CN109869827A - A kind of application of nanosized TiO_2 on air cleaner filter screen - Google Patents

Abstract

The invention discloses a kind of application of nanosized TiO_2 on air cleaner filter screen, including aluminum frame, filter screen and protective net, the aluminum frame is aluminium alloy matter bound edge frame, one layer of filter screen and one layer of protective net are fixedly installed in the aluminum frame, the filter screen is the Ni-based net of photocatalyst, the protective net is aluminium alloy matter rhombus net format net, is coated with coating made of TiO2 on the filter screen.Photocatalyst is sprayed on the basis of nickel foam, surrounding aluminum profile edge sealing is then mounted in air purifier and uses, it can play the role of purifying air and antibacterial, antibiotic rate can reach 99.99%, and nontoxic, safe and stable property is good, purification efficiency is higher, and low energy consumption.

Description

A kind of application of nanosized TiO_2 on air cleaner filter screen

Technical field

The present invention relates to air purification fields, and in particular to a kind of nanosized TiO_2 answering on air cleaner filter screen With.

Background technique

With social progress, people have higher demand to the environment and hygiene and health of routine work, life, are guaranteeing Under the premise of indoor thermal comfort, the good indoor air quality Con trolling index important at the another item of air conditioning, meanwhile, More accurate microelectronics production aerospace etc. also proposes requirement to air quality, and thus air purifying process has obtained newly Development and application, become the indispensable part of air conditioning, improve the countermeasuress of air quality: 1) elimination or control room Presence of pollution sources 2) improve fresh air effect 3) room air self-cleaning；

Conventional air purification techniques: the application of 1. filters --- air filter is most common air purity technique, Its air cleaning mechanism is realized by screening, retention, collision, diffusion, suction-operated, to remove the suspension in room air Based on particle.Commonly be physics retaining filter --- by performance be divided into it is thick, in, sub- high, high efficiency particulate air filter, filtrate one As be non-woven fabrics (also referred to as melt-blow nonwoven-polypropylene fibre), polypropylene fibre filter cloth, ultra-fine fibre glass filter paper, polypropylene fibre filter paper, bubble Foam fiber etc. can remove the dust particle of 0.5~5.0um or more, can generate larger resistance to air-flow；2. electrostatic precipitation formula air Clarifier: purification air is carried out with fibrous activated carbon strainer and electrostatic dirt filtrating screen；The principle of absorption type filtering: due to adsorbent Caused by active force between adsorption molecule.Active force is divided into physical absorption power and chemisorption power.Physical absorption is reversible Process can only temporarily stop pollution that cannot eliminate pollution, used filter needs post-processing.Chemisorption is irreversible Process, be volatile materials molecule and adsorbent chemically reactive and generate nonvolatile matter.Active carbon is most common Adsorbent can generate microcellular structure abundant due to special technique, and the micropore that these human eyes can't see can rely on molecule Power adsorbs various harmful gases and fluid molecule, to achieve the purpose that purification.After activated carbon capillary absorption is full, activity Charcoal just loses absorption property, so needing to regularly replace strainer under normal usage；Activated carbon is mostly powdered or particle Shape is cannot be directly used in most cases in various cleaning equipments, it is necessary to and make active carbon that there is certain shapes and support strength, It could use.All effectively to many VOC gas (such as formaldehyde), it need to be generally used in combination with PIA (Al2O3 of dipped KMnO4)； 3. Electrostatic Absorption: since the substances such as virus are adsorbed on the carriers such as dust, bacterium and these carriers often charge more, passing through electret Since electrostatic interaction is adsorbed after body electrostatic material.Common filtrate is such as: surgical mask materials --- polypropylene electret electrostatic mistake Filter material material can remove 0.3um particle, and air electret Electrostatic Absorption method utilizes Electrostatic Absorption, the case where guaranteeing filter effect Under not will increase air drag, economy is high.

The shortcomings that active carbon adsorption technology: active carbon can only be adsorbed temporarily, and be increased with temperature, wind speed, adsorbed Pollutant is possible to separate out, so often to replace filtering material, avoids adsorption saturation；Service life is short；Electrostatic precipitation skill The shortcomings that art: being easy to produce ozone, and only effective to the big particle gases such as particulate matter；

In view of the above deficiencies, need to design and develop a kind of application of nanosized TiO_2 on air cleaner filter screen, Above-mentioned each disadvantage can be supplied.

Summary of the invention

To solve the above problems, the present invention provides a kind of nanosized TiO_2 on air cleaner filter screen Using.

The present invention is achieved through the following technical solutions:

A kind of application of nanosized TiO_2 on air cleaner filter screen, including aluminum frame, filter screen and protection Net, the aluminum frame are aluminium alloy matter bound edge frame, are fixedly installed with one layer of filter screen and one layer in the aluminum frame Protective net, the filter screen are the Ni-based net of photocatalyst, and the protective net is aluminium alloy matter rhombus net format net, on the filter screen It is coated with coating made of TiO2.

Preferably, the density of the filter screen and thickness are respectively 110PPI and 2.5MM.

Preferably, the mesh specification of the protective net is " 6*12 obstructs width 0.8MM, thickness 0.35MM ".

Compared with prior art, the beneficial effects of the present invention are: spraying photocatalyst on the basis of nickel foam, surrounding aluminium profiles Material edge sealing, is then mounted in air purifier and uses, and can play the role of purification air and antibacterial, antibiotic rate can reach 99.99%, and nontoxic, safe and stable property is good, purification efficiency is higher, and low energy consumption.

Detailed description of the invention

Fig. 1 is the schematic diagram of structure of the present invention；

Fig. 2 is the partial enlarged view at A-A of the present invention；

Fig. 3 is size explanation figure at protective net of the present invention.

In figure: 1, aluminum frame；2, filter screen；3, protective net.

Specific embodiment

Present invention is further described in detail with specific embodiment with reference to the accompanying drawing:

As shown in Figure 1-3, a kind of application of nanosized TiO_2 on air cleaner filter screen, including aluminum frame 1, Filter screen 2 and protective net 3, aluminum frame 1 are aluminium alloy matter bound edge frame, are fixedly installed with one layer of filtering in aluminum frame 1 Net 2 and one layer of protective net 3, filter screen 2 are the Ni-based net of photocatalyst, and protective net 3 is aluminium alloy matter rhombus net format net, filter screen 2 On be coated with coating made of TiO2, the density and thickness of filter screen 2 are respectively 110PPI and 2.5MM, the mesh specification of protective net 3 For " 6*12 obstructs width 0.8MM, thickness 0.35MM ".

Working principle: photocatalyst reaction is also in photocatalysis, and briefly photocatalyst is exactly the energy using light in certain medium Upper (such as TiO2) makes pernicious gas decompose reaction, it is based on the band theory of N-type semiconductor, with N-type semiconductor For the chemical reaction of catalyst.Mechanism is that N-type semiconductor is absorbing energy more than or equal to forbidden bandwidth (bandgap energy) After photon (hv), into excited state, the electronics being stimulated in valence band at this time is jumped over forbidden band, into conduction band.Thus in valence band Form photo-induced hole, common N-type semiconductor have the chemical stability of (TiO2, ZnO, Fe2O3, CdS, WO3) wherein TiO2 it is high, Fast light burn into indissoluble, and there is deeper valence-band level, the chemical reaction of some heat absorptions can be made by the surface TiO2 of light radiation It is accomplished.TiO2 is nontoxic again, valence is low, so being widely used in the catalyst of photochemical catalytic oxidation.When wavelength is less than the light of 387nm When irradiating TiO2, since the energy of photon is greater than the width of forbidden band, the electronics in valence band is excited, and forbidden band of jumping over, which enters, to be led Band, while the corresponding hole h+ (claiming photo-induced hole) formed in valence band.H+ has the ability of very strong capture electronics, and conduction band On e- (photoinduced electron) have very high activity, semiconductor surface formed redox system.Moisture in H+, e- and air It reacts to each other with oxygen and generates the hydrogen-oxygen free radical OH with high concentration, various organic matters can be aoxidized and be allowed to mineralising.(such as first Aldehyde can be turned to CO2 and water by TiO2 photocatalytic-oxidation, i.e., make the organic matter degradation small molecule object of macromolecular under the action of OH base Matter and water).

New opplication: light-catalyzed reaction usually carries out at normal temperatures and pressures, since photo-induced hole has strong oxdiative power, so all kinds of Organic poison can be removed.In addition the performance of catalyst is related with its particle size and size, especially when TiO2 is processed into When nano particle, quantum size effect is embodied, the band structure of catalyst tends to higher energy, and conduction band shifts to calibration Current potential, and valence band shifts to more negative potential, with the reduction of particle size, the time required for electrons spread to particle surface is just Shorter, it is just less that compound chance occurs for the electrons and holes caused by the particle of excitation state, also implies that nanocatalyst Particle has stronger redox ability.Thus it is added in various coating using nano TiO 2, coating is (ultraviolet in sunlight Line) under irradiation, carries out solid-gas phase catalysis and remove VOC from air, caused people's extensive concern, interior decoration can be removed Rear toxic gas can be used for sterilizing and sterilize.

The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle It is fixed.

Claims (3)

1. a kind of application of nanosized TiO_2 on air cleaner filter screen, including aluminum frame (1), filter screen (2) and Protective net (3), it is characterised in that: the aluminum frame (1) is aluminium alloy matter bound edge frame, is consolidated in the aluminum frame (1) Dingan County is equipped with one layer of filter screen (2) and one layer of protective net (3), and the filter screen (2) is the Ni-based net of photocatalyst, the protective net (3) it is aluminium alloy matter rhombus net format net, is coated with coating made of TiO2 on the filter screen (2).

2. a kind of application of the nanosized TiO_2 according to claim 1 on air cleaner filter screen, it is characterised in that: The density and thickness of the filter screen (2) are respectively 110PPI and 2.5MM.

3. a kind of application of the nanosized TiO_2 according to claim 1 on air cleaner filter screen, it is characterised in that: The mesh specification of the protective net (3) is " 6*12 obstructs width 0.8MM, thickness 0.35MM ".