CN106582265A - Photocatalytic oxidation air purification device and method - Google Patents
Photocatalytic oxidation air purification device and method Download PDFInfo
- Publication number
- CN106582265A CN106582265A CN201611007789.9A CN201611007789A CN106582265A CN 106582265 A CN106582265 A CN 106582265A CN 201611007789 A CN201611007789 A CN 201611007789A CN 106582265 A CN106582265 A CN 106582265A
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- ozone
- air
- module
- formaldehyde
- catalytic oxidation
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Classifications
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- B01D53/323—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00 by electrostatic effects or by high-voltage electric fields
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- B01D2257/93—Toxic compounds not provided for in groups B01D2257/00 - B01D2257/708
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Abstract
The invention provides a photocatalytic oxidation air purification device and method, the photocatalytic oxidation air purification device includes an electrostatic precipitator module, a high-energy ultraviolet light photocatalytic module and a fan, wherein the electrostatic precipitator module is provided with a high voltage electrostatic precipitator; a photocatalyst layer uses an adsorption material as a carrier, titanium dioxide, a manganese oxide and a reducing state precious metal are loaded onto the carrier, the loading amount of the titanium dioxide is 0-60% of the mass of the adsorption material, the loading amount of the manganese oxide is 0.1 to 10% of the mass of the adsorption material; the loading amount of the reducing state precious metal is 0.01-1% of the mass of the adsorption material, by use of the synergistic effect of the electrostatic precipitator module and the high-energy ultraviolet light photocatalytic module for efficient purification of air pollutants, the problems of single air purification function, complex structure, high energy consumption, incomplete degradation, secondary pollution, and the like in the prior art can be solved, and the photocatalytic oxidation air purification device has the advantages of high mineralization rate, complete degradation, high efficiency and stability.
Description
Technical field
The invention belongs to air cleaning facility technical field, more particularly, to a kind of purification of air of photochemical catalytic oxidation
Apparatus and method.
Background technology
The death toll that China is caused by room air pollution every year is up to 11.1 ten thousand people.Under the conditions of summer high-temperature, air
Middle photochemical reaction strengthens, and can produce the secondary pollution of more fine particle；It is and because high humidity, low layer wind speed is little, empty
Pollutant in gas can combine with moisture, and PM2.5 is very easy to accumulation and is difficult diffusion, and " summer haze " is just generated.Phase
Than autumn and winter season, injury of the summer haze to pulmonary can be more serious, because temperature height easily multiplies antibacterial, these antibacterials can be sticked
The respiratory tract of people in aerial little particle, is slipped into quietly, jeopardizes health.This external monitor shows, 2016
" ozone " is aggravating into the number of times of primary pollutant, Canadian occupational health and safety center（CCOHS）Propose, ozone can stimulate
With infringement nasal mucosa and respiratory tract, cause cough uncomfortable in chest, laryngopharynx swelling and pain, asthma.And it is likely to result in decreased lung function, emphysema
And lung injury, and these damages are often unrepairable.Air pollutants are presented compound feature, and pollutant include
Grain thing, gaseous molecular and microbial virus etc..But at present air purifying process single function, limited efficacy, focus primarily upon
Grain thing is removed, and for the more serious gaseous contaminant of harm and infectiousness such as benzene homologues that are carcinogenic, causing a disease and formaldehyde
Pathogenic bacteria lacks effective and economic method and eliminates.As absorption method is only capable of being enriched with and non-degradable part gaseous contaminant, inhale
Cannot work on after attached saturation, and easily breed bacteria.In recent years emerging anion technology is also only capable of removing pellet,
And there is the deficiencies such as high energy consumption and ozonation by-product in plasma technique.Individually UV or ozone technology are common air sterillization sides
Method, but its oxidability is limited, it is impossible to kill many stubborn bacteria viruses and degraded gas molecule pollutant.Additionally, UV is present
Region cannot be irradiated to, and if ozone remnants are not eliminated and can be produced secondary pollution.Be present inherent shortcoming in prior art, realize
The process of combined pollutant is needed with reference to substantial amounts of processing means, complex structure and relatively costly, it is difficult to meet present air
An urgent demand of pollution purification.
The content of the invention
The technical problem to be solved is the drawbacks described above for overcoming prior art to exist, there is provided a kind of photocatalytic-oxidation
The air cleaner of change.
Second object of the present invention is to provide a kind of air purification method of photochemical catalytic oxidation.
The purpose of the present invention is achieved by the following technical programs：
A kind of air cleaner of photochemical catalytic oxidation, successively including electrostatic precipitation module, high energy ultraviolet lamp, photocatalysis module and
Blower fan, the electrostatic precipitation module are provided with high-voltage electrostatic dust separator；The photocatalyst module be with adsorbing material as carrier,
Supported on carriers has titanium dioxide, Mn oxide and reduction-state noble metal, wherein, the load capacity of titanium dioxide is adsorbing material matter
The 0～60% of amount；The load capacity of Mn oxide for adsorbing material quality 0.1～10%；The load capacity of reduction-state noble metal is suction
The 0.01～1% of enclosure material quality, one or two kinds of of the reduction-state noble metal in platinum, palladium, gold, silver, or two kinds
More than.
The photocatalyst layer can pass through photocatalysis, catalytic ozonation, normal-temperature nano catalysis oxidation first at room temperature
Aldehyde, ozone decomposed come the volatile gaseous pollutant such as the benzene homologues in purifying the air of a room, formaldehyde and ozone pollution thing, while killing
Go out antibacterial, virus, and without ultraviolet light and ozone under the conditions of, equally being capable of catalysis oxidation formaldehyde under room temperature.
Preferably, the load capacity of titanium dioxide for adsorbing material quality 10～60%.
Preferably, the preparation method of the photocatalyst layer is comprised the following steps：
（1）Soluble manganese oxide is dissolved in first part of dehydrated alcohol, is added adsorbing material, is sufficiently stirred for；It is subsequently adding metatitanic acid
Four butyl esters, inhibitor and soluble precious-metal presoma, are sufficiently stirred for obtaining solution A；
（2）Second part of dehydrated alcohol is taken, and water mixes to obtain solution B, solution B is instilled and obtain in the solution A being stirred vigorously gel；
（3）By water being re-dissolved in after gel ageing, drying, roasting form suspension；
（4）Add liquid reducing agent to carry out reduction reaction in suspension, the suspension for obtaining is carried out into solid-liquid separation after reaction, will
The scavenging material of gaseous contaminant is obtained final product after solid material drying.
Step（1）Middle soluble manganese oxide is dissolved in dehydrated alcohol, adds adsorbing material, after the step ensure that
The hydrolysis of face Titanium alkoxides are carried out in the uniform level of molecule, step（1）The effect of middle inhibitor is mainly used for alleviating
The hydrolysis rate of Titanium alkoxides, solution B are instilled in solution A so that Titanium alkoxides and water occur hydrolysis, at the same also occur dehydration and
Alcohol polycondensation reaction is lost, product is gathered into the particle of 1nm or so and forms colloidal sol；Step（3）Ageing can cause colloidal sol shape
Become gel into three-dimensional network, drying can remove moisture and organic solvent, and the present invention is mainly also added into liquid later
Reducing agent, the catalyst that reduction-state noble metal after reduction is formed can significantly improve catalytic performance and select performance.
Preferably, step（1）In first part of dehydrated alcohol and the volume ratio of butyl titanate be 2～16：1；The metatitanic acid
Four butyl esters are 5～150 with the volume ratio of inhibitor：1.
Preferably, step（2）In second part of dehydrated alcohol and the volume ratio of water be 1～5：1, second part of ethanol with step
Suddenly（1）The volume ratio of middle butyl titanate is 0.1～4：1.
Preferably, step（1）The soluble manganese oxide selected from manganese acetate, manganese nitrate, the one kind in manganese sulfate or
Two kinds, or it is two or more.
Preferably, step（1）Villaumite or chlorate of the soluble precious-metal presoma for solubility, described suppression
One or two kinds of of the preparation in hydrochloric acid, acetic acid, nitric acid, triethanolamine, acetylacetone,2,4-pentanedione, or it is two or more.
Preferably, step（4）The liquid reducing agent is selected from sodium borohydride, potassium borohydride, hydrazine hydrate, ascorbic acid, first
One or two kinds of in aldehyde, methanol and ethanol, or it is two or more.
Preferably, step（3）Described in Aging Temperature be room temperature, the time be more than 10 hours, when being more preferably aged
Between be 12～15 hours；Described drying temperature is not less than 100 DEG C, more preferably 100～120 DEG C, the time be 10 hours with
On, more preferably 10～12 hours.
Preferably, step（3）Described in sintering temperature be not less than 300 DEG C, more preferably 300～600 DEG C.Time is
More than 2 hours, more preferably 3～5 hours.
Preferably, the adsorbing material is selected from activated carbon, zeolite, carbon fiber, silicon dioxide, activated alumina or carbon molecule
Sieve, the form of adsorbing material are preferably powder, granule, column or cellular.
Preferably, the high energy ultraviolet lamp is the uviol lamp or 185nm uviol lamps of 254nm；When gaseous contaminant it is serious
When prioritizing selection 185nm uviol lamps.
Preferably, electrostatic field high voltage control actuator is additionally provided with the high-voltage electrostatic dust separator, the high-pressure electrostatic is removed
The voltage of dirt device is 3～20kv.
Preferably, the photocatalysis module can arrange independent controlling switch, and be in drawer-type structure, special according to air pollution
Levy, close or take out corresponding module.
The present invention method for carrying out purification of air using the air cleaner of the photochemical catalytic oxidation is also provided, including with
Lower step：
S1. electrostatic precipitation module, particulate matter are entered containing particulate matter, microorganism, ozone, the contaminated air of volatile organic gas
It is charged in corona discharge process when high-voltage electrostatic field, tend to dust collector pole surface and discharge depositing；
S2. moisture in air, oxygen under the forceful electric power field action of corona discharge, the crash response of high energy electron and hydrone,
And excited oxygen produces hydroxyl radical free radical and ozone decomposed pollutant with the charge transfer reaction of hydrone；
S3. amounts of residual contamination is through photocatalysis module, high energy ultraviolet lamp Direct Pyrolysis pollutant, while a certain amount of ozone is produced,
Ozone in ozone that the ozone is produced with high-pressure electrostatic precipitation module and air when photocatalyst layer, in ozone catalytic
CO is mineralized into thoroughly under oxidation, the synergism of ozone-enhanced photochemical catalytic oxidation2And H2O, formaldehyde can also be received by room temperature
Rice catalysis oxidation path is removed.
When pollutants in air is comprising the volatile organic contaminant such as particulate matter, low concentration formaldehyde, benzene homologues, ozone, thin
During various compound pollutant such as bacterium, virus, the side of purification of air is carried out using the air cleaner of the photochemical catalytic oxidation
Method, comprises the following steps：
S1. when high energy ultraviolet lamp is closed, containing particulate matter, microorganism, ozone, volatile organic gas pollution
Air enters electrostatic precipitation module, and particulate matter is when high-voltage electrostatic field, charged in corona discharge process, tends to dust collector pole
Surface and discharge depositing；
S2., under forceful electric power field action of the moisture, oxygen in air in corona discharge, high energy electron is anti-with the collision of hydrone
Should, and the charge transfer reaction generation hydroxyl radical free radical and ozone of excited oxygen and hydrone, it is for oxidation stain thing, described
Ozone and ozone present in air when photocatalyst module by catalytic decomposition into highly reactive form of oxygen free radical and oxygen, to enter
One step oxidation stain material, formaldehyde can also be removed by normal-temperature nano catalysis oxidation path, while residual ozone is complete
Complete utilization and elimination.
When pollutants in air only includes low concentration formaldehyde volatile organic contaminant or formaldehyde and two kinds of ozone is compound
During pollutant, the method for carrying out purification of air using the air cleaner of the photochemical catalytic oxidation is comprised the following steps：
S1., when high-voltage electrostatic dust separator and high energy ultraviolet lamp are closed simultaneously, blower fan is only opened, containing low concentration
Formaldehyde volatile organic contaminant or the contaminated air containing two kinds of compound pollutant of formaldehyde and ozone enter closed mode
Electrostatic precipitation module；
S2., through photocatalysis module, formaldehyde is directly urged by normal-temperature nano under photocatalyst layer effect for ozone and formaldehyde pollutants
Change oxidation and catalytic ozonation, be thoroughly mineralized into CO2、H2O and O2, while ozone is fully used and eliminates.
Compared with prior art, the invention has the advantages that：
The invention provides a kind of air cleaner of photochemical catalytic oxidation, successively including electrostatic precipitation module, high energy ultraviolet lamp,
Photocatalysis module and blower fan, the electrostatic precipitation module are provided with high-voltage electrostatic dust separator；The photocatalyst module is to inhale
Enclosure material is carrier, and supported on carriers has titanium dioxide, Mn oxide and reduction-state noble metal, wherein, the load of titanium dioxide
Measure 0～60% for adsorbing material quality；The load capacity of Mn oxide for adsorbing material quality 0.1～10%；The expensive gold of reduction-state
The load capacity of category for adsorbing material quality 0.01～1%, the reduction-state noble metal selected from platinum, palladium, the one kind in gold, silver or
Two kinds of person, or it is two or more；Cooperateed with using ozone catalytic, photocatalysis and ozone decomposed, formaldehyde normal-temperature nano catalysis oxidation
Effect carrys out high-efficient purification composite air pollutant, solves single conventional air purification function, complex structure, high energy consumption, degrades
Not thoroughly, there are secondary pollution problems, make full use of the efficient mineralization of catalytic ozonation to act on, it is to avoid the wave of ozone resource
Take, have the advantages that low simple structure, efficient stable, energy consumption, non-secondary pollution, detergent power are strong, the device is dirty according to air
Dye species, concentration level, simple to operate, service ability has controllability, can be widely applied to for indoor air purification
Field and industrial organic exhaust gas field.
The method that purification of air is carried out using described device, solves high-voltage electrostatic dust separator ozonation by-product potential risk
The problems such as, while the waste in avoiding air with ozonation by-product resource in high-voltage electrostatic dust separator；Using electrostatic ozone catalytic
The multiple-effect of cooperative photocatalysis, the light degradation of efficient utilization vacuum UV lamp, photocatalysis, free radical and ozone oxidation, formaldehyde
The synergism of normal-temperature nano catalysis oxidation, catalytic ozonation and decomposition, mineralization rate is high, degraded is thorough, efficient stable.
Description of the drawings
Fig. 1 is 6 described device structural representation of embodiment.
Description of reference numerals：1- electrostatic precipitation modules；2- high energy ultraviolet lamps；3- photocatalysis modules；4- blower fans.
Specific embodiment
Further illustrate present disclosure below in conjunction with Figure of description and specific embodiment, but should not be construed as it is right
The restriction of the present invention.In the case of spirit of the invention and essence, the modification made by the inventive method, step, condition
Or replace, belong to the scope of the present invention.Unless otherwise noted, experimental technique used in embodiment is people in the art
Conventional method and technology known to member, reagent or material are and are obtained by commercial sources.
1 0.1%Pt-0.1%MnO-40%TiO of embodiment2-AC（T400）
A kind of material for air purification of gaseous contaminant, with activated carbon as carrier, other components account for adsorbing material by mass fraction
Contain：Titanium dioxide 40%；Manganese oxide 0.1%；Platinum 0.1%.
Concrete preparation process is as follows：0.0134g manganese acetates are dissolved in 15mL dehydrated alcohol, 3g activated carbons are subsequently adding,
It is sufficiently stirred for；Add 2.5mL butyl titanates, 0.1mL concentrated hydrochloric acid, 0.05mL acetylacetone,2,4-pentanediones, 1.5375mL, 0.01M chloroplatinic acid
Solution, is sufficiently stirred for, and is designated as solution A；Take 1mL dehydrated alcohol and 0.7mL pure water is mixed and made into B solution；Play is gradually dropped by B molten
The solution A of strong stirring, stirs to gel state；The material of above-mentioned gained is aged into 12h at normal temperatures, is then dried at 120 DEG C
11h.The material of drying is put into into Muffle furnace, in 400 DEG C of roastings 3 hours.Then material is made into suspension, adds sodium borohydride
Reduction, after solid-liquid separation, dries 6 hours in 100 DEG C, obtains -0.1% -40% titanium dioxide of manganese oxide of 0.1% platinum-activated carbon multiple
Close catalyst（Catalyst 1, is designated as T400）.
2 0.1%Pt-1%MnO-60%TiO of embodiment2-AC（T600）
It is a kind of except the material for air purification of gaseous contaminant, with activated carbon as carrier, other components account for adsorbing material by quality point
Number contains：Titanium dioxide 60%；Manganese oxide 1%；Platinum 0.1%.
Concrete preparation process is as follows：0.1338g manganese acetates are dissolved in 19mL dehydrated alcohol, 3g powder activities are subsequently adding
Charcoal, is sufficiently stirred for；Add 7.2mL butyl titanates, 0.1mL concentrated hydrochloric acid, 0.05mL acetylacetone,2,4-pentanediones, 1.5375mL molar concentrations are
0.01mol/L platinum acid chloride solutions, are sufficiently stirred for, and are designated as solution A；Take 1mL dehydrated alcohol and 1mL pure water is mixed and made into B solution；Will
The molten gradually drops of B enter the solution A being stirred vigorously, and stir to gel state；The material of above-mentioned gained is aged into 14h at normal temperatures,
Then 12h is dried at 120 DEG C.The material of drying is put into into Muffle furnace, in 600 DEG C of roastings 3 hours.Then material is made suspended
Liquid, adds potassium borohydride reduction, after solid-liquid separation, dries 8 hours, obtain -60% dioxy of -1% manganese oxide of 0.1% platinum in 100 DEG C
Change titanium-activated carbon composite catalyst（Catalyst 2, is designated as T600）.
3 0.5%Pd-0.1%MnO-20%TiO of embodiment2- zeolite（T500）
It is a kind of except the material for air purification of gaseous contaminant, with zeolite as carrier, other components account for adsorbing material by mass fraction
Contain：Titanium dioxide 20%；Manganese oxide 0.1%；Palladium 0.5%.
Concrete preparation process is as follows：0.0134g manganese acetates are dissolved in 15mL dehydrated alcohol, 3g zeolites are subsequently adding, are filled
Divide stirring；2.6mL butyl titanates are added, 0.1mL concentrated hydrochloric acid, 0.05mL acetylacetone,2,4-pentanediones, 6.3mL, 0.0242M Palladous chloride. are water-soluble
Liquid, is sufficiently stirred for, and is designated as solution A；Take 1mL dehydrated alcohol and 0.7mL pure water is mixed and made into B solution；By B solution, gradually drop enters
The solution A being stirred vigorously, stirs to gel state；The material of above-mentioned gained is aged into 12h at normal temperatures, is then dried at 120 DEG C
Dry 10h.The material of drying is put into into Muffle furnace, in 500 DEG C of roastings 4 hours, material suspension is made into then, is added hydrazine hydrate
Reduction, after solid-liquid separation, dries 6 hours in 110 DEG C, obtains -0.1% -20% titanium dioxide of manganese oxide of 0.5% palladium-zeolite and is combined
Catalyst（Catalyst 3, is designated as T500）.
4 1%Au-2%MnO-30%TiO of embodiment2- carbon molecular sieve（T300）
It is a kind of except the material for air purification of gaseous contaminant, with carbon molecular sieve as carrier, other components account for adsorbing material by quality
Fraction contains：Titanium dioxide 30%；Manganese oxide 2%；Gold 1%.
Concrete preparation process is as follows：0.2677g manganese acetates are dissolved in 15mL dehydrated alcohol, 3g carbon molecules are subsequently adding
Sieve, is sufficiently stirred for；Add 3.85mL butyl titanates, 0.1mL concentrated hydrochloric acid, 0.05mL acetylacetone,2,4-pentanediones, 15.15mL, 0.01M chlorine gold
Aqueous acid, is sufficiently stirred for, and is designated as solution A；Take 1mL dehydrated alcohol and 1mL pure water is mixed and made into B solution；By B molten gradually drop
Enter the solution A being stirred vigorously, stir to gel state；The material of above-mentioned gained is aged into 13h at normal temperatures, then at 120 DEG C
Drying 11h.The material of drying is put into into Muffle furnace, in 300 DEG C of roastings 4 hours, material suspension is made into then, is added formaldehyde
Aqueous solution is reduced, and after solid-liquid separation, is dried 10 hours in 120 DEG C, is obtained -2% -30% titanium dioxide of manganese oxide of 1% gold medal-carbon point
Son sieve composite catalyst（Catalyst 4, is designated as T300）.
5 UV+ photocatalysts of embodiment
The catalyst that embodiment 1 to embodiment 4 is prepared is used cooperatively with 185nm uviol lamps, is constituted photocatalytic system, is carried
The efficiency of high degraded gaseous contaminant.
Comparative example 1
It is a kind of except the material for air purification of gaseous contaminant, with zeolite as carrier, other components account for adsorbing material by mass fraction
Contain：Manganese oxide 0.1%.
Concrete preparation process is as follows：Deionized water dissolves 0.0134g manganese acetate presomas, under stirring, forward
3g zeolites are poured in driving liquid solution so as in slurry condition, and impregnate 12 h under agitation；In 100 DEG C of bar of baking oven
Part, is dried, and keeps 12h, moisture therein is fully evaporated；Dry catalyst is placed in into Muffle furnace, is roasted at 550 DEG C
Burn 3h.
The catalyst and activated carbon that embodiment 1 to embodiment 5 and comparative example 1 are prepared carries out activity rating.Urge
Glass pipe reactor of the performance test of agent in continuous flowing（Caliber 8mm）On carry out, photocatalysis test outside reactor
Place two 4W uviol lamps.The catalyst granules for choosing 20～40 mesh 1g carries out performance evaluation.Charge flow rate is 1L/min, indoor
Ozone concentration be 90～200ppb, in mixed gas concentration of formaldehyde be 10ppm, benzene concentration 20ppm, toluene concentration 20ppm.Reaction
Device exports concentration of formaldehyde Formaldehyde analyzer（PPM-400, PPM companies of Britain）, benzene and toluene concentration gas chromatogram（GC-
9790 plus, Chinese good fortune stand）, ozone concentration detection ozone analyzer（Power ＆ light company of model49i, the ppb U.S.）.Test
As a result it is as shown in table 1.As can be seen from Table 1, in room temperature without under the conditions of ultraviolet, the conversion ratio of formaldehyde>85%（Catalysis oxidation is CO2With
Water）, benzene is removed and toluene removal is based on Adsorption, and is constantly to decay.After coordinating uviol lamp use, formaldehyde is removed
Rate maintains more than 88%, and the clearance long-time stable of benzene maintains more than 80%, and the clearance of toluene is up to more than 85%.Cause
This, the catalyst obtained by the present invention has good clean-up effect to gaseous contaminant.
Comparative example 2
The concrete preparation process of the catalyst of this comparative example is as follows：In 15mL dehydrated alcohol, then 0.2677g manganese acetates are dissolved in
3g carbon molecular sieves are added, is sufficiently stirred for；Addition 3.85mL butyl titanates, 0.1mL concentrated hydrochloric acid, 0.05mL acetylacetone,2,4-pentanediones,
15.15mL, 0.01M aqueous solution of chloraurate, is sufficiently stirred for, and is designated as solution A；Take 1mL dehydrated alcohol and 1mL pure water is mixed and made into B
Solution；B molten gradually drop is entered the solution A being stirred vigorously, is stirred to gel state；Will be the material of above-mentioned gained old at normal temperatures
Change 13h, then 11h is dried at 120 DEG C.The material of drying is put into into Muffle furnace, is obtained final product within 4 hours in 300 DEG C of roastings.
The catalyst obtained using this comparative example carries out activity rating, and ibid, its result shows for evaluation methodology：Oxidation state
Composite catalyst is basic to the degradation property of benzene, toluene and embodiment 4 maintains an equal level, but the clearance of formaldehyde drastically declines, as little as
41%。
Comparative example 3
The concrete preparation process of the catalyst of this comparative example is as follows：0.1338g manganese acetates are dissolved in 19mL dehydrated alcohol, fully
Stirring；Add 7.2mL butyl titanates, 0.1mL concentrated hydrochloric acid, 0.05mL acetylacetone,2,4-pentanediones, 1.5375mL molar concentrations are
0.01mol/L platinum acid chloride solutions, are sufficiently stirred for, and are designated as solution A；Take 1mL dehydrated alcohol and 1mL pure water is mixed and made into B solution；Will
The molten gradually drops of B enter the solution A being stirred vigorously, and stir to gel state；Then 3g activated carbons are added into colloidal sol.By above-mentioned gained
Material be aged 14h at normal temperatures, then 120 DEG C dry 12h.The material of drying is put into into Muffle furnace, in 600 DEG C of roastings 3
Hour.Then material is made into suspension, adds potassium borohydride reduction, after solid-liquid separation, dried 8 hours in 100 DEG C, obtain
Composite catalyst, as a result finds：Adsorbing material is added after forming colloidal sol, causes adsorbing material and other components load uneven
Even, it is easy to come off, there is no significant change, its absorption property and load type titania catalysis oxidation in Surface Groups of Active Carbons
Synergism can not be formed, therefore its degradation property is greatly reduced.
Comparative example 4
The concrete preparation process of the catalyst of this comparative example is as follows：In 19mL dehydrated alcohol, then 0.1338g manganese acetates are dissolved in
3g Powdered Activated Carbons are added, is sufficiently stirred for；Addition 7.2mL butyl titanates, 0.1mL concentrated hydrochloric acid, 0.05mL acetylacetone,2,4-pentanediones,
1.5375mL molar concentrations are 0.01mol/L platinum acid chloride solutions, are sufficiently stirred for, are designated as solution A；Take 1mL dehydrated alcohol, 1mL pure
Water and potassium borohydride aqueous solution make B solution；B molten gradually drop is entered the solution A being stirred vigorously, is stirred to gel
State；The material of above-mentioned gained is aged into 14h at normal temperatures, then 12h is dried at 120 DEG C.The material of drying is put into into Muffle furnace,
Composite catalyst is obtained within 3 hours in 600 DEG C of roastings, as a result find：Substantially, granule becomes big to obtained catalyst agglomeration phenomenon, than
Surface area diminishes, and causes Catalyst Adsorption performance to be greatly reduced, and the catalysis oxidation ability on composite catalyst surface also declines.
The air cleaner of 6 photochemical catalytic oxidation of embodiment
As shown in figure 1, the device includes electrostatic precipitation module 1, high energy ultraviolet lamp 2, photocatalysis module 3 successively from the left side to the right
With blower fan 4, the electrostatic precipitation module 1 is provided with high-voltage electrostatic dust separator；High energy ultraviolet lamp 2 described in the present embodiment is 254nm
Uviol lamp or 185nm uviol lamps, the prioritizing selection 185nm uviol lamps when gaseous contaminant is serious.
Photocatalyst layer described in the present embodiment is 1～4 preparation-obtained catalyst of embodiment.
The method that embodiment 7 carries out purification of air using 6 described device of embodiment
When pollutants in air comprising the volatile organic contaminant such as particulate matter, higher concentration formaldehyde, benzene homologues, ozone, antibacterial,
During various compound pollutant such as virus, the air purification method of photochemical catalytic oxidation is carried out using Fig. 1 described devices, including it is as follows
Step：
S1. the contaminated air containing particulate matter, microorganism, ozone, volatile organic gas enters electrostatic precipitation module 1, particulate matter
It is charged in corona discharge process when high-voltage electrostatic field, tend to dust collector pole surface and discharge depositing；
S2. moisture in air, oxygen under the forceful electric power field action of corona discharge, the crash response of high energy electron and hydrone,
And excited oxygen produces hydroxyl radical free radical and ozone decomposed pollutant with the charge transfer reaction of hydrone；
S3. amounts of residual contamination is through photocatalysis module 3,2 Direct Pyrolysis pollutant of high energy ultraviolet lamp, while producing a certain amount of smelly
Ozone in oxygen, ozone that the ozone is produced with high-pressure electrostatic precipitation module and air when photocatalyst layer, in ozone
CO is mineralized into thoroughly under catalysis oxidation, the synergism of ozone-enhanced photochemical catalytic oxidation2And H2O, formaldehyde can also be by normal
Winner rice catalysis oxidation path is removed.
The method that embodiment 8 carries out purification of air using 6 described device of embodiment
When pollutants in air is comprising volatile organic contaminant, ozone, antibacterial, diseases such as particulate matter, low concentration formaldehyde, benzene homologues
During various compound pollutant such as poison, the air for carrying out the oxidation of electrostatic ozone catalytic cooperative photocatalysis using Fig. 1 described devices is net
Change method, comprises the steps：
S1. when high energy ultraviolet lamp is closed, containing particulate matter, microorganism, ozone, volatile organic gas pollution
Air enters electrostatic precipitation module 1, and particulate matter is when high-voltage electrostatic field, charged in corona discharge process, tends to gather dust
The surface of pole and discharge depositing；
S2., under forceful electric power field action of the moisture, oxygen in air in corona discharge, high energy electron is anti-with the collision of hydrone
Should, and the charge transfer reaction generation hydroxyl radical free radical and ozone of excited oxygen and hydrone, it is for oxidation stain thing, described
Ozone and ozone present in air when photocatalyst module 3 by catalytic decomposition into highly reactive form of oxygen free radical and oxygen, with
Further oxidation stain material, formaldehyde can also be removed by normal-temperature nano catalysis oxidation path, while residual ozone quilt
Utilize completely and eliminate.
The method that embodiment 9 carries out purification of air using 6 described device of embodiment
When pollutants in air only includes the two kinds of compound pollutions of low concentration formaldehyde volatile organic contaminant or formaldehyde and ozone
During thing, the air purification method of photochemical catalytic oxidation is carried out using Fig. 1 described devices, is comprised the steps：
S1., when high-voltage electrostatic dust separator and high energy ultraviolet lamp 2 are closed simultaneously, blower fan 4 is only opened, containing low dense
Degree formaldehyde volatile organic contaminant or the contaminated air containing two kinds of compound pollutant of formaldehyde and ozone enter closed mode
Electrostatic precipitation module 1；
S2., through photocatalysis module 3, formaldehyde is under photocatalyst layer effect directly by normal-temperature nano for ozone and formaldehyde pollutants
Catalysis oxidation and catalytic ozonation, are thoroughly mineralized into CO2、H2O and O2, while ozone is fully used and eliminates.
Claims (9)
1. a kind of air cleaner of photochemical catalytic oxidation, it is characterised in that successively including electrostatic precipitation module（1）, high energy it is purple
Outer lamp（2）, photocatalysis module（3）And blower fan（4）, the electrostatic precipitation module（1）It is provided with high-voltage electrostatic dust separator；The light
Catalytic module（3）It is that, with adsorbing material as carrier, supported on carriers has titanium dioxide, Mn oxide and reduction-state noble metal, its
In, the load capacity of titanium dioxide is the 0～60% of adsorbing material quality；The load capacity of Mn oxide for adsorbing material quality 0.1
～10%；The load capacity of reduction-state noble metal for adsorbing material quality 0.01～1%, the reduction-state noble metal selected from platinum, palladium,
One or two kinds of in gold, silver, or it is two or more.
2. the air cleaner of photochemical catalytic oxidation according to claim 1, it is characterised in that the photocatalyst layer
Preparation method is comprised the following steps：
（1）Soluble manganese oxide is dissolved in first part of dehydrated alcohol, is added adsorbing material, is sufficiently stirred for；It is subsequently adding metatitanic acid
Four butyl esters, inhibitor and soluble precious-metal presoma, are sufficiently stirred for obtaining solution A；
（2）Second part of dehydrated alcohol is taken, and water mixes to obtain solution B, solution B is instilled and obtain in the solution A being stirred vigorously gel；
（3）By water being re-dissolved in after gel ageing, drying, roasting form suspension；
（4）Add liquid reducing agent to carry out reduction reaction in suspension, the suspension for obtaining is carried out into solid-liquid separation after reaction, will
The scavenging material of gaseous contaminant is obtained final product after solid material drying.
3. the air cleaner of photochemical catalytic oxidation according to claim 2, it is characterised in that step（1）In first part
Dehydrated alcohol is 2～16 with the volume ratio of butyl titanate：1；The butyl titanate is 5～150 with the volume ratio of inhibitor：
1。
4. the air cleaner of photochemical catalytic oxidation according to claim 2, it is characterised in that step（2）In second part of nothing
Water-ethanol is 1～5 with the volume ratio of water：1, second part of ethanol and step（1）The volume ratio of middle butyl titanate be 0.1～
4：1.
5. the air cleaner of photochemical catalytic oxidation according to claim 1, it is characterised in that the high energy ultraviolet lamp
（2）It is the uviol lamp or 185nm uviol lamps of 254nm.
6. the air cleaner of photochemical catalytic oxidation according to claim 1, it is characterised in that the high-pressure electrostatic precipitation
The voltage of device is 3～20kv.
7. the method for carrying out purification of air using the air cleaner of photochemical catalytic oxidation described in any one of claim 1 to 6, its
It is characterised by, comprises the following steps：
S1. electrostatic precipitation module is entered containing particulate matter, microorganism, ozone, the contaminated air of volatile organic gas（1）, granule
Thing is charged in corona discharge process when high-voltage electrostatic field, tend to dust collector pole surface and discharge depositing；
S2. moisture in air, oxygen under the forceful electric power field action of corona discharge, the crash response of high energy electron and hydrone,
And excited oxygen produces hydroxyl radical free radical and ozone decomposed pollutant with the charge transfer reaction of hydrone；
S3. amounts of residual contamination is through photocatalysis module（3）, high energy ultraviolet lamp（2）Direct Pyrolysis pollutant, while producing certain
Amount ozone, the ozone in ozone that the ozone is produced with high-pressure electrostatic precipitation module and air when photocatalyst layer,
CO is mineralized into thoroughly under catalytic ozonation, the synergism of ozone-enhanced photochemical catalytic oxidation2And H2O, formaldehyde can also lead to
Cross normal-temperature nano catalysis oxidation path to be removed.
8. the method for carrying out purification of air using the air cleaner of photochemical catalytic oxidation described in any one of claim 1 to 6, its
It is characterised by, comprises the following steps：
S1. when high energy ultraviolet lamp is closed, containing particulate matter, microorganism, ozone, volatile organic gas pollution
Air enters electrostatic precipitation module（1）, particulate matter is when high-voltage electrostatic field, charged in corona discharge process, tends to receive
The surface of dirt pole and discharge depositing；
S2., under forceful electric power field action of the moisture, oxygen in air in corona discharge, high energy electron is anti-with the collision of hydrone
Should, and the charge transfer reaction generation hydroxyl radical free radical and ozone of excited oxygen and hydrone, it is for oxidation stain thing, described
Present in ozone and air, ozone is through photocatalyst module（3）When by catalytic decomposition into highly reactive form of oxygen free radical and oxygen,
With further oxidation stain material, formaldehyde can also be removed by normal-temperature nano catalysis oxidation path, while residual ozone
It is fully used and eliminates.
9. the method for carrying out purification of air using the air cleaner of photochemical catalytic oxidation described in any one of claim 1 to 6, its
It is characterised by, comprises the following steps：
S1. when high-voltage electrostatic dust separator and high energy ultraviolet lamp（2）When being closed simultaneously, blower fan is only opened（4）, contain
Low concentration formaldehyde volatile organic contaminant or the contaminated air containing two kinds of compound pollutant of formaldehyde and ozone are entered closes
The electrostatic precipitation module of state（1）；
S2. ozone and formaldehyde pollutants are through photocatalysis module（3）, formaldehyde photocatalyst layer effect under directly received by room temperature
Rice catalysis oxidation and catalytic ozonation, are thoroughly mineralized into CO2、H2O and O2, while ozone is fully used and eliminates.
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| CN115279487A (en) * | 2019-12-27 | 2022-11-01 | 卡利斯塔尔简易股份公司 | Method for manufacturing a photocatalytic device, photocatalytic composition and gas decontamination apparatus |
| CN111545047A (en) * | 2020-04-29 | 2020-08-18 | 江苏卓高环保科技有限公司 | Formaldehyde-removing, deodorizing and sterilizing integrated material and application thereof in deodorizing purifier |
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Application publication date: 20170426 |