CN105195325B - Application of the lithium niobate pyroelectricity material based on temperature regulation and control in Atmospheric particulates are adsorbed - Google Patents
Application of the lithium niobate pyroelectricity material based on temperature regulation and control in Atmospheric particulates are adsorbed Download PDFInfo
- Publication number
- CN105195325B CN105195325B CN201410242576.9A CN201410242576A CN105195325B CN 105195325 B CN105195325 B CN 105195325B CN 201410242576 A CN201410242576 A CN 201410242576A CN 105195325 B CN105195325 B CN 105195325B
- Authority
- CN
- China
- Prior art keywords
- lithium niobate
- heating
- temperature
- air
- absorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 title claims abstract description 107
- 239000000463 material Substances 0.000 title claims abstract description 58
- 230000005616 pyroelectricity Effects 0.000 title abstract description 27
- 230000033228 biological regulation Effects 0.000 title description 5
- 239000002245 particle Substances 0.000 claims abstract description 39
- 238000010521 absorption reaction Methods 0.000 claims abstract description 35
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000001179 sorption measurement Methods 0.000 claims abstract description 25
- 239000013618 particulate matter Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000428 dust Substances 0.000 claims abstract description 5
- 230000000638 stimulation Effects 0.000 claims abstract description 5
- 230000000694 effects Effects 0.000 claims description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052744 lithium Inorganic materials 0.000 claims description 9
- 239000008187 granular material Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 210000000440 neutrophil Anatomy 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims 1
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 230000009471 action Effects 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000009102 absorption Effects 0.000 description 30
- 239000004793 Polystyrene Substances 0.000 description 25
- 229920002223 polystyrene Polymers 0.000 description 24
- 239000011324 bead Substances 0.000 description 23
- 239000013078 crystal Substances 0.000 description 22
- 238000001914 filtration Methods 0.000 description 18
- 238000004458 analytical method Methods 0.000 description 11
- 239000000706 filtrate Substances 0.000 description 10
- 230000008859 change Effects 0.000 description 7
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 6
- 239000010955 niobium Substances 0.000 description 6
- 239000000523 sample Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 229910052758 niobium Inorganic materials 0.000 description 4
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000443 aerosol Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 229910052745 lead Inorganic materials 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000004887 air purification Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000004255 ion exchange chromatography Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002277 temperature effect Effects 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000002305 electric material Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- CTISCMCFPOFTKK-UHFFFAOYSA-N ethene;trifluoro-$l^{3}-chlorane Chemical group C=C.FCl(F)F CTISCMCFPOFTKK-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 1
- 231100001240 inorganic pollutant Toxicity 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The present invention provides the lithium niobate pyroelectricity material regulated and controled based on temperature as application of the air filting material in Atmospheric particulates are adsorbed and a kind of using method of the lithium niobate as the absorption Atmospheric particulates of air filting material, lithium niobate discharges charge under the thermal stimulation of heating, realizes the absorption to Atmospheric particulates.The temperature of lithium niobate after the heating is 30 150 DEG C, preferably 80 150 DEG C, most preferably 100 DEG C.The method further includes：After particulate matter adsorption saturation, the particulate matter of the lithium niobate pyroelectricity material removal absorption is washed with water, is reheated, Electro Sorb is released to the repeatable of particulate matter to realize.Lithium niobate can generate enough electrostatic adsorption forces when heated, effectively adsorb the dust in air, PM10, PM2.5And submicron particles, and the dielectric loss under temperature action is small, therefore can repeatedly be charged to it, and energy storage-stable charge, so as to extend service life.
Description
Technical field
The invention belongs to electret air purification fields, and in particular to a kind of lithium niobate pyroelectricity material based on temperature regulation and control
Expect the application in Atmospheric particulates are adsorbed.
Background technology
The appearance of haze weather and continue, seriously affected daily life, the health of people brought
High risks cause extensive concern and the attention of society.Haze includes mist and haze two layers of meaning：Mist is near by being largely suspended in
The aerosol systems of small water droplet or ice crystal composition in ground air, come across autumn and winter more, are in ground layer air
The product of condensation vapor (or sublimating)；Haze is made of particles such as dust, sulfuric acid, nitric acid, the organic hydrocarbon compounds in air.
Haze is mainly made of sulfur dioxide, nitrogen oxides and pellet, the above two are gaseous pollutant, last particle
Object is only the first cause for aggravating haze weather pollution.The PM formed more particularly to haze10Or even PM2.5, increasingly cause people
Concern.And wherein PM2.5It compares it because its grain size is smaller while specific surface area is larger with coarseparticulate and is easier to be enriched with
Noxious material, such as bacterium and heavy metal ion and health it is closely related.
The states such as America and Europe are all with PM2.5As the standard of evaluation Particulate Pollution, and China is for PM2.5Research starting is relatively
Evening is mainly based upon PM2.5Source, ingredient and the relationship with atmospheric pressure etc. between meteorological conditions and human factor, and take
Obtained some progress.At present, it is domestic it has been reported that the contaminant particle on the ground such as Beijing has been carried out using various analysis into
Point, the analysis in source etc..PMF methods are used for PM2.5Carry out source resolution, it is determined that 5 class fine particles pollution source of Beijing area, i.e.,
Soil dirt, coal combustion, communications and transportation, marine aerosol and steel and iron industry.Using ion chromatography (IC) to PM10And PM2.5In water
Soluble anion F-,Cl-,NO3 -And SO4 2-It is measured, the results showed that F- is primarily present in PM10(10 μm of raw granulate fraction>
Grain size>2.5 μm), and Cl-,NO3 -And SO4 2-Ion is then easier to be enriched in fine grained.Inductively coupled plasma mass spectrometry
(ICP-MS) urban area of Beijing winter haze weather PM is analyzed2.5In 36 kinds of elements, and using enrichment factor to concentration of element
Feature is analyzed.So-called enrichment factor method refers to carry out the concentration of element in the concentration of element in sample and baseline pair
Than the artificial pollution situation of element in supergene environment medium being judged with this, in order to reduce surrounding medium and sampling sample preparation
Influence of the journey to concentration of element, the calculating of enrichment factor often introduce reference element and are standardized, the reference member as standardization
The element that usually chemical property of the earth is stablized during the life of selection table, such as Al, Ti, Sc, Zr.The result shows that haze weather is sent out
When raw, As, Cr, the heavy metals such as Pb, Ti and V are Beijing PM2.5In host inorganic pollutant, have 27 kinds of elements in 36 kinds of elements
Concentration is above non-haze weather.When enrichment of element feature shows that haze weather occurs, Cr, Cu, the enrichment factor of Zn and Pb is high
It is the element of heavy contamination in 10, caused by various pollutions caused by the mankind's activities such as mainly coal-fired and industrial pollution.
Existing air cleaning unit is mainly made of two parts, fillter section of the part to eliminate pellet,
Another part is the clean-up stage for eliminating pernicious gas.And in fillter section, air filting material plays decisive role.
It is earlier during the World War I by the purposive air filtration aspect that is used for of filtering material, asbestos are fine
Dimension is as a large amount of application of filtrate and gas roof mask, and in subsequent decades, glass fiber filter material, superfine glass are fine
The more excellent filtering kind of the various performances such as dimensional filter material, non-woven filter material is researched and developed, and on this basis in succession
The filtering materials such as electret filtrate, composite filtering material etc. be novel are had also appeared, these development all for air filtration technology have provided
The condition of profit.Using most one kind in the i.e. current used air filter of traditional filter material, woven filtrate, needle can be divided into
Three kinds of filtrate, non-woven filtrate etc. are knitted, wherein non-woven filtrate can be divided into nonwoven needled filtrate, nonwoven, melt sprinkling filter material again
Etc. several.These materials rely primarily on the effect of the mechanical stops such as Blang's diffusion, retention, inertial collision, gravitational settling, pass through fiber
Grid is filtered air atom.Therefore, to filtering out PM2.5And following particulate matter, the size for needing grid are enough
It is small, the resistance pressure drop of filtration system can be increased in this way so that the energy consumption of filtration system increases therewith, on the one hand increases filtering and makes
Valency, while very high requirement is also proposed to the technique of air filter.Moreover, these filtering materials are with adsorption particle concentration
Increase, adsorption efficiency can be greatly reduced, in addition the cleaning to filter screen is often difficult larger, therefore be nearly all it is disposable,
It cannot reuse, cause energy waste and filter the increase of cost.The shortcomings that another can not be underestimated is it to tiny
The removal efficiency of particle is low, and harmful microorganism is easily multiplied on filtering material, and there are the possibility of secondary pollution.
For the above problem present in common filter material, some novel absorption materials (such as electret filtrate, composite filtering material etc.)
Discovery and using having obtained the concern of scientists.Especially electret air filtering material, because its have efficiently, low-resistance,
The advantages that energy saving, antibacterial is a kind of very promising novel air filtering material.
At present, it is mainly the organic electret material based on high polymer as electret air filtering material, such as non-pole
Property material：Polypropylene, polytetrafluoroethylene (PTFE), hexafluoropropene-teflon-copolymers etc.；Polarity or weak property material：Poly- trifluoro chlorine
Ethylene, polypropylene (are blended) and poly-vinegar etc..This kind of material is in addition to traditional filtrates such as inertial collision, interception effect, diffusion effects
Outside the mechanism of action, the capture to air atom is also realized by Coulomb force.When air atom passes through filter, electrostatic force is not only
Charged particle can effectively be attracted, and polarized neutral particle is captured, therefore with high efficiency with electrostatic induction effect.With this
Meanwhile the flow resistance that this kind of material generates in adsorption process is smaller, substantially reduces energy consumption, is obtained in air filtering system
It is widely applied.However, the manufacturing technique requirent of electret filter media fibre is higher, complexity in electric process, and due to aerosol
The shielding action that the neutralization of middle charged particles or particle deposition generate electrostatic force so that filter material surface charge decay is very fast, inhales
Attached efficiency reduces, and moisture-proof heat resistance is poor, easy aging when and fire-fighting requirements must select incombustible material and fire when do not send out
The reasons such as the material of raw toxic gas, largely limit the application of organic electret filtrate.
Lithium niobate is a kind of typical pyroelectricity inorganic electret material, and so-called pyroelectric refers to, when crystal temperature effect is sent out
Changing (heated or cooling), the center of positive and negative charge can be subjected to displacement, so as to which polarization intensity occurs with the change of temperature
Variation, causes the bound charge of plane of crystal to change therewith.Lithium niobate is transparent crystal colourless or with yellow green,
The surface Curie temperature T of lithium niobatecIt it is 1210 DEG C, lithium columbate crystal belongs to trigonal system, 3m point groups, in TcIt is below ferroelectric phase,
In TcIt is paraelectric phase above.External electric field is applied to the lithium columbate crystal for being in single domain ferroelectric phase, when external electric field progressively increases to niobium
During the coercive field of sour lithium, due to there is the body-centered of 1/3 oxygen octahedra empty, Nb5+And Li+Start gradually to start to move to negative optical axis direction
It is dynamic, finally stablize the opposite side in oxygen octahedra body-centered, as a result overturning i.e. periodical poling can occur for the polarization direction of lithium niobate, such as scheme
Shown in 1.
Invention content
An object of the present invention is to provide a kind of new application of the lithium niobate pyroelectricity material regulated and controled based on temperature.
The new application of lithium niobate pyroelectricity material provided by the present invention is that it is adsorbing air as air filting material
Application in particulate matter.
In the application, lithium niobate generates the temperature difference by heating so that lithium niobate surface generates a large amount of free charges, then profit
The polar particulate in air is captured with the free charge or neutrophil granule is made to be captured after polarizing.
The Atmospheric particulates include：Dust, PM10、PM2.5And submicron particles.
Chip of the lithium niobate for the Z-direction of single domain growth, and carried out twin polishing.
It is also another object of the present invention to provide a kind of methods for adsorbing Atmospheric particulates.
The method of absorption Atmospheric particulates provided by the present invention be made using lithium niobate as air filting material its
The lower release charge of thermal stimulation effect, so as to fulfill the absorption to Atmospheric particulates.
Chip of the lithium niobate for the Z-direction of single domain growth, and carried out twin polishing.
The thermal stimulation is heating.
In the above-mentioned methods, the temperature difference is generated by heating so that lithium niobate surface generates a large amount of free charges, recycles institute
It states the polar particulate in free charge capture air or neutrophil granule is made to be captured after polarizing, so as to fulfill to airborne particulate
The absorption of object.
During heating, positive charge is presented in lithium niobate surface, negative particles in adsorbable air (contaminant particle in air
Elecrtonegativity is presented in the overwhelming majority).
The Atmospheric particulates include：Dust, PM10、PM2.5And submicron particles.
The method specifically includes following step：First lithium niobate pyroelectricity material is heated, it then will heating
Lithium niobate afterwards, which is placed in atmospheric environment, adsorbs Atmospheric particulates.
The temperature of lithium niobate after the heating is 30-150 DEG C, preferably 80-150 DEG C, most preferably 100 DEG C.
In order to keep higher adsorption effect, continuous heating preferably is carried out to lithium niobate in the adsorption process.
The temperature of the continuous heating can be 100 DEG C.
The method can also further comprise following step：(i.e. lithium niobate surface cannot be again after lithium niobate adsorption saturation
Have apparent absorption), it washes with water the particulate matter of lithium niobate pyroelectricity material removal absorption and neutralizes lithium niobate surface and remain
Remaining charge reheats the lithium niobate pyroelectricity material, to realize that lithium niobate releases Electro Sorb to the repeatable of particulate matter.
The pyroelectricity material regulated and controled using the temperature difference can easily be charged repeatedly, simplify note electric process.Based on quiet
The method of Electro Sorb can be with the polarity fine particulates in Direct Acquisition air, while also are able to that neutrophil granule object is made to polarize, so
It is captured afterwards.This method has the no selectivity of the size of particulate matter particularly with the tiny particles content of micro-nano-scale
There is higher adsorption efficiency.Meanwhile the wear resistance of lithium columbate crystal can then substantially increase its service life.
The electrostatic of surface charge that the present invention is generated using inorganic electret pyroelectricity material lithium niobate under temperature regulation and control
Pollution particulate matter in effect absorption air.Since the pyroelectricity material only needs temperature regulation and control that can quickly generate a large amount of charges,
It is confirmed by the analysis of the size to adsorption particle and contained element, lithium niobate can generate enough Electrostatic Absorptions when heated
Power, the effective dust adsorbed in air, PM10, PM2.5And submicron particles, present lithium niobate answering as filtering material
With potentiality and prospect.
It is different from commonly used in the polymer electret material of Electrostatic Absorption, Jie of the pyroelectricity material under temperature action
Electrical loss is small, therefore can repeatedly be charged to it, and energy storage-stable charge, so as to extend service life.Heat is released
Electric material lithium niobate surface potential attenuation research shows that, the charge decay on the pyroelectricity material lithium niobate surface is slow, once
Releasing electricity can maintain for a long time, and adsorption efficiency is high.The pyroelectricity material is cheap, and preparation method is simple and practicable, tests table
Bright, after heating 200 times repeatedly, apparent variation does not occur lithium niobate for adsorption capacity.And since it only needs the temperature difference i.e.
Controllable surface potential, thus have many advantages, such as note electricity be simple and convenient to operate, can repeated charge, have in air purification field
Good application prospect.
Description of the drawings
Fig. 1 is the crystal structure schematic diagram that lithium niobate carries out periodical poling under strong electric field.
Fig. 2 is absorption figure of the lithium niobate to 300 μm of polystyrene (PS) beads that different temperatures is heated in embodiment 1.
Wherein, scheme (a)-figure (m) 30 DEG C -150 DEG C of corresponding temperature respectively, temperature gradient is 10 DEG C.
Fig. 3 is has the lithium niobate crystal chip of same initial heating condition (100 DEG C) 1h (baking ovens after the heating in embodiment 2
The time being inside cooled to room temperature), 25h, 73h and 121h be to the absorption figures of PS beads.Wherein, figure (a)-figure (d) is corresponding respectively adds
1h, 25h, 73h and 121h after heat, lithium niobate crystal chip is to the absorption figure of PS beads.
Fig. 4 is absorption figure of the lithium niobate to PS beads that different temperatures is heated in embodiment 3.Wherein, a, b, c are corresponding
The temperature of lithium niobate after heating is respectively 100 DEG C, 150 DEG C and 200 DEG C.
Fig. 5 is in embodiment 4 under haze weather, and lithium niobate adsorbs scanning electron microscope (SEM) figure of air particles.
Fig. 6 is in embodiment 4 under haze weather, and lithium niobate adsorbs atomic force microscope (AFM) figure of air particles.
Fig. 7 is X-ray energy spectrum (EDS) analysis chart that lithium niobate adsorbs air particles in embodiment 5.
Fig. 8 is x-ray photoelectron spectroscopy (XPS) analysis chart of lithium niobate adsorption particle in embodiment 5.
When Fig. 9 is that lithium niobate is heated to 100 DEG C repeatedly in embodiment 6, to the comparison diagram of PS beads absorption situation.Wherein,
Heating times corresponding to a, b, c, d are respectively 50,100,150 and 200 times.
Specific embodiment
Below by specific embodiment, the present invention will be described, but the present invention is not limited thereto.
Experimental method used in following embodiments is conventional method unless otherwise specified；Institute in following embodiments
Reagent, material etc., are commercially available unless otherwise specified.
Embodiment 1, lithium niobate optimal adsorption temperature determine
The power of pyroelectric effect can be represented with pyroelectric coefficient.Polarized change and the change formula of pyroelectricity temperature
It is as follows：Δ P=p Δs T (p is pyroelectric coefficient, and Δ T is the change of crystal temperature effect, and Δ P is polarized knots modification).From principle
For, lithium niobate material surface can just be made to generate charge simply by the presence of temperature difference.It, can not since lithium niobate crystal chip thickness is larger
Its surface potential is directly characterized using electrostatic force microscope, therefore, passes through the absorption at different temperatures to elecrtonegativity PS beads
Amount can characterize its surface potential size, and filter out best pyroelectricity temperature accordingly indirectly.
Lithium niobate pyroelectricity material is cut into the small pieces of 13 2cm × 2cm, be heated separately to different temperatures (30 DEG C, 40
DEG C, 50 DEG C, 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C, 110 DEG C, 120 DEG C, 130 DEG C, 140 DEG C, 150 DEG C), to being in electronegative
Polystyrene (PS, 300 μm) bead is adsorbed.
Fig. 2 is absorption figure of the lithium niobate to 300 μm of PS beads for being heated to different temperatures.Wherein, scheme (a)-figure (m) point
Other 30 DEG C -150 DEG C of corresponding temperature, temperature gradient are 10 DEG C.
Can significantly it find out from figure, with the raising of temperature, lithium niobate gradually increases the adsorbance of PS beads, when
When temperature reaches 100 DEG C, lithium niobate surface is completely covered for PS beads, illustrates lithium niobate just table at a lower temperature
Reveal pyroelectric, and as temperature increases, the quantity of electric charge on surface gradually increases, and Coulomb force effect is more and more stronger, to PS beads
Absorption it is also more apparent.It is found by comparing the absorption situation under different temperatures, when temperature is more than 100 DEG C, to PS beads
Adsorbance is without too big variation.Therefore, in subsequent experiment, adsorption temp is set as 100 DEG C by us.Also illustrate niobium with this
Sour lithium is not high to pyroelectricity temperature requirement, and a relatively low temperature just can generate very strong adsorption capacity, be used as air filting material
When have the advantages that energy consumption it is low.
Embodiment 2, lithium niobate charge storage ability
The lithium niobate crystal chip for cutting several areas identical (1cm × 2cm) cleans up, and is put in clean culture dish,
It is placed in baking oven simultaneously, after being heated to 100 DEG C, treats that oven temperature is cooled to room temperature taking-up.Then inhale every taking out a piece of do for 24 hours
Attached experiment, and the variation of adsorbance is recorded and observes, the method ensure that per a piece of lithium niobate be all under same primary condition
Natural Attenuation.
For the lithium niobate crystal chip with same initial heating condition (100 DEG C), 1h (is cooled to room to Fig. 3 after the heating in baking oven
The time of temperature), 25h, 73h and 121h be to the absorption figures of PS beads.Wherein, scheme (a)-figure (d) respectively 1h after corresponding heating,
25h, 73h and 121h, lithium niobate crystal chip is to the absorption figure of PS beads.
As seen from the figure：Over time, in two days of beginning, the attenuation of lithium niobate crystal chip surface charge is slower, inhales
Attached PS beads amount is not substantially change；And in subsequent several days, there is apparent attenuation in the surface charge of lithium niobate, to the
6 days adsorption capacities lost to PS beads.Compared with the rapid decay of the charge of polymer electret, lithium niobate has
Excellent charge storage ability.Therefore, it can be kept within very long a period of time to Atmospheric particulates by a pyroelectricity
Adsorption capacity.
Embodiment 3, lithium niobate crystal chip electrical property of heat releasing
Since lithium niobate crystal body thickness is larger, the surface charge that pyroelectricity generates can not pass through atomic force measurement surface potential
Method characterization, therefore, the present invention by lithium niobate after pyroelectricity for be in electronegative polystyrene sphere absorption it is indirect
Characterize its surface potential.Under different heating condition, lithium niobate can adsorb the PS beads of 300 μm of grain size.
Fig. 4 is absorption figure of the lithium niobate to PS beads for being heated to different temperatures.Wherein, after the corresponding heating of a, b, c
The temperature of lithium niobate is respectively 100 DEG C, 150 DEG C and 200 DEG C.
As seen from the figure：Lithium niobate after heating, surface are presented a large amount of positive charge, there is stronger coulomb interaction, show pair
The extremely strong suction-operated of PS beads.
The granularmetric analysis of fine particulates in embodiment 4, lithium niobate absorption air
Lithium niobate is cut into 1cm × 1cm sizes, in severe haze weather, the lithium niobate crystal chip cut is put in thermal station
Whole device until the temperature of the lithium niobate crystal chip after heating is 100 DEG C, is then put at 100 DEG C of outdoor and persistently adds by upper heating
Heat adsorbs the haze ingredient in air to analyze, adsorption time 10h.
Fig. 5 is the SEM figures of lithium niobate absorption air particles under haze weather.
Fig. 6 is the AFM figures of lithium niobate absorption air particles under haze weather.
From the figure, it can be seen that lithium niobate can be to haze weather, the various sizes particle in air, including dust,
PM10, PM2.5It can effectively be adsorbed with submicron particles.The particle size distribution of absorption is big, grain size range
Including hundreds of nanometers to tens microns.This illustrates grain size of the Electrostatic Absorption for particulate matter without selectivity, therefore can be very
PM is adsorbed in big degree2.5And the particulate matter of following size.
The constituent analysis of fine particulates in embodiment 5, lithium niobate absorption air
By after lithium niobate pyroelectricity and do not release electricity lithium niobate be positioned in air existing for haze simultaneously, and utilize
EDX power spectrums, x-ray photoelectron spectroscopy (XPS) and inductively coupled plasma are with mass spectrometry (ICP-MS) to what is adsorbed
Particulate matter carries out elemental composition analysis.
Fig. 7 is the EDS analysis charts that lithium niobate adsorbs air particles.
As shown in Figure 7：The members such as O, Na, Al are known as apparent peak value, it may be determined that are element contained by adsorption particle object.The result
Substantially it is consistent with the elemental composition in the haze particle of report, it is really the haze particle in air to illustrate adsorbed particle.
Detected element and content is shown in Table 1.
Element species and content contained by the air particles of table 1EDS analyses
| Element | Weight percent | Atomic percent | Element | Weight percent | Atomic percent |
| O | 50.44 | 74.17 | Cl | 4.64 | 3.08 |
| Na | 1.88 | 1.92 | K | 0.84 | 0.50 |
| Al | 3.39 | 2.95 | Ca | 2.81 | 1.65 |
| Si | 8.87 | 7.43 | Fe | 1.48 | 0.62 |
| S | 2.37 | 1.74 | As | 0.75 | 0.23 |
| Nb | 22.54 | 5.71 | Total amount | 100 | 100 |
Fig. 8 is the XPS analysis figure of lithium niobate adsorption particle.
The results show that contain the elements such as Si, Zn, O, S, Ca, C, Fe, N in the particle adsorbed, the result and EDS results
It is consistent.
In view of EDS and XPS sensitivity it is relatively low the problem of, further using ICP-MS to do not release after pyroelectricity and electricity niobium
The sample that sour lithium adsorbs under the same conditions is analyzed, and the results are shown in Table 2.
The analysis result of element contained by the air particles that table 2ICP-MS adsorbs lithium niobate
| Element | Sample signal intensity | Blank signal intensity |
| Co | 6.799 | 0.089 |
| Zr | 4.346 | 1.32 |
| Ag | 3.365 | 0.023 |
| Sn | 6.023 | 0.072 |
| Sb | 0.185 | 0.035 |
| Au | 2.088 | 0.063 |
| Hg | 0.282 | 0.062 |
| Pb | 11.989 | 0.515 |
| In | 0.012 | 0.001 |
| Mo | 65.11 | 0.366 |
The results show that the sample signal intensity of the elements such as Co, Zr, Ag, Sn, Sb, Au, Hg, Pb, In, Mo is apparently higher than sky
The signal strength of white control sample is element contained by adsorption particle.This is with largely reporting about air particles, especially PM2.5
The ICP-MS test results of ingredient are consistent.
These testing results absolutely prove that the substance using lithium niobate absorption is really air pollution particulate matter, it was confirmed that niobium
Sour lithium is used as the feasibility of air filting material.
Embodiment 6, lithium niobate pyroelectricity life test
It is utilized in the present invention with a piece of lithium niobate crystal chip, after being heated to 100 DEG C, adsorption experiment is done to PS beads immediately.It treats
After adsorbance reaches saturation, the PS beads of lithium niobate crystal on piece are washed with water, at the same time, water can also be by lithium niobate surface
Charging neutrality.It is so repeated multiple times, and experimental result is recorded to compare.
When Fig. 9 is heated to 100 DEG C repeatedly for lithium niobate, to the comparison diagram of PS beads absorption situation.Wherein, a, b, c, d institute
Corresponding heating times are respectively 50,100,150 and 200 times.
As can be observed from Figure, suction of the lithium niobate to PS beads after heating is adsorbed 50,100,150 and 200 times repeatedly
Attached not change significantly, the dielectric loss for fully demonstrating lithium niobate is small, can be used for heating and cleaning repeatedly, and clean
It is easier, service life is long.
Lithium niobate this repeatable feature supplements for releasing Electro Sorb conventional filter material cannot be reused and clean tired
The defects of difficult, embodies feasibility and advantage that lithium niobate is used as air filting material.
Claims (8)
- A kind of 1. method for adsorbing Atmospheric particulates, it is characterised in that：Using lithium niobate as air filting material, the niobic acid Lithium discharges charge under thermal stimulation effect, so as to fulfill the absorption to Atmospheric particulates；In the method, the temperature difference is generated by heating so that lithium niobate surface generates a large amount of free charges, recycles the freedom Polar particulate in charge-trapping air makes neutrophil granule the free charge be recycled to be captured after polarizing；During heating, positive charge is presented in lithium niobate surface, for adsorbing the negative particles in air；Chip of the lithium niobate for the Z-direction of single domain growth, and carried out twin polishing.
- 2. according to the method described in claim 1, it is characterized in that：The thermal stimulation is heating；The Atmospheric particulates are selected from dust.
- 3. according to the method described in claim 1, it is characterized in that：The Atmospheric particulates are selected from PM10、PM2.5And sub-micron Particle.
- 4. according to the method described in claim 1, it is characterized in that：The temperature of lithium niobate after the heating is 30-150 DEG C.
- 5. according to the method described in claim 1, it is characterized in that：The temperature of lithium niobate after the heating is 80-150 DEG C.
- 6. according to the method described in claim 1, it is characterized in that：The temperature of lithium niobate after the heating is 100 DEG C.
- 7. according to the method described in claim 6, it is characterized in that：Continuous heating is carried out to lithium niobate in the adsorption process, The temperature of the continuous heating is 100 DEG C.
- 8. according to the described method of any one of claim 1-7, it is characterised in that：The method further includes following steps Suddenly：After lithium niobate adsorption saturation, wash with water the lithium niobate and remained with removing the particulate matter of absorption and neutralizing lithium niobate surface Remaining charge reheats the lithium niobate, to realize that lithium niobate releases Electro Sorb to the repetition of particulate matter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410242576.9A CN105195325B (en) | 2014-06-03 | 2014-06-03 | Application of the lithium niobate pyroelectricity material based on temperature regulation and control in Atmospheric particulates are adsorbed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410242576.9A CN105195325B (en) | 2014-06-03 | 2014-06-03 | Application of the lithium niobate pyroelectricity material based on temperature regulation and control in Atmospheric particulates are adsorbed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105195325A CN105195325A (en) | 2015-12-30 |
| CN105195325B true CN105195325B (en) | 2018-06-19 |
Family
ID=54943476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410242576.9A Active CN105195325B (en) | 2014-06-03 | 2014-06-03 | Application of the lithium niobate pyroelectricity material based on temperature regulation and control in Atmospheric particulates are adsorbed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105195325B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104280271A (en) * | 2014-09-24 | 2015-01-14 | 江苏中科睿赛污染控制工程有限公司 | Temperature difference control-based atmospheric particulate sampling method for preparing lithium niobate |
| CN106040161B (en) * | 2016-07-05 | 2020-09-04 | 北京中科艾加科技有限公司 | Pyroelectric crystal particle, application thereof, composite material and screening method |
| CN106192047A (en) * | 2016-07-05 | 2016-12-07 | 中国人民大学 | Thermal history modeling and preparation method thereof and the application in air cleaning |
| CN107457078A (en) * | 2017-09-19 | 2017-12-12 | 东北师范大学 | The adjustable irregular arista electrode plate of Temperature Distribution based on Internet of Things |
| CN109746120B (en) * | 2017-11-03 | 2021-02-26 | 北京中科艾加科技有限公司 | Filter device comprising piezoelectric composite material and application of filter device in adsorption of atmospheric particulates |
| CN108170894B (en) * | 2017-12-04 | 2021-05-18 | 国网江苏省电力有限公司电力科学研究院 | Parameterization calculation method for dry settlement of atmospheric particulate matters of external insulator of power transmission and transformation equipment |
| CN110732186B (en) * | 2019-10-24 | 2022-02-22 | 国家纳米科学中心 | Porous air filtering membrane and preparation method and application thereof |
| CN113622087A (en) * | 2020-05-06 | 2021-11-09 | 深圳陶陶科技有限公司 | Targeted antibacterial reusable melt-blown non-woven fabric and preparation method and application thereof |
| CN111621988B (en) * | 2020-05-29 | 2022-07-26 | 东莞东阳光科研发有限公司 | Mask melt-blown layer and preparation method thereof |
| CN112058614B (en) * | 2020-09-09 | 2023-02-28 | 重庆科技学院 | Novel method for dynamically regulating wettability of ionic liquid |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5230800A (en) * | 1992-02-20 | 1993-07-27 | Minnesota Mining And Manufacturing Company | Scrim inserted electrostatic fibrous filter web |
| AU4581493A (en) * | 1992-07-30 | 1994-03-03 | E.V.E. Holdings Limited | Electrostatic filter |
| US5817584A (en) * | 1995-12-22 | 1998-10-06 | Kimberly-Clark Worldwide, Inc. | High efficiency breathing mask fabrics |
| JP2002210383A (en) * | 2001-01-22 | 2002-07-30 | Toyo Commun Equip Co Ltd | Electrostatic filter |
-
2014
- 2014-06-03 CN CN201410242576.9A patent/CN105195325B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105195325A (en) | 2015-12-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105195325B (en) | Application of the lithium niobate pyroelectricity material based on temperature regulation and control in Atmospheric particulates are adsorbed | |
| AU2018203359B2 (en) | Magnetic adsorbents, methods for manufacturing a magnetic adsorbent, and methods of removal of contaminants from fluid streams | |
| CN106607012B (en) | Polyvinylidene fluoride nano composite material and preparation method and application thereof | |
| CN109746120B (en) | Filter device comprising piezoelectric composite material and application of filter device in adsorption of atmospheric particulates | |
| AU2018203359A1 (en) | Magnetic adsorbents, methods for manufacturing a magnetic adsorbent, and methods of removal of contaminants from fluid streams | |
| Varlikli et al. | Adsorption of dyes on Sahara desert sand | |
| Fumba et al. | Equilibrium and kinetic adsorption studies of methyl orange from aqueous solutions using kaolinite, metakaolinite and activated geopolymer as low cost adsorbents | |
| CN103894077A (en) | Composite filter membrane with multidimensional pore structure and preparation method thereof | |
| CN106192047A (en) | Thermal history modeling and preparation method thereof and the application in air cleaning | |
| CN105944502A (en) | Gas filtering device and air filtering system | |
| CN106110762A (en) | The material of a kind of high efficiency filter air particle and preparation method | |
| US20150336081A1 (en) | Magnetic adsorbents, methods for manufacturing a magnetic adsorbent, and methods of removal of contaminants from fluid streams | |
| KR20190012868A (en) | Non-woven fabric filter for reducing particulate matter and Method for preparing the same | |
| WO2018187633A2 (en) | Nanoporous metal foam gas filters | |
| Luo et al. | A facile route for preparation of magnetic biomass activated carbon with high performance for removal of dye pollutants | |
| CN104998510B (en) | Removing device and method for inhalable particles and fine particles in flue gas | |
| CN103821593A (en) | Automobile tail gas filter device | |
| Ma et al. | The performance evaluation of pleated electret filters enhanced by electrostatic enhanced method | |
| CN105562204B (en) | Flue gas purification device and method for trapping PM2.5-PM10 in advancing magnetic field by means of magnetic porous media | |
| Chen et al. | Feasibility of using bed filters packed with rice-straw-based activated carbon and selected biomass waste for the control of frying fume exhaust | |
| CN206852090U (en) | A kind of MOFS materials mouth mask | |
| KR102537612B1 (en) | Self-propelled adsorbent and a method for purifying contaminated water using the same | |
| Lee et al. | Removal characteristics of paint particles generated from paint spray booths | |
| CN204911114U (en) | Inhalable particle and fine particles's desorption device in flue gas | |
| CN204261474U (en) | Highly effective air purification air composite filtering material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181123 Address after: 225316 Jiangsu Province Taizhou Medical Avenue No. 1 2 Southwest Side Patentee after: TAIZHOU HAILU BIOTECHNOLOGY Co.,Ltd. Address before: 100872 No. 59 Zhongguancun Street, Haidian District, Beijing Patentee before: RENMIN University OF CHINA |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191101 Address after: Yang Yanlu 101407 Beijing city Huairou District Yanqi Economic Development Zone No. 88 Patentee after: BEIJING ZHONGKE AIJIA TECHNOLOGY Co.,Ltd. Address before: 225316 Jiangsu Province Taizhou Medical Avenue No. 1 2 Southwest Side Patentee before: TAIZHOU HAILU BIOTECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: 518000, 2nd Floor, Building 3, Zone 30, Kefa Road, Science and Technology Park Community, Yuehai Street, Nanshan District, Shenzhen, Guangdong Province, China, 2F93 Patentee after: Shenzhen Zhongke Aijia Biological Materials Co.,Ltd. Country or region after: China Address before: 101407 Yang Yan Road 88, Yan Qi Economic Development Zone, Huairou District, Beijing Patentee before: BEIJING ZHONGKE AIJIA TECHNOLOGY Co.,Ltd. Country or region before: China |
|
| CP03 | Change of name, title or address |