CN101992080A - Nanometer titanium dioxide slurry with high photocatalysis efficiency through coupling and modifying and preparation method thereof - Google Patents
Nanometer titanium dioxide slurry with high photocatalysis efficiency through coupling and modifying and preparation method thereof Download PDFInfo
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- CN101992080A CN101992080A CN2009101093159A CN200910109315A CN101992080A CN 101992080 A CN101992080 A CN 101992080A CN 2009101093159 A CN2009101093159 A CN 2009101093159A CN 200910109315 A CN200910109315 A CN 200910109315A CN 101992080 A CN101992080 A CN 101992080A
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Abstract
The invention discloses nanometer titanium dioxide slurry with high photocatalysis efficiency through coupling and modifying and a preparation method thereof. The nanometer titanium dioxide slurry is mainly composed of nanometer titanium dioxide powder, dispersing agent and water, and also can comprise active carbon, iron black, kieselguhr and a microcapsule control release preparation. The preparation method comprises the following steps: dissolving the dispersing agent into the water, transferring the mixture into the nanometer titanium dioxide powder; dispersing and carrying out ball milling to obtain the nanometer titanium dioxide slurry. The nanometer slurry not only has excellent photocatalysis efficiency under ultraviolet light, but also has higher photocatalysis efficiency under sunlight.
Description
Technical field
The present invention relates to a kind of high-performance optical catalyst, relate in particular to a kind of nano titania slurry that under daylight, has better photocatalysis efficiency by the coupling modification.
The present invention also relates to a kind of preparation method who has the nano titania slurry of better photocatalysis efficiency under daylight by the coupling modification simultaneously.
Background technology
Nano titanium oxide has higher photocatalytic activity, good chemical stability and heat endurance, non-secondary pollution, nonirritant, safety non-toxic, convenient characteristics such as be easy to get, and is one of current environmental protection catalyst that has DEVELOPMENT PROSPECT most.It rationally utilizes natural daylight resource normal temperature and pressure to produce electronics and the hole can move to particle surface very soon, with the H that is adsorbed on particle surface
2O and O
2Reaction generates hydroxyl radical free radical and crosses negative oxygen ion, thereby can make the organic pollution of titanium dioxide surface absorption be decomposed into CO
2, H
2Innocuous substances such as O play the effect of mineralizing and degrading environmental contaminants and restraining and sterilizing bacteria.
Nano-TiO
2Excellent properties depend on the size of particle diameter to a great extent, but the nano particle specific area is big, specific surface energy is high, belong to thermodynamic unstable system, in preparation process or in the last handling process since particle between ubiquitous Van der Waals force and Coulomb force, surface particle is close together mutually, thereby make nanoparticle agglomerates form second particle, form soft-agglomerated and hard aggregation, lose due rerum natura of particle and function when causing titanium dioxide finally to be used.Nano-TiO
2Dispersion situation in the aqueous solution directly influences it in industrial practical applications such as nanometer plating, light catalyzed coatings.Therefore the dispersion stabilization of nano particle is the key of its performance function.
The while nano-TiO
2The photochemical catalyst greater band gap can only be not more than the ultraviolet excitation of 387nm by wavelength, and this part ultraviolet ray (300-400nm) only accounts for and reach 4%～6% of ground solar energy, and solar energy utilization ratio is very low.And visible light (400-700nm) has accounted for 45% of solar energy gross energy, and therefore can prepare the photochemical catalyst raising solar energy utilization ratio that has high photocatalysis efficiency under the visible light becomes key problem in technology.
In order to further expand the application of titanium dioxide, be necessary nano titanium oxide is carried out modification to prepare the photochemical catalyst slurry that has the greater catalytic performance under daylight.
Summary of the invention
The technical problem to be solved in the present invention provides a kind ofly all has coupling modified nano-titanium dioxide slurry of better photocatalysis efficiency and preparation method thereof under ultraviolet light He under the daylight.
For addressing the above problem, the nano titania slurry of the high photocatalysis efficiency of coupling modification of the present invention, mainly make and each weight percentages of components is: nano-titanium dioxide powder 3%-35% by following component, the first dispersant 0-5%, the second dispersant 0-8%, activated carbon 0-10%, iron black 0-15%, diatomite 0-20%, controlled release formulation of capsule 0-10%, surplus is a water.
Further, each weight percentages of components of described nano titania slurry is: nano-titanium dioxide powder 5%-30%, first dispersant is 0.05-2%, second dispersant is 0-5%, activated carbon is 0-5%, and the iron oxide black is 0-8%, and diatomite is 0-10%, controlled release formulation of capsule 0-5%, surplus is a water.
Described first dispersant and second dispersant are aqueous dispersion, wherein first dispersant is the mixture of Hydropalat 800, Hydropalat 3275, Hydropalat 5040, Hydropalat 5050 or Hydropalat 5040 and calgon, and second dispersant is Hydropalat 3275, Hydropalat 3091 or Hydropalat 392.Above Hydropalat series dispersant is provided by Haichuan Company (Oceanpower).
The crystal formation of described nano-titanium dioxide powder is a Detitanium-ore-type, and particle diameter is the 10-60 nanometer.
The preparation method of described nano titania slurry, its step comprises, 1) first dispersant of setting weight is soluble in water, transfer to the nano-titanium dioxide powder of setting weight, 2) with 5000-10000 rev/min speed high speed dispersion, jitter time is no more than 3.5 hours, and 3) under 2000-3000 rev/min grinder, carried out ball milling 2-10 hour, make nano titania slurry.
Further, its concrete steps are: 1) that first dispersant of setting weight is soluble in water, transfer to the nano-titanium dioxide powder of setting weight, 2) with 5000-10000 rev/min speed high speed dispersion, jitter time is no more than 3.5 hours, and 3) carry out ultrasonic dispersion, jitter time is no more than 10 minutes, 4) under 2000-3000 rev/min grinder, carry out ball milling 2-10 hour, make nano titania slurry.
Further again, its concrete steps are: 1) that first dispersant of setting weight is soluble in water, transfer to the nano-titanium dioxide powder of setting weight, 2) with 5000-10000 rev/min speed high speed dispersion, jitter time is no more than 3.5 hours, 3) carry out ultrasonic dispersion, jitter time is no more than 10 minutes, 4) add activated carbon, 5) under 2000-3000 rev/min grinder, carried out 6 ball milling 2-10 hour) add second dispersant of setting weight, 7) with 500-1000 rev/min, stirred 10-30 minute, each component is stirred, make nano titania slurry.
Further, the iron oxide black that also adds setting weight in step 4) also adds the controlled release formulation of capsule of setting weight or/and diatomite in step 6).
The shearing force that described high speed dispersion produces can also can make dispersant molecule be coated on particle surface uniformly the bulky grain refinement of nano-titanium dioxide powder.Described ultrasonic dispersion adopts 1200W large power supersonic instrument to carry out, localized hyperthermia, high pressure, strong shock wave and the microjet etc. that produce when utilizing ultrasonic cavitation to disperse, and the nanometer interaction energy between the reduction nanoparticle prevents the nanoparticle reunion.Described ball milling can make each material fully be coupled, and can reduce the particle diameter of material simultaneously.
Nano titania slurry of the present invention adopts described dispersant by high speed dispersion, ultrasonic dispersion, and the soft or hard that dispersion methods such as ball milling are opened between nano-powder is reunited, and reduces the particle diameter of powder, ensures its nanoscale " size quantization " and " area " effect.Adopt iron black simultaneously, active carbon, controlled release formulation of capsule etc. and nano titanium oxide disperse the technology of slurry coupling, and one side reduces the recombination rate of hole and electronics, strengthen the capturing ability of photochemical catalyst on the other hand, thereby improve the degradation rate of pollutant and the photocatalysis efficiency under the daylight pollutant.Therefore the present invention all has photocatalysis efficiency preferably under ultraviolet light He under the daylight.
The specific embodiment
The present invention is a kind of nano titania slurry that has the high light catalytic efficiency under daylight by the coupling modification, and its key component is a nano titanium oxide, and dispersant and water can also comprise activated carbon, iron oxide black, diatomite, controlled release formulation of capsule.Said components is by dispersion, and steps such as ball milling are made nano titania slurry.Pulp preparation back is well brushed on test plate (panel), puts into airtight gas tank after the drying, feeds certain density nitrogen dioxide gas, estimates its photocatalysis performance by the variation of measuring the degradation speed of nitrogen dioxide under the fluorescent lamp.
Embodiment 1
Taking by weighing nano-titanium dioxide powder 60g, is that first dispersant takes by weighing 0.6g with Hydropalat 800, water 240g, adopt the hydrochloric acid solution of 1mol/L to regulate its pH value to 5,8000 rev/mins of high speed dispersion 2 hours, 2000 rev/mins of zirconium pearl ball millings 3 hours, laser particle analyzer is tested its granularity D
50Be 55nm, this slurry is placed 48h lamination can not take place.
Embodiment 2
Take by weighing nano-titanium dioxide powder 70g, with Hydropalat3275 is that first dispersant takes by weighing 1.2g, water 240g, adopt the hydrochloric acid solution of 1mol/L to regulate its pH value to 4,6000 rev/mins of high speed dispersion 2 hours, ultrasonic dispersion 2 minutes, 2500 rev/mins of zirconium pearl ball millings 4 hours, laser particle analyzer is tested its granularity D
50Be 48nm, this slurry is placed 48h lamination can not take place.
Embodiment 3
Take by weighing nano-titanium dioxide powder 40g, with Hydropalat 5040 and calgon is that the bi-component dispersant is as first dispersant, wherein H5040 takes by weighing 0.6g, calgon 0.4g, water 200g adopts the sodium hydroxide solution of 1mol/L to regulate its pH value to 8,10000 rev/mins of high speed dispersion 2 hours, ultrasonic dispersion 4 minutes, 2500 rev/mins of zirconium pearl ball millings 6 hours, laser particle analyzer is tested its granularity D
50Be 35nm, this slurry is placed 48h lamination can not take place.
Embodiment 4
Take by weighing nano-titanium dioxide powder 60g, with Hydropalat 5040 is that first dispersant takes by weighing 0.6g, water 240g, 8000 rev/mins of high speed dispersion 2 hours, ultrasonic dispersion 3 minutes adds activated carbon 9g, 3000 rev/mins of ball millings 6 hours, with Hydropalat 3275 is that second dispersant takes by weighing 4g powder, and 500 rev/mins were stirred 15 minutes.Adopting the glass plate of 120 * 200mm is model, and thickness is 100 μ m.This paste color is even, no fubai phenomenon behind the coated plate.Test result shows that the degradation rate of nitrogen dioxide in 15 minutes reaches more than 95%, disperses the slurry degradation rate to improve 15 percentage points than nano titanium oxide independent under the same nitrogen dioxide initial concentration.
Embodiment 5
Take by weighing nano-titanium dioxide powder 70g, with Hydropalat 800 is that first dispersant takes by weighing 1.4g, water 280g, 10000 rev/mins of high speed dispersion 3.5 hours, ultrasonic dispersion 4 minutes adds activated carbon 11.5g, iron black 2.9g, 3000 rev/mins of ball millings 6 hours are that second dispersant takes by weighing 6g with Hydropalat 3091, and 800 rev/mins were stirred 20 minutes.Adopting the glass plate of 120 * 200mm is model, and thickness is 100 μ m.This paste color is even, no fubai phenomenon behind the coated plate.Test result shows that the degradation rate that contained iron black slurry nitrogen dioxide in 15 minutes reaches more than 96%.
Embodiment 6
Take by weighing nano-titanium dioxide powder 60g, with Hydropalat 5050 is that first dispersant takes by weighing 0.8g, water 240g, 10000 rev/mins of high speed dispersion 3 hours, ultrasonic dispersion 3 minutes, add activated carbon 9g, iron black 2.3g, 3000 rev/mins of ball millings 6 hours are that second dispersant takes by weighing 5g with Hydropalat 392, controlled release formulation of capsule 16g, 800 rev/mins were stirred 15 minutes.Adopting the glass plate of 120 * 200mm is model, and thickness is 100 μ m.This paste color is even, no fubai phenomenon behind the coated plate.Test result shows that this slurry can make the degradation rate of nitrogen dioxide reach about 97% in 15 minutes.
Embodiment 7
Take by weighing nano-titanium dioxide powder 70g, with Hydropalat 5040 and calgon be first dispersant wherein H5040 take by weighing 1.5g, calgon 2.0g, water 280g, 10000 rev/mins of high speed dispersion 3.5 hours, ultrasonic dispersion 4 minutes adds activated carbon 11g, iron black 3g, diatomite 3g, 3000 rev/mins of ball millings 6 hours are that second dispersant takes by weighing 5g with Hydropalat 3091, controlled release formulation of capsule 16g, 700 rev/mins were stirred 20 minutes.Adopting the glass plate of 120 * 200mm is model, and thickness is 100 μ m.This paste color is even, no fubai phenomenon behind the coated plate.Test result shows that this slurry can make the degradation rate of nitrogen dioxide reach about 95% in 10 minutes.
The above is preferred embodiment of the present invention, is not limited to the present invention, all modifications of being done in the present invention spirit and principle, is equal to replacement or improvement etc., all should be included in protection scope of the present invention.
Claims (9)
1. nano titania slurry of the high photocatalysis efficiency of modification that is coupled, it is characterized in that, mainly make and each weight percentages of components is: nano-titanium dioxide powder 3%-35% by following component, the first dispersant 0.05-5%, the second dispersant 0-8%, activated carbon 0-10%, iron black 0-15%, diatomite 0-20%, controlled release formulation of capsule 0-10%, surplus is a water.
2. nano titania slurry according to claim 1, it is characterized in that, each weight percentages of components is: nano-titanium dioxide powder 5%-30%, first dispersant is 0.05-2%, and second dispersant is 0-5%, and activated carbon is 0-5%, the iron oxide black is 0-8%, diatomite is 0-10%, controlled release formulation of capsule 0-5%, and surplus is a water.
3. nano titania slurry according to claim 1 and 2, it is characterized in that: described first dispersant and second dispersant are aqueous dispersion, wherein first dispersant is the mixture of Hydropalat 800, Hydropalat 3275, Hydropalat5040, Hydropalat 5050 or Hydropalat 5040 and calgon, and second dispersant is Hydropalat 3275, Hydropalat 3091 or Hydropalat 392.
4. nano titania slurry according to claim 1 and 2 is characterized in that: the crystal formation of described nano-titanium dioxide powder is a Detitanium-ore-type, and particle diameter is the 10-60 nanometer.
5. the preparation method of the arbitrary described nano titania slurry of claim 1 to 4, its step comprises, 1) first dispersant of setting weight is soluble in water, transfer to the nano-titanium dioxide powder of setting weight, 2) with 5000-10000 rev/min speed high speed dispersion, jitter time is no more than 3.5 hours, and 3) under 2000-3000 rev/min grinder, carried out ball milling 2-10 hour, make nano titania slurry.
6. preparation method according to claim 5, it is characterized in that, its concrete steps are: 1) that first dispersant of setting weight is soluble in water, transfer to the nano-titanium dioxide powder of setting weight, 2) with 5000-10000 rev/min speed high speed dispersion, jitter time is no more than 3.5 hours, 3) carry out ultrasonic dispersion, jitter time is no more than 10 minutes, and 4) under 2000-3000 rev/min grinder, carried out ball milling 2-10 hour, make nano titania slurry.
7. preparation method according to claim 6, it is characterized in that, its concrete steps are: 1) that first dispersant of setting weight is soluble in water, transfer to the nano-titanium dioxide powder of setting weight, 2) with 5000-10000 rev/min speed high speed dispersion, jitter time is no more than 3.5 hours, 3) carry out ultrasonic dispersion, jitter time is no more than 10 minutes, 4) add the activated carbon of setting weight, 5) under 2000-3000 rev/min grinder, carry out ball milling 2-10 hour, 6) second dispersant of adding setting weight, 7) with 500-1000 rev/min, stirred 10-30 minute, each component is stirred, make nano titania slurry.
8. preparation method according to claim 7 is characterized in that, also adds the iron oxide black of setting weight or/and diatomite in step 4).
9. according to claim 7 or 8 described preparation methods, it is characterized in that, also add the controlled release formulation of capsule of setting weight in step 6).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107652807A (en) * | 2017-10-24 | 2018-02-02 | 沈阳顺风新材料有限公司 | A kind of preparation method of water anti-bacteria coating |
| CN108479856A (en) * | 2018-03-23 | 2018-09-04 | 河北大学 | A kind of photocatalyst and preparation method thereof used under dim light or no light condition |
| CN110856820A (en) * | 2018-08-24 | 2020-03-03 | 义乌倍肯新材料科技有限公司 | Nano titanium dioxide dispersion emulsion and preparation process thereof |
-
2009
- 2009-08-12 CN CN2009101093159A patent/CN101992080A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107652807A (en) * | 2017-10-24 | 2018-02-02 | 沈阳顺风新材料有限公司 | A kind of preparation method of water anti-bacteria coating |
| CN108479856A (en) * | 2018-03-23 | 2018-09-04 | 河北大学 | A kind of photocatalyst and preparation method thereof used under dim light or no light condition |
| CN108479856B (en) * | 2018-03-23 | 2020-11-24 | 保定绿怡佳环保科技有限公司 | Photocatalyst used under weak light or no light condition and preparation method thereof |
| CN110856820A (en) * | 2018-08-24 | 2020-03-03 | 义乌倍肯新材料科技有限公司 | Nano titanium dioxide dispersion emulsion and preparation process thereof |
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