CN102784633A

CN102784633A - Preparation method for photocatalyst TiO2 supporter and manufacturing method for photocatalyst air cleaner

Info

Publication number: CN102784633A
Application number: CN2011101266831A
Authority: CN
Inventors: 不公告发明人
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-17
Filing date: 2011-05-17
Publication date: 2012-11-21
Anticipated expiration: 2031-05-17
Also published as: CN102784633B

Abstract

The invention provides a photocatalytic photocatalyst supporter, and a manufacturing method for a photocatalytic photocatalyst air cleaner adopting the supporter as a filter, wherein the photocatalytic photocatalyst supporter has characteristics of fine pores, high film strength, and high activity photoreactivity semiconductor adhesion. According to the photocatalytic photocatalyst supporter, alkyl metal.TiO2 or a nanometer TiO2 sol is subjected to coating, drying, and solidification to form a film on a ceramic porous material of alumina, aluminum silicate, silicon carbide and other fire resistance materials, then firing at a high temperature of 250-700 DEG C is performed to form a finely-porous photocatalyst ceramic film, wherein performing of a lot of laminating is adopted as a characteristic. The anatase crystal TiO2 nanoparticles of the photocatalytic film formed on the surface of the supporter provide antibacterial, odor removing and other purification effects for air or water under an action of light.

Description

Photocatalyst TiO 2The manufacturing that load is held system making method and photocatalyst air purifying machine

The present invention the invention relates to decompose and removes airborne odorous substance, and the photocatalysis photocatalyst load of harmful volatile materials such as organic toxic TVOC etc. is held body.

This load is held body can transform inorganic pollution such as nitrogen oxide, oxysulfide gas harmlessization in the atmosphere, from air, removes.

Photocatalytic photocatalyst TiO is provided ₂Load is held the manufacturing approach that body is the photocatalysis photocatalyst air purifying machine of filter.

Background technology

In general remove the air cleaner that foreign odor material or harmful substance are used now, in case its filter reaches the absorption saturation state, just ineffective, this is well-known.And employed filter is washed the regeneration isoreactivity and is handled also very difficulty owing to reasons such as material fragilities.

Its purification mechanism of traditional air cleaner mainly is to focus on absorption, therefore for the formaldehyde of harmful to human, and benzene, toluene, the organic of TVOC such as xylenes etc. has the capacity of decomposition of pernicious gas extremely low.

Therefore, solve the filter problem of air cleaner, solve the material problem of filter and the formaldehyde that solves harmful to human; Benzene; Toluene, xylenes, the decomposition of organic pernicious gas of TVOC etc. such as removes at problem; Innoxious inorganic nitrogen oxide, the oxysulfide of following motor vehicle exhaust emission in the air, become the important topic that has air cleaning unit transformation, improvement, improvement now.

[means that the present invention deals with problems]

In order to address the above problem; The means that the present invention takes be a kind of alkyl metal cpd at aluminium oxide, alumina silicate is on the porous material of the pottery of refractory materials such as carborundum element; Be coated with worker, drying, freezing film; Burn till through 200-700 ℃ high temperature, form fine porous property film forming, and to hold body through the photocatalytic photocatalyst load of above process several times lamination be characteristic.

Perhaps the photoreactivity semiconductor light-catalyst is an anatase crystal type nano-TiO ₂Neutral aqueous solution is the colloidal sol of characteristic; At aluminium oxide, alumina silicate is on the porous material of the pottery of refractory materials such as carborundum element; Be coated with worker, drying, freezing film; Burn till through 200-700 ℃ high temperature, form fine porous property film forming, and to hold body through the photocatalytic photocatalyst load of above process several times lamination be characteristic.

Moreover, alkyl metal cpd, anatase crystal type nano-TiO ₂Neutral aqueous solution is the colloidal sol of characteristic, on the porous material of pottery, is coated with worker, drying, freezing film, and through burning till, forming fine permeability film is characteristic.

Further photoreactivity is semi-conductive is the film of pore, and plural number time lamination is a characteristic.

Further again, dry behind the spraying application, solidify, burn till on the film of formation, the film that uses the means of dipping to be coated with the worker again, to solidify, burn till the formation lamination is characteristic.

What metal alkyl was at room temperature relatively more stable is metal ether.Can from titanium alkoxide (titanium metal alkoxides), silicon alkoxide, aluminium-alcohol salt, etc. among be chosen as the request items of characteristic 1 photochemical catalyst load hold body.

Nano titanium oxide (TiO ₂) colloidal sol is neutral transparent aqueous solution, for 1 photochemical catalyst load of the request items of characteristic is held body.

Further again, dry behind the spraying application, solidify, burn till on the film of formation, the voidage of ceramic matrix of uses the means of dipping to be coated with the worker again, solidifying, burning till the film of formation lamination is 85% to be characteristic.(see figure 1).

Summary of the invention

Example of the present invention, following example specifies.But be not limited to embodiment.

[embodiment 1]

Utilize the method for spraying, at the how empty body (Al of aluminum silicate ceramic ₂O ₃=76%, SiO ₂=19%, voidage 85%) two sides spraying metal alkyl titanium dioxide (TiO ₂) coating liquid, after carrying out one hour drying about 100 ℃, 450 ℃ are carried out burning till in one hour film forming in firing furnace.Use the same method afterwards, film forming is made photochemical catalyst ceramic filter A-1, TiO once again ₂The about 60g/m of quantity for spray ²Process after the A-1; A-1 flooded in the metal alkyl titanium dioxide coating liquid be coated with the worker; The same with preface after carrying out one hour drying about 100 ℃, 450 ℃ are carried out burning till a film forming in firing furnace, process multi-layered photocatalyst property photocatalyst ceramic filter A-2.

[embodiment 2]

Utilize the method for spraying, at the how empty body (Al of aluminum silicate ceramic ₂O ₃=76%, SiO ₂=19%, voidage 85%) two sides spraying 0.85% (solid content) nano titanium oxide (TiO ₂) neutral aqueous solution collosol coating liquid, after carrying out one hour drying about 100 ℃, 450 ℃ are carried out burning till in one hour film forming in firing furnace.Use the same method afterwards, film forming is made photochemical catalyst ceramic filter B-1 once again.TiO ₂The about 60g/m of quantity for spray ²Process after the B-1, with B-1 at 0.85% (solid content) nano titanium oxide (TiO ₂) flood in the neutral aqueous solution collosol coating liquid and be coated with the worker, the same with preface after carrying out one hour drying about 100 ℃, 450 ℃ are carried out burning till a film forming in firing furnace, process multi-layered photocatalyst property photocatalyst ceramic filter B-2.

[Test Example 1]

Each three sections of photochemical catalyst ceramic filter A that records before utilizing and B, the small air clearing machine is processed in two lift-launchs of UV lamp 10W, is positioned over 4m ³In the laboratory.The filling formaldehyde gas carries out formaldehyde and decomposes residual concentration process mensuration.The result of table 1 shows that filter A reaches 33% through the rate of removing of 90 minutes formaldehyde, and filter B is equally through 90 minutes, and the rate of removing of formaldehyde reaches 94% high de-agglomeration and removes rate.Proof is flooded the technology that is coated with the worker again after spraying application, it is very effective carrying out the multiple stratification processing.

[table 1]

[embodiment 3]

Utilize the method for spraying, at silicon carbide porous body pottery (SiC=67%, Al ₂O ₃=12%, SiO ₂=19%, porosity 85%) two sides spraying metal alkyl titanium dioxide coating liquid, carry out one hour drying about 100 ℃ after, 450 ℃ are carried out burning till in one hour film forming in firing furnace.Afterwards, in the metal alkyl titanium dioxide coating liquid, flood and be coated with the worker, the same with preface about 100 ℃ carry out one hour drying after, 450 ℃ are carried out burning till a film forming in firing furnace, process photocatalytic photocatalyst ceramic filter C.

[Test Example 2]

The preceding photochemical catalyst ceramic filter A that records, B, C and D (paper wasp nest filter), E (aluminium foil amplifier case), F (the aluminum fiber grid are deleted) carries 5 sections UV lamp 20W, processes the small air clearing machine.The filling formaldehyde gas carries out formaldehyde and decomposes residual

Surplus concentration process is measured, and per minute formaldehyde decomposes removes speed unit (ml/min).The result of table 2 shows that the order of decomposing the speed of removing is B, C, and A, D, E, F arranges.And D, E, the F performance is low, and photochemical catalyst ceramic porous article filter of the present invention is very effective for decomposing formaldehyde.

[table 2]

[effect of invention]

The present invention provides to have and enriches the filter that pore property pore and formation have the high activity photosemiconductor photocatalytic photocatalyst film of high-strength membrane, can decompose effectively that to remove airborne be odorant and other harmful substances of representative with formaldehyde.The possibility that is decomposed into of aromatic compounds such as the benzene that is difficult to decompose and toluene particularly is provided, comprises the TVOC countermeasure and hold body in the photochemical catalyst load of the interior depollution of environment.And the photochemical catalyst TiO of fine porous property film forming ₂Load is held the manufacturing approach that body is the photocatalysis air-cleaning machine of filter.

Description of drawings: Fig. 1 is metal alkyl-titanium dioxide (TiO2) figure layer liquid or 0.85% (solid content) nano titanium oxide (TiO2) neutral aqueous solution collosol coating liquid; Through dry behind the spraying application, solidify, burn till on the film of formation, be coated with the worker again with the means of dipping and solidify and burn till the figure that forms photochemical catalyst lamination film.

Claims

1. contain metal alkyl titanium dioxide (TiO ₂) or nano titanium oxide (TiO ₂) colloidal sol, at aluminium oxide, alumina silicate, on the porous material of the pottery of refractory materials such as carborundum element, be coated with attach, dry, solidify the formation film, burn till through 200-700 ℃ high temperature, form the photocatalytic photocatalyst TiO of fine porous property film forming ₂Load is held body.

2. the load of the semi-conductive fine permeability of photoreactivity is held film, and warp several lamination is that the photochemical catalyst load that requires project 1 of characteristic is held body.

3. make metal alkyl or nano titanium oxide (TiO with spraying method or with the method for spraying-dipping ₂) colloidal sol, be coated with attach, dry, form photocatalytic photocatalyst film through high temperature after solidifying, and through technology like this repeatedly the film forming lamination be that the photocatalytic photocatalyst load that requires project 1 and 2 of characteristic is held body.

4. what metal alkyl was at room temperature relatively stable is metal ether, and 1 the photochemical catalyst load that can be chosen as the request items of characteristic among titanium alkoxide, silicon alkoxide, the aluminium-alcohol salt etc. is held body.

5. the photoreactivity semiconductor light-catalyst is an anatase crystal type nano-TiO ₂Neutral aqueous solution is that the photochemical catalyst load that requires project 1 and even project 3 of characteristic is held body.

6. be coated with worker's metal alkyl, the dry photochemical catalyst load that requires project 5 for characteristic is held body about 100 ℃.

7. the metal alkyl after dry, through 200-700 ℃ of sintering temperature by the amorphous anatase crystal type TiO that converts to ₂For the photochemical catalyst load of the 1-3 that requires project of characteristic is held body.

8. the base material of pottery, the void content with 80-90% are that the project 1 of characteristic is held body for the photochemical catalyst load of characteristic.

9. the base material of pottery is an aluminium oxide, alumina silicate, and cordierite matter is that the request items 1 of characteristic is held body for the photocatalytic photocatalyst load of characteristic.

10. the base material of pottery is that carborundum quality is that the photocatalytic photocatalyst load of the request items 1 of characteristic is held body.

11. photocatalytic photocatalyst TiO with project 1 fine porous property film forming ₂Load is held the manufacturing approach that body is the photocatalysis air-cleaning machine of filter.