CN107398138B - A kind of photocatalysis gray haze abatement agent and preparation method thereof - Google Patents
A kind of photocatalysis gray haze abatement agent and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of dopen Nano TiO of visible photoactivation2/Fe2O3/Al2O3/SiO2Gray haze abatement agent and preparation method thereof as main component, is made of Electrostatic Absorption agent, chemical settling agent, photochemical catalyst, stabilizing agentof sol, organo-silicon coupling agent and solvent.The mass percentage concentration of product solid active principle is 0.5%-5%, and solid active principle dosage is 0.05-1.0 g/m when cutting down gray haze application in air3Gray haze air can be sprayed directly in air containing gray haze, can also be pre-coated on the structures surface of ground, and in the test under solar irradiation, gray haze cut rate is 60%-80% in 2h.The present invention overcomes existing photocatalysis gray haze abatement products to the defect of gray haze particle-trapping capabilities difference, and products material is cheap and easy to get, preparation process simplicity and at low cost, easy industrialization and application.
Description
Technical field
The present invention relates to a kind of photocatalysis gray haze abatement agent and preparation method thereof, are especially received with the doping of visible photoactivation
Rice TiO2/ Fe2O3/Al2O3/SiO2Gray haze abatement agent and preparation method thereof as main component, can be sprayed directly on containing ash
It in the air of haze or is coated on the structures surface of ground for indoor and outdoor gray haze abatement, belongs to environmental protection and field of new materials.
Background technique
In recent years, both there is Trans-Provincial/Municipal, gray haze a wide range of, seasonality is strong, the duration is short in China, also occurred
Local, small range, normalization, duration very long gray haze.There are many inorganic compounds and organic for the enrichment of gray haze particulate matter
Compound, these compounds are adsorbed on the very thin solids of aerosol.Mainly there is the more chemical component of content in gray haze
Sulfate, nitrate, ammonium salt, five kinds of ingredients of organic carbon and elemental carbon, the composition of various regions gray haze is different, and gentle with season
As condition is varied.
Atmosphere solid particulate matter PM is usually divided into PM by thickness10、PM2.5And PM1.0Several, the partial size of gray haze is generally
0.003-10 μm, average diameter is at 0.3-1 μm.Research finds that partial size in 2.5 μm of atmosphere fine graineds below is to lead to gray haze
The main reason for generation, PM2.5Index can reflect the degree of gray haze pollution to a certain extent.
Gray haze particle all has certain negative electrical charge or positive charge in atmosphere, also there is electroneutral, but overall negative charge
Lotus.Its coherency, adhesion and stability are changed after gray haze charging particle.Unipolar charged gray haze particle, because mutually arranging
Reprimand reduces its cohesion rate, adhesion and stability improve, it is caused to be difficult to natural subsidence abatement in an atmosphere；Bipolar charging
For gray haze particle because attracting each other, cohesion rate is significantly greater than non-charged particle, provides condition for cohesion and fading of settlement naturally；
Non- charged gray haze particle can form dipolar nature induced electricity in the electric field, and effect is similar to bipolar charging gray haze particle.
Gray haze method for reducing is similar to industrial dust administering method in atmosphere, is mainly carried out using the charge of gray haze
, but technology is more complicated, and higher to Technical Economy requirement, the scope of application requires wider.Method for reducing can be divided into dry method and disappear
Subtract and cuts down with wet process；The physics method of residues, the chemical method of residues and the photochemistry method of residues etc. can also be divided into.A system has been disclosed in recent years
Column cut down the patent of invention of gray haze by modes such as electricity, magnetic, light, sound, chemistry and photochemistries.
In fine day by nature and artificial-strengthening mode, gray haze is rested on by way of settling or adsorbing ground,
Method on structures or plant surface is dry method abatement, and the smaller effect of partial size is poorer, to PM in short time interval2.5Abatement effect
It is not obvious.It is wet process abatement, PM in short time interval by the method that gray haze concentration reduces by natural and artificial cloud, mist, rain1.0
Following gray haze particle is difficult to be spontaneously wet out by water and agglomerate, because gray haze particle is usually that air or organic matter tight are lived, especially
It is to be substantially reduced for the hydrophily after organic matter package.
Zhejiang University patent of invention CN104815496A(2015-08-05) spray charged water spray is used efficiently to cut down greatly
Aerosol haze；China Mining University patent of invention CN106902595A(2017-06-30) it is middle using the table for spraying magnetized water reduction water
Face tension is to improve haze abatement effect；The Chinese Geology Univ. (Beijing) patent of invention CN105013255A(2015-11-04) in
Using sack cleaner principle, it will be installed on vehicle except haze device and carry out mobile abatement；Middle letter heavy industry machinery share is limited
Company patent of invention CN105890074A(2016-08-24) in borrow electrostatic precipitation technology principle, aerosol contaminants grain will be contained
In the air input Large-sized Electrostatic Precipitator of son, it is collected at contaminant particles quickly on electrode plate and cuts down, so that it is empty to export cleaning
Gas；Patent of invention CN105536987A(2016-05-04) in borrow air purifier principle, using large-scale anion, cation
Or kation anion generator sends negative ions to the secondary inorganic aerosol of atmosphere, it is electrically charged to neutralize aerosol contaminants institute,
Accelerate its cohesion and fading of settlement.
Gray haze abatement is related to the absorption and cohesion of particulate, is a complicated physical and chemical process, can adopt
Gray haze is promoted to cut down with chemical settling agent.Chemical settling agent can be divided into wetting sedimentation agent, coalescence nucleating agent and hygroscopicity sedimentation
Agent three classes.Its action principle is to change the surface of water droplet in atmosphere with the chemical settling agent of sprinkling and explosion dispersion in an atmosphere
Power and surface free energy improve water droplet to the affinity and penetration of gray haze particle, enable water droplet rapid osmotic to gray haze particle
Inside increases gray haze particle weight, while expanding gray haze particle volume and specific surface area, further improves gray haze particle
Adsorption capacity, particle, which gradually agglomerates, during the warm-up movement of gray haze particle grows up, natural subsidence abatement.
The inorganic type chemical settling agent of patent disclosure mainly includes MgCl2、CaCl2、NaCl、AlCl3、Na2SiO3、
Al2O3、SiO2Deng；The agent of organic type chemical settling mainly include high-performance water-absorbing resin, polyacrylamide, carboxymethyl cellulose and
The chemical settling agent kind of nonionic surfactant etc., patent disclosure is also fewer, and the key of popularization and application is to solve product
Safety and environmental protection problem.The patent of invention CN104403633A(2015-03-11 of the Institute of Oceanology of the Chinese Academy of Sciences) and
CN104492202A(2015-04-08 using the sodium alginate of safety and environmental protection and chitosan derivatives absorption abatement haze in)；Scape
The patent of invention CN103861404A(2014-06-18 of moral town ceramics institute) in the gas smaller than air specific weight blasted into surface
In aqueous surfactant solutions, absorption atmospheric haze, haze grain after bubbles burst are removed using the continuous bubble for increasing and rising of generation
For son with regard to flocking settling, this method is novel, since to cross die not very practical for required dosage of surfactant；Hunan collection can be new
The patent of invention CN106345214A(2017-01-25 of material limited liability company) it is middle using surfactant, organosilicon coupling
The compositions such as agent, photochemical catalyst, bacteriostatic agent, film forming agent equally exist cleanser complicated composition, ash as haze fast purification agent
Haze particle-trapping capabilities difference and not very practical defect.
Be exposed to the sun in the presence of photochemical catalyst is degradation and abatement organic pollutant most original and economic method, typical light
Catalyst is dichloride in anatase type TiO2Or dopen Nano TiO2, they can generate electronics e under sunlight irradiation-With hole h+, energy
The H for enough adsorbing photocatalyst surface2O、O2, organic pollutant oxidation or reduction, thus strength abatement pollutant.Dopen Nano
TiO2Photochemical catalyst can be obviously improved the hydrophilic and lipophilic of contaminated surface, and to be easier contaminated surface be water and glossy wet.Mesh
It is preceding to be applied to dispel solar cell, building, motor vehicle, billboard and highway barrier surface as self-cleaning coating component
Pollutant, but for atmosphere PM2.5Removal rate it is not high.Main cause is to be sprayed in pollution air to contain dopen Nano
TiO2The hydrosol of photochemical catalyst cannot efficiently trap gray haze particle, wrapped up doping in the coated film that structures surface is formed and received
Rice TiO2The active site of photochemical catalyst, urgent need exploiting economy is applicable in and the photocatalysis haze clearance technique of safety and environmental protection, realizes big
The treating both manifestation and root cause of disease of gas pollution.
Summary of the invention
The object of the present invention is to provide a kind of photocatalysis gray hazes to cut down agent, by Electrostatic Absorption agent, chemical settling agent, photocatalysis
Agent, stabilizing agentof sol, organo-silicon coupling agent, organic solvent and water composition, with the dopen Nano TiO of visible photoactivation2/ Fe2O3/
Al2O3/SiO2As main component, contained nano-oxide is one multi-purpose, its colloidal sol is sprayed directly on the sky containing gray haze
It in gas or is coated on structures surface, inside and outside Electrostatic Absorption, chemical settling and photocatalysis Decomposition compound action abatement chamber
Gray haze overcomes existing photocatalysis gray haze abatement product to gray haze particle-trapping capabilities difference and not very practical defect.
The mass percentage composition of photocatalysis gray haze abatement agent prescription of the present invention are as follows:
Dopen Nano TiO2 0.1%-1.5%
Nanometer Fe2O3 0.05%-1.1%
Nanometer Al2O3 0.05%-0.6%
Nano-meter SiO_22 0.1%-2%
Organo-silicon coupling agent 0.05%-1.5%
Stabilizing agentof sol 1%-10%
Organic solvent 10%-30%
Water surplus.
Electrostatic Absorption agent is dopen Nano TiO in photocatalysis gray haze abatement agent prescription of the present invention2, nanometer Fe2O3 And nanometer
Al2O3, partial size 5-20nm is decomposed to form by corresponding acetylacetone,2,4-pentanedione complex.Themselves is all positively charged, to logical
Often negatively charged gray haze particle has strong electrostatic attraction；Electrostatic attraction overcomes usually negatively charged gray haze particle
The electrostatic repulsion of itself flocks together to form big gray haze particle, is conducive to its natural gravity fading of settlement.
Dopen Nano TiO in photocatalysis gray haze abatement agent prescription of the present invention2, nanometer Fe2O3 With nanometer Al2O3Metal ion
Positive charge and Nano-meter SiO_22Molar ratio be 2-3:1, to guarantee to be completely counterbalanced by Nano-meter SiO_22The negative electrical charge of particle institute band, makes
The excessive positive charge of the sol particles of formation generally band.
Chemical settling agent is dopen Nano TiO in photocatalysis gray haze abatement agent prescription of the present invention2, nanometer Fe2O3 , nanometer
Al2O3And Nano-meter SiO_22, partial size 5-20nm.Since their partial size is small and specific surface area is very big, even if to uncharged ash
Haze particle also has strong chemisorption, thus the nucleus grown up as gray haze particle buildup；They have good
Hygroscopicity and hydrophily can change the surface tension and surface free energy of water droplet in atmosphere, improve water droplet to gray haze particle
Penetration enables water droplet rapid osmotic to gray haze inside particles, increases gray haze particle weight, its natural subsidence is promoted to cut down.
Photochemical catalyst is Fe-Al co-doped nano TiO in photocatalysis gray haze abatement agent prescription of the present invention2, by Titanium,
The sulfate of iron and aluminium is with molar ratio: being co-precipitated after Ti:Fe:Al=1:0.2-1:0.2-1 mixing, then is prepared by solvent-thermal method
It obtains.Difference from prior art is that not only a small amount of iron and aluminium element enter nano-TiO2Doping is realized in lattice, and
It is nano-TiO2, nanometer Fe2O3 With nanometer Al2O3Between there is also mutually composite mixed, it is possible to create iron titanate, metatitanic acid
The complicated light such as aluminium, ferrous acid aluminium, iron titanate be titania-doped, metatitanic acid aluminum doped titanium dioxide and ferrous acid aluminum doped titanium dioxide
Catalyst mixture, the nano-TiO after making doping2Photo-catalysis capability significantly improves, and just has under visible light illumination good
Photo-catalysis capability and surface tension can be greatly reduced.
Organo-silicon coupling agent is ethyl orthosilicate, methyl trimethoxy oxygroup silicon in photocatalysis gray haze abatement agent prescription of the present invention
Or mixtures thereof one of alkane, coupling agent KH550, coupling agent KH560, coupling agent KH570, for improving the abatement agent of photocatalysis gray haze
The filming performance of colloidal sol.
Stabilizing agentof sol is acetylacetone,2,4-pentanedione and acetic acid in photocatalysis gray haze of the present invention abatement agent prescription, and acetylacetone,2,4-pentanedione can be with
Nano-TiO2, nanometer Fe2O3 With nanometer Al2O3Complex is formed, promotes metal oxide deposits peptization, prevents nanogold
Belong to oxide particle cohesion to grow up；Acetic acid makes the acidity of oxide sol maintain faintly acid, prevents oxide sol from storing
Gel occurs in the process, its storage period is enable to reach 12 months or more.
Organic solvent is the fat miscible with water that carbon number is C1-C6 in photocatalysis gray haze abatement agent prescription of the present invention
Or mixtures thereof one of alcohol, ether and ketone.The addition of organic solvent can reduce the surface tension of oxide sol particles, it is easier to
Trap gray haze particle.The volatilization of Time window solvent, oxide sol quickly solidify to form tiny photocatalysis gray haze abatement agent and receive
Rice corpuscles forms firm coated film on structures surface.
The mass percentage concentration of photocatalysis gray haze of the present invention abatement agent solid active principle is 0.5%-5%, effective group of solid
Dividing dosage when abatement gray haze is 0.05-1.0 g/m3Gray haze air can be sprayed directly in air containing gray haze, can also be applied in advance
Cloth is on structures surface, and under weight haze weather, gray haze cut rate is 60%-80% in 2h.
The present invention be inventor's long campaigns solar battery automatically cleaning antireflective light conversion multifunctional coating on the basis of it is inverse
It is invented to thinking.Its action principle is that photocatalysis gray haze abatement agent particle or film itself are positively charged, can pass through electrostatic
Usually negatively charged gray haze particle is actively adsorbed in effect, to change the surface tension properties of gray haze particle, promotes gray haze
Particle wetting sedimentation, coalescence nucleation and moisture absorption sedimentation；Simultaneously to the subtle gray haze particle that not yet settles carry out photocatalysis Decomposition and
Change its surface hydrophobicity property, accelerates its cohesion to grow up and settled with moisture absorption.
It is a further object to provide a kind of preparation method of photocatalysis gray haze abatement agent, the technical solution taken
And step are as follows:
(1) chemical reagent titanyl sulfate, ferric sulfate and aluminum sulfate are dissolved in deionized water respectively and are configured to 2mol/L's
Sulfate liquor is filtered to remove insoluble matter respectively, is mixed to form mixed sulfate solution, molar ratio when control mixes
Are as follows: TiOSO4: Fe2(SO4)3: Al2(SO4)3=1:0.1-0.5: 0.1-0.5；
(2) ammonium hydroxide that concentration is 2mol/L is added into mixed sulfate solution under stiring, makes ferrotianium aluminium hydroxide
Co-precipitation, neutralizing solution to pH value is 9-11, makes the Ti to be formed (OH)4、Fe(OH)3With Al (OH)3Mixed sediment no longer increases
It is more；It is separated by filtration the hydroxide to be formed precipitating, is cleaned with deionized water and is precipitated in wash water not sulphate-containing ion；
(3) above hydroxide precipitating is dispersed in acetylacetone,2,4-pentanedione solvent, controls molar ratio are as follows: metal ion is just
Charge: acetylacetone,2,4-pentanedione=1:0.6-1.2 so that hydroxide precipitates complete peptization, and is heated to reflux processing at 130-140 DEG C
6-12h makes Ti (OH)4、Fe(OH)3With Al (OH)3It carries out chemical reaction and forms Fe-Al co-doped nano TiO2Photochemical catalyst is molten
Glue；
(4) commercial available alkaline silica solution is diluted to mass percentage concentration is 5%, with anion exchange resin process to solution
PH value is 2-4, obtains acidity nanometer SiO2Vitreosol；
(3) under stiring by dopen Nano TiO2Photocatalyst sol is added to acidity nanometer SiO2In vitreosol, control
Molar ratio are as follows: metal ion positive charge: Nano-meter SiO_22=2-3:1, and stirring strongly is to prevent stop-band positive charge colloidal sol and band
Negative electrical charge SiO2Colloidal sol, which combines, generates gel, makes the sol particles band excess positive charge to be formed；
(4) organo-silicon coupling agent is added into oxide sol under stiring, controls its molar ratio are as follows: nanometer
SiO2: organo-silicon coupling agent=1:0.05-1.5, acetic acid, which is added, makes colloidal sol pH 3-4；
(5) it is with the mass percentage concentration of organic solvent and deionized water dilution oxide sol to solid active principle
0.5%-5% obtains photocatalysis gray haze abatement agent finished product.
Photocatalysis gray haze abatement agent of the present invention can be sprayed directly on high-pressure sprayer or ultrasonic sprayer with low concentration
In air containing gray haze, liquid droplet diameter is 0.1-2 microns, extends its flotation time in air, effectively to trap gray haze grain
Son cuts down gray haze for indoor and outdoor air.Inside and outside metope, roof, billboard, decoration can also be coated with or are sprayed on high concentration
The ground such as plate, guardrail structures surface and automotive surfaces are for indoor and outdoor air abatement gray haze.
The advantages and benefits of the present invention are:
(1) contained nano-TiO in photocatalysis gray haze abatement agent of the present invention2/ Fe2O3/Al2O3/SiO2It is one multi-purpose, simultaneously
Play Electrostatic Absorption, chemical settling and photocatalysis Decomposition compound action；
(2) photocatalysis gray haze abatement agent raw material of the present invention is cheap and easy to get, preparation process simplicity and at low cost, easy industrialization
And application；
(3) present invention uses the full-inorganic formula material of Environmental Safety, does not select the organic original for influencing photocatalysis performance
Material, gray haze abatement agent coated film permanently effective can play a role.
Specific embodiment
Embodiment 1
Respectively by chemical reagent titanyl sulfate 25.8g(0.1mol), ferric sulfate 4.0g(0.01mol), aluminum sulfate 17.2g
(0.05mol) is dissolved in the sulfate liquor that 2mol/L is configured in deionized water, is filtered to remove insoluble matter respectively, is mixed to form mixed
Close sulfate liquor.The ammonium hydroxide 205mL that concentration is 2mol/L is added under under stiring into mixed sulfate solution makes ferrotianium aluminium
Hydroxide co-precipitation, neutralizing solution to pH value is 11, is separated by filtration the hydroxide to be formed precipitating, cleans hydrogen with deionized water
Oxide precipitation, with sulphate-containing ion is extremely in barium chloride test solution inspection wash water.Hydroxide precipitating is dispersed in 56g
In (0.56mol) acetylacetone,2,4-pentanedione solvent, make hydroxide precipitating can complete peptization, and place is heated to reflux at 130-140 DEG C
6h is managed, Fe-Al co-doped nano TiO is formed2Photocatalyst sol.
It is 5% that commercially available 30% alkaline silica sol of 37.2g(0.187mol), which is diluted to mass percentage concentration with deionized water, is used
Anion exchange resin process to solution ph is 4, under stiring by dopen Nano TiO2Photocatalyst sol is added to acidity
Nano-meter SiO_22In vitreosol, and stirring makes the sol particles band excess positive charge to be formed strongly.It is molten to oxide under stiring
Methyltrimethoxysilane coupling agent 1.36g(0.01mol is added in glue), acetic acid, which is added, makes colloidal sol pH 3-4, then with ethyl alcohol with
Deionized water dilutes the photocatalysis gray haze abatement agent finished product 5600g for being made that solid masses percentage concentration is 0.5%.
In two 15m2, the interior abatement gray haze that carries out to be installed of repairing the house of the high 2.7m of layer is tested, wherein as control survey between one
Between examination.It is detected under a certain heavy gray haze day noon solar irradiation, PM in rear chamber of closing the doors and windows2.5Concentration is 268 μ g/m3, directly
Meet PM when spraying 0.5% photocatalysis gray haze abatement agent solution 500g, 0.5h, 1.0h and 2.0h made above2.5Concentration is respectively
121μg/m3、81μg/m3With 54 μ g/m3；Corresponding gray haze cut rate is respectively as follows: 54.8%, 69.8% and 79.9%；It is right during test
According to the PM in room2.5Without significant changes.
Embodiment 2
Respectively by chemical reagent titanyl sulfate 25.8g(0.1mol), ferric sulfate 8.0g(0.02mol), aluminum sulfate 8.6g
(0.025mol) is dissolved in the sulfate liquor that 2mol/L is prepared in deionized water, is filtered to remove insoluble matter respectively, is mixed to form mixed
Close sulfate liquor.The ammonium hydroxide 235mL that concentration is 2mol/L is added under under stiring into mixed sulfate solution makes ferrotianium aluminium
Hydroxide co-precipitation, neutralizing solution to pH value is 10, is separated by filtration the hydroxide to be formed precipitating, cleans hydrogen with deionized water
Oxide precipitation, examining sulfate radical-free ion in wash water with barium chloride test solution is extremely.Hydroxide precipitating is dispersed in 47g
In (0.47mol) acetylacetone,2,4-pentanedione solvent, make hydroxide precipitating can complete peptization, and place is heated to reflux at 130-140 DEG C
10h is managed, Fe-Al co-doped nano TiO is formed2Photocatalyst sol.
It is 5% that commercially available 30% alkaline silica sol of 47.1g(0.235mol), which is diluted to mass percentage concentration with deionized water, is used
Anion exchange resin process to solution ph is 3, under stiring by dopen Nano TiO2Photocatalyst sol is added to acidity
Nano-meter SiO_22In vitreosol.KH560 coupling agent 9.44g(0.04mol is added into oxide sol under stiring), second is added
Acid makes colloidal sol pH 3-4, then dilutes the photocatalysis gray haze that obtained solid masses percentage concentration is 5% with ethyl alcohol and deionized water and disappear
Subtract agent finished product 750g.
In two 15m2, the high 2.7m of layer it is to be installed repair the house in carry out abatement gray haze test, all metopes between testing apply
Cloth photocatalysis gray haze made above cuts down agent finished product 500g, and another is not handled by as control test.In a certain gray haze
It is detected under its noon solar irradiation, first opening door and window 2 hours makes indoor and outdoor concentration balance, measures two after being then shut off door and window
Indoor PM2.5Concentration is 252 μ g/m3, between test door and window closing after 0.5h, 1.0h and 2.0h when PM2.5Concentration is respectively 165
μg/m3、133μg/m3With 85 μ g/m3；Corresponding gray haze cut rate is respectively 34.5%, 47.2% and 66.3%；It is compareed during test
PM in room2.5Without significant changes.
Claims (6)
1. a kind of photocatalysis gray haze cuts down agent, it is characterised in that steady by Electrostatic Absorption agent, chemical settling agent, photochemical catalyst, colloidal sol
Agent, organo-silicon coupling agent, organic solvent and water composition are determined, with the dopen Nano TiO of visible photoactivation2/ Fe2O3/Al2O3/SiO2
As main component, contained nano-oxide is one multi-purpose, the mass percentage composition of formula are as follows:
Dopen Nano TiO2 0.1%-1.5%
Nanometer Fe2O3 0.05%-1.1%
Nanometer Al2O3 0.05%-0.6%
Nano-meter SiO_22 0.1%-2%
Organo-silicon coupling agent 0.05%-1.5%
Stabilizing agentof sol 1%-10%
Organic solvent 10%-30%
Water surplus.
2. photocatalysis gray haze according to claim 1 cuts down agent, it is characterised in that Electrostatic Absorption agent is dopen Nano in formula
TiO2, nanometer Fe2O3 With nanometer Al2O3, partial size 5-20nm, itself is all positively charged, to usually negatively charged gray haze grain
Son has strong electrostatic attraction.
3. photocatalysis gray haze according to claim 1 cuts down agent, it is characterised in that chemical settling agent is dopen Nano in formula
TiO2, nanometer Fe2O3 , nanometer Al2O3And Nano-meter SiO_22, partial size 5-20nm.
4. photocatalysis gray haze according to claim 1 cuts down agent, it is characterised in that photochemical catalyst is Fe-Al codope in formula
Nano-TiO2, by the sulfate of Titanium, iron and aluminium with molar ratio: it is co-precipitated after Ti:Fe:Al=1:0.2-1:0.2-1 mixing,
It is prepared again by solvent-thermal method, there is good photo-catalysis capability under visible light illumination and surface tension can be greatly reduced.
5. photocatalysis gray haze according to claim 1 cuts down agent, it is characterised in that stabilizing agentof sol is acetylacetone,2,4-pentanedione in formula
And acetic acid, control molar ratio are as follows: metal ion positive charge: acetylacetone,2,4-pentanedione=1:0.6-1.2, acetic acid, which is added, makes colloidal sol pH
3-4。
6. a kind of preparation method of photocatalysis gray haze abatement agent, it is characterised in that the technical solution and step of preparation process are as follows:
(1) chemical reagent titanyl sulfate, ferric sulfate and aluminum sulfate are dissolved in the sulfuric acid that 2mol/L is configured in deionized water respectively
Salting liquid is filtered to remove insoluble matter respectively, is mixed to form mixed sulfate solution, molar ratio when control mixes are as follows:
TiOSO4: Fe2(SO4)3: Al2(SO4)3=1:0.1-0.5: 0.1-0.5；
(2) ammonium hydroxide that concentration is 2mol/L is added into mixed sulfate solution under stiring, keeps ferrotianium aluminium hydroxide coprecipitated
It forms sediment, neutralizing solution to pH value is 9-11, makes the Ti to be formed (OH)4、Fe(OH)3With Al (OH)3Mixed sediment no longer increases；It crosses
The hydroxide precipitating that filter separation is formed, is cleaned with deionized water and is precipitated in wash water not sulphate-containing ion；
(3) above hydroxide precipitating is dispersed in acetylacetone,2,4-pentanedione solvent, controls molar ratio are as follows: metal ion positive electricity
Lotus: acetylacetone,2,4-pentanedione=1:0.6-1.2 so that hydroxide precipitating can complete peptization, and place is heated to reflux at 130-140 DEG C
6-12h is managed, Ti (OH) is made4、Fe(OH)3With Al (OH)3It carries out chemical reaction and forms Fe-Al co-doped nano TiO2Photochemical catalyst
Colloidal sol；
(4) commercial available alkaline silica solution is diluted to mass percentage concentration is 5%, with anion exchange resin process to solution ph
For 2-4, acidity nanometer SiO is obtained2Vitreosol；
(3) under stiring by dopen Nano TiO2Photocatalyst sol is added to acidity nanometer SiO2In vitreosol, control feeds intake
Molar ratio are as follows: metal ion positive charge: Nano-meter SiO_22=2-3:1, and stirred strongly to prevent stop-band positive charge colloidal sol and negatively charged
Lotus SiO2Colloidal sol, which combines, generates gel, makes the sol particles band excess positive charge to be formed；
(4) organo-silicon coupling agent is added into oxide sol under stiring, controls its molar ratio are as follows: Nano-meter SiO_22: it is organic
Silicone couplet=1:0.05-1.5, acetic acid, which is added, makes colloidal sol pH 3-4；
It (5) is 0.5%- with the mass percentage concentration of organic solvent and deionized water dilution oxide sol to solid active principle
5%, obtain photocatalysis gray haze abatement agent finished product.
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| CN106348649A (en) * | 2016-08-26 | 2017-01-25 | 上海绿特丹保温工程有限公司 | Photocatalytic anti-fog sand-wall shape negative ion coating |
| CN106391083A (en) * | 2016-09-06 | 2017-02-15 | 南京林业大学 | Preparation method of nitrogen doped titanium dioxide photocatalyst for tunnel coatings |
| CN106634078A (en) * | 2016-12-26 | 2017-05-10 | 福州名谷纳米科技有限公司 | Core-shell structure hybrid sol with photocatalysis characteristic, and preparation and application thereof |
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| CN106348649A (en) * | 2016-08-26 | 2017-01-25 | 上海绿特丹保温工程有限公司 | Photocatalytic anti-fog sand-wall shape negative ion coating |
| CN106391083A (en) * | 2016-09-06 | 2017-02-15 | 南京林业大学 | Preparation method of nitrogen doped titanium dioxide photocatalyst for tunnel coatings |
| CN106634078A (en) * | 2016-12-26 | 2017-05-10 | 福州名谷纳米科技有限公司 | Core-shell structure hybrid sol with photocatalysis characteristic, and preparation and application thereof |
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