CN109210635B - Air purification equipment - Google Patents
Air purification equipment Download PDFInfo
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- CN109210635B CN109210635B CN201810944941.9A CN201810944941A CN109210635B CN 109210635 B CN109210635 B CN 109210635B CN 201810944941 A CN201810944941 A CN 201810944941A CN 109210635 B CN109210635 B CN 109210635B
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
- F24F8/167—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using catalytic reactions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/192—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by electrical means, e.g. by applying electrostatic fields or high voltages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
- F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/90—Cleaning of purification apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Catalysts (AREA)
Abstract
The invention provides air purification equipment capable of performing targeted and efficient air purification according to air quality, which comprises a shell, an air inlet and an air outlet, wherein a fan is arranged on the inner side of the air outlet in the shell; three filter screen grooves are arranged between the air inlet and the air outlet; a dust collecting groove is arranged at the bottom of the first filter screen groove, a primary filter screen is arranged in the dust collecting groove, and a cleaning brush is arranged close to the primary filter screen; an HEPA filter screen is arranged in the second filter screen groove; a nanofiber membrane is arranged in the third filter screen groove; two air flow paths are arranged between the third filter screen groove and the air outlet, wherein a photocatalytic purification device is arranged in one air flow path, the photocatalytic purification device comprises an ultraviolet lamp tube and a plurality of glass sheets, and TiO is coated on two surfaces of each glass sheet2A base photocatalyst; the air purification equipment also comprises an air quality detector, and the air quality detector is electrically connected with the air circuit change-over switch and the control end of the ultraviolet lamp tube.
Description
Technical Field
The invention relates to air purification equipment, and belongs to the technical field of air purification.
Background
People spend more than 80% of their time indoors, and the quality of indoor air is directly related to their health. The air purification device is a commonly used air purification mode, and can enable users to breathe cleaner air. The existing air purifying equipment has the following problems: 1. filtration and adsorption are mainly used, but the filtration and adsorption technology only concentrates pollutants into an adsorption material, does not completely eliminate the pollutants and can generate secondary pollution; 2. the filter screen is inconvenient to clean, a large amount of dust is easy to collect inside the filter screen after long-time use, and the filter screen is not beneficial to the health of people after long-time use; 3. the air quality in the room cannot be purified in a targeted manner.
Disclosure of Invention
The invention aims to provide air purification equipment which can perform targeted and efficient air purification according to air quality.
The invention adopts the technical scheme that the invention achieves the aim that: the utility model provides an air purification equipment, includes the casing, air inlet and gas outlet on the casing, its structural feature is: a fan is arranged on the inner side of the air outlet in the shell; three filter screen grooves are arranged between the air inlet and the air outlet, and a first filter screen groove, a second filter screen groove and a third filter screen groove are arranged from the air inlet to the air outlet in sequence; a dust collecting groove is formed in the bottom of the first filter screen groove, a primary filter screen is arranged in the first filter screen groove, a cleaning brush is arranged close to the primary filter screen, the rear end of the cleaning brush is connected with a sliding block, a first motor is electrically connected with the cleaning brush and used for driving the cleaning brush to rotate, an output shaft of a second motor is connected with a lead screw, and the lead screw penetrates through a threaded through hole formed in the sliding block; a HEPA (high Efficiency Particulate filter) filter screen is arranged in the second filter screen groove; a nanofiber membrane is arranged in the third filter screen groove;
two air flow paths are arranged between the third filter screen groove and the air outlet, after the air flow passes through the third filter screen groove, the air flow can selectively pass through one of the two air flow paths through an air flow switch, a photocatalytic purification device is arranged in one air flow path (nothing is arranged in the other air flow path), the photocatalytic purification device comprises an ultraviolet lamp tube and a plurality of glass sheets, the flowing direction of each glass sheet and the air flow is 30-60 degrees, TiO is coated on two surfaces of each glass sheet2A base photocatalyst;
the air purification equipment also comprises an air quality detector, and the air quality detector is electrically connected with the air circuit change-over switch and the control end of the ultraviolet lamp tube.
The working method of the invention is as follows: when the air purification equipment is used, firstly, the air quality detector detects the air quality, the detection result judges whether the air flow passes through the air flow passage provided with the photocatalytic purification device or the air flow passage without the photocatalytic purification device after passing through the third filter screen groove, and then the air flow passage through which the air flow passes is controlled by the control air path change-over switch; meanwhile, whether the ultraviolet lamp tube is opened or not is controlled. Then the fan is started, the fan discharges the air in the shell to the external environment, so that the pressure difference is formed between the interior of the shell and the external environment, so that the air enters the shell from the air inlet and is filtered by the primary filter screen to filter dust with larger diameter in the air, then further filtered by a HEPA filter screen and a nano fiber membrane, thereby realizing the purpose of purifying the air, then discharged from an air outlet, meanwhile, when air is purified, the first motor is started and drives the cleaning brush to rotate, so that the cleaning brush can be in contact with the primary filter screen, so as to clean the primary filter screen conveniently, then the second motor is started, the second motor drives the sliding block to move up and down, therefore, the cleaning brush can clean the surface of the whole primary filter screen, and the dust attached to the surface of the primary filter screen can fall into the dust collecting groove. Can take out primary filter screen, HEPA filter screen, nanofiber membrane from the filter screen groove as required after a period of time, and then can conveniently clear up or change it, this is exactly this air purification equipment's whole use.
Compared with the prior art, the invention has the beneficial effects that:
the filter screen groove is connected with the primary filter screen, the HEPA filter screen and the nanofiber membrane in a detachable structure mode, after the filter screen groove is used for a long time, the primary filter screen, the HEPA filter screen and the nanofiber membrane can be conveniently detached, and then the filter screen groove can be conveniently cleaned or replaced, so that breeding of bacteria can be reduced.
And secondly, the cleaning brush is arranged to clean the surface of the primary filter screen in the using process of the device, so that the dust adhesion is reduced, the device can be used for a longer time, and the cleaning frequency is reduced.
Thirdly, a nanofiber membrane is arranged in the third filter screen groove, and the nanofiber membrane has uniform pore diameter, high porosity and specific surface area, so that more effective contacts are provided between fibers and pollutants in the air, and the filtering efficiency is high; the diameter of the fiber is equivalent to the mean free path of air molecules, and the filtration resistance of the nanofiber membrane is low due to the slippage effect; set up the organic matter that nanofiber membrane is not adsorbed again reducible primary filter screen and HEPA filter screen before photocatalytic purification device, particulate matter and accessory substance contact photocatalyst avoid photocatalyst poisoning, have promoted photocatalyst's catalytic effect and life.
And two air flow passages are arranged between the fourth filter screen groove and the air outlet, so that the air can be purified in a targeted manner, the purification efficiency is high, and the purification effect is good.
Fifthly, the photocatalytic purification device comprises a plurality of glass sheets fixed according to a louver type, the flowing direction of each glass sheet and airflow is 30-60 degrees, and TiO is coated on two surfaces of each glass sheet2A base photocatalyst; the arrangement can ensure low filtering resistance, ensure enough contact area between the photocatalyst and air and simultaneously not influence the photocatalyst to receive light generated by the ultraviolet lamp tube.
The primary filter screen and the HEPA filter screen can adopt various existing filter screens, for example, the primary filter screen can be made of non-woven fabrics, nylon screens or activated carbon, and the HEPA filter screen can be made of PP filter paper, glass fibers, melt-blown polyester non-woven fabrics and melt-blown glass fibers.
Further, the nanofiber membrane is a Polyacrylonitrile (PAN) nanofiber membrane.
PAN has chemical stability and weatherability, is easy to process, and can be prepared by electrostatic spinning.
Furthermore, the polyacrylonitrile nano-fiber membrane is formed by laminating a polyacrylonitrile fiber membrane with the diameter of 50-100nm and a porous polyacrylonitrile fiber membrane with the diameter of 800-1000nm, wherein the mass ratio of the polyacrylonitrile fiber membrane with the diameter of 50-100nm to the porous polyacrylonitrile fiber membrane is 1: 3; the thickness of the polyacrylonitrile nano-fiber membrane is 0.1-0.2 mm.
The nanofiber membrane compounded by the two structures is beneficial to improving the filtration efficiency and reducing the filtration resistance, and the polyacrylonitrile nanofiber membrane is prepared by a method in the prior art, such as alternate spinning preparation through two electrostatic spinning devices.
Further, the TiO of the present invention2The base photocatalyst is Pt-TiO2Catalyst, Ag-TiO2Catalyst, Pt-TiO2-rGO catalyst or Au-TiO2-rGO catalyst.
Pure TiO2As a photocatalytic material, the material has two disadvantages, namely, the recombination rate of photogenerated electrons and holes is high, so that the quantum efficiency is low; second, pure TiO2The forbidden band width of the solar cell is wide, so that the light response range of the solar cell is narrow, and sunlight cannot be effectively utilized; in the present invention, TiO2The light utilized by the base photocatalyst is the light emitted by plasma discharge of the plasma purification component and is used as a light source for photocatalysis; while the light emitted by the air plasma discharge is less in the ultraviolet spectral region, if pure TiO2The photocatalytic material has low catalytic activity, and the photocatalytic purification component has limited air purification effect.
The addition of noble metals Au, Pt and Ag to TiO2Schottky potential energy is formed on the surface, so that the purpose of effectively capturing photo-generated electrons is achieved, and the recombination of the photo-generated electrons and holes is inhibited, so that the photocatalytic activity can be greatly improved. The noble metal has good visible light response due to the surface plasmon resonance effect, can directly absorb visible light in sunlight to generate electron hole pairs, and photo-generated electrons are transferred to TiO2Enabling efficient separation of electron-hole pairs. rGO (reduced graphene oxide) has the advantages of large specific surface area, good conductivity, high carrier mobility and the like, and is compatible with TiO2After the recombination, the specific surface area of the catalyst can be increased to provide more adsorption and catalytic active centers, and the rGO is used as an excellent carrier transfer medium in the photocatalytic reaction process, so that the photo-generated electrons and holes can be effectively reducedCompounding to enhance photocatalytic activity. So that the above TiO2Base photocatalyst is compared with pure TiO2The photocatalyst improves the quantum efficiency, enlarges the photoresponse range, further greatly improves the photocatalytic activity and prolongs the service life.
Further, the TiO of the present invention2The base photocatalyst is Pt-TiO2rGO catalyst from SiO2Pt-TiO prepared for template2-rGO hollow microspheres.
With Pt and rGO to TiO2The doped composition can effectively improve TiO2Quantum efficiency, expanded photoresponse range, and Pt-TiO2the-rGO catalyst has long service life and stable catalytic performance, and adopts a hollow sphere structure because of low density, large specific surface area, good surface permeability and high light absorption efficiency.
Still further, the Pt-TiO of the present invention2The preparation method of the-rGO hollow microspheres comprises the following steps: first, Pt-TiO is prepared2Nanoparticles, then SiO modified with amino groups2The particles are used as a template, GO (graphene oxide) is wrapped on SiO modified by amino through intermolecular force (mainly hydrogen bonds)2Surface, and then the Pt-TiO is subjected to electrostatic action2The nanoparticles are adsorbed on the surface of GO to obtain SiO2-GO-Pt-TiO2A core-shell structure material; subsequent etching to remove SiO from the core2And calcining the crystallized TiO at high temperature under the protection of nitrogen2Reducing GO to obtain Pt-TiO2-rGO hollow microspheres.
The preparation method is simple and easy to operate, GO is adopted firstly, and is subjected to layer-by-layer composite doping and then high-temperature calcination to reduce GO to obtain rGO, so that the problem that the rGO is easy to agglomerate when directly used is avoided, and the oxidized group on the surface of GO is utilized, so that the amino modified SiO is easier to realize2Surface coating and Pt-TiO2Adsorption of nanoparticles, Pt-TiO prepared2the-rGO hollow microsphere has stable structure and good photocatalytic performance. The following list is a preparation of Pt-TiO2-specific method of rGO hollow microspheres, steps are as follows:
S1、Pt-TiO2preparing nano particles: first TiO is added2The nanoparticles are dispersed in a dispersantPreparation of TiO2A nanoparticle dispersion; then adding TiO2Adding the nano-particle dispersion into a chloroplatinic acid solution, fully mixing and carrying out ultrasonic treatment, and then adding NaBH4Solution, in-situ generation of Pt, centrifugal washing to obtain Pt-TiO2A nanoparticle;
S2、Pt-TiO2-rGO hollow microsphere preparation: adding Pt-TiO2Dispersing the nano particles in a dispersing agent to obtain Pt-TiO2A nanoparticle dispersion; preparation of amino-modified SiO2Nano particles, and dispersing in dispersing agent to obtain amino modified SiO2A nanoparticle dispersion; SiO modified at the amino group2Adding the graphene oxide solution into the nano-particle dispersion liquid, and fully stirring and mixing to obtain SiO2-GO sample, centrifuge wash; mixing SiO2-GO sample addition Pt-TiO2Fully mixing and ultrasonically treating the nano-particle dispersion liquid to obtain SiO2-GO-Pt-TiO2Centrifuging and washing a sample; removal of SiO from the core by etching2To obtain GO-Pt-TiO2Washing and drying the hollow microsphere sample; drying GO-Pt-TiO2Placing the hollow microsphere sample in a tube furnace, and carrying out heat treatment at 500-600 ℃ for 4-6h under the protection of nitrogen to obtain the Pt-TiO2-rGO hollow microspheres.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.
Detailed Description
Example one
Fig. 1 shows that one embodiment of the present invention is: the utility model provides an air purification equipment, includes casing 1.0, air inlet 1.1 and gas outlet 1.2 on casing 1.0, its structural feature is: a fan 1.3 is arranged on the inner side of the air outlet 1.2 in the shell 1.0; three filter screen grooves are arranged between the air inlet 1.1 and the air outlet 1.2, and a first filter screen groove 1.3, a second filter screen groove 1.4 and a third filter screen groove 1.5 are arranged in sequence from the air inlet 1.1 to the air outlet 1.2; a dust collecting groove 1.6 is arranged at the bottom of the first filter screen groove 1.3, a primary filter screen 2.1 is arranged in the first filter screen groove 1.3, a cleaning brush 3.1 is arranged close to the primary filter screen 2.1, the rear end of the cleaning brush 3.1 is connected with a sliding block 3.2, a motor I3.3 is electrically connected with the cleaning brush 3.1 and used for driving the cleaning brush 3.1 to rotate, an output shaft of a motor II 3.4 is connected with a screw rod 3.5, and the screw rod 3.5 penetrates through a threaded through hole arranged in the sliding block 3.2; a HEPA filter screen 2.2 is arranged in the second filter screen groove 1.4; a nanofiber membrane 2.3 is arranged in the third filter screen groove 1.5;
two air flow paths are arranged between the third filter screen groove 1.5 and the air outlet 1.2, after the air flow passes through the third filter screen groove 1.5, the air flow can selectively pass through one of the two air flow paths through the air path change-over switch 1.7, wherein a photocatalytic purification device 4.0 is arranged in one air flow path, the photocatalytic purification device 4.0 comprises an ultraviolet lamp tube 4.1 and a plurality of glass sheets 4.2, the flow direction of each glass sheet 4.2 is 30-60 degrees, and TiO is coated on both sides of each glass sheet 4.22A base photocatalyst; the number of the glass sheets 4.2 is determined according to the size of the composite purification module and the size of the glass 4.2, and is generally between 5 and 15, in this case 7; glass sheet 4.2 coated with TiO on both sides2The specific method of the base photocatalyst is as follows: adding TiO into the mixture2Dispersing a base photocatalyst in deionized water to form uniformly dispersed catalyst liquid in a latex state; then, the glass sheets are evenly coated on the two sides of the glass sheet 4.2 and are dried in vacuum or dried;
the air purification equipment further comprises an air quality detector 5.0, and the air quality detector 5.0 is electrically connected with the air circuit switch 1.7 and the control end of the ultraviolet lamp tube 4.1.
When the air purification equipment is used, firstly, the air quality detector 5.0 detects the air quality, and the detection result judges whether the air flow passes through the air flow passage provided with the photocatalytic purification device or the air flow passage without the photocatalytic purification device after passing through the third filter screen groove. As shown in fig. 1, in this embodiment, the air quality detector 5.0 detects that the concentration of vocs (volatile organic compounds) in the air is seriously exceeded, and after the air flow passes through the third filter screen tank, the air flow is controlled by controlling the air path switch to pass through the air flow path provided with the photocatalytic purification device, and at the same time, the ultraviolet lamp tube is controlled to be opened, and the photocatalytic purification device operates. The degree of the air quality can be set by the manufacturer in advance or by the user according to the requirement, and the air flow is required to be controlled to pass through the photocatalytic purification device (the ultraviolet lamp tubes are opened simultaneously).
In the example, the nanofiber membrane 2.3 is a polyacrylonitrile nanofiber membrane; the polyacrylonitrile nano-fiber membrane is formed by laminating a polyacrylonitrile fiber membrane with the diameter of 50-100nm and a porous polyacrylonitrile fiber membrane with the diameter of 800-1000nm, wherein the mass ratio of the polyacrylonitrile fiber membrane with the diameter of 50-100nm to the porous polyacrylonitrile fiber membrane is 1: 3; the thickness of the polyacrylonitrile nano-fiber membrane is 0.1-0.2 mm.
In this example the TiO described2The base photocatalyst is Pt-TiO2rGO catalyst from SiO2Pt-TiO prepared for template2-rGO hollow microspheres.
Pt-TiO as described in this example2The preparation method of the-rGO hollow microspheres comprises the following steps: first, Pt-TiO is prepared2Nanoparticles, then SiO modified with amino groups2The particles are used as a template, and GO is wrapped in SiO modified by amino through intermolecular force2Surface, and then the Pt-TiO is subjected to electrostatic action2The nanoparticles are adsorbed on the surface of GO to obtain SiO2-GO-Pt-TiO2A core-shell structure material; subsequent etching to remove SiO from the core2And calcining the crystallized TiO at high temperature under the protection of nitrogen2Reducing GO to obtain Pt-TiO2-rGO hollow microspheres.
In this example Pt-TiO2The specific steps for preparing the rGO hollow microspheres are as follows:
S1、Pt-TiO2preparing nano particles: firstly, TiO with the grain diameter of 20nm-30nm is added2Preparation of TiO by dispersing nano particles in ethanol2A nanoparticle dispersion; then adding TiO2Adding the nano-particle dispersion into a chloroplatinic acid solution, fully mixing and carrying out ultrasonic treatment, and then carrying out NaBH4And [ AuCl ]4]-The molar ratio is 8:1, under the composite action of mechanical stirring and ultrasound, NaBH is added4The solution was quickly added dropwise to a chloroauric acid solution in an ice-water mixture in TiO2Pt is generated on the surface of the nano particles in situ, and the Pt-TiO is obtained by centrifugal washing2A nanoparticle;
in the above chloroplatinic acid solution, [ AuCl ]4]-Concentration of 3 x 10-4mol/L；
S2、Pt-TiO2-rGO hollow microsphere preparation: adding Pt-TiO2Dispersing the nano particles in ethanol to obtain Pt-TiO2A nanoparticle dispersion; preparation of amino-modified SiO2Nano particles, and dispersing in dispersing agent to obtain amino modified SiO2A nanoparticle dispersion; SiO modified at the amino group2Adding a graphene oxide solution into the nanoparticle dispersion liquid, and refluxing for 1h under magnetic stirring to obtain SiO2-GO sample, centrifuge wash; mixing SiO2-GO sample addition Pt-TiO2In the nano-particle dispersion liquid, performing ultrasonic treatment for 1h to obtain SiO2-GO-Pt-TiO2Centrifuging and washing a sample; removal of SiO from the core by etching2To obtain GO-Pt-TiO2Dispersing a GO-Pt-TiO2 hollow microsphere sample in 20ml of hydrochloric acid solution with the concentration of 0.1mol/L, stirring for 1h, centrifuging, washing and drying; drying GO-Pt-TiO2Placing the hollow microsphere sample in a tube furnace, and carrying out heat treatment at 500-600 ℃ for 4-6h under the protection of nitrogen to obtain the Pt-TiO2-rGO hollow microspheres.
The above amino-modified SiO2The preparation method of the nano-particles comprises the following steps: 3.44ml of tetraethoxysilane is added to a mixed solution of 17.2ml of deionized water, 92ml of ethanol and 2.48ml of ammonia water with continuous stirring, and stirred magnetically at room temperature for 4 hours. After the reaction is finished, collecting the precipitate by a centrifugal separation method, washing the white precipitate for a plurality of times by deionized water and ethanol, then dispersing the precipitate in 40ml of isopropanol, adding 0.3ml of 3-aminopropyltriethoxysilane, refluxing and stirring for 3h, centrifuging and washing; drying at 80 deg.C for 6h to obtain white solid, grinding, and preparing into SiO2The particle size of the nano-particles is 120nm-150 nm.
The graphene oxide solution is obtained by dispersing graphene oxide in ethanol, and the concentration of the graphene oxide solution is 1 mg/ml.
The etching is carried out to remove SiO in the inner core2The method comprises the following steps: dispersing a SiO2-GO-Pt-TiO2 sample in 30ml of water, ultrasonically dispersing for 30min, and adding 10ml of water with the concentration of2.5mol/L NaOH solution, stirring at 90 ℃ for 3h, and etching to remove SiO in inner core2Centrifuging and washing.
Example two
This example is essentially the same as example one, the only difference being that in this example the TiO is described2The base photocatalyst is Pt-TiO2Catalyst, Ag-TiO2Catalysts or Au-TiO2-rGO catalyst.
Au-TiO2Preparation of rGO catalyst can be referred to: yolk @ Shell nanoarchitecture of Au @ r-GO/TiO2Hybrids as Powerful Visible Light Photocatalysts；Pt-TiO2The catalyst can be prepared by referring to A Visible-Light-HarvestingAssembly with a Sulfocalixarene Linker beta dye and a Pt-TiO2Photocatalyst；Ag-TiO2The catalyst can be prepared by referring to In Single Synthesis of Bimetallic Ag/Pt Loaded Single-catalyst Anatase TiO2Hollow Nano-hemispheres and Their Improved Photocatalytic Properties。
Claims (3)
1. The utility model provides an air purification equipment, includes the casing, air inlet and gas outlet on the casing which characterized in that: a fan is arranged on the inner side of the air outlet in the shell; three filter screen grooves are arranged between the air inlet and the air outlet, and a first filter screen groove, a second filter screen groove and a third filter screen groove are arranged from the air inlet to the air outlet in sequence; a dust collecting groove is formed in the bottom of the first filter screen groove, a primary filter screen is arranged in the first filter screen groove, a cleaning brush is arranged close to the primary filter screen, the rear end of the cleaning brush is connected with a sliding block, a first motor is electrically connected with the cleaning brush and used for driving the cleaning brush to rotate, an output shaft of a second motor is connected with a lead screw, and the lead screw penetrates through a threaded through hole formed in the sliding block; an HEPA filter screen is arranged in the second filter screen groove; a nanofiber membrane is arranged in the third filter screen groove;
two air flow passages are arranged between the third filter screen groove and the air outlet, after the air flow passes through the third filter screen groove, one of the two air flow passages can be selected to pass through by the air flow selector switch, wherein a photocatalytic purification device is arranged in one air flow passage, and the photocatalytic purification device is arranged on the other air flow passageThe photocatalytic purification device comprises an ultraviolet lamp tube and a plurality of glass sheets, wherein the flowing direction of each glass sheet and airflow is 30-60 degrees, and TiO is coated on two surfaces of each glass sheet2A base photocatalyst;
the TiO is2The base photocatalyst is Pt-TiO2rGO catalyst from SiO2Pt-TiO prepared for template2-rGO hollow microsphere composition, Pt-TiO2The specific preparation method of the rGO hollow microsphere is as follows:
S1、Pt-TiO2preparing nano particles: first TiO is added2Preparation of TiO by dispersing nano particles in dispersing agent2A nanoparticle dispersion; then adding TiO2Adding the nano-particle dispersion into a chloroplatinic acid solution, fully mixing and carrying out ultrasonic treatment, and then adding NaBH4Solution, in-situ generation of Pt, centrifugal washing to obtain Pt-TiO2A nanoparticle;
S2、Pt-TiO2-rGO hollow microsphere preparation: adding Pt-TiO2Dispersing the nano particles in a dispersing agent to obtain Pt-TiO2A nanoparticle dispersion; preparation of amino-modified SiO2Nano particles, and dispersing in dispersing agent to obtain amino modified SiO2A nanoparticle dispersion; SiO modified at the amino group2Adding the graphene oxide solution into the nano-particle dispersion liquid, and fully stirring and mixing to obtain SiO2-GO sample, centrifuge wash; mixing SiO2-GO sample addition Pt-TiO2Fully mixing and ultrasonically treating the nano-particle dispersion liquid to obtain SiO2-GO-Pt-TiO2Centrifuging and washing a sample; removal of SiO from the core by etching2To obtain GO-Pt-TiO2Washing and drying the hollow microsphere sample; drying GO-Pt-TiO2Placing the hollow microsphere sample in a tube furnace, and carrying out heat treatment at 500-600 ℃ for 4-6h under the protection of nitrogen to obtain the Pt-TiO2-rGO hollow microspheres;
the air purification equipment also comprises an air quality detector, and the air quality detector is electrically connected with the air circuit change-over switch and the control end of the ultraviolet lamp tube.
2. An air cleaning apparatus according to claim 1, characterized in that: the nanofiber membrane is a polyacrylonitrile nanofiber membrane.
3. An air cleaning apparatus according to claim 2, characterized in that: the polyacrylonitrile nano-fiber membrane is formed by laminating a polyacrylonitrile fiber membrane with the diameter of 50-100nm and a porous polyacrylonitrile fiber membrane with the diameter of 800-1000nm, wherein the mass ratio of the polyacrylonitrile fiber membrane with the diameter of 50-100nm to the porous polyacrylonitrile fiber membrane is 1: 3; the thickness of the polyacrylonitrile nano-fiber membrane is 0.1-0.2 mm.
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| CN113685901A (en) * | 2020-05-19 | 2021-11-23 | 宁波奥克斯电气股份有限公司 | Air inlet device and air conditioner |
| FR3110432A1 (en) * | 2020-05-19 | 2021-11-26 | Institut National De Recherche Et De Sécurité (Inrs) | Device for the treatment of air comprising at least one volatile organic compound |
| KR20220038227A (en) * | 2020-09-18 | 2022-03-28 | 삼성전자주식회사 | Photocatalyst filter and electronic device including thereof |
| CN112066484B (en) * | 2020-09-23 | 2022-07-15 | 浙江勇创天涯科技服务有限公司 | Thing networking air purification device |
| CN112963930B (en) * | 2021-03-24 | 2024-04-26 | 苏州恒境环保科技有限公司 | Self-cleaning fresh air purifying device and purifying method thereof |
| CN113587327B (en) * | 2021-08-06 | 2022-02-11 | 三峡高科信息技术有限责任公司 | Intelligent air disinfection and purification machine |
| US20230211039A1 (en) * | 2021-12-31 | 2023-07-06 | Thermo King Llc | Methods and systems for sanitizing air conditioned by a climate control system |
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