JP4358587B2 - Method for producing photocatalyst adsorbent and photocatalyst adsorbent - Google Patents

Description

  The present invention relates to a method for producing a photocatalyst adsorbent and a photocatalyst adsorbent.

  2. Description of the Related Art Conventionally, photocatalytic materials that are excited by being irradiated with light and exhibit a catalytic action are known.

  Such a photocatalyst exhibits a certain photoactive function when light required for a material (photocatalyst material) that exhibits a catalytic action is supplied to the photocatalyst material. Examples of the constant photoactive function expressed by the photocatalytic material include a deodorizing function that decomposes and removes odorous components that humans feel as bad odors, and a removal function of poisonous gas components that adversely affect the human body. In general, the photocatalytic function expressed by such a photocatalyst has a slow processing speed. For this reason, there exists a limit in the improvement of the photoactive function by a photocatalyst.

  Conventionally, there is an adsorbing material capable of adsorbing a target substance through a plurality of holes. Examples of such an adsorbing material include zeolite. Such an adsorbing material has a very high adsorption performance. For example, the adsorbent can adsorb gas components and poisonous gas components that emit odors as described above in a short time. Further, such an adsorbing material does not decompose gas components and poisonous gas components that generate odors when the adsorbing material itself is installed in a room temperature environment, for example. And if the adsorption | suction amount of gas which adsorption material has adsorb | sucks, it will not adsorb | suck more gas than it. That is, the adsorption function is lost.

  In view of these points, the organic metal material that is the raw material of the photocatalyst described above and the adsorbing material are combined, the gas component (target gas component) to be removed is adsorbed on the adsorbing material, and adsorbed on the adsorbing material. Conventionally, it has been studied that the target gas component is gradually decomposed and removed by a photocatalyst produced using an organometallic material as a raw material (see, for example, Patent Documents 1 and 2).

  For example, the organic metal material and the adsorbing material may be arranged closer to each other using an organic / inorganic binder (binder).

JP 2002-45689 A JP 2000-317314 A

  However, when the organometallic material and the adsorbing material are combined, the following problems occur.

  For example, when using an organic binder (organic binder) and arranging an organic metal material and an adsorbing material closer to each other, the organic binder is often decomposed by the photocatalyst, and the organic binder is deteriorated (deteriorated). ) May desorb the photocatalyst.

  In addition, for example, when an organic metal material and an adsorbing material are arranged closer to each other using an inorganic binder (inorganic binder), the adsorbing performance of the adsorbing material may be impaired depending on processing contents. Conventionally, there is a manufacturing method in which countermeasures against such problems in the inorganic binder are taken, but in order to realize a combination of an organometallic material and an adsorbing material by such a manufacturing method, a very expensive apparatus is introduced. There is a need. Accompanying the introduction of very expensive equipment is unsuitable for industrial production.

  An object of the present invention is to produce a photocatalyst adsorbent capable of suppressing deterioration in adsorption performance due to adsorption saturation of an adsorbent material by an industrially suitable production method.

  The method for producing a photocatalyst adsorbent according to claim 1 includes a step of uniformly mixing an organometallic material containing an organometallic compound and a porous adsorbent having a plurality of pores on the surface, and said organically mixed organic Supplying water to the mixed material of the metal material and the porous adsorbent, heating the mixed material supplied with water at a temperature within a first temperature range, and within the first temperature range Heating the mixed material heated at a temperature in a gas containing oxygen gas or oxygen-containing gas at a temperature within a second temperature range higher than the first temperature range. .

  Therefore, a coating of an organometallic material can be formed on the surface of the porous material without involving a particularly complicated and complicated process.

  According to a second aspect of the present invention, there is provided a method for producing a photocatalyst adsorbent, wherein the organic metal material and the porous adsorbent having a plurality of pores on a surface thereof are supplied with water while supplying the organic metal material and the organic metal material. A step of uniformly mixing a porous adsorbent, a step of heating a mixed material of the organometallic material and the porous adsorbent at a temperature within a first temperature range, and a step within the first temperature range. Heating the mixed material heated at a temperature in a gas containing oxygen gas or a gas containing an oxygen element at a temperature within a second temperature range higher than the first temperature range.

  Therefore, a coating of an organometallic material can be formed on the surface of the porous material without involving a particularly complicated and complicated process.

  The invention according to claim 3 is the method for producing a photocatalyst adsorbent according to claim 1 or 2, wherein the first temperature range is a range of 40 ° C. or more and 300 ° C. or less, and the second temperature range is The range is higher than 350 ° C. and lower than 1000 ° C.

  Therefore, the action of the invention according to claim 1 or 2 can be reliably achieved in practice.

  The invention according to claim 4 is the method for producing a photocatalyst adsorbent according to claim 1, 2 or 3, wherein the organic group is bonded to the metal ion by valence coordination of the metal ion, so The organometallic material is larger than the opening size of the pores of the porous material.

  Therefore, the coating of the organometallic material can be formed only on the surface portion that forms the outer shape of the porous material.

  The invention according to claim 5 is the method for producing a photocatalyst adsorbent according to claim 1, 2 or 3, wherein the metal ion is an acetylacetone group, dipivaloylmethanate group, hexafluoro group or isopropylcyclopenta group. A material having a valence coordinate bond of metal ions is used as the organometallic material.

  Therefore, the effect of the invention according to claim 1, 2 or 3 can be achieved without reducing the adsorption performance of the porous material.

  The invention according to claim 6 is the method for producing a photocatalyst adsorbent according to any one of claims 1 to 5, wherein the porous adsorbent has fine holes and adsorbs the target substance in the fine holes. With adsorption performance.

  Therefore, by adsorbing the target substance by adsorption into the micropores, it is possible to suppress the performance deterioration of the adsorption function regardless of the period of use.

  A seventh aspect of the present invention provides the photocatalyst adsorbent manufacturing method according to the first or second aspect, wherein moisture is supplied by introducing water vapor into the mixed material.

  Therefore, the supply of moisture to the mixed material can be realized by a practically easy method.

  According to an eighth aspect of the present invention, in the method for producing a photocatalyst adsorbent according to any one of the first to sixth aspects, water is supplied by introducing liquid water into the mixed material.

  Therefore, the supply of moisture to the mixed material can be realized by a practically easy method.

  According to a ninth aspect of the present invention, in the method for producing a photocatalyst adsorbent according to any one of the first to sixth aspects, water is supplied by spraying water on the mixed material.

  Therefore, the supply of moisture to the mixed material can be realized by a practically easy method.

  A tenth aspect of the present invention is the method for producing a photocatalyst adsorbent according to any one of the first to ninth aspects, wherein the porous adsorbent has a powder shape.

  Therefore, a large surface area can be secured without excessively increasing the volume of the porous adsorbent.

  According to an eleventh aspect of the present invention, in the method for producing a photocatalyst adsorbent according to the tenth aspect, the organometallic material has a powder shape.

  Therefore, it can be mixed more uniformly with the porous adsorbent in powder form.

  The photocatalyst adsorbent of the invention described in claim 12 is formed on the surface of the porous adsorbent using the porous adsorbent having a plurality of pores on the surface and the manufacturing method according to any one of claims 1 to 11. And a crystal film formed of an organometallic material including an organometallic compound.

  Therefore, a coating of an organometallic material can be formed on the surface of the porous material without involving a particularly complicated and complicated process.

  The invention according to claim 13 is the photocatalyst adsorbent according to claim 12, wherein the organic metal material has an organic group bonded to a metal ion by valence coordination of the metal ion, and has a single molecular size. The organic metal material is larger than the opening size of the pores of the porous material.

  Therefore, the effect of the invention of claim 12 can be achieved without reducing the adsorption performance of the porous material.

  The invention according to claim 14 is the photocatalyst adsorbing material according to claim 12, wherein the organometallic material has a metal ion having an acetylacetone group, a dipivaloylmethanate group, a hexafluoro group or an isopropylcyclopenta group. It is a material with valence coordinate bonding of ions.

  Therefore, the effect of the invention of claim 12 can be achieved without reducing the adsorption performance of the porous material.

  The invention according to claim 15 is the photocatalyst adsorbent according to any one of claims 12 to 14, wherein the porous adsorbent has fine pores and has an adsorption performance for adsorbing a target substance in the fine pores. Prepare.

  Therefore, by adsorbing the target substance by adsorption into the micropores, it is possible to suppress the performance deterioration of the adsorption function regardless of the period of use.

  According to the method for producing a photocatalyst adsorbent of the invention described in claim 1, since the coating of the organometallic material can be formed on the surface of the porous material without involving a particularly complicated and complicated process, the porous material Adsorbs target components by effectively demonstrating their inherent adsorption performance, and decomposes and removes the target components that have been adsorbed by the photocatalytic function of the photocatalyst produced from the organometallic material. A photocatalyst adsorbent capable of suppressing the deterioration of the adsorption performance can be produced by an industrially suitable production method.

  According to the method for producing a photocatalyst adsorbent of the invention described in claim 2, since the coating of the organometallic material can be formed on the surface of the porous material without involving a particularly complicated and complicated process, the porous material Adsorbs target components by effectively demonstrating their inherent adsorption performance, and decomposes and removes the target components that have been adsorbed by the photocatalytic function of the photocatalyst produced from the organometallic material. A photocatalyst adsorbent capable of suppressing the deterioration of the adsorption performance can be produced by an industrially suitable production method.

  According to the invention described in claim 3, in the method for producing the photocatalyst adsorbing material described in claim 1 or 2, the effect of the invention described in claim 1 or 2 can be obtained with certainty in practice.

  According to invention of Claim 4, in the manufacturing method of the photocatalyst adsorbent of Claim 1, 2, or 3, Claim 1, 2, or 3 without reducing the adsorption | suction performance which the porous material of a porous material has. The effects of the described invention can be achieved.

  According to invention of Claim 5, in the manufacturing method of the photocatalyst adsorbent of Claim 1, 2, or 3, Claim 1, 2, or 3 without reducing the adsorption | suction performance which the porous material of a porous material has. The effects of the described invention can be achieved.

  According to invention of Claim 6, in the manufacturing method of the photocatalyst adsorbent as described in any one of Claim 1 thru | or 5, it depends on a use period by adsorb | sucking a target substance by adsorption | suction to a micropore. Therefore, it is possible to provide a photocatalyst adsorbent that exhibits stable adsorption performance over a long period of time.

  According to the seventh aspect of the present invention, in the method for producing the photocatalyst adsorbent according to the first or second aspect, the water supply to the mixed material can be realized by a practically easy method.

  According to the invention described in claim 8, in the method for producing a photocatalyst adsorbent according to any one of claims 1 to 6, the supply of moisture to the mixed material can be realized by a practically easy method. it can.

  According to the ninth aspect of the invention, in the method for producing the photocatalyst adsorbent according to any one of the first to sixth aspects, the water supply to the mixed material is realized by a practically easy method. be able to.

  According to invention of Claim 10, in the manufacturing method of the photocatalyst adsorbent as described in any one of Claims 1 thru | or 9, it is possible to ensure a large surface area without excessively increasing the volume of the porous adsorbent. As a result, a higher adsorption function can be exhibited.

  According to invention of Claim 11, in the manufacturing method of the photocatalyst adsorbent of Claim 10, it can mix more uniformly with the porous adsorbent made into the powder form.

  According to the photocatalyst adsorbing material of the invention described in claim 12, since the coating of the organometallic material can be formed on the surface of the porous material without involving a particularly complicated and complicated process, the porous material originally has Adsorbing target components by effectively demonstrating the adsorption performance, and by decomposing / removing the adsorbed target components by the photocatalytic function of the photocatalyst produced from the organometallic material, A photocatalyst adsorbent capable of suppressing deterioration can be produced by an industrially suitable production method.

  According to the thirteenth aspect, in the photocatalyst adsorbing material according to the twelfth aspect, the effect of the invention according to the twelfth aspect can be achieved without deteriorating the adsorption performance of the porous material.

  According to the invention described in claim 14, in the photocatalyst adsorbing material described in claim 12, the effect of the invention described in claim 12 can be achieved without reducing the adsorption performance of the porous material of the porous material.

  According to the invention of claim 15, in the photocatalyst adsorbing material according to any one of claims 12 to 14, the target substance is adsorbed by adsorption to the micropores, so that the adsorption is not affected by the period of use. Since performance deterioration of the function can be suppressed, a photocatalyst adsorbent that exhibits stable adsorption performance over a long period of time can be provided.

  The best mode for carrying out the present invention will be described with reference to FIGS. This embodiment shows an application example to an adsorbent having a photocatalytic function (hereinafter referred to as a photocatalyst adsorbent).

  Although not particularly illustrated, the photocatalyst adsorbent contains a photocatalyst that exhibits a photocatalytic function when irradiated with light, and a porous adsorbent having a plurality of pores on the surface. The photocatalyst of this embodiment is generated using an organometallic material containing an organometallic compound as a raw material.

  Both the organometallic material and the adsorbing material of the present embodiment have a powder shape. The organometallic material in the photocatalyst adsorbent is provided on the surface of the porous adsorbent as a photocatalyst film by producing the photocatalyst adsorbent by the production method described below.

  First, the manufacturing method of a photocatalyst adsorption material is demonstrated. In producing the photocatalyst adsorbent, the organometallic material and the adsorbent are mixed in the atmosphere. Here, a step of uniformly mixing the organometallic material containing the organometallic compound and the porous adsorbent having a plurality of pores on the surface is realized.

  Examples of the organic metal material include an organic metal material in which an organic group is bonded to a metal ion with a valence coordinate of the metal ion, and a single molecular size is larger than an opening size of a pore of the porous material. It is done. As such an organic metal material, specifically, an organic metal in which an acetylacetone group, a dipivaloylmethanate group, a hexafluoro group, or an isopropylcyclopenta group is coordinate-bonded to the metal ion to the metal ion. Materials.

  More specifically, as the organometallic material, in addition to acetylacetonate zinc used in the present embodiment, for example, dipivaloylmethanate zinc, acetylacetonate iron, dipivaloylmethanate iron, Examples thereof include acetylacetonate copper and dipivaloylmethanate copper, but are not particularly limited to these organometallic materials.

  In this embodiment mode, acetylacetonate zinc powder is used as the organometallic material. In this embodiment, fine powder of natural zeolite is used as the adsorbing material. Here, 10 g of acetylacetonate zinc and 50 g of natural zeolite were mixed. The particle size of the fine powder of natural zeolite of the present embodiment is set to 10 μm or less.

  After thoroughly mixing the organometallic material and the adsorbing material, 20 ml of distilled water is added to the mixed material. Here, a step of supplying moisture to the mixed material of the organometallic material and the porous adsorbent that are uniformly mixed is realized.

  In this embodiment, when supplying moisture to the mixed material, even if moisture is supplied by introducing water vapor into the mixed material, moisture is supplied by introducing liquid water into the mixed material. Alternatively, moisture may be supplied by spraying water on the mixed material.

  Regardless of which method is used to supply moisture, the supply of moisture to the mixed material can be realized by a practically easy method.

  Subsequently, the mixed material to which distilled water is added is transferred to a heat-resistant container and slowly heated to 100 ° C. The mixed material is kept at a constant temperature (100 ° C.) until there is no moisture in the mixed material heated to 100 ° C. In this embodiment, the mixed material was kept at 100 ° C. for about 20 minutes. Here, a step of heating the mixed material supplied with moisture at a temperature within the first temperature range is realized. Note that the temperature at which the mixed material supplied with moisture is heated is not limited to 100 ° C., and the first temperature range is 40 ° C. to 300 ° C., and the mixed material is heated at a temperature within the first temperature range. What is necessary is just to heat. The first temperature range is a temperature range in which the mixed material is denatured so that the mixed material to be heated does not disappear due to vaporization or the like during heating in the second temperature range described later. In addition, when the organometallic material and the adsorbing material of the present embodiment are used, the first temperature range is set to 50 ° C. or higher and 200 ° C. or lower, so that the object to be heated is heated in the second temperature range described later. It is possible to more reliably prevent disappearance due to vaporization of the mixed material.

  After the moisture is gone, the mixed material is heated to 700 ° C. At this time, heating was performed while supplying oxygen to the mixed material. The heating rate was adjusted so that the temperature of the mixed material increased at 2 ° C./min. After the temperature of the mixed material reaches 700 ° C., the mixed material is held at 700 ° C. for 2 hours. Here, the mixed material heated at a temperature within the first temperature range is heated at a temperature within a second temperature range higher than the first temperature range in a gas containing oxygen gas or a gas containing oxygen element. The process to do is realized. In addition, the 2nd temperature range should just be a temperature range higher than the 1st temperature range mentioned above, and it is preferable that it is a range higher than 350 degreeC and less than 1000 degreeC. The second temperature range is a temperature range in which a compound having a photocatalytic composition that exhibits a photocatalytic function is produced by oxidizing the mixed material altered in the first temperature range described above. Note that when the organometallic material and the adsorbing material of the present embodiment are used, the coating of the organometallic material on the surface of the adsorbing material is more reliably performed by setting the second temperature range to 500 ° C. or more and 800 ° C. or less. Can be formed.

  After 2 hours, the photocatalyst adsorbent was produced by allowing to stand at room temperature and naturally cooling. The photocatalyst adsorbent produced in this way suppresses the occurrence of adsorption saturation in the adsorbent material by decomposing the target substance adsorbed on the adsorbent material by the coating of an organometallic material (photocatalyst) formed on the surface of the adsorbent material. In addition, it is possible to regenerate (restore) the adsorption performance by the adsorption material.

  The photocatalyst adsorbent thus produced was subjected to XRD measurement. The result is shown in FIG. FIG. 1 shows XRD measurement results of a zeolite simple substance (a graph indicated by a broken line in FIG. 1) and a photocatalyst adsorbent produced by the above-described manufacturing method (a graph indicated by a solid line in FIG. 1).

  Here, XRD (X-Ray Detector: X-ray diffractometry) measurement is a method for obtaining information on periodicity of atomic / molecular arrangement in a substance by utilizing a wave diffraction phenomenon. As shown in FIG. 2, in the XRD apparatus 1 that performs XRD measurement, an X-ray beam having a narrow wavelength (λ) is emitted from the X-ray source 2 to the surface of a sample (photocatalyst adsorbent in the present embodiment) 3. The angle 2θ of the diffraction line irradiated and diffracted by the detector 4 so as to satisfy the Bragg equation (nλ = 2dsinθ) on the lattice plane of the crystal grain spacing (d) of the sample 3 (in FIG. 1) Horizontal axis) and strength (vertical axis in FIG. 1) are measured. By this XRD measurement, crystallinity (crystallinity) and crystal orientation can be measured, a crystalline substance can be identified, and a residual stress value on the surface of a thin film or the like can be measured. In the XRD measurement, the angle θ is continuously changed while rotating the sample 3, and the detector 4 is rotated optically so that the position of the detector 4 becomes 2θ. Detect incoming X-rays.

  As can be seen from FIG. 1, a crystal peak of zinc oxide is observed in the graph of the photocatalyst adsorbent produced by the production method described above. This confirms that a zinc oxide crystal coating is formed on the natural zeolite surface. Further, as can be seen from FIG. 1, it can be seen from the graph of the photocatalyst adsorbent produced by the production method described above that the crystal structure of the zeolite on which the zinc oxide crystal coating is formed has not changed.

  As described above, in the present embodiment, the step of uniformly mixing the organometallic material containing the organometallic compound and the porous adsorbent having a plurality of pores on the surface, and the uniformly mixed organometallic material and the porous adsorption A step of supplying moisture to the mixed material with the material, a step of heating the mixed material supplied with moisture at a temperature within the first temperature range, and a mixed material heated at a temperature within the first temperature range. Heating the photocatalyst adsorbent by a method for producing a photocatalyst adsorbent comprising a step of heating at a temperature within a second temperature range higher than the first temperature range in a gas containing oxygen gas or a gas containing an oxygen element. By manufacturing, it is possible to form a coating of organometallic material on the surface of the porous material without involving any particularly complicated and complicated processes, so that the adsorption performance inherent in the porous material can be effectively demonstrated and targeted Adsorbed and adsorbed components The photocatalyst adsorbent that can suppress the deterioration of the adsorption performance due to adsorption saturation of the adsorbent material is decomposed and removed by the photocatalytic function of the photocatalyst produced from the organic metal material as the raw material. It can be manufactured by a manufacturing method.

  Note that the method for producing the photocatalyst adsorbent is not limited to the method of the above-described embodiment, and water is supplied to the organometallic material containing the organometallic compound and the porous adsorbent having a plurality of pores on the surface. The step of uniformly mixing the organometallic material and the porous adsorbent while heating the mixed material of the organometallic material and the porous adsorbent at a temperature within the first temperature range, and the first temperature range And heating the mixed material heated at a temperature within a second temperature range higher than the first temperature range in a gas containing oxygen gas or oxygen element-containing gas. You may make it manufacture a photocatalyst adsorbent with the manufacturing method of an adsorbent.

  Even with such a method, as described above, a coating of an organometallic material can be formed on the surface of the porous material without involving a particularly complicated and complicated process. Adsorbing target components effectively, and decomposing and removing the target components that have been adsorbed by the photocatalytic function of the photocatalyst produced from the organometallic material, reducing the adsorption performance due to adsorption saturation of the adsorbent material The photocatalyst adsorbent which can be suppressed can be manufactured by an industrially suitable manufacturing method.

  In addition, by setting the first temperature range to a range of 40 ° C. or more and 300 ° C. or less and the second temperature range to a range higher than 350 ° C. and lower than 1000 ° C., the above-described effects can be surely achieved practically. .

  Further, in this embodiment, an organic metal material in which an organic group is bonded to a metal ion by valence coordination of the metal ion, and a single molecular size is larger than an opening size of a hole of the porous material. By using it, since the coating of the organometallic material can be formed only on the surface portion forming the outer shape of the porous material, the above-described effects can be achieved without reducing the adsorption performance of the porous material.

  At this time, as an organometallic material, a material in which an acetylacetone group, a dipivaloylmethanate group, a hexafluoro group, or an isopropylcyclopenta group is bonded to a metal ion with a valence coordinate bond of the metal ion is used as the organometallic material. Thus, the above-described effects can be surely achieved in practice.

  In the present embodiment, the porous adsorbent has fine pores and has an adsorption performance for adsorbing the target substance in the fine pores, so that it suppresses the performance deterioration of the adsorption function and is stable over a long period of time. The photocatalyst adsorption material which exhibits can be provided.

  In the present embodiment, since both the organometallic material and the adsorbing material have a powder shape, the porous adsorbing material does not excessively increase the volume occupied by the porous adsorbing material. Since a large surface area can be ensured, a higher adsorption function can be exhibited, and for an organometallic material, it can be mixed more uniformly with a porous adsorbent in powder form, A photocatalyst adsorbent having more stable performance can be provided.

  Next, the adsorption function and the photocatalytic function of the photocatalyst adsorbent thus produced were measured. First, as the measurement of the adsorption function of the photocatalyst adsorbent, the adsorption performance with respect to 30 ppm ammonia gas was measured. In the present embodiment, the photocatalyst adsorbent is placed in a 3 liter Tedlar bag filled with 30 ppm ammonia gas, and by measuring the residual ammonia ratio (%) in the Tedlar bag after a predetermined time has elapsed, the adsorption performance for 30 ppm ammonia gas is It measured with respect to each of a zeolite simple substance and a photocatalyst adsorbent. The measurement was performed 5 times. At this time, the irradiated light includes light having a wavelength of 400 nm or less.

  Here, FIG. 3 is a graph showing the results of the first measurement of the adsorption performance described above. As can be seen from FIG. 3, in the first measurement, it is understood that the zeolite simple substance and the photocatalyst adsorbent have comparable ammonia adsorption performance.

  FIG. 4 is a graph showing the results of the fifth measurement of the adsorption performance described above. As can be seen from FIG. 4, in the fifth measurement, it can be seen that the ammonia adsorption performance of the photocatalyst adsorbent is higher than the ammonia adsorption performance of the zeolite alone. This is because adsorption saturation occurs in zeolite alone and ammonia adsorption performance deteriorates, whereas adsorption saturation does not occur in the photocatalyst adsorbing material. Further, as can be seen from FIG. 4, it can be seen that the photocatalyst adsorbing material has the same ammonia adsorption performance in the first measurement and the fifth measurement. That is, it can be seen that adsorption saturation does not occur in the photocatalyst adsorbing material.

  Next, the photocatalytic function of the photocatalyst adsorbent was measured. In the present embodiment, the photocatalytic ability was measured when the photocatalyst adsorbing material was irradiated with light having a wavelength of 400 nm or less. As a result, it was confirmed that a good photocatalytic function was developed. In the present embodiment, the photocatalytic function is determined based on the fact that the adsorption performance of the photocatalyst adsorbent is not saturated (adsorption saturation does not occur).

  By the way, it is known that the adsorption amount of the adsorbing material varies depending on the presence or absence of light irradiation, and the allowable amount of adsorption decreases when irradiated with light. The natural zeolite in the photocatalyst adsorbent of the present embodiment reduces the adsorption performance when irradiated with light having a wavelength of 400 nm, and releases the adsorbed gas components and the like into the atmosphere. Note that the gas component adsorbed by the photocatalyst adsorbent and released into the atmosphere varies depending on the type of the adsorbed gas component. In the present embodiment, for example, a phenomenon observed in a gas component such as NOx is shown. When ammonia is used as the gas component, the gas component is not released even when the photocatalyst adsorbent is irradiated with light having a wavelength of 400 nm or less.

  For this reason, the timing of light irradiation is adjusted. For example, when the concentration of the gas component to be removed around the photocatalyst adsorbent is high, the adsorption of the target gas component by the adsorbent is prioritized and the light is applied to the photocatalyst adsorbent. Adsorption function and photocatalyst function by reducing the irradiation, while increasing the light irradiation to the photocatalyst adsorbent by giving priority to the photocatalyst function when the concentration of the gas component to be removed around the photocatalyst adsorbent is low And can be demonstrated together. As a result, gas components that emit odors and poisonous gas components can be adsorbed in a short time, and the adsorbed gas components to be removed can be decomposed and removed over a long period of time by the photocatalytic function. It can be made to exhibit stably over.

It is a chart which shows the XRD measurement result of the photocatalyst adsorption material of one best embodiment for implementing this invention. It is a schematic diagram explaining the measurement principle of a XRD apparatus. It is a graph which shows the measurement 1st result of a zeolite simple substance and photocatalyst adsorption material adsorption | suction performance. It is a graph which shows the measurement 5th result of a zeolite simple substance and photocatalyst adsorption material adsorption | suction performance.

Explanation of symbols

3 Photocatalyst adsorbent

Claims (15)

A step of uniformly mixing an organometallic material containing an organometallic compound and a porous adsorbent having a plurality of pores on the surface;
Supplying moisture to the mixed material of the organometallic material and the porous adsorbent mixed uniformly;
Heating the mixed material supplied with moisture at a temperature within a first temperature range;
The mixed material heated at a temperature within the first temperature range is heated at a temperature within a second temperature range higher than the first temperature range in a gas containing oxygen gas or a gas containing an oxygen element. And a process of
A method for producing a photocatalyst adsorbent comprising: A step of uniformly mixing the organometallic material and the porous adsorbent while supplying moisture to the organometallic material containing the organometallic compound and the porous adsorbent having a plurality of pores on the surface;
Heating the mixed material of the organometallic material and the porous adsorbent at a temperature within a first temperature range;
The mixed material heated at a temperature within the first temperature range is heated at a temperature within a second temperature range higher than the first temperature range in a gas containing oxygen gas or a gas containing an oxygen element. And a process of
A method for producing a photocatalyst adsorbent comprising: The first temperature range is a range of 40 ° C. or more and 300 ° C. or less,
The method for producing a photocatalyst adsorbent according to claim 1 or 2, wherein the second temperature range is higher than 350 ° C and lower than 1000 ° C.   An organic group is bonded to a metal ion with a valence coordinate of the metal ion, and the organometallic material having a single molecular size larger than an opening size of a hole of the porous material is used. Or the manufacturing method of the photocatalyst adsorption material of 3.   4. The material according to claim 1, 2 or 3, wherein a material in which an acetylacetone group, a dipivaloylmethanate group, a hexafluoro group or an isopropylcyclopenta group is bonded to a metal ion with a valence coordinate bond of the metal ion is used as the organometallic material. Manufacturing method of the photocatalyst adsorbent.   The said porous adsorbent is a manufacturing method of the photocatalyst adsorbent as described in any one of Claim 1 thru | or 5 provided with the adsorption | suction performance which has a micropore and adsorb | sucks a target substance to this micropore.   The method for producing a photocatalyst adsorbent according to claim 1 or 2, wherein moisture is supplied by introducing water vapor into the mixed material.   The method for producing a photocatalyst adsorbent according to any one of claims 1 to 6, wherein moisture is supplied by introducing water in a liquid state into the mixed material.   The manufacturing method of the photocatalyst adsorption material as described in any one of Claim 1 thru | or 6 which supplies a water | moisture content by spraying water with respect to the said mixed material.   The method for producing a photocatalyst adsorbent according to any one of claims 1 to 9, wherein the porous adsorbent has a powder shape.   The method of manufacturing a photocatalyst adsorbent according to claim 10, wherein the organometallic material has a powder shape. A porous adsorbent having a plurality of pores on the surface;
A crystal film formed on the surface of the porous adsorbent using the production method according to any one of claims 1 to 11 and formed of an organometallic material containing an organometallic compound;
A photocatalyst adsorbent comprising:   The organometallic material is an organometallic material in which an organic group is bonded to a metal ion by valence coordination of the metal ion, and a single molecular size is larger than an opening size of a hole of the porous material. The photocatalyst adsorbent according to claim 12.   13. The photocatalytic adsorption according to claim 12, wherein the organometallic material is a material in which an acetylacetone group, a dipivaloylmethanate group, a hexafluoro group, or an isopropylcyclopenta group is bonded to a metal ion by a valence coordinate bond of the metal ion. Wood. The photocatalyst adsorbent according to any one of claims 12 to 14, wherein the porous adsorbent has fine pores and has an adsorption performance for adsorbing a target substance in the fine pores.

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