KR100741170B1 - Zeolite photocatalytic paper and its manufacturing method therof - Google Patents

Abstract

A zeolite photo-catalytic paper and a manufacturing method thereof are provided to maintain the inherent adsorption property of the adsorbent by means of zeolite. An inorganic fiber is injected into the purified water and agitated so that the inorganic fiber is dispersed into the purified water well. One or more absorbent selected among X-type zeolite, Y-type zeolite, ZSM-5 type zeolite and one or more photo-catalyst selected between titanium dioxide and the MxTiO2 type photo-catalyst by bonding a metal ion with the titanium dioxide are injected and mixed with the inorganic fiber. Thereafter, a cohesive agent is injected into the mixed water and the coagulation having types such as absorbent-photo catalyst, inorganic fiber-photo catalyst and absorbent-inorganic fiber-photo catalyst is performed so that a slurry is obtained in order to manufacture the photo catalyst paper. The slurry is supplied to the paper manufacturing apparatus so that the paper is manufactured after the dehydration and dry processes.

Description

Zeolite photocatalytic paper and its manufacturing method {Zeolite photocatalytic paper and its manufacturing method therof}

1 is a photograph showing an enlarged surface of a zeolite photocatalyst species according to the present invention.

2 is a photograph of a honeycomb filter made of zeolite photocatalyst paper.

3 is a graph showing a comparison between the amount of acetaldehyde removal and the amount of decomposition of zeolite photocatalyst paper and photocatalyst paper containing activated carbon.

4 is a carbon dioxide increase according to acetaldehyde removal rate (■) and acetaldehyde removal while repeatedly injecting 1000 ppm acetaldehyde at 4 hour intervals while irradiating UV to the honeycomb prepared by the zeolite photocatalyst paper prepared in Example in an enclosed space. (□) It is a graph showing the measurement result.

The present invention relates to a zeolite photocatalyst paper comprising zeolite, a photocatalyst and ceramic fiber as an essential component, and a method of preparing the same. More specifically, the present invention relates to a zeolite-photocatalyst, a ceramic fiber-photocatalyst using an inorganic fiber, a zeolite and a photocatalyst as a coagulant. The present invention relates to a paper and a method for manufacturing the same, which are excellent in durability by combining in the form of and can quickly remove volatile organic compounds and pollutants of several ppm indoors.

The present invention relates to an air purifying material for rapidly removing contaminants such as low-volume volatile organic compounds (VOC), nitrogen oxides, and sulfur oxides of less than several ppm indoors by adsorption and photolysis. A photocatalyst having a characteristic of decomposing volatile organic compounds on the surface by irradiation of an adsorbent having the function of adsorbing the above-mentioned pollutants and ultraviolet rays having a wavelength of 320 to 380 nm and an inorganic material for preventing known decomposition due to the irradiation of ultraviolet rays. A paper comprising a fiber and a method for producing the same.

Conventional technologies for indoor air purification materials to which the present invention belongs are mainly used activated carbon filter material manufactured by manufacturing a paper containing activated carbon and molding it into honeycomb, and honeycomb coated with titanium dioxide photocatalyst on the activated carbon filter material. Extruded honeycomb made of inorganic materials such as cordierite, honeycomb made of metal such as aluminum, polymer resin honeycomb, glass tube, and the like, or a material coated with these activated carbon and titanium dioxide, respectively, are also used.

However, as described above, the indoor air purification material used by coating titanium dioxide removes indoor pollutant gas only by oxidative decomposition reaction by titanium dioxide, and the photooxidation reaction, which is inherent to titanium dioxide, by a binder used when coating titanium dioxide. Since this greatly lowers the removal rate is slow and complete removal is difficult. In addition, the material such as metal material, extruded honeycomb, glass tube, etc., the surface is beautiful, there is a fear that the coated titanium dioxide is peeled off.

In particular, when titanium dioxide is coated on a honeycomb base made of paper or a polymer material, which is not a metal or an inorganic material, the base is decomposed by irradiation with ultraviolet rays, and thus its properties are degraded with use. In addition, in the case of coating titanium dioxide on paper containing activated carbon and in the case of honeycomb air purification material made of paper containing both activated carbon, titanium dioxide and ceramic fibers, the pores of the activated carbon are formed into tens to hundreds of nanometers of pores. Titanium dioxide particles of several nanometers permeate and fill the adsorption pores of activated carbon, thereby degrading the adsorption characteristic of activated carbon. In addition, since titanium dioxide in activated carbon pores is difficult to be irradiated with ultraviolet rays, it is difficult to expect a decomposition reaction of pollutant gas on the surface of titanium dioxide caused by ultraviolet irradiation. In addition, the photocatalyst material containing activated carbon has a disadvantage that it is not visually appealing when it is mounted in a facility used for indoor air purification as its color is black.

A common problem of the conventional photocatalyst material is that the removal rate of the polluted air is slow, it is difficult to remove it completely, and the decomposition of the material itself proceeds due to the influence of ultraviolet rays, thereby deteriorating durability.

In the present invention, by using a zeolite having a pore size of less than 1 nanometer (nm) as an adsorbent for adsorption of contaminated air as a constituent of paper to improve these problems, it is possible to maintain the adsorption characteristics inherent to the adsorbent, pore size Compared with the photocatalyst having a larger particle size, the photocatalyst is present only on the surface of the adsorbent without being inserted into the pores of the adsorbent, so that most of the photocatalyst contained in the matrix exhibits its characteristics.

Accordingly, an object of the present invention is to provide a paper containing a zeolite adsorbent capable of adsorbing contaminants, a photocatalyst having a larger particle size than the pore size of the adsorbent, and an adsorbent and photocatalyst mainly composed of inorganic fibers, and a method of manufacturing the same.

Paper containing the zeolite adsorbent and photocatalyst of the present invention maximizes the removal rate by effectively exhibiting the adsorption and photolysis characteristics of the contaminated air, and includes a durable adsorbent and a photocatalyst that hardly undergoes known decomposition despite irradiation with ultraviolet rays. We can provide paper to say.

In addition, the indoor air purification material whose main material is a paper containing a zeolite adsorbent and a photocatalyst or a paper containing an adsorbent and a photocatalyst prepared by a method for producing a paper containing a zeolite adsorbent and a photocatalyst is visually colored as white. Also it can have a consumer's favor, has the advantage that the honeycomb shape can be free.

In order to achieve the above-mentioned object, the paper containing the adsorbent and the photocatalyst of the present invention contains zeolite, TiO ₂ photocatalyst and inorganic fiber as essential components.

The zeolite which is a component of the paper containing the zeolite, the photocatalyst and the inorganic fiber of the present invention (hereinafter, the paper containing the zeolite, the photocatalyst and the inorganic fiber is simply referred to as "zeolite photocatalyst paper") is contained in the contaminated air. Zeolites having excellent porosity characteristics can be used for volatile organic compounds (VOC), nitrogen oxides (NOx), and sulfur oxides (SOx). As an example of such a zeolite in the present invention, a synthetic zeolite may be used rather than a natural zeolite, and at least one selected from X-type zeolite, Y-type zeolite, and ZSM-5-type zeolite may be used as the synthetic zeolite.

The zeolite adsorbent may contain 10 to 30% of the total weight of the dried zeolite photocatalyst species. If the zeolite photocatalyst species contains less than 10% of the total weight, it is difficult for the zeolite photocatalyst paper to sufficiently adsorb contaminants. If the zeolite photocatalyst species contains more than 30% of the total weight, the other major constituents of photocatalyst and inorganic fiber As the content decreases, there is a concern that the removal of contaminants and the properties of the paper will decrease as a result.

In the present invention, using a zeolite having a pore size smaller than the particle size of the photocatalyst described later can maximize the air removal characteristics of the zeolite photocatalyst paper. For example, in the present invention, when the zeolite has a pore size of several nanometers to several tens of nanometers (nm), the photocatalyst described later has several tens of nanometers (nm) to several tens of micrometers so that the particle size is larger than the zeolite pore size. (Μm) is used to prevent the photocatalyst from being inserted into the pores of the adsorbent.

As the photocatalyst in which the zeolite photocatalyst species of the present invention is a component, a substance capable of oxidatively decomposing volatile organic compounds, nitrogen oxides, sulfur oxides, etc. adsorbed by the zeolite adsorbent by irradiation with ultraviolet rays may be used. As one example of such a photocatalyst in the present invention, any one or more selected from titanium dioxide (TiO ₂ ) and MxTiO ₂ may be used. In the MxTiO ₂ is as combining the metal ions in the titanium dioxide (TiO ₂₎ for the purpose of improving the properties of titanium dioxide (TiO ₂₎ in MxTiO ₂ type photocatalyst M is from Pd, Pt, Cu, Au, Ni, Cr Any one metal selected and x is from 0.1 to 0.5.

The photocatalyst may contain 10 to 30% of the total weight of the zeolite photocatalyst species. If the zeolite photocatalyst species contains less than 10% of the total weight of the photocatalyst, it is difficult to sufficiently remove the contaminants adsorbed by the zeolite adsorbent. If the zeolite photocatalyst species is used more than 30% of the total weight of the zeolite photocatalyst, zeolite adsorbent is another major component. As the content of inorganic fibers decreases, there is a concern that the adsorption of pollutants and the characteristics of paper may decrease.

The inorganic fiber which is a component of the zeolite photocatalyst paper of the present invention improves the tensile properties of the paper and removes the contaminants adsorbed on the paper by the zeolite adsorbent using photocatalyst and ultraviolet light without decomposing the contaminants by irradiation of ultraviolet light. Used to improve durability. As one example of the inorganic fibers in the present invention, any one or more selected from alumino silicate fibers, alumina fibers, and silicate fibers based on Al ₂ O ₃ -SiO ₂ may be used.

In the inorganic fiber, zeolite photocatalyst species may contain 10 to 30% of the total weight. If the zeolite photocatalyst species contains less than 10% of the total weight of inorganic fibers, the durability of the zeolite photocatalyst species is reduced, and if the zeolite photocatalyst species is used more than 30% of the total weight, the content of other main components such as zeolite adsorbent and photocatalyst is increased. As a result, there is a fear that the adsorption and removal characteristics of contaminants will decrease.

The zeolite photocatalyst paper of the present invention may further include various additives in order to improve properties. Such additives can be used insofar as they can improve the properties of the zeolite photocatalyst paper of the present invention. As an example of such an additive in the present invention, any one or more selected from silica sol, polyvinyl acetate, pulp (cellulose) fiber, and calcite (sepiolite) may be used. In the above additive, the zeolite photocatalyst species may contain less than 10%, more preferably 1 to 10% of the total weight.

The present invention includes a method for producing a zeolite photocatalyst paper.

Method for producing a zeolite photocatalyst paper of the present invention

(1) adding inorganic fiber to purified water maintained at a viscosity of 20 to 30 cps using a thickener and stirring to release the inorganic fiber to be dispersed well in purified water, and mixing the inorganic fiber evenly with an inorganic fiber by adding an adsorbent and a photocatalyst,

(2) after the step (1), a flocculant is added to combine zeolite, photocatalyst and inorganic fiber in the form of zeolite-photocatalyst, ceramic fiber-photocatalyst and zeolite-photocatalyst-ceramic fiber to obtain a slurry for preparing zeolite photocatalyst paper step,

(3) supplying the slurry obtained after step (2) to a paper manufacturing apparatus, and dehydrating and drying the process to produce paper.

The present invention can obtain a zeolite photocatalyst paper having a thickness of 0.2 to 0.4 mm and a density of 150 to 450 g / m ² from steps (1) to (3).

Hereinafter, the method for preparing the zeolite photocatalyst species of the present invention will be described in more detail by each step.

Step (1): mixing and dispersing inorganic fibers, zeolites and photocatalysts

In step (1), inorganic fibers, zeolites and photocatalysts are added and dispersed in purified water using a thickener to maintain a predetermined viscosity.

First, inorganic fibers are added to purified water having a viscosity of about 20 to 30 cps, followed by stirring at 1000 rpm or more for 30 minutes or more, preferably at 1000 to 3000 rpm for 0.5 to 2 hours, after which the fine fibers are dissolved and dispersed in the purified water. And photocatalyst.

When the inorganic fibers are not properly processed in the purified water, that is, when the inorganic fibers are not dispersed in the purified water but partially agglomerated and added together, the zeolite and the photocatalyst are added together, and the inorganic fibers are entangled together to decompose the inorganic fibers. Since this becomes more difficult, it is good to first make the inorganic fiber finely dispersed and dispersed in the purified water as described above.

The inorganic fiber is an essential component of the zeolite photocatalyst paper to improve the durability of the paper by combining with the photocatalyst, to maintain the tensile strength of the zeolite photocatalyst paper and to make the paper porous so that the zeolite and the photocatalyst can be well held in the paper. Used to do Inorganic fibers in the present invention can be used as long as they can play the above role. As one example of the inorganic fibers in the present invention, any one or more selected from aluminosilicate fibers, silica fibers, and alumina fibers may be used in an amount of 0.1 to 0.4% based on the weight of purified water.

In the present invention, when the inorganic fiber is less than 0.1% by weight of the purified water, the tensile strength and the bending strength of the zeolite photocatalyst paper are reduced, making it difficult to form honeycomb, and the paper is densified, making it difficult to support the adsorbent and the photocatalyst. In addition, when inorganic fibers are used in excess of 0.4% of the weight of purified water, a relatively small amount of adsorbent and photocatalyst should be used in consideration of the density of paper. Therefore, the amount of adsorbent and photocatalyst remaining in the zeolite photocatalyst species is reduced. There is a problem that the adsorption characteristics and photolysis characteristics are reduced.

The zeolite added in the step (1) is an essential component of the zeolite photocatalyst paper, which is contained in the zeolite photocatalyst paper to adsorb and remove contaminants such as volatile organic compounds, nitrogen oxides, or sulfur oxides which contact the paper surface. Used as As an example of the zeolite used for this purpose, any one or more synthetic zeolites selected from X-type zeolites, Y-type zeolites, and ZSM-5-type zeolites may be used in an amount of 0.1% to 0.4% by weight of purified water.

When the amount of the zeolite adsorbent used in the present invention is added below the above range, the removal effect of the polluted air by adsorption is difficult to be expected, and when it exceeds the above range, the content of the inorganic fiber and the photocatalyst is relatively high. Since the density of the paper can be properly maintained at a low level, the tensile and photolysis characteristics of the zeolite photocatalyst paper are consequently deteriorated, which is not preferable.

The photocatalyst added in the step (1) is an essential component of the zeolite photocatalyst paper, which is oxidatively decomposed in the interior of the zeolite photocatalyst paper by contacting the surface of the paper with volatile organic compounds, nitrogen oxides, sulfur oxides, etc. In addition, the adsorbing ability of the zeolite adsorbent is restored by oxidatively decomposing these contaminant gases when the contaminants saturated in the zeolite pores of the zeolite photocatalyst paper diffuse out onto the adsorbent surface.

The photocatalyst added in order to achieve the object in the present invention may use at least one selected from titanium dioxide (TiO ₂ ), MxTiO ₂ 0.1 to 0.4% by weight of the purified water. When the amount of the photocatalyst added in the zeolite photocatalyst species is less than the above range, there is a problem that the photocatalytic decomposition of the pollutants hardly occurs and the pollutants are removed only by adsorption by the adsorbent. In addition, when the zeolite photocatalyst species is used in the photocatalyst exceeding the above-mentioned range, the zeolite photocatalyst species does not have an effect of ultraviolet rays due to the formation of an excess photocatalyst layer on the surface, and thus it is not possible to expect a desired role. As the content is relatively reduced, there is a concern that the adsorption characteristics of the pollutants and the molding characteristics of the zeolite photocatalyst paper into honeycomb may be impaired.

In the photocatalytic MxTiO ₂ is as combining the metal ions in the titanium dioxide (TiO ₂₎ for the purpose of improving the properties of titanium dioxide (TiO ₂₎ M in MxTiO ₂ type photocatalyst is Pd, Pt, Cu, Au, Ni, It is any metal chosen from Cr, and x is 0.1-0.5.

Zeolite, which is one of the essential components in the zeolite photocatalyst paper of the present invention, has a pore size smaller than the particle size of the photocatalyst, which is good for removing contaminants by the photocatalyst. For example, in the present invention, when the zeolite has a pore size of several nanometers (nm), the photocatalyst described later uses a particle size of several tens of nanometers (nm) so as to have a larger pore size than the zeolite pore size. It is advisable to prevent insertion into the pore.

Meanwhile, in the step (1), various additives may be further added to improve the properties of the zeolite photocatalyst paper. Such additives may be used insofar as they can improve the properties of the zeolite photocatalyst paper of the present invention. As an example of such an additive in the present invention, any one or more selected from silica sol, polyvinyl acetate, pulp (cellulose) fiber, and vesicles (sepiolite) is less than 0.1% by weight of purified water, preferably 0.01 to 0.1. % Can be used.

Step (2): adding a flocculant to combine zeolite, photocatalyst, and inorganic fiber in the form of zeolite-photocatalyst, ceramic fiber-photocatalyst and zeolite-photocatalyst-ceramic fiber to obtain a slurry for preparing zeolite photocatalyst paper,

Step (2) is a slurry combined in the form of zeolite-photocatalyst, ceramic fiber-photocatalyst and zeolite-photocatalyst-ceramic fiber by adding a flocculant into the slurry mixed with the inorganic fiber, zeolite and photocatalyst obtained in step (1). To get it.

That is, in step (1), a flocculant is added to the purified water mixed with the inorganic fiber, the zeolite, and the photocatalyst to bind the inorganic fibers, the zeolite, and the photocatalyst particles to an electrochemically appropriate size in the slurry, and then through the circular network of the paper manufacturing apparatus. It is added to prevent these particles from escaping, and in particular, by inducing binding of an adsorbent and a photocatalyst or an inorganic fiber and a photocatalyst, it is possible to prevent decomposition of the photocatalyst paper during ultraviolet irradiation.

In the present invention, polydialidimethylammonium chloride (PDADMAC) is used as an example of such a coagulant, and is included in a slurry such as aluminum sulfate and a cationic starch to remove repulsive force between inorganic particles and to impart ionic bonding power. Any one or more selected from conventional flocculants used to promote aggregation of the particles can be used.

The addition amount of the flocculant is not limited because the concentration of the cation varies depending on the type of flocculant, but the range is 2 to 10 ppm. When the addition amount of the flocculant is excessive, agglomerates between inorganic fibers, zeolites, photocatalysts, and the like contained in the slurry are formed too large, resulting in paper non-uniformity with a decrease in slurry fluidity during paper production. On the contrary, when the addition amount of the flocculant is too small, the inorganic substances contained in the slurry are well dispersed, but the binding between them is weak so that fine particles such as adsorbents or photocatalysts come out together with the white water and are not suspended in the zeolite photocatalyst species. Due to this, the properties of the paper are greatly reduced.

On the other hand, the dispersant may be further added to the slurry obtained in the step (2) to induce aggregates in the slurry to be evenly distributed throughout the slurry. As an example of such a dispersant in the present invention, any one or more selected from anion dispersants PAM (A-PAM), anionic polyacrylamide, and anionic starch may be used. In this case, the dispersant may be added in an amount of 0.01 to 0.05% based on the weight of the purified water of step (1).

Step (3): preparing a paper by supplying a slurry in which inorganic fibers, zeolites and photocatalysts are mixed to a conventional paper manufacturing apparatus

Through the steps (1) to (3) as described above, the preparation of the slurry for the preparation of zeolite photocatalyst species is completed, and step (3) is typically performed on the slurry obtained after steps (1) to (2). It is a process of manufacturing paper through a dehydration and drying process by supplying it to a paper manufacturing apparatus to be used. After supplying the slurry obtained after the above steps (1) to (2) to the paper manufacturing apparatus and undergoing the papermaking process of step (3), the zeolite photocatalyst having a thickness of 0.2 to 0.4 mm and a density of 150 to 450 g / m ² Paper can be produced. If the thickness of the zeolite photocatalyst paper is not produced within the above-described range, the characteristics of the photocatalyst honeycomb cannot be sufficiently exhibited, and the density of the zeolite photocatalyst paper described above may be determined by It can be obtained if it is not out of the proper range. In addition, after supplying the slurry obtained after the above steps (1) to (2) to the paper manufacturing apparatus, through the papermaking process of step (3), the content of the inorganic fiber is 10-30% of the total weight of the zeolite photocatalyst species It is possible to obtain a zeolite photocatalyst paper having an adsorbent content of 10 to 30% of the total weight of the zeolite photocatalyst species and 10 to 30% of the total weight of the zeolite photocatalyst species.

On the other hand, the present invention using the zeolite photocatalyst paper prepared in the first step to the third step can be obtained a filter for air purification in the shape of a polarized body of one side is flat and the other side is corrugated.

In addition, the present invention can obtain an air purification filter in which a plurality of the above-mentioned polarization molded products are stacked, or a honeycomb-type air purification filter obtained by cutting the polarization molded product into a cylindrical shape and cutting it into a desired size (see FIG. 2).

Hereinafter, the content of the present invention will be described in detail through examples and test examples. However, these are intended to explain the present invention in more detail, and the scope of the present invention is not limited thereto.

<Example>

The zeolite photocatalyst paper of the present invention was prepared by the following steps (1) to (7).

(1) 1000 liters (L) of purified water was taken to the stirring tank.

(2) 150 g of sodium carboxymethyl cellulose as a thickener was added while the stirrer installed in the stirring vessel was rotated at 1200 rpm to maintain the viscosity of water at 25 cps.

(3) 300 g of polyethylene glycol (PEG-6000), 300 g of vesicles (cepirolite), and 800 g of pulp were added to the purified water of step (2) as additives to help formability of the paper at 20 minute intervals.

(4) 2000 g of alumina fiber as inorganic fiber, 2000 g of Y-type zeolite as adsorbent, and 1500 g of titanium dioxide as photocatalyst were added to the purified water containing the additive of step (3) at 20 minute intervals, respectively, in order of 30 rpm for 30 minutes. The slurry was prepared while maintaining the stirring speed. At this time, the zeolite was used having an average pore size of 0.6 nanometers (nm), and the photocatalyst was used having a particle size of 20 nanometers, the pore size of the adsorbent is smaller than the particle size of the photocatalyst.

(5) 400 g of polydialidimethylammonium chloride (PDADMAC), a cationic flocculant, was added to the slurry obtained in step (4) to bind Y-type zeolite distributed in the slurry with titanium dioxide, inorganic fibers, and titanium dioxide. Induced and the reaction time was maintained for 30 minutes.

(6) 200 g of the anionic dispersant (A-PAM) was added to the slurry of step (5) to induce the aggregates in the slurry to be evenly distributed throughout the slurry to complete the slurry production.

(7) The slurry obtained in the above step (6) was supplied to a conventional paper manufacturing apparatus, followed by natural dehydration, vacuum suction dehydration, and compression dehydration, and passed through a dry roll having a surface temperature of 60 ° C. 8% zeolite photocatalyst paper was obtained.

The zeolite photocatalyst paper prepared by step (1) and step (7) showed a thickness of 0.31 mm and basis weight of 145 g / m ² , and the surface photograph thereof is shown in FIG. 1.

In addition, a honeycomb-type filter was made using the zeolite photocatalyst paper prepared in step (1) and step (7), which is shown in FIG. 2.

<Test Example>

The amount of acetaldehyde removed and the amount of carbon dioxide increase by photolysis of the honeycomb filter made of the zeolite photocatalyst prepared in the above example were measured and the results are shown in FIGS. 3 and 4, respectively.

FIG. 3 shows the removal rate of acetaldehyde (adsorption by zeolite + titanium dioxide) when the zeolite photocatalyst prepared in Example was placed in a sealed space of 10 liter (L) volume containing 300 ppm acetaldehyde and irradiated with UV light. Acetaldehyde removal rate ●) and carbon dioxide increase (decomposition of zeolite photocatalyst paper + carbon dioxide increase ○) due to acetaldehyde decomposition are shown.

As can be seen in FIG. 3, the acetaldehyde removal rate (●) of the zeolite photocatalyst paper was about 73% when UV was irradiated for 180 minutes, and the acetaldehyde removal rate (■) of the photocatalyst paper containing activated carbon was about 60%. The photocatalyst paper was found to be about 12% higher, and the amount of carbon dioxide increase due to the photooxidation reaction of titanium dioxide contained in the photocatalyst species was higher in zeolite photocatalyst paper (○) than in activated carbon zeolite paper (□). It can be seen that.

These results can be seen as a result of the titanium dioxide included in the zeolite photocatalyst paper because the photooxidation reaction is superior to the activated carbon photocatalyst paper in which the titanium dioxide is distributed in the pores of activated carbon because the zeolite and zeolite photocatalyst species are well distributed on the surface.

4 is a carbon dioxide increase according to acetaldehyde removal rate (■) and acetaldehyde removal while repeatedly injecting 1000 ppm acetaldehyde at 4 hour intervals while irradiating UV to the honeycomb prepared by the zeolite photocatalyst paper prepared in Example in an enclosed space. It is the result of measuring (square). As can be seen in Figure 4, the acetaldehyde removal characteristics by the honeycomb made from the zeolite photocatalyst produced in the present invention showed excellent properties with almost no known decomposition due to almost the same level without changing the properties even in repeated adsorption decomposition. .

As described above, the present invention has been described with reference to the preferred embodiments and test examples, but a person skilled in the art may vary the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be understood that modifications and changes can be made.

Recently, the awareness of polluted air, such as volatile organic compounds of less than a few ppm generated indoors, is emerging, and new homes use indoor medium such as activated carbon containing super carbon to remove traces of VOC generated indoors. Efforts to improve are being sought variously, and demand for air purifiers to remove these VOCs is increasing rapidly.

The zeolite photocatalyst species according to the present invention have contaminants such as volatile organic compounds, nitrogen oxides and sulfur oxides, which are continuously generated in laundry, printing shops, new houses, etc. by simultaneously adsorbing and photocatalytic decomposition of contaminated air. The material can be effectively and quickly removed to provide a comfortable indoor environment, and the durability can be greatly improved to extend the life.

In particular, the zeolite photocatalyst paper according to the present invention has superior acetaldehyde removal characteristics and close to white color as compared to conventional photocatalyst paper containing activated carbon. As it is a material that can be used, it is expected not only to generate demand, but also to import substitution effect.

Claims (7)

Paper for removing indoor volatile organic compounds and contaminants by adsorption and photocracking reaction, At least one inorganic fiber selected from aluminosilicate (Al ₂ O ₃ -SiO ₂ ) fiber, alumina fiber, silicate fiber, X-type zeolite, Y-type zeolite, ZSM-5 type zeolite, any one or more adsorbents selected from titanium dioxide ( TiO ₂ ), Paper comprising any one or more photocatalyst selected from MxTiO ₂ type photocatalyst in which metal ions are bonded to titanium dioxide (TiO ₂ ). In the MxTiO ₂ type photocatalyst, M is any metal selected from Pd, Pt, Cu, Au, Ni, and Cr, and x is 0.1 to 0.5. In the manufacture of paper comprising adsorbents for removing indoor volatile organic compounds and contaminants, photocatalysts and ceramic fibers, (1) Inorganic fibers are added to purified water and stirred to release the inorganic fibers well in purified water, at least one adsorbent selected from X zeolite, Y zeolite and ZSM-5 zeolite, titanium dioxide (TiO ₂ ), Mixing at least one photocatalyst selected from MxTiO ₂ type photocatalysts in which metal ions are bonded to titanium dioxide (TiO ₂ ), and mixing them evenly with inorganic fibers; (2) after the step (1) to add a flocculant to agglomerate in the form of an adsorbent-photocatalyst, an inorganic fiber-photocatalyst, an adsorbent-inorganic fiber-photocatalyst to obtain a slurry for producing a photocatalytic paper, (3) A method for producing paper comprising an adsorbent, a photocatalyst and ceramic fibers, wherein the slurry obtained after step (2) is supplied to a paper making apparatus to produce paper through a dehydration and drying process. In the MxTiO ₂ type photocatalyst, M is any metal selected from Pd, Pt, Cu, Au, Ni, and Cr, and x is 0.1 to 0.5. The method of claim 2, wherein the adsorbent comprises 10 to 30% of the weight of the dried paper. The method of claim 2, wherein the photocatalyst is contained in an amount of 10 to 30% by weight of the dried paper. The method of claim 2, wherein the inorganic fiber is any one or more selected from aluminosilicate (Al ₂ O ₃ -SiO ₂ ) fibers, alumina fibers, silicate fibers, the production of paper containing 10 to 30% by weight of the dried paper Way. The method of claim 2, wherein the flocculant is at least one selected from polydialidimethylammonium chloride (PDADMAC), aluminum sulfate, and cationic starch. An air purifier filter made of paper produced by the method of claim 2.

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