating the storage container with the excitation light from at least one direction with the photoirradiator and measuring the change in the photocatalytic action evaluation solution.

  When the photocatalyst activation device according to the present invention is used, it is possible to uniformly activate the photocatalyst contained in a three-dimensional object such as powder, granule, rod or fiber, and these photocatalysts The present invention can also be effectively applied to a method for evaluating the photocatalytic action of a product containing a compound having an action as a component of a constituent material.

  In the present specification, the “photocatalyst” refers to a compound that is excited by absorption of light to become an activated state and exerts a strong oxidation / reduction action on an organic substance or the like that contacts the surface of the photocatalyst. "Means such oxidation / reduction action, and" compound having photocatalytic action "means a compound having such" photocatalytic action ".

(A) Shaking machine As the shaking machine, a repetitive vibration type shaking machine in which the shaking container repeatedly moves back and forth, a rotary vibration type shaking machine in which the shaking container rotates and the like are used. It is properly used depending on the shape. That is, when the storage container is cylindrical, a repetitive vibration type shaker is used, and when the storage container is spherical, both of these are used. With respect to these shaking speeds, a speed that does not cause the storage container to pop out is selected when the storage container is not destroyed and an upper-opening type shake container is used.

(B) Shaking container The shaking container is attached to the shaking plate on the shaker to repeatedly move the storage container containing the activation (evaluation) object, and the storage container can be repeatedly moved. The shape is not particularly limited as long as it has a curved surface. For example, a curved surface type container, a cylindrical type container, a hemispherical type container, a spherical type container or the like having a size that allows the storage container to move repeatedly is used.

  As a material used for the shaking container, a material that does not have an opening in the upper part of the shaking container needs to be made of a material that allows at least the upper part to transmit excitation light. On the other hand, for any shape, preferably, at least the lower part of the container can be made of a material that reflects the excitation light, and this effectively irradiates the object to be activated (evaluated) with the excitation light irradiated. can do. In this case, the excitation light may be reflected by the constituent material of the container or by the material coated on the inner wall. In any case, the surface is preferably a mirror surface.

(C) As the storage container, a storage container whose shape can be rotated on a shaker, preferably a spherical shape, a cylindrical shape, etc., is used, and the material thereof is light having a wavelength necessary for the expression of photocatalysis. For example, quartz is used in the ultraviolet region, and glass is used in addition to quartz in the ultraviolet region close to visible light to the visible light region. When glass is used, for example, glass tubes of various sizes can be used, and glass capillaries for blood collection can also be used. Furthermore, the container which uses plastics, such as a polystyrene, as a constituent material may be sufficient. The size of the container is not particularly limited, but the size and size of the activation (evaluation) object containing the size of the shaker and the photocatalytic compound as a component of the constituent material, the stirring efficiency of the evaluation liquid, etc. It chooses suitably in consideration.

  Examples of the activation (evaluation) object containing a compound having a photocatalytic action as one component of the constituent material include objects whose shape is powder, granular, rod-like, or fiber-like. As the compound having a photocatalytic action, it is preferable to use a metal oxide which has a photocatalytic action and is a non-organic compound, and such a metal oxide is not particularly limited, and examples thereof include titanium oxide, titanium dioxide, Examples thereof include zinc oxide, silver-based titanium oxide, tungsten trioxide, ferric oxide, dibismuth trioxide, tin oxide, and preferably titanium oxide is used. Further, salts generated from titanium dioxide and other metal oxides such as strontium titanate and barium titanate are also used as metal oxides.

(D) Light irradiator As the light irradiator, one capable of irradiating light having a wavelength capable of activating the target photocatalyst in at least one direction, preferably from the upper part of the shaker is used. That is, since the light source changes depending on the type of photocatalyst, the wavelength is appropriately selected. The most commonly used photocatalyst excitation light source is a black light fluorescent lamp (wavelength: 310 to 400 nm). For example, the light intensity is 1 mW / cm ² and irradiation is performed at 20 to 25 ° C. Done.

  Examples of light include ultraviolet light and / or visible light, and their incidence causes photocatalysis on a photocatalytic compound, thereby sterilizing and degrading viruses with capsids and envelopes made of proteins, and on the surface. Self-cleaning action such as decomposition of attached dirt can be obtained.

  Using the photocatalyst activation device having the above configuration, after storing the photocatalyst activation target in the activation target storage container, set the storage container in the shaker on the shaker, and shake the shaker. Thus, the photocatalyst can be activated by irradiating the storage container with excitation light from at least one direction with the light irradiator while the storage container is rotated.

Photocatalyst evaluation apparatus In the photocatalyst activation apparatus having the above configuration, by using a photocatalytic evaluation target object as an activation target, and introducing a photocatalytic evaluation solution together with the photocatalytic evaluation target into the storage container, The photocatalytic activation device is used as a photocatalytic activity evaluation device. That is, after the photocatalyst evaluation target object is stored in the storage container together with the photocatalyst evaluation solution, the storage container is set in a shaking container on a shaker, and the storage container is rotated by shaking the shaker. In this state, the photocatalytic action can be evaluated by irradiating the storage container with the excitation light from at least one direction with the photoirradiator and measuring the change in the photocatalytic action evaluation solution.

  As the photocatalytic action, an antibacterial action or a self-cleaning action of an object containing a compound having a photocatalytic action is known. Therefore, in the said evaluation apparatus, the solution for evaluating an antibacterial action or the solution for evaluating a self-cleaning action is used as a solution for photocatalytic action evaluation. Examples of the evaluation solution for evaluating the antibacterial action include a solution in which E. coli K-12 strains such as E. coli MG1665 and E. coli IFO3301 are suspended after culturing. The antibacterial effect can be evaluated by measuring the amount of decrease in the number of cells. Moreover, as an evaluation solution for evaluating the self-cleaning action, for example, a methylene blue aqueous solution (concentration: 10 mg / L) can be mentioned, and the self-cleaning action can be evaluated by measuring the degree of decoloration accompanying light irradiation for 1 hour.

  As the photocatalytic activity evaluation solution, a solution having a high viscosity is preferably used. The use of an evaluation solution having a high viscosity is an effective means for preventing separation of the photocatalyst due to friction, for example, when evaluating a granular evaluation object or a rod-shaped evaluation object. In the case of a rod-shaped evaluation object, it can be fixed to the lid of the cylindrical container to be used so as to prevent contact with the inner wall of the cylinder. In this case, as the lid of the container, a sealing material such as clay or a material in which the sealing material is attached to the inside of a cap-type lid is used.

  Hereinafter, the photocatalytic activity evaluation apparatus will be described in detail with reference to the drawings.

  1 to 3 show an example of setting an evaluation object and an evaluation solution in a storage container. The evaluation object is rod-shaped in FIG. 1, granular in FIG. 2, and fibrous in FIG. Show the case. Each figure a shows a state before the evaluation objects 1 to 3 are inserted into the cylinder 17 plugged at the lower end with the lid 18, and each figure b shows the evaluation objects 1 to 3 inserted into the cylinder 17. Thereafter, the evaluation solution 16 is introduced to a height of about 2/3 of the cylinder 17. The cylinder 17 used here is preferably made of a material such as glass or hard plastic that transmits excitation light capable of activating the photocatalyst and hardly damages the outer wall. By using these, irregular reflection of light due to scratches on the outer wall can be prevented, and excitation light can be efficiently transmitted to the inside. Further, the amount of the evaluation solution is not particularly limited, and may be a liquid amount capable of accurately evaluating the photocatalytic action, for example, 1/5 or more of the cylindrical storage container volume. Furthermore, the viscosity of the solution for evaluation is not particularly limited, but if it is necessary to prevent the photocatalyst from peeling off, a solution prepared to increase the viscosity may be used.

  Each figure c shows a state in which the upper end of the cylinder 17 is plugged with a lid 18 similar to the lower end, and each figure d shows a completed form of the cylindrical storage container 4 containing the evaluation object and the evaluation solution. Yes. Here, depending on the form of the evaluation object, the evaluation object can be fixed by the lid 18, thereby preventing contact between the photocatalyst carried on the surface of the evaluation object and the inner wall of the cylindrical storage container. Therefore, it is possible to prevent the photocatalyst from being detached due to friction.

  In addition, in the aspect of FIG. 2, it is possible to apply not only to the granular evaluation object 2 but also to an evaluation object in a powder or suspension state.

  4-5 has shown the other example of the set of the evaluation object to the storage container, and the solution for evaluation, and unlike FIGS. 1-3, the storage container is spherical. The evaluation object is granular in FIG. 4 and is fibrous in FIG. Each figure a shows a state in which the evaluation objects 2 to 3 are inserted into the hollow hemispherical storage container lower part 20 and the storage container upper part 19 having the same shape and having an evaluation liquid inlet is fitted. The fitting of the hollow hemispherical upper part to the lower part may be a screw type or an indentation type, and it is preferable to prevent liquid leakage by using, for example, packing. Each figure b shows a state in which the evaluation solution 16 is introduced into the spherical container 5 from the evaluation solution inlet 21, and each figure c prevents the inclusions from leaking out even when rotating. Further, FIG. D shows an example of the completed spherical storage container 5 in which the lid 18 is set. The material for the upper and lower parts of the hollow hemisphere is the same material as the cylinder used in FIGS. 1 to 3, and the amount and viscosity of the evaluation solution are as described in FIGS.

  FIG. 6 shows an example of a photocatalyst activation device including a cylindrical storage container, a curved surface-shaped shaking container, and a repetitive shaking machine. The shaking table 12 provided on the upper part of the reciprocating shaker 10 that shakes back and forth 30 to 200 times per minute is provided with fixtures 23 and 23 for fixing the shaking container, A curved surface type shaking container 6 is installed between the fixtures. The curved surface type shaking container 6 includes a slope 25 and a guide 24 for rotating the cylindrical storage container 4 illustrated in FIGS. The guide 24 can be removed and used when the cylindrical storage container 4 illustrated in the figure is used, but when a spherical storage container is used as the storage container, the storage container from the shaking container 6 is used. Needed to prevent falling off. Further, the material of the curved surface type shaking container 6 is not particularly limited, but preferably, the photocatalyst is provided because the excitation light 14 irradiated from above can be reflected by disposing a reflective material on the inner wall. Can be activated more efficiently, so that the evaluation time can be shortened.

  FIG. 7 shows a state in which the photocatalyst of the evaluation object is activated using the photocatalyst activation device shown in FIG. In this figure, a light source 13 of excitation light is arranged on the upper part of the photocatalyst activation device, and the excitation light 14 irradiated from the light source 13 is placed on the upper part of the reciprocating shaker 10 and is in a cylindrical storage container in repeated rotational motion. 4 is continuously irradiated. The repetitive motion by the reciprocating shaker 10 is adjusted by the shake adjusting dial 15 and directly transmitted to the curved surface type shaking container 6 fixed on the shaking table 12. The cylindrical storage container 4 accommodated in the container 6 is cylindrically accommodated by the slope 25 of the curved surface type shaking container 6 so as to reduce the impact caused by the switching of the movement at the time of repetitive movement and to provide continuous and smooth rotational movement. It is characterized in that it has a function to give to the container 4. As a result, even if the object to be evaluated is three-dimensional, excitation light is uniformly irradiated on the entire surface, and the inside of the cylindrical storage container 4 can always come into contact with the evaluation solution in a stirred state, which is extremely efficient. The photocatalytic action can be evaluated well.

  8 activates the photocatalyst of the evaluation object in the spherical storage container 5 illustrated in FIGS. 4 to 5 by using the cylindrical shaking container 7 instead of the curved surface shaking container 6 shown in FIG. It shows how to do. Unlike the shaking container shown in FIG. 7, the cylindrical shaking container 7 shown here has no opening, and thus can prevent the storage container from jumping out due to excessive shaking, Since the upper half is made of a material that transmits the excitation light 14 and the lower half is made of the material 22 that reflects the excitation light 14, the photocatalytic action can be efficiently expressed. As a storage container that can be used in such a device, not only the spherical container 5 shown in the figure but also a cylindrical storage container 4 as shown in FIGS.

  9 activates the photocatalyst of the evaluation object in the spherical storage container 5 illustrated in FIGS. 4 to 5 by using the spherical shaking container 8 instead of the curved surface type shaking container 6 shown in FIG. It shows how to do. Although the spherical shaking container 8 shown here is made of a material that transmits the excitation light 14 in both the upper half and the lower half, the lower half is similar to the shaking container shown in FIG. It is possible to provide a reflecting material 22 for the excitation light 14 so that the photocatalytic action can be efficiently expressed, and the storage container is not limited to the spherical shape 5 shown in the figure, but is also shown in FIGS. A cylindrical storage container 4 like this can also be used.

  10 uses a rotary shaker 11 in place of the repetitive shaker shown in FIG. 7, and a hemispherical shake vessel 9 is fixed in place of the curved surface type shake vessel 6 to store in a spherical shape. The mode which activates the photocatalyst of the evaluation target object in the container 5 is shown. In the case of using a rotary shaker, since the rotary motion is continuous compared to the repetitive shaker, the movement in one direction is continuously performed, and the stirring in the storage container by the repetition is gently performed. It is effective when it is desired to prevent the photocatalyst from detaching due to friction. The hemispherical shaking container 9 shown here is made of a material that reflects the excitation light 14.

  The activation of the photocatalyst by the method of the present invention will be described in detail with reference to examples. However, the present invention is not limited to the following examples as long as the gist thereof is not exceeded.

Example
On the surface of a 0.36 x 24.5mm puncture needle (Facet Technologies CL-CRV 28G: SUS304 Medical grade stainless steel) using DC magnetron sputter (Bee Sputter), argon gas 65-68ccm, oxygen gas 32 ～35Ccm, output 0.9～1KW, distance 100mm between the titanium target and needle samples, titanium dioxide (TiO ₂₎ film having a thickness of 3000~3500Å under the conditions of sputtering time 80 minutes is formed, the titanium film puncture needle dioxide Obtained. Thereafter, the titanium dioxide film was annealed at 300 ° C. for 15 minutes to perform a crystallization treatment of titanium dioxide necessary for exhibiting the photocatalytic activity.

  Insert the obtained titanium dioxide-coated puncture needle into a sterilized capillary tube (inner diameter 0.45 mm, outer diameter 0.89 mm, volume 5 μl) capped with a sealant at one end, introduce 2 μl of bacterial solution, and seal the upper end of the capillary tube with the sealant It was plugged with. Note that the bacterial solution was prepared as follows.

  E. coli MG1665 was pre-cultured in 2 ml of LB medium for 6 hours at 37 ° C. and 190 rpm, then 1 ml of the culture was inoculated into 100 ml of LB medium and 37 ° C. and 170 rpm until OD660 reached 0.5 to 0.6. The main culture was performed for about 3 hours under the above conditions. The culture solution after the main culture was diluted 500 times with physiological saline (0.85% NaCl) and used for the antibacterial effect test.

Capillary tube containing titanium dioxide-coated puncture needle and bacterial solution is continuously repetitively moved under a 170 rpm condition using a shaker (Nisshin Science Products NA-201) in a curved surface shake vessel. Meanwhile, a black light having a wavelength of 365 nm and a light intensity of 0.5 mW / cm ² was irradiated for 45 minutes using a handy UV lamp (manufactured by ASONE, LUV-16).

  After ultraviolet irradiation, 2 μl of the bacterial solution in the capillary tube was washed away with 1 ml of physiological saline, and 100 μl of the total volume of about 1 ml was inoculated on the LB agar medium. Incubation was performed overnight at 37 ° C. After culture, the number of colonies generated was measured as the number of viable bacteria. The number of colonies was measured by setting 3 sets of 5 samples using the same culture solution. The average number of colonies for a total of 15 samples was 10.8. Moreover, when the average survival rate (%) was calculated from the value of the number of viable bacteria before being used for the measurement, it was 2.3%.

Comparative Example 1
In the examples, when irradiation with black light was not performed, the average number of colonies was 63, and the average survival rate was 13.3%.

Comparative Example 2
In the examples, when the titanium dioxide coating on the puncture needle was not performed, the average number of colonies was 141, and the average survival rate was 29.7%.

Comparative Example 3
In the examples, when the titanium dioxide coating on the puncture needle was not performed and the irradiation with black light was not performed, the average number of colonies was 211, and the average survival rate was 44.5%.

  As shown in the above results, the survival rate (colony number) of the Escherichia coli for the titanium dioxide-coated puncture needle (Example) irradiated with black light for 45 minutes is compared to the number of colonies of Comparative Example 1 where no black light is irradiated. 17%. On the other hand, with a puncture needle not coated with titanium dioxide (Comparative Example 2), about 68% of E. coli survived compared to the number of colonies of Comparative Example 3 that was not irradiated with black light. There was a noticeable difference.

Comparative Example 4
In the examples, the repetitive movement was not performed, and the number of colonies was measured for 5 samples. As a result, about twice as many colonies were confirmed as compared with the number of colonies of the example in which the repetitive movement was performed.

  As shown in the results of Comparative Example 4, when the photocatalyst included in the three-dimensional object is activated, the photocatalyst activation object is stored in the activation object storage container and the storage container is shaken. By rotating the storage container, there is a significant difference in the activation of the photocatalyst compared to the case where the storage container is not shaken, and the importance of shaking the storage container in the activation of the photocatalyst is shown. It was.

It is a figure which shows the example of 1 filling of the rod-shaped evaluation target object and the solution for evaluation to the cylindrical storage container of this invention. It is a figure which shows one filling example of the granular evaluation target object and the solution for evaluation to the cylindrical storage container of this invention. It is a figure which shows one filling example of the fibrous evaluation target object and evaluation solution to the cylindrical storage container of this invention. It is a figure which shows one filling example of the granular evaluation target object and the solution for evaluation to the spherical storage container of this invention. It is a figure which shows one filling example of the fibrous evaluation target object and the solution for evaluation to the spherical storage container of this invention. The structural example of the cylindrical storage container of this invention, a curved surface type shaking container, and a repetitive shaking machine is shown. An example of evaluation of the cylindrical storage container which combined the curved surface type shaking container and repetitive shaking machine of this invention is shown. An example of evaluation of the spherical storage container which combined the cylindrical shake container and repetitive shaker of this invention is shown. An example of evaluation of the spherical storage container which combined the spherical shaking container and repetitive shaking machine of this invention is shown. An example of evaluation of the spherical storage container which combined the hemispherical type shake container and rotary shaker of this invention is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rod-shaped evaluation object 2 Granular evaluation object 3 Fibrous evaluation object 4 Cylindrical storage container 5 Spherical storage container 6 Curved surface type shaking container 7 Cylindrical shaking container 8 Spherical shaking container 9 Hemispherical shaking Container 10 Repetitive shaker 11 Rotary shaker 12 Shaking table 13 Excitation light source 14 Excitation light 15 Shaking adjustment dial 16 Evaluation solution 17 Cylinder 18 Lid 19 Hollow hemisphere upper part 20 Hollow hemisphere lower part 21 Evaluation liquid inlet 22 Reflector 23 Fixing 24 Guide 25 Slope

Claims (14)

  (A) Shaking machine, (B) Shaking container for shaking an object to be activated having a curved surface installed on the shaking machine, (C) Compound having photocatalytic action An activation object storage container having a rotatable shape made of a material that transmits excitation light required for activation of photocatalysis for inserting an activation object contained as a component, and (D) the container A photocatalytic activation device comprising a light irradiator for irradiating an activation target with excitation light, which is provided on an upper part of a shaker.   The photocatalyst activation device according to claim 1, wherein the shaker is a repetitive vibration type shaker or a rotary vibration type shaker.   The photocatalyst activation device according to claim 1, wherein the shaking container is a curved surface type, a cylindrical type, a spherical type or a hemispherical type.   The photocatalyst activation device according to claim 1, wherein a reflection material for excitation light is provided on at least a part of the shaking container.   The photocatalyst activation device according to claim 1, wherein the activation object storage container has a spherical shape or a cylindrical shape.   The photocatalyst activation device according to claim 1, wherein the activation object has a powdery shape, a granular shape, a rod shape, or a fibrous shape.   The photocatalytic activity according to any one of claims 1 to 5, wherein the activation target is a photocatalytic activity evaluation target, and the photocatalytic activity evaluation device is used by further introducing a photocatalytic activity evaluation solution into the storage container. Device.   The photocatalytic action evaluation apparatus according to claim 7, wherein the photocatalytic action evaluation solution is a solution for evaluating an antibacterial action or a solution for evaluating a self-cleaning action.   9. The photocatalytic activity evaluation apparatus according to claim 8, wherein the solution for evaluating the antibacterial activity is a solution in which viable bacteria are suspended.   The photocatalytic activity evaluation apparatus according to claim 9, wherein the living bacteria is Escherichia coli.   The photocatalytic activity evaluation apparatus according to claim 10, wherein the Escherichia coli is Escherichia coli K12.   12. The photocatalytic activity evaluation apparatus according to claim 11, wherein the Escherichia coli K12 strain is Escherichia coli MG1665.   The photocatalyst activation device according to any one of claims 1 to 6, wherein the photocatalyst activation object is stored in the activation object storage container, and then the storage container is set in a shaking container on a shaker. A method for activating a photocatalyst, characterized in that irradiation of excitation light is performed from at least one direction to a storage container by a light irradiation body in a state where the storage container is rotated by shaking the shaker.   The photocatalytic activity evaluation apparatus according to any one of claims 7 to 12, wherein the photocatalytic activity evaluation target is stored in a storage container together with a photocatalytic activity evaluation solution, and then the storage container is placed in a shaking container on a shaker. Set and shake the shaker to rotate the storage container, then irradiate the storage container with excitation light from at least one direction with the light irradiator, and measure the change in the photocatalytic activity evaluation solution. A method for evaluating a photocatalytic action.

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