CN111742934A - Photocatalyst air sterilization disinfectant and application thereof - Google Patents
Photocatalyst air sterilization disinfectant and application thereof Download PDFInfo
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- CN111742934A CN111742934A CN202010382776.XA CN202010382776A CN111742934A CN 111742934 A CN111742934 A CN 111742934A CN 202010382776 A CN202010382776 A CN 202010382776A CN 111742934 A CN111742934 A CN 111742934A
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- photocatalyst
- disinfectant
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- sterilization
- disinfection
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- 239000000645 desinfectant Substances 0.000 title claims abstract description 50
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 33
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- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/26—Phosphorus; Compounds thereof
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/06—Aluminium; Calcium; Magnesium; Compounds thereof
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/185—Phosphorus; Compounds thereof with iron group metals or platinum group metals
- B01J27/1853—Phosphorus; Compounds thereof with iron group metals or platinum group metals with iron, cobalt or nickel
-
- B01J35/39—
-
- B01J35/396—
Abstract
The invention relates to a photocatalyst air sterilization disinfectant, which is specifically prepared by dissolving novel photocatalyst nano-particles with a core-shell structure, a small amount of sterilization and disinfection accelerant and a dispersing agent in water, wherein the novel photocatalyst structure is a core-shell double-layer nano-structure with the particle size of 0.05-10 microns, the core material is doped and modified nano-photocatalyst particles with the particle size of 0.005-1 micron, the shell material is a nano-porous layer with the mesoporous characteristic, and the thickness of the shell material is 0.05-5 microns. The air disinfectant can be directly sprayed in the air, has the characteristics of long-acting sterilization and disinfection, colorless products, no peculiar smell and harmlessness after being inhaled, and is suitable for sterilization and disinfection in the environments of airports, stations, offices, homes and the like.
Description
Technical Field
The invention relates to the field of novel materials for sterilization and disinfection, in particular to a novel air sterilization and disinfection agent.
Background
In general, the most common disinfectant products are classified by composition: chlorine-containing disinfectants, peroxide disinfectants, aldehyde disinfectants, alcohol disinfectants, iodine-containing disinfectants, phenol disinfectants, ethylene oxide, biguanide disinfectants and quaternary ammonium salt disinfectants. These products are inherently useful for disinfection in public areas, but almost all disinfectants are associated with harsh odors, short duration of action, large amounts of inhalation or exposure to harmful health hazards, while disinfectants such as alcohol are associated with flammable and explosive risks. Based on the disinfectant, a novel disinfectant product which is free of peculiar smell, harmless to suck and effective for a long time and is suitable for air disinfection is developed, and the disinfectant is more suitable for air sterilization and disinfection of indoor environments such as airports, stations, museums, offices, houses and the like.
Chinese patent CN106577820A discloses an air disinfectant, a preparation method thereof, and CN101485331A a nano-silver disinfectant, which respectively disclose inorganic antibacterial air disinfectants mainly based on nano-silver. However, the use of nanosilver, especially air disinfectants, is controversial. Although there is no direct evidence of the effects of nanosilver on human health at present, we can see from some in vitro experiments that silver may have potential hazards. It has been shown that exposure to silver nanoparticles can lead to inflammatory responses, oxidative stress, genotoxicity (effects on germ cells), and cytotoxicity. Therefore, air sterilization does not suggest the use of nano silver from the viewpoint of safety.
Chinese patent CN109568341A discloses a high-efficiency nano photocatalyst disinfectant and a preparation method thereof, and CN107184982A discloses a nano photocatalyst disinfectant and a preparation method thereof, and the like, which respectively disclose technical ideas of air sterilization and disinfection by using a photocatalyst. However, since the photocatalytic reaction of the photocatalyst has universality, the photocatalyst can not only sterilize and disinfect, but also damage organic substrates such as plastics, rubber, paint and the like in construction objects when being directly sprayed, and the patent technology is not considered to protect the substrates and is limited in application.
Disclosure of Invention
The invention provides a photocatalyst air sterilization disinfectant, which is prepared from the following raw materials:
photocatalyst nanoparticles and water.
As an embodiment of the present invention, the preparation raw material further comprises: an accelerant for sterilization and disinfection.
As an embodiment of the present invention, the preparation raw material further comprises: a dispersant.
As an embodiment of the present invention, the photocatalyst nanoparticles are core-shell nanostructures.
In one embodiment of the present invention, the photocatalyst nanoparticles have a particle size of 0.05 to 10 μm.
In one embodiment of the present invention, the photocatalyst nanoparticles have an inner core particle size of 0.005 to 1 μm.
In one embodiment of the present invention, the shell thickness of the photocatalyst nanoparticles is 0.05 to 5 μm.
In one embodiment of the present invention, the shell material of the photocatalyst nanoparticles is a porous material having mesoporous characteristics.
In one embodiment of the present invention, the surface of the porous material having mesoporous characteristics has a positive charge.
Photocatalyst nanoparticles
The photocatalyst nano-particles are of core-shell nano-structures.
The core of the core-shell nano structure is inorganic photocatalyst nano particles or modified inorganic photocatalyst nano particles.
In the invention, the material of the core-shell nano structure only needs to satisfy the following conditions: when irradiated with light of an appropriate wavelength, the light is absorbed by the material in an energetic manner, thereby exciting the bulk of the material to generate electrons and holes. Negatively charged electrons and oxygen molecules (O) on the surface of the photocatalyst2) The reaction can generate superoxide anion (O) with strong reducing ability2 -) Positive charge holes and water molecules (H) on the surface of the photocatalyst2O) generates hydroxyl radical (OH) with strong oxidative decomposition capability; the hydroxyl radicals are capable of decomposing organic matter into carbon dioxide and water.
The material of the core-shell nanostructure of the present invention may be any material known to those skilled in the art that satisfies the above conditions.
As the above-mentioned material, there may be exemplified one selected from: at least one of nano titanium dioxide, doped modified titanium dioxide, zinc oxide, doped modified zinc oxide, bismuth vanadate, modified bismuth vanadate, carbon nitride, modified carbon nitride, titanium nitride and modified titanium nitride.
In a preferred embodiment of the present invention, the particle size of the core material is 0.005 to 1 μm.
The shell material of the photocatalyst nano-particles is a porous material with mesoporous characteristics.
In the invention, the porous material with mesoporous characteristic means that the pore diameter of the surface pores of the porous material is 2-50 nm.
As an embodiment of the present invention, the porous material may be any one known to those skilled in the art, whether organic or inorganic; for example, a polysaccharide-based porous material, a ceramic-based porous material, or a metal-based porous material may be selected.
In a preferred embodiment of the present invention, the porous material is preferably a ceramic-based porous material.
The ceramic porous material may be at least one selected from the group consisting of nano zeolite, nano hydroxyapatite, sepiolite, and diatomaceous earth.
In a more preferred embodiment of the present invention, the porous material has a surface electronegativity that is a positive charge.
The porous material with the surface electronegativity being positive charge can be selected from a natural porous material with the surface electronegativity being positive charge or a modified porous material.
The porous material with natural positive charges on the surface can be hydrotalcite and other similar materials.
In a more preferred embodiment of the present invention, the porous material has a surface ph value that is alkaline.
The porous material with alkaline surface pH value can be alkaline zeolite molecular sieve, amino modified porous material and quaternary ammonium salt modified porous material.
In a preferred embodiment of the present invention, the porous material is an amino-modified porous material or a quaternary ammonium salt-modified porous material.
From the viewpoint of improving the dispersibility and the stability, the porous material is a quaternary ammonium salt modified porous material.
The quaternary ammonium salt modified porous material is selected from quaternary ammonium salt modified nano zeolite, quaternary ammonium salt modified nano hydroxyapatite, quaternary ammonium salt modified sepiolite and quaternary ammonium salt modified diatomite.
Another aspect of the present invention provides a method for preparing the photocatalyst nanoparticles, comprising:
step A) providing a core inorganic photocatalyst material;
step B) providing a shell material;
step C), preparing photocatalyst nano particles: mixing the material in the step A and the material in the step B according to the mass percentage of 1: (1-8), performing high-energy ball milling for 3-8 h, performing high-speed centrifugation to obtain a precipitate, performing sintering reaction at 300 ℃ for 0.1-1 h to obtain photocatalyst particles with a composite structure, and performing sand milling on the photocatalyst particles to 0.05-10 mu m.
Sterilizing and disinfecting accelerator
The sterilization and disinfection accelerant comprises at least one of hydrogen peroxide, sodium percarbonate peroxide, peracetic acid, citric acid, chlorine dioxide, sodium hypochlorite, alcohol, iodine, quaternary ammonium salt and other disinfection materials.
Dispersing agent
The dispersing agent comprises at least one of nano silicon dioxide, nano calcium phosphate and nano aluminum oxide.
The invention also provides a preparation method of the sterilizing disinfectant, which comprises the following steps:
the air sterilization disinfectant can be obtained by dissolving photocatalyst nano-particles, a sterilization and disinfection accelerant and a dispersing agent in water and shearing and dispersing for 2 hours.
The invention also provides application of the disinfectant, and the disinfectant is applied to air sterilization and disinfection of indoor environments such as airports, stations, museums, offices, houses and the like.
Has the advantages that:
firstly, no peculiar smell is generated. The patent adopts photocatalyst inorganic nano materials as main functional components for sterilization and disinfection, and no substances with obvious volatility are added in the formula, so that no peculiar smell is generated during disinfection, and the photocatalyst inorganic nano materials are suitable for disinfection when people move in public areas.
② the health is harmless. The formula does not contain any toxic and harmful substances appearing in the European Union REACH169 standard, ensures safety, and is harmless to inhalation and contact.
Thirdly, the quick and long-acting functions of sterilization and disinfection coexist. The formula of the novel disinfectant contains quick-acting and long-acting sterilization and disinfection components, after the novel disinfectant is used, the sterilization effect can take effect immediately within a few seconds, and the sterilization and disinfection capability of the surface of an object can be continuously and effectively maintained within one month.
And fourthly, universality to bacteria and viruses. This patent core material is photocatalyst nano-material, and the main bactericidal principle is that photocatalyst nano-particle is under the illumination, and the hydroxyl free radical that arouses water and oxygen in the air and produce and have strong redox ability also negative oxygen ion, carries out the destruction to bacterium, virus through principles such as degradation organic matter and destruction protein, consequently, photocatalyst's bactericidal action is all effective to all kinds of bacterium, virus almost, has the universality during the application.
And a modified photocatalyst technology is adopted, so that the photocatalytic efficiency of the nano material is improved and the nano material has a visible light response characteristic. One limitation of the application of the traditional photocatalyst material is that ultraviolet light is required to be excited to have photocatalytic sterilization capability, and the technology carries out doping modification on the nano titanium dioxide photocatalyst so that the exciting light wave extends to the visible light wave band, thus the photocatalyst can play a role in sterilization and disinfection under the irradiation of visible light such as common indoor lamplight.
Sixthly, a photocatalyst nano coating technology. The two limitations of the application of the traditional photocatalyst material are that due to the universality of the photocatalysis, the photocatalyst material not only can sterilize, disinfect, but also can destroy and age organic materials such as plastics, rubber, resin and the like, thereby reducing the service life of a plurality of construction objects. Therefore, the technology adopts the nano coating technology to treat the photocatalyst particles, so that a layer of mesoporous inorganic material is coated around each photocatalyst nanoparticle in the product, and the photocatalyst nanoparticles are not in direct contact with a construction object actually when attached to the surface of the construction object after the product is constructed, thereby avoiding the influence on the base material. Therefore, the photocatalyst of the technology has no substrate selectivity and can be directly applied to almost all materials.
Drawings
FIG. 1 is a schematic diagram of a structure of a photocatalyst nanoparticle
FIG. 2 scanning electron micrograph of photocatalyst nanoparticles
FIG. 3 is a photograph showing the adsorption and killing of bacteria (Escherichia coli) by photocatalyst nanoparticles
Detailed Description
The present invention will be described in detail with reference to specific examples.
Example 1:
preparation of photocatalyst nano-particles
Step A) providing a core inorganic photocatalyst material
Doped with Fe3+TiO2Preparation: measuring 10ml tetrabutyl titanate, slowly adding into 50ml acetone, adding triethanolamine 1.2ml, stirring for 20min, simultaneously adding 1.5ml glacial acetic acid and 10ml Fe (NO) with concentration of 0.1mol/L3)3Fully stirring the solution, adjusting the pH value to 3-5, standing for 5 hours to obtain sol, transferring the sol into an electric furnace, heating to 500 ℃, and preserving the temperature for 1 hour to obtain anatase phase Fe-doped solution3+TiO2。
Wherein the temperature gradient is 3 ℃ per hour; then preserving the heat at 500 ℃ for 1h, and naturally cooling to room temperature.
Step B) providing a shell material
Preparing a porous shell material: weighing 50ml of absolute ethyl alcohol, adding 1.6g of calcium nitrate in the stirring process, adding 5g of phosphorus pentoxide powder after uniformly stirring, heating in a water bath for 30min to obtain gel, transferring the gel into a tubular electric furnace, heating to 1000 ℃, preserving heat for 2h to obtain a porous solid product, naturally cooling to room temperature, carrying out high-energy ball milling on the porous solid product for 2h, and further carrying out sand milling until the particle size reaches 0.05-5 mu m.
Grinding and pulverizing to obtain porous solid product
(1) Dispersing the porous solid product in a nitric acid/hydrogen peroxide mixed solution according to a mass ratio of 5:100, carrying out ultrasonic stirring treatment at normal temperature of 35KHz for 45min, carrying out reflux reaction at 120 ℃ for 2h, washing the product with deionized water for 3 times until the pH value is 6-7, and carrying out vacuum drying at 80 ℃ for 2h to obtain a porous solid product containing epoxy groups and carboxyl groups;
wherein the mass concentration of the nitric acid is 65 percent, the mass concentration of the hydrogen peroxide is 30 percent, and the volume ratio is 1: 3.
(2) Dispersing a porous solid product containing epoxy groups and carboxyl groups into deionized water, wherein the dispersion concentration is 10mg/ml, and ultrasonically stirring for 30min at 60 ℃ under 30 KHz; dissolving dicetyl dimethyl ammonium bromide in deionized water at the temperature of 80 ℃ according to the concentration of 0.06mg/mL, slowly adding the solution into the dispersion liquid of the porous solid product, respectively calculating the mixing mass ratio of the quaternary ammonium salt to the porous solid product to be 1:10, continuously stirring at the temperature of 60 ℃ for 30min, then carrying out suction filtration, washing for 3 times by using the deionized water, and drying at the temperature of 60 ℃ for 2h to obtain the shell material.
Step C), preparing photocatalyst nano particles: and C, mixing the products prepared in the steps A and B according to the mass percentage of 1: 5, mixing, carrying out high-energy ball milling for 5h, carrying out high-speed centrifugation to obtain a precipitate, carrying out sintering reaction at 300 ℃ for 0.5h to obtain photocatalyst particles with a composite structure, and carrying out sand milling on the photocatalyst particles to 0.05-10 mu m. The product structure is schematically shown in figure 1; the scanning electron microscope image of the product structure is shown in fig. 2.
Photocatalyst air sterilizing disinfectant
Weighing 2g of the photocatalyst nanoparticles, 2g of sodium carbonate peroxide and 0.5g of hydrophilic fumed silica, dissolving in 100ml of water, and shearing and dispersing for 2 hours to obtain the air disinfectant.
Comparative example 1
Preparation of photocatalyst nano-particles
Doped with Fe3+TiO2Preparation: measuring 10ml tetrabutyl titanate, slowly adding into 50ml acetone, adding triethanolamine 1.2ml, stirring for 20min, simultaneously adding 1.5ml glacial acetic acid and 10ml Fe (NO) with concentration of 0.1mol/L3)3Fully stirring the solution, adjusting the pH value to 3-5, standing for 5 hours to obtain sol, transferring the sol into an electric furnace, heating to 500 ℃, and preserving the temperature for 1 hour to obtain anatase phase Fe-doped solution3+TiO2。
Wherein the temperature gradient is 3 ℃ per hour; then preserving the heat at 500 ℃ for 1h, and naturally cooling to room temperature.
Photocatalyst air sterilizing disinfectant
Weighing 2g of the photocatalyst nano-particles, 2g of sodium carbonate peroxide and 0.5g of hydrophilic fumed silica, dissolving in 100ml of water, and shearing and dispersing for 2 hours to obtain the air sterilization disinfectant in the comparative example.
Comparative example 2
Weighing 2g of the photocatalyst nanoparticles obtained in the first step of example 1 and 0.5g of hydrophilic fumed silica, dissolving in 100ml of water, and shearing and dispersing for 2h to obtain the air disinfectant in the comparative example.
Comparative example 3
Weighing 2g of photocatalyst nano-particles obtained in the first step of example 1 and 2g of sodium percarbonate, dissolving in 100ml of water, and shearing and dispersing for 2h to obtain the air disinfectant in the comparative example.
Comparative example 4
Preparation of photocatalyst nano-particles
Step A) providing a core inorganic photocatalyst material
Doped with Fe3+TiO2Preparation: measuring 10ml tetrabutyl titanate, slowly adding into 50ml acetone, adding triethanolamine 1.2ml, stirring for 20min, simultaneously adding 1.5ml glacial acetic acid and 10ml Fe (NO) with concentration of 0.1mol/L3)3Fully stirring the solution, adjusting the pH value to 3-5, standing for 5 hours to obtain sol, transferring the sol into an electric furnace, heating to 500 ℃, and preserving the temperature for 1 hour to obtain anatase phase Fe-doped solution3+TiO2。
Wherein the temperature gradient is 3 ℃ per hour; then preserving the heat at 500 ℃ for 1h, and naturally cooling to room temperature.
Step B) providing a shell material
Preparing a porous shell material: weighing 50ml of absolute ethyl alcohol, adding 1.6g of calcium nitrate in the stirring process, adding 5g of phosphorus pentoxide powder after uniformly stirring, heating in a water bath for 30min to obtain gel, transferring the gel into a tubular electric furnace, heating to 1000 ℃, preserving heat for 2h to obtain a porous solid product, naturally cooling to room temperature, carrying out high-energy ball milling on the porous solid product for 2h, and then carrying out sand milling until the particle size reaches 0.05-5 mu m to obtain the shell material.
Step C), preparing photocatalyst nano particles: and C, mixing the products prepared in the steps A and B according to the mass percentage of 1: 5, mixing, carrying out high-energy ball milling for 5h, carrying out high-speed centrifugation to obtain a precipitate, carrying out sintering reaction at 300 ℃ for 0.5h to obtain photocatalyst particles with a composite structure, and carrying out sand milling on the photocatalyst particles to 0.05-10 mu m. The product structure is schematically shown in figure 1; the scanning electron microscope image of the product structure is shown in fig. 2.
Photocatalyst air sterilizing disinfectant
Weighing 2g of the photocatalyst nanoparticles, 2g of sodium carbonate peroxide and 0.5g of hydrophilic fumed silica, dissolving in 100ml of water, and shearing and dispersing for 2 hours to obtain the air disinfectant.
And (3) performance testing:
1. example 1 and comparative example 1 were compared
The product of the example 1 and the product of the comparative example 1 are sprayed on the surface of the plastic at the same time, and transferred to an ultraviolet aging box for xenon lamp aging for 0.5h, and the result shows that the product of the comparative example 1 causes the plastic to be obviously yellowed, and the product of the example 1 has no obvious change.
The plastic is PVC.
2. Example 1 and comparative example 2 were compared
When the products of the example 1 and the comparative example 2 are sprayed on the surfaces of the fabrics with cultured bacteria simultaneously and the bacteria content is immediately tested, the results show that the survival of the bacteria can be detected within 10min after the construction of the product of the comparative example 2, but the product of the example 1 can not be detected.
The bacteria are staphylococcus aureus; the culture process is carried out by directly putting bacteria on the surface of the fabric.
3. Example 1 and comparative example 3 were compared
The product of this example 1 was compared to the product of comparative example 3 in appearance, the product of comparative example 3 being translucent and noticeably cloudy, while the product of example 1 remained as a pale clear solution.
4. Example 1 and comparative example 4 were compared
4.1 the product of this example 1 was compared in appearance with the product of comparative example 4, the product of comparative example 4 being a light clear solution and the product of example 1 being a light clear solution.
4.2 after the product of the example 1 and the product of the comparative example 4 are placed in an ultraviolet aging box and aged for 0.5h by a xenon lamp, the product of the comparative example 4 is a semi-turbid solution, and the product of the example 1 is still a light transparent solution.
4.3 after the product of example 1 and the product of comparative example 4 were left at room temperature for 1 month, the product of comparative example 4 was a semi-turbid solution, while the product of example 1 was still a pale transparent solution.
The present invention has been described in detail with reference to the specific examples provided herein to facilitate the understanding and appreciation of the invention by those skilled in the art. Various modifications to these embodiments may be readily made by those skilled in the art, and applied to other embodiments without undue invasive labor. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should be able to make modifications and alterations to the present invention without departing from the scope of the present invention.
Claims (10)
1. A photocatalyst air sterilization disinfectant is characterized in that the preparation raw materials comprise:
photocatalyst nanoparticles and water.
2. The photocatalyst air disinfectant as set forth in claim 1, characterized in that the preparation raw material further comprises: an accelerant for sterilization and disinfection.
3. The photocatalyst air disinfectant as set forth in claim 1 or 2, characterized in that the preparation raw material further comprises: a dispersant.
4. The photocatalyst air disinfectant as recited in claim 1, wherein said photocatalyst nanoparticles are core-shell nanostructures.
5. The photocatalyst air disinfectant as set forth in claim 1, wherein the photocatalyst nanoparticles have a particle size of 0.05 to 10 μm.
6. The photocatalyst air disinfectant as set forth in claim 4, wherein the photocatalyst nanoparticles have an inner core particle size of 0.005 to 1 μm.
7. The photocatalyst air disinfectant as set forth in claim 4, wherein the photocatalyst nanoparticles have a shell thickness of 0.05 to 5 μm.
8. The photocatalyst air disinfectant as set forth in any one of claims 4 to 7, wherein the shell material of the photocatalyst nanoparticles is a porous material having mesoporous characteristics.
9. The photocatalyst air disinfectant as set forth in claim 8, wherein the surface of the porous material having mesoporous characteristics has a positive charge.
10. The photocatalyst air disinfectant as claimed in any one of claims 1 to 9, wherein the disinfectant is used for air disinfection in indoor environments such as airports, stations, museums, offices, homes, and the like.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113144265A (en) * | 2021-04-22 | 2021-07-23 | 广州懿恒空气净化技术有限公司 | Photocatalyst peculiar smell processor |
| CN115553302A (en) * | 2022-01-14 | 2023-01-03 | 华升科技集团有限公司 | Sterilizing composition containing nano-scale titanium dioxide and preparation method thereof |
-
2020
- 2020-05-08 CN CN202010382776.XA patent/CN111742934A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113144265A (en) * | 2021-04-22 | 2021-07-23 | 广州懿恒空气净化技术有限公司 | Photocatalyst peculiar smell processor |
| CN115553302A (en) * | 2022-01-14 | 2023-01-03 | 华升科技集团有限公司 | Sterilizing composition containing nano-scale titanium dioxide and preparation method thereof |
| CN115553302B (en) * | 2022-01-14 | 2023-11-03 | 华升科技集团有限公司 | Disinfecting composition containing nanoscale titanium dioxide and preparation method thereof |
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