CN108295842A - A kind of composite photocatalyst material for air purifier - Google Patents
A kind of composite photocatalyst material for air purifier Download PDFInfo
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- CN108295842A CN108295842A CN201810112315.3A CN201810112315A CN108295842A CN 108295842 A CN108295842 A CN 108295842A CN 201810112315 A CN201810112315 A CN 201810112315A CN 108295842 A CN108295842 A CN 108295842A
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- 239000000463 material Substances 0.000 title claims abstract description 132
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 100
- 239000002131 composite material Substances 0.000 title claims abstract description 39
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 103
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims abstract description 90
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims abstract description 87
- 239000007789 gas Substances 0.000 claims abstract description 65
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 62
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 52
- 230000000505 pernicious effect Effects 0.000 claims abstract description 51
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000006731 degradation reaction Methods 0.000 claims abstract description 40
- 230000015556 catabolic process Effects 0.000 claims abstract description 39
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 25
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229930040373 Paraformaldehyde Natural products 0.000 claims abstract description 16
- 239000002082 metal nanoparticle Substances 0.000 claims abstract description 16
- 229920002866 paraformaldehyde Polymers 0.000 claims abstract description 16
- 230000003197 catalytic effect Effects 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 9
- 238000011068 loading method Methods 0.000 claims abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 18
- 238000004544 sputter deposition Methods 0.000 claims description 18
- 239000003610 charcoal Substances 0.000 claims description 17
- 239000002105 nanoparticle Substances 0.000 claims description 12
- 239000002250 absorbent Substances 0.000 claims description 10
- 230000002745 absorbent Effects 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 235000019441 ethanol Nutrition 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 229910003074 TiCl4 Inorganic materials 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000006555 catalytic reaction Methods 0.000 claims description 4
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 238000003763 carbonization Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000002070 nanowire Substances 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 3
- 239000002006 petroleum coke Substances 0.000 claims description 3
- 238000005477 sputtering target Methods 0.000 claims description 3
- 239000013077 target material Substances 0.000 claims description 3
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 2
- 238000007605 air drying Methods 0.000 claims 1
- 239000008367 deionised water Substances 0.000 claims 1
- 229910021641 deionized water Inorganic materials 0.000 claims 1
- 239000010408 film Substances 0.000 claims 1
- 238000002156 mixing Methods 0.000 claims 1
- 239000005416 organic matter Substances 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- 239000010409 thin film Substances 0.000 claims 1
- 230000010356 wave oscillation Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 7
- 238000001179 sorption measurement Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 4
- 206010028980 Neoplasm Diseases 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 201000011510 cancer Diseases 0.000 description 2
- 229960004424 carbon dioxide Drugs 0.000 description 2
- 239000003575 carbonaceous material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000002242 deionisation method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000002905 metal composite material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000000527 sonication Methods 0.000 description 2
- 108700020462 BRCA2 Proteins 0.000 description 1
- 102000052609 BRCA2 Human genes 0.000 description 1
- 206010071981 BRCA2 gene mutation Diseases 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 101150008921 Brca2 gene Proteins 0.000 description 1
- 230000005971 DNA damage repair Effects 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 241001354471 Pseudobahia Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000002085 irritant Substances 0.000 description 1
- 231100000021 irritant Toxicity 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004630 mental health Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B01J35/39—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- 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
Abstract
The present invention relates to a kind of composite photocatalyst materials for air purifier, and this composite photocatalyst material is by activated carbon, nano-TiO2Photocatalyst material and noble metal are constituted, and this composite photocatalyst material is by loading nano-TiO on the activated carbon2Photocatalyst material, in nano-TiO2Carried noble metal nano particle is constituted on photocatalyst material, and the activated carbon has porous structure.Composite photocatalyst material in the present invention is for catalytic degradation module degradation pernicious gas in air purifier, this composite photocatalyst material proposed by the present invention has these pernicious gas degradation efficiencies of PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC high, preparation process is simple, it is at low cost, can use for a long time and reproducible advantage, for can be achieved in indoor and vehicular air purifier PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC these pernicious gases effective degradation and remove.
Description
Technical field
The invention belongs to air purifier technical field, specifically a kind of composite photocatalyst material for air purifier
And preparation method thereof.
Background technology
With the fast development of China's industry, oil-fired vehicle quantity is continuously increased, various chemical and biological products
Using more and more, forest cover is constantly destroyed, and the ecological environment of human living is worsening.Environmental problem, it is special
One of an important factor for being not atmosphere polluting problem, having become influence mankind's daily life and national economic and social development.Room
Interior and interior air quality is even more closely bound up with the physical and mental health of people.New clothes are repaired the house within doors and new harmful gas in vehicle contains
Amount is particularly acute, and is constituted a serious threat to the health of people, and by taking formaldehyde as an example, it is a kind of colourless gas, can not visually be known
Not, concentration reaches a certain level irritant smell.Formaldehyde can degrade a kind of protein-for inhibiting tumour to generate in human body
BRCA2 albumen destroys DNA damage repair mechanism, and in newest research report, professor Venkitaraman exists the cell of people
In vitro culture is carried out in formaldehyde environment, it is found that formaldehyde can prevent the duplication of DNA, caused DNA chain to be broken in cell, and always
Since, the damage of DNA is considered to the generation close relation with cancer, while formaldehyde destroys the injury repair machine of DNA again
System makes formaldehyde become a high risk factor for inducing cancer.For the people for carrying BRCA2 gene mutations especially " dangerous ".
Removal of the air purifier to pernicious gas is sought help from for indoor and harmful gas in vehicle, people.City at this stage
Most of air purifier mainly uses HEPA/HESA to filter the removal of the particulate matter and pernicious gas of naked eyes None- identified on field
Net and the material that pernicious gas is adsorbed.But with the extension of usage time, the removal to particulate pollutant and pernicious gas
Efficiency can constantly reduce and reach the state of saturation.In use for some time, strainer need to be cleaned, sorbing material is set
The exposure under sunburst makes contained by sorbing material pernicious gas decompose volatilization, if cleaning and exposure are insufficient or not in time,
Not only filtering material can not refilter pernicious gas, but also cause secondary dirt due to the pernicious gas volatilization in filtering material
Dye.Therefore, we there is an urgent need to one kind can long-term, efficient absorption and the indoor toxic, pernicious gas of degradation, and do not generate two
The processing mode of secondary pollution.
There are many mode that removal is harmful to aerosol.It is a kind of length wherein to use activated carbon adsorption, photocatalyst material edman degradation Edman
Phase effective method.Activated carbon is a kind of porous carbon materials, is made of microcrystalline carbon and agraphitic carbon, has highly developed hole
Structure and huge specific surface area, adsorption capacity are strong.Photocatalyst is the general name of the photosemiconductor material with photo-catalysis function, can
With effective degradation of formaldehyde, benzene, toluene, TVOC pollutants, and with efficient extensive antiseptic property, bacterium and fungi can be released
The toxin of releasing decomposes and harmless treatment.Noble metal such as Ag, Pt, Au are attached to photocatalyst material surface, due in noble metal
There are phasmons on surface, can enhance the catalytic degradation efficiency of photocatalyst material.Therefore, although activated carbon specific surface area has
It is sex-limited, reach saturation through absorption after a period of time, but by the continuous harmless treatment of photocatalyst, it can by activated carbon from this
It is biochemical again, meanwhile, the noble metal on photocatalyst material surface enhances the degradation efficiency of photocatalyst material, has further speeded up activity
Adsorption efficiency of the charcoal to pernicious gas.The present invention proposes a kind of activated carbon-photocatalyst-noble metal composite photocatalyst material, solves
These pernicious gas degradation efficiencies of catalytic degradation module PARA FORMALDEHYDE PRILLS(91,95), benzene, toluene, TVOC are low in air purifier, and removal is insufficient
The problem of.
Invention content
The present invention proposes a kind of for degradation of formaldehyde, benzene, dimethylbenzene, toluene, TVOC in indoor and vehicular air purifier
The composite photocatalyst material of these pernicious gases, this composite photocatalyst material PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC these
Pernicious gas has easily absorption, degradation efficiency height, long lifespan, can be recycled, and solves catalytic degradation in existing air purifier
The problem that module is poor to pernicious gas adsorption effect, degradation efficiency is low.
To achieve the above object, used technical solution is as follows：
A kind of composite photocatalyst material for air purifier, this composite photocatalyst material is by activated carbon, nanometer
TiO2Photocatalyst material and noble metal are constituted, and this composite photocatalyst material is by loading nano-TiO on the activated carbon2Light touches
Catalytic material, in nano-TiO2Carried noble metal nano particle is constituted on photocatalyst material, and the activated carbon has porous structure, this
Kind of absorbent charcoal material PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC these pernicious gases have preferable suction-operated, and this work
Property Carbon Materials to photo-generated carrier have good conduction, the nano-TiO2Photocatalyst material is TiO2Film, TiO2It receives
Rice grain or TiO2Nano wire, this nano-TiO2Photocatalyst material is supported on absorbent charcoal material, to the first of activated carbon adsorption
These pernicious gases of aldehyde, benzene, dimethylbenzene, toluene, TVOC are effectively degraded, and CO is degraded to2、H2These innocuous gas of O, your gold
Metal nano-particle is supported on nano-TiO2On photocatalyst material, precious metal surface there are surface phasmon, precious metal surface
Phasmon enhances nano-TiO2Degradation efficiency of the photocatalyst material to pernicious gas.
The above-mentioned composite photocatalyst material for air purifier, specific preparation method are as follows：
Step 1：Activated carbon is prepared, the general raw material for preparing activated carbon is timber, coal, petroleum coke.Work used in the present invention
Property charcoal be prepared for raw material using timber, the size of selected sawdust is 0.84~2.76mm, using it is preceding cleaned with pure water after
Drying is spare for 24 hours under 120 DEG C of temperature conditions, using sawdust spare 30g with 23ml's a concentration of 85% in the present embodiment
H3PO4It is mixed evenly, impregnates 1h, then heating carbonization 12h at a temperature of 120 DEG C, finally in the case where activation temperature is 500 DEG C
60~90min of activation obtains activated carbon.
Step 2：By the HNO of activated carbon 0.5mol/L prepared in step 1330min is boiled, then in deionization
By washing active carbon to neutrality in water, 2h is dried after washing active carbon is clean under the conditions of 120 DEG C, obtains the work of clean drying
Property charcoal sorbing material.
Step 3：Ethyl alcohol is added in beaker：TiCl4Mixed solution, volume ratio is ethyl alcohol：TiCl4=20:1, with super
Sonication 10min makes it be sufficiently mixed uniformly.Constant temperature 2h, makes ethyl alcohol and TiCl in 50 DEG C of water-baths4Fully reaction, is contained
There is TiO2The solution of photocatalyst material.Then to containing TiO2It is added in the solution of photocatalyst material processed in 3g step 2
Activated carbon, then supersonic oscillations 10min, and until solution will evaporate and completely stop under 50 DEG C of temperature conditions.It is dry in air blast
100 DEG C of dry 12h in dry case, in chamber type electric resistance furnace calcine certain time obtain containing TiO2The TiO of film2/ activated carbon is compound
Catalysis material.
Step 4：Using magnetron sputtering apparatus in TiO2TiO in/activated carbon composite photocatalyst material2Photocatalyst material table
Face prepares Pt nano particles, and sputtering target material uses high-purity (99.9%) Pt metal, sputtering instrument base vacuum to be better than 5 × 10-4Pa,
100 DEG C of heating temperature, sputter gas are high-purity helium or high-purity argon gas, and air pressure when sputtering is 1~2Pa, sputtering power 100W
~150W, sputtering time 3s~5s, in TiO2Pt nano particles are prepared in photocatalyst material surface.By controlling sputtering power
And sputtering time, TiO can be controlled2The size of photocatalyst material surface Pt nanoparticle sizes.
The present invention proposes a kind of for degradation of formaldehyde, benzene, dimethylbenzene, toluene, TVOC in indoor and vehicular air purifier
The composite photocatalyst material of these pernicious gases, this composite photocatalyst material have the more of high surface area using activated carbon
These pernicious gases of pore structure PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC have superpower suction-operated, nano-TiO2Photocatalyst
Material PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC these pernicious gases degradation function realize to the effective of these pernicious gases
Removal, the phasmon for being present in noble metal nano particles surface enhance TiO2Photocatalyst material makees the degradation of pernicious gas
With.Absorbent charcoal material effectively adsorbs formaldehyde, benzene, dimethylbenzene, toluene, TVOC these pernicious gases, while nano-TiO2Light touches
These have to being adsorbed on the formaldehyde on absorbent charcoal material surface, benzene, dimethylbenzene, toluene, TVOC for catalytic material and noble metal composite-material
Evil gas is efficiently degraded to water and CO2These free of contamination gases.
The present invention proposes a kind of for degradation of formaldehyde, benzene, dimethylbenzene, toluene, TVOC in indoor and vehicular air purifier
The composite photocatalyst material of these pernicious gases, nano-TiO in this composite photocatalyst material2Photocatalyst material is in energy
Equal to or more than TiO2When light (hv >=Eg) irradiation of band-gap energy, TiO2The energy last transition of Electron absorption photon in valence band (VB)
Higher energy conduction band (CB) is adjourned to, corresponding hole is formed in valence band, these electricity right to generate light induced electron (e-)-hole (h+)
Son and hole can be adsorbed on TiO2The OH or O of material surface2Etc. the generation-OH and O that reacts2Free radical, these freedom
Base has very high activity, the organic pollution adsorbed can be degraded by catalytic to CO2、H2These nontoxic small molecule objects of O
Matter, meanwhile, noble metal nano particles can enhance TiO2Photocatalyst material light induced electron (e-)-hole (h+) to generation, enhancing
TiO2The catalytic degradation efficiency of photocatalyst material.These pernicious gases of activated carbon PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC have
Superpower adsorption capacity, while activated carbon can conductive nano TiO2Light induced electron (e-)-hole (h+) that photocatalyst material generates
It is right, make nano-TiO2It is right that photocatalyst material further generates more light induced electrons (e-)-hole (h+), to make more first
These pernicious gases of aldehyde, benzene, dimethylbenzene, toluene, TVOC are by nano-TiO2Photocatalyst material is degraded, and nano-TiO is improved2Light touches
The degradation efficiency of catalytic material PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC these pernicious gases.
Invention has the beneficial effects that：Composite photocatalyst material in the present invention is for catalytic degradation in air purifier
Module degradation pernicious gas, this composite photocatalyst material proposed by the present invention have PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC
These pernicious gases degradation efficiencies are high, and preparation process is simple, at low cost, can use for a long time and reproducible advantage, are used for
Effective degradation of PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC these pernicious gases can be achieved in indoor and vehicular air purifier
And removal.
Description of the drawings
Fig. 1 is a kind of noble metal/TiO proposed by the present invention2/ activated carbon prepares and degradation pernicious gas schematic diagram.
Specific implementation mode
The specific implementation mode of the present invention is described with reference to embodiment, to be better understood from the present invention.
Embodiment
The present invention proposes a kind of for degradation of formaldehyde, benzene, dimethylbenzene, toluene, TVOC in indoor and vehicular air purifier
The composite photocatalyst material of these pernicious gases, this composite photocatalyst material include activated carbon, nano-TiO2Photocatalyst material
And noble metal nano particles, this composite photocatalyst material by loading nano-TiO on the activated carbon2Photocatalyst material is being received
Rice TiO2Carried noble metal nano particle constitutes composite photocatalyst material on photocatalyst material, and this composite photocatalyst material is to first
These pernicious gases of aldehyde, benzene, dimethylbenzene, toluene, TVOC can effectively degrade, and there is the activated carbon porous structure to be used for first
These pernicious gases of aldehyde, benzene, dimethylbenzene, toluene, TVOC carry out suction-operated, while this absorbent charcoal material also has conduction electricity
The effect in son-hole pair, the nano-TiO2Photocatalyst material is by TiO2Film, TiO2Nano particle, TiO2Nano wire these three
Either these three arbitrary combinations of material kind or these three materials form one of material, this nano-TiO2Photocatalyst
Material is equal to or more than TiO in energy2When light (hv >=Eg) irradiation of band-gap energy, TiO2Electron absorption photon in valence band (VB)
Energy after transit to higher energy conduction band (CB), corresponding hole is formed in valence band, to generate light induced electron (e-)-hole (h+)
It is right, and then realize nano-TiO2These pernicious gases of photocatalyst material PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC are effectively degraded,
The noble metal nano particles are since there are phasmons to enhance TiO on surface2Photocatalyst material light induced electron (e-)-hole (h
+) to generation, further enhance TiO2The catalytic degradation efficiency of photocatalyst material, the activated carbon is to the nano-TiO2Light
The photo-generate electron-hole that catalyst material generates further increases nano-TiO to conducting2Photocatalyst material PARA FORMALDEHYDE PRILLS(91,95), benzene,
The degradation efficiency of dimethylbenzene, toluene, TVOC these pernicious gases.A kind of use is proposed to the present invention with reference to the accompanying drawings and examples
The composite photocatalyst of degradation of formaldehyde, benzene, dimethylbenzene, toluene, TVOC these pernicious gases in indoor and vehicular air purifier
The preparation method of material is described in detail, and sorbing material is absorbent charcoal material, photocatalyst material TiO in embodiment2Film,
Noble metal nano particles are Pt nano particles.
Fig. 1 show a kind of noble metal/TiO proposed by the present invention2The preparation and degradation of/activated carbon composite photocatalyst material
Pernicious gas schematic diagram, including：Activated carbon 1, TiO2Photocatalyst material 2, noble metal nano particles 3, pernicious gas 4, water 5, two
Carbonoxide 6.Specifically degradation step is：Pernicious gas 4 is adsorbed by activated carbon 1, TiO2Photocatalyst material 2 adsorbs activated carbon 1
Pernicious gas 4 is degraded, and noble metal nano particles 3 enhance TiO2Photocatalyst material 2 is to the degradation efficiency of pernicious gas 4, most
Whole pernicious gas 4 is degraded to harmless water 5 and carbon dioxide 6.
Realize that a kind of specific preparation method for composite photocatalyst material that the present embodiment is proposed is as follows：
Step 1：Activated carbon is prepared, the general raw material for preparing activated carbon is timber, coal, petroleum coke.Work used in the present invention
Property charcoal be prepared for raw material using timber, the size of selected sawdust is 0.84~2.76mm, using it is preceding cleaned with pure water after
Drying is spare for 24 hours under 120 DEG C of temperature conditions, using sawdust spare 30g with 23ml's a concentration of 85% in the present embodiment
H3PO4It is mixed evenly, impregnates 1h, then heating carbonization 12h at a temperature of 120 DEG C, finally in the case where activation temperature is 500 DEG C
60~90min of activation obtains activated carbon.
Step 2：By the HNO of activated carbon 0.5mol/L prepared in step 1330min is boiled, then in deionization
By washing active carbon to neutrality in water, 2h is dried after washing active carbon is clean under the conditions of 120 DEG C, obtains the work of clean drying
Property charcoal sorbing material.
Step 3：Ethyl alcohol is added in beaker：TiCl4Mixed solution, volume ratio is ethyl alcohol：TiCl4=20:1, with super
Sonication 10min makes it be sufficiently mixed uniformly.Constant temperature 2h, makes ethyl alcohol and TiCl in 50 DEG C of water-baths4Fully reaction, is contained
There is TiO2The solution of photocatalyst material.Then to containing TiO2It is added in the solution of photocatalyst material processed in 3g step 2
Activated carbon, then supersonic oscillations 10min, and until solution will evaporate and completely stop under 50 DEG C of temperature conditions.It is dry in air blast
100 DEG C of dry 12h in dry case, in chamber type electric resistance furnace calcine certain time obtain containing TiO2The TiO of film2/ activated carbon is compound
Catalysis material.
Step 4：Using magnetron sputtering apparatus in TiO2TiO in/activated carbon composite photocatalyst material2Photocatalyst material table
Face prepares Pt nano particles, and sputtering target material uses high-purity (99.9%) Pt metal, sputtering instrument base vacuum 5 × 10-4Pa hereinafter,
100 DEG C of heating temperature, sputter gas are high-purity helium or high-purity argon gas, and air pressure when sputtering is 1~2Pa, sputtering power 100W
~150W, sputtering time 3s~5s, in TiO2Pt nano particles are prepared in photocatalyst material surface.By controlling sputtering power
And sputtering time, TiO can be controlled2The size of photocatalyst material surface Pt nanoparticle sizes.
A kind of the application TiO claimed is realized by above step2/ activated carbon composite photocatalyst material, it is this
Composite photocatalyst material is used for catalytic degradation module degradation pernicious gas, this complex light proposed by the present invention in air purifier
Catalysis material has these pernicious gas degradation efficiencies of PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC high, and preparation process is simple, at
This is low, can use for a long time and reproducible advantage, for realizing PARA FORMALDEHYDE PRILLS(91,95), benzene, two in indoor and vehicular air purifier
The effective degradation and removal of toluene, toluene, TVOC these pernicious gases.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (2)
1. a kind of composite photocatalyst material for air purifier, it is characterised in that：This composite photocatalyst material is by activity
Charcoal, nano-TiO2Photocatalyst material and noble metal are constituted, and this composite photocatalyst material is by loading nanometer on the activated carbon
TiO2Photocatalyst material, in nano-TiO2Carried noble metal nano particle is constituted on photocatalyst material, and the activated carbon has porous
Structure, this absorbent charcoal material PARA FORMALDEHYDE PRILLS(91,95), benzene, dimethylbenzene, toluene, TVOC these pernicious gases have preferable suction-operated, and
And this absorbent charcoal material has good conduction, the nano-TiO to photo-generated carrier2Photocatalyst material is TiO2It is thin
Film, TiO2Nano particle or TiO2Nano wire, this nano-TiO2Photocatalyst material is supported on absorbent charcoal material, to activated carbon
The formaldehyde of absorption, benzene, dimethylbenzene, toluene, TVOC these pernicious gases are effectively degraded, and CO is degraded to2、H2These innocuous gas of O,
The noble metal nano particles are supported on nano-TiO2On photocatalyst material, there are surfaces etc. from sharp on noble metal nano particles surface
Member, the surface phasmon on noble metal nano particles surface can enhance the generation of photocatalyst material photo-generated carrier, enhance
Nano-TiO2Photocatalyst material is to the degradation efficiency of organic matter pernicious gas, porous structure absorbent charcoal material combination nano-TiO2Light
Catalyst material and noble metal nano particles material collectively form proposed by the present invention this for catalytic degradation in air purifier
The composite photocatalyst material of module.
2. the composite photocatalyst material according to claim 1 for air purifier, it is characterised in that：It is above-mentioned to be used for sky
The composite photocatalyst material of gas purifier, specific preparation method are as follows：
Step 1：Activated carbon is prepared, the general raw material for preparing activated carbon is timber, coal, petroleum coke；Activated carbon used in the present invention
Be prepared for raw material using timber, the size of selected sawdust is 0.84~2.76mm, using it is preceding cleaned with pure water after 120
Drying is spare for 24 hours under DEG C temperature condition, and the H of the spare sawdusts and 23ml a concentration of 85% of 30g is used in the present embodiment3PO4Mixing
Stir evenly, impregnate 1h, then at a temperature of 120 DEG C heating carbonization 12h, finally activation temperature be 500 DEG C at activation 60~
90min obtains activated carbon；
Step 2：By the HNO of activated carbon 0.5mol/L prepared in step 1330min is boiled, then in deionized water
By washing active carbon to neutrality, 2h is dried after washing active carbon is clean under the conditions of 120 DEG C, obtains the activated carbon of clean drying
Sorbing material；
Step 3：Ethyl alcohol is added in beaker：TiCl4Mixed solution, volume ratio is ethyl alcohol：TiCl4=20:1, use ultrasonic wave
Oscillation 10min makes it be sufficiently mixed uniformly；Constant temperature 2h, makes ethyl alcohol and TiCl in 50 DEG C of water-baths4Fully reaction, is contained
TiO2The solution of photocatalyst material；Then to containing TiO2Work processed in 3g step 2 is added in the solution of photocatalyst material
Property charcoal, then supersonic oscillations 10min, and until solution will evaporate and completely stop under 50 DEG C of temperature conditions；In forced air drying
100 DEG C of dry 12h in case, in chamber type electric resistance furnace calcine certain time obtain containing TiO2The TiO of film2/ activated carbon complex light
Catalysis material；
Step 4：Using magnetron sputtering apparatus in TiO2TiO in/activated carbon composite photocatalyst material2Photocatalyst material surface system
Standby Pt nano particles, sputtering target material use high-purity (99.9%) Pt metal, sputtering instrument base vacuum 5 × 10-4Pa is hereinafter, heating
100 DEG C of temperature, sputter gas are high-purity helium or high-purity argon gas, and air pressure when sputtering is 1~2Pa, sputtering power 100W~
150W, sputtering time 3s~5s, in TiO2Pt nano particles are prepared in photocatalyst material surface；By control sputtering power and
Sputtering time can control TiO2The size of photocatalyst material surface Pt nanoparticle sizes.
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| CN110368964A (en) * | 2019-07-31 | 2019-10-25 | 安徽科浦环保科技有限公司 | A kind of preparation method for the composite catalyzing material except TVOC |
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| CN112495448A (en) * | 2020-12-08 | 2021-03-16 | 夏存忠 | Photocatalyst composite material with optical frequency doubling characteristic |
| CN112547130A (en) * | 2020-12-08 | 2021-03-26 | 夏存忠 | Photocatalyst device |
| CN115487796A (en) * | 2022-08-30 | 2022-12-20 | 广东工业大学 | Composite photocatalyst and preparation method and application thereof |
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| CN112253289A (en) * | 2020-10-16 | 2021-01-22 | 贵州黔鳌信息技术有限公司 | Self-luminous photocatalyst structure for vehicle-mounted three-way catalyst and manufacturing method thereof |
| CN112495448A (en) * | 2020-12-08 | 2021-03-16 | 夏存忠 | Photocatalyst composite material with optical frequency doubling characteristic |
| CN112547130A (en) * | 2020-12-08 | 2021-03-26 | 夏存忠 | Photocatalyst device |
| CN115487796A (en) * | 2022-08-30 | 2022-12-20 | 广东工业大学 | Composite photocatalyst and preparation method and application thereof |
| CN115487796B (en) * | 2022-08-30 | 2024-01-26 | 广东工业大学 | Composite photocatalyst and preparation method and application thereof |
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Application publication date: 20180720 |