CN109173485A - A kind of material for air purification and preparation method thereof - Google Patents
A kind of material for air purification and preparation method thereof Download PDFInfo
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- CN109173485A CN109173485A CN201811249333.2A CN201811249333A CN109173485A CN 109173485 A CN109173485 A CN 109173485A CN 201811249333 A CN201811249333 A CN 201811249333A CN 109173485 A CN109173485 A CN 109173485A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/06—Polluted air
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Abstract
The invention discloses a kind of material for air purification and preparation method thereof; the material for air purification includes honeycomb strainer and the cleansing composition for being filled in the honeycomb strainer, and the cleansing composition is prepared from the following materials: samaric sulfide, pucherite, ferrous tungstate, diatomite, the recessed soil of activity, hafnium hydroxide, lithium metaaluminate, iron oxide, chitin fiber, taurine sodium deoxycholate, graphene oxide, coconut shell powder, negative ion powder, leaf mould, polyvinyl alcohol, deionized water.Material for air purification provided by the invention to the filterability of PM2.5 be up to 99.2 and its more than, the purification efficiency of formaldehyde, benzene pernicious gas in air is up to respectively simultaneously 95.3% and 92.7% and its more than, air effectively has been purified, air environment can be significantly improved.The good permeability of the material for air purification has the function of purification air, is very suitable to produce in enormous quantities and its apply.
Description
The application is application No. is 2016109407915, and the applying date is on November 02nd, 2016, and invention and created name is
The divisional application of the patent of " a kind of material for air purification and preparation method thereof ".
Technical field
The invention belongs to technical field of air purification, and in particular to a kind of material for air purification and its system for filtering PM2.5
Preparation Method.
Background technique
PM2.5 is current one of the common contaminant for influencing people's quality of life, and a diameter of about 2.5 μm of particle suspends
Object, this particle suspensions are referred to as go directly to the alveoli in medicine and biological educational circles, and long-term sucking can damage lung qi pipe, or even go out
Existing foul disease disease.PM2.5 pollutant is mainly burning, biomass (the crops straw for passing through fossil fuel (such as coal, petroleum product)
Stalk, forest fire etc.) burning, waste incineration etc. and the dust in industrial production, the fugitive dust on road, construction site raise
What the approach such as dirt, kitchen fume were discharged, main component is that Organic Compounds, nitrate, sulfate, volatility are organic
Object and calcium, aluminium, zinc, arsenic, cadmium, iron, lead and other elements.Therefore, for the removing of PM2.5 and filtering increasingly by the weight of people
Depending on.
In the environment in addition to there are other than PM2.5 pollutant, there is also the sightless bacterium of a large amount of naked eyes and such as formaldehyde,
The air pollutants such as benzene, toluene and oil smoke can also seriously affect people's health if these pollutants are handled not in time.Often
The PM2.5 filtering material seen does not have the function of removing other pollutants, in consideration of it, research and develop it is a kind of can treatment effect it is good
PM2.5, good permeability are filtered, and the material for air purification of air can be purified simultaneously again, there is good market application prospect.
Summary of the invention
The object of the present invention is to provide a kind of material for air purification and preparation method thereof, to solve above at least one technology
Problem.
Technical solution of the present invention is come as follows:
A kind of material for air purification, it is described net including honeycomb strainer and the cleansing composition for being filled in the honeycomb strainer
Change composition to be prepared by the raw material of following parts by weight: 11-19 parts of samaric sulfide, 12-22 parts of pucherite, ferrous tungstate 7-13
Part, 5-12 parts of diatomite, recessed 3-9 parts of the soil of activity, 4-11 parts of hafnium hydroxide, 6-13 parts of lithium metaaluminate, 2-8 parts of iron oxide, shell are poly-
Sugared fiber 3-10 parts, 4-9 parts of taurine sodium deoxycholate, 6-10 parts of graphene oxide, 5-12 parts of coconut shell powder, negative ion powder 3-
7 parts, 4-9 parts of leaf mould, 2-8 parts of polyvinyl alcohol, 36-45 parts of deionized water.
In above-mentioned technical proposal, the negative ion powder be mass ratio be 1:3:1.8 Strange ice stone powder, albumen mountain flour, radium stone
The mixture of powder.
In above-mentioned technical proposal, the partial size of the samaric sulfide is 100-500nm.
In above-mentioned technical proposal, the cleansing composition is prepared by the raw material of following parts by weight: samaric sulfide 12-17
Part, 13-21 parts of pucherite, 7.8-11 parts of ferrous tungstate, 5.5-11.2 parts of diatomite, active recessed soil 3.6-8.5 parts, hafnium hydroxide
4.2-10.3 parts, 6.8-11 parts of lithium metaaluminate, 2.6-7.2 parts of iron oxide, 3.4-8.7 parts of chitin fiber, Tauroursodeoxycholic Acid
Sour sodium 4.5-8.4 parts, 6.5-9.2 parts of graphene oxide, 5.8-11.4 parts of coconut shell powder, 3.7-6.4 parts of negative ion powder, leaf mould
4.5-8.3 parts, 2.5-7.3 parts of polyvinyl alcohol, 38-43 parts of deionized water.
Another technical solution of the invention is come as follows:
A kind of preparation method of material for air purification, including following preparation step:
Coconut shell powder and leaf mould are uniformly mixed by step 1, prior to 600-800 DEG C at keep the temperature 5-8 hours, be cooled to room
Then temperature is uniformly mixed with diatomite, the recessed soil of activity, keeps the temperature 1-4 hours at 800-1000 DEG C, cooled to room temperature,
It is finely ground to obtain pretreatment powder；
Graphene oxide is placed in 1/4 deionized water by step 2, and ultrasonic disperse is uniform, and it is fine that chitosan is then added
Dimension, taurine sodium deoxycholate, continuation ultrasonic disperse is uniform, obtains mixed liquor M；
Iron oxide, lithium metaaluminate, samaric sulfide, pucherite, ferrous tungstate, hafnium hydroxide are placed in remaining deionization by step 3
It in water, is uniformly mixed, adds polyvinyl alcohol, continue to be uniformly mixed, obtain mixed liquor N；
The mixed liquor M that step 2 obtains and the mixed liquor N that step 3 obtains are stirred 60- at 70-90 DEG C by step 4
It 150 minutes, is evaporated and is ground to 500-800 mesh powder；
Powder obtained in step 4 is uniformly mixed with the pretreatment powder in step 1 to get cleansing composition by step 5；
Step 6, by the cleansing composition prepared in step 5 be filled in honeycomb strainer to get.
In above-mentioned technical proposal, in step 1, prior to 720 DEG C at keep the temperature 6 hours.
In above-mentioned technical proposal, in step 1,2 hours are kept the temperature at 950 DEG C.
In above-mentioned technical proposal, in step 4, it is stirred at 85 DEG C 120 minutes.
Due to using above technical scheme, the invention has the benefit that
Material for air purification provided by the invention to the filterability of PM2.5 be up to 99.2 and its more than, while in air
Formaldehyde, benzene pernicious gas purification efficiency respectively be up to 95.3% and 92.7% and its more than, effectively purified air, can
Significantly improve air environment.The good permeability of the material for air purification has the function of purification air, and it is raw to be very suitable to high-volume
It produces and its applies.
Specific embodiment
Combined with specific embodiments below, present invention is further described in detail.The following examples are intended to illustrate the invention,
But it is not intended to limit the scope of the invention.
Embodiment 1
A kind of material for air purification, it is described net including honeycomb strainer and the cleansing composition for being filled in the honeycomb strainer
Change composition to be prepared by the raw material of following parts by weight: 11 parts of samaric sulfide, 12 parts of pucherite, 7 parts of ferrous tungstate, diatomite 5
Part, activity recessed native 3 parts, 4 parts of hafnium hydroxide, 6 parts of lithium metaaluminate, 2 parts of iron oxide, 3 parts of chitin fiber, Tauro ursodesoxy cholic acid
4 parts of sodium, 6 parts of graphene oxide, 5 parts of coconut shell powder, 3 parts of negative ion powder, 4 parts of leaf mould, 2 parts of polyvinyl alcohol, deionized water 36
Part.
Wherein, the negative ion powder be mass ratio be 1:3:1.8 Strange ice stone powder, albumen mountain flour, radium mountain flour mixture.
Wherein, the partial size of the samaric sulfide is 100-500nm.
The preparation method of the material for air purification, including following preparation step:
Coconut shell powder and leaf mould are uniformly mixed by step 1, prior to 600 DEG C at keep the temperature 5 hours, be cooled to room temperature, then
It is uniformly mixed with diatomite, the recessed soil of activity, keeps the temperature 1 hour at 800 DEG C, cooled to room temperature is finely ground to be pre-processed
Powder；
Graphene oxide is placed in 1/4 deionized water by step 2, and ultrasonic disperse is uniform, and it is fine that chitosan is then added
Dimension, taurine sodium deoxycholate, continuation ultrasonic disperse is uniform, obtains mixed liquor M；
Iron oxide, lithium metaaluminate, samaric sulfide, pucherite, ferrous tungstate, hafnium hydroxide are placed in remaining deionization by step 3
It in water, is uniformly mixed, adds polyvinyl alcohol, continue to be uniformly mixed, obtain mixed liquor N；
The mixed liquor M that step 2 obtains and the mixed liquor N that step 3 obtains are stirred 60 minutes by step 4 at 70 DEG C,
It is evaporated and is ground to 500 mesh powder；
Powder obtained in step 4 is uniformly mixed with the pretreatment powder in step 1 to get cleansing composition by step 5；
Step 6, by the cleansing composition prepared in step 5 be filled in honeycomb strainer to get.
Embodiment 2
A kind of material for air purification, it is described net including honeycomb strainer and the cleansing composition for being filled in the honeycomb strainer
Change composition to be prepared by the raw material of following parts by weight: 19 parts of samaric sulfide, 22 parts of pucherite, 13 parts of ferrous tungstate, diatomite
12 parts, activity is native 9 parts recessed, 11 parts of hafnium hydroxide, 13 parts of lithium metaaluminate, 8 parts of iron oxide, 10 parts of chitin fiber, ox sulphur bear go
9 parts of oxycholic acid sodium, 12 parts of coconut shell powder, 7 parts of negative ion powder, 9 parts of leaf mould, 8 parts of polyvinyl alcohol, is gone 10 parts of graphene oxide
45 parts of ionized water.
Wherein, the negative ion powder be mass ratio be 1:3:1.8 Strange ice stone powder, albumen mountain flour, radium mountain flour mixture.
Wherein, the partial size of the samaric sulfide is 100-500nm.
The preparation method of the material for air purification, including following preparation step:
Coconut shell powder and leaf mould are uniformly mixed by step 1, prior to 800 DEG C at keep the temperature 8 hours, be cooled to room temperature, then
It is uniformly mixed with diatomite, the recessed soil of activity, keeps the temperature 4 hours at 1000 DEG C, cooled to room temperature is finely ground to be pre-processed
Powder；
Graphene oxide is placed in 1/4 deionized water by step 2, and ultrasonic disperse is uniform, and it is fine that chitosan is then added
Dimension, taurine sodium deoxycholate, continuation ultrasonic disperse is uniform, obtains mixed liquor M；
Iron oxide, lithium metaaluminate, samaric sulfide, pucherite, ferrous tungstate, hafnium hydroxide are placed in remaining deionization by step 3
It in water, is uniformly mixed, adds polyvinyl alcohol, continue to be uniformly mixed, obtain mixed liquor N；
The mixed liquor M that step 2 obtains and the mixed liquor N that step 3 obtains are stirred 150 points by step 4 at 90 DEG C
Clock is evaporated and is ground to 800 mesh powder；
Powder obtained in step 4 is uniformly mixed with the pretreatment powder in step 1 to get cleansing composition by step 5；
Step 6, by the cleansing composition prepared in step 5 be filled in honeycomb strainer to get.
Embodiment 3
A kind of material for air purification, it is described net including honeycomb strainer and the cleansing composition for being filled in the honeycomb strainer
Change composition to be prepared by the raw material of following parts by weight: 12 parts of samaric sulfide, 13 parts of pucherite, 7.8 parts of ferrous tungstate, diatomite
5.5 parts, activity it is recessed native 3.6 parts, 4.2 parts of hafnium hydroxide, 6.8 parts of lithium metaaluminate, 2.6 parts of iron oxide, 3.4 parts of chitin fiber,
4.5 parts of taurine sodium deoxycholate, 6.5 parts of graphene oxide, 5.8 parts of coconut shell powder, 3.7 parts of negative ion powder, leaf mould 4.5
Part, 2.5 parts of polyvinyl alcohol, 38 parts of deionized water.
Wherein, the negative ion powder be mass ratio be 1:3:1.8 Strange ice stone powder, albumen mountain flour, radium mountain flour mixture.
Wherein, the partial size of the samaric sulfide is 100-500nm.
The preparation method of the material for air purification, including following preparation step:
Coconut shell powder and leaf mould are uniformly mixed by step 1, prior to 750 DEG C at keep the temperature 6 hours, be cooled to room temperature, then
It is uniformly mixed with diatomite, the recessed soil of activity, keeps the temperature 3 hours at 900 DEG C, cooled to room temperature is finely ground to be pre-processed
Powder；
Graphene oxide is placed in 1/4 deionized water by step 2, and ultrasonic disperse is uniform, and it is fine that chitosan is then added
Dimension, taurine sodium deoxycholate, continuation ultrasonic disperse is uniform, obtains mixed liquor M；
Iron oxide, lithium metaaluminate, samaric sulfide, pucherite, ferrous tungstate, hafnium hydroxide are placed in remaining deionization by step 3
It in water, is uniformly mixed, adds polyvinyl alcohol, continue to be uniformly mixed, obtain mixed liquor N；
The mixed liquor M that step 2 obtains and the mixed liquor N that step 3 obtains are stirred 90 minutes by step 4 at 85 DEG C,
It is evaporated and is ground to 650 mesh powder；
Powder obtained in step 4 is uniformly mixed with the pretreatment powder in step 1 to get cleansing composition by step 5；
Step 6, by the cleansing composition prepared in step 5 be filled in honeycomb strainer to get.
Embodiment 4
A kind of material for air purification, it is described net including honeycomb strainer and the cleansing composition for being filled in the honeycomb strainer
Change composition to be prepared by the raw material of following parts by weight: 17 parts of samaric sulfide, 21 parts of pucherite, 11 parts of ferrous tungstate, diatomite
11.2 parts, activity it is recessed native 8.5 parts, 10.3 parts of hafnium hydroxide, 11 parts of lithium metaaluminate, 7.2 parts of iron oxide, 8.7 parts of chitin fiber,
8.4 parts of taurine sodium deoxycholate, 9.2 parts of graphene oxide, 11.4 parts of coconut shell powder, 6.4 parts of negative ion powder, leaf mould 8.3
Part, 7.3 parts of polyvinyl alcohol, 43 parts of deionized water.
Wherein, the negative ion powder be mass ratio be 1:3:1.8 Strange ice stone powder, albumen mountain flour, radium mountain flour mixture.
Wherein, the partial size of the samaric sulfide is 100-500nm.
The preparation method of the material for air purification, including following preparation step:
Coconut shell powder and leaf mould are uniformly mixed by step 1, prior to 750 DEG C at keep the temperature 7 hours, be cooled to room temperature, then
It is uniformly mixed with diatomite, the recessed soil of activity, keeps the temperature 3 hours at 950 DEG C, cooled to room temperature is finely ground to be pre-processed
Powder；
Graphene oxide is placed in 1/4 deionized water by step 2, and ultrasonic disperse is uniform, and it is fine that chitosan is then added
Dimension, taurine sodium deoxycholate, continuation ultrasonic disperse is uniform, obtains mixed liquor M；
Iron oxide, lithium metaaluminate, samaric sulfide, pucherite, ferrous tungstate, hafnium hydroxide are placed in remaining deionization by step 3
It in water, is uniformly mixed, adds polyvinyl alcohol, continue to be uniformly mixed, obtain mixed liquor N；
The mixed liquor M that step 2 obtains and the mixed liquor N that step 3 obtains are stirred 140 points by step 4 at 85 DEG C
Clock is evaporated and is ground to 600 mesh powder；
Powder obtained in step 4 is uniformly mixed with the pretreatment powder in step 1 to get cleansing composition by step 5；
Step 6, by the cleansing composition prepared in step 5 be filled in honeycomb strainer to get.
Embodiment 5
A kind of material for air purification, it is described net including honeycomb strainer and the cleansing composition for being filled in the honeycomb strainer
Change composition to be prepared by the raw material of following parts by weight: 15 parts of samaric sulfide, 19 parts of pucherite, 9.2 parts of ferrous tungstate, diatomite
6.8 parts, activity it is recessed native 5.7 parts, 7.8 parts of hafnium hydroxide, 9.2 parts of lithium metaaluminate, 5.4 parts of iron oxide, 6.2 parts of chitin fiber,
7 parts of taurine sodium deoxycholate, 7.2 parts of coconut shell powder, 5.8 parts of negative ion powder, 6 parts of leaf mould, is gathered 8.4 parts of graphene oxide
4.5 parts of vinyl alcohol, 41 parts of deionized water.
Wherein, the negative ion powder be mass ratio be 1:3:1.8 Strange ice stone powder, albumen mountain flour, radium mountain flour mixture.
Wherein, the partial size of the samaric sulfide is 100-500nm.
The preparation method of the material for air purification, including following preparation step:
Coconut shell powder and leaf mould are uniformly mixed by step 1, prior to 800 DEG C at keep the temperature 7 hours, be cooled to room temperature, then
It is uniformly mixed with diatomite, the recessed soil of activity, keeps the temperature 4 hours at 960 DEG C, cooled to room temperature is finely ground to be pre-processed
Powder；
Graphene oxide is placed in 1/4 deionized water by step 2, and ultrasonic disperse is uniform, and it is fine that chitosan is then added
Dimension, taurine sodium deoxycholate, continuation ultrasonic disperse is uniform, obtains mixed liquor M；
Iron oxide, lithium metaaluminate, samaric sulfide, pucherite, ferrous tungstate, hafnium hydroxide are placed in remaining deionization by step 3
It in water, is uniformly mixed, adds polyvinyl alcohol, continue to be uniformly mixed, obtain mixed liquor N；
The mixed liquor M that step 2 obtains and the mixed liquor N that step 3 obtains are stirred 120 points by step 4 at 88 DEG C
Clock is evaporated and is ground to 700 mesh powder；
Powder obtained in step 4 is uniformly mixed with the pretreatment powder in step 1 to get cleansing composition by step 5；
Step 6, by the cleansing composition prepared in step 5 be filled in honeycomb strainer to get.
Comparative example 1
It is only that in place of this comparative example and the difference of embodiment 1: not adding hafnium hydroxide, pucherite and graphene oxide.
Comparative example 2
It is only that in place of this comparative example and the difference of embodiment 1: not adding coconut shell powder, samaric sulfide and leaf mould.
Performance test
Correlated performance test is carried out to material for air purification prepared by embodiment 1-5 and comparative example 1,2, is by PM2.5
500 pollution air is with the speed of 1 meter per second by above-mentioned material for air purification, and test result is as follows shown in table:
By the above test result it is found that material for air purification provided by the invention to the filterability of PM2.5 be up to 99.2 and
More than it, at the same to the purification efficiency of formaldehyde, benzene pernicious gas in air respectively be up to 95.3% and 92.7% and its more than,
Air effectively has been purified, air environment can be significantly improved.The good permeability of the material for air purification has the function of purification air
Can, it is very suitable to produce in enormous quantities and its apply.
Claims (5)
1. a kind of preparation method of material for air purification, which is characterized in that including following preparation step:
Coconut shell powder and leaf mould are uniformly mixed by step 1, prior to 720 DEG C at keep the temperature 6 hours, be cooled to room temperature, then with silicon
The recessed soil of diatomaceous earth, activity is uniformly mixed, and keeps the temperature 2 hours at 950 DEG C, and cooled to room temperature is finely ground to obtain pretreatment powder；
Graphene oxide is placed in 1/4 deionized water by step 2, and ultrasonic disperse is uniform, and chitin fiber, ox is then added
Sulphur sodium ursodexoxycholate, continuation ultrasonic disperse is uniform, obtains mixed liquor M；
Iron oxide, lithium metaaluminate, samaric sulfide, pucherite, ferrous tungstate, hafnium hydroxide are placed in remaining deionized water by step 3
In, it is uniformly mixed, adds polyvinyl alcohol, continue to be uniformly mixed, obtain mixed liquor N；
The mixed liquor M that step 2 obtains and the mixed liquor N that step 3 obtains are stirred 120 minutes by step 4 at 85 DEG C, are steamed
Dry doubling is ground to 500-800 mesh powder；
Powder obtained in step 4 is uniformly mixed with the pretreatment powder in step 1 to get cleansing composition by step 5；
Step 6, by the cleansing composition prepared in step 5 be filled in honeycomb strainer to get.
2. the preparation method of material for air purification according to claim 1, which is characterized in that the cleansing composition by with
The raw material of lower parts by weight is prepared: 11-19 parts of samaric sulfide, 12-22 parts of pucherite, 7-13 parts of ferrous tungstate, diatomite 5-12
Part, recessed 3-9 parts of the soil of activity, 4-11 parts of hafnium hydroxide, 6-13 parts of lithium metaaluminate, 2-8 parts of iron oxide, 3-10 parts of chitin fiber,
4-9 parts of taurine sodium deoxycholate, 6-10 parts of graphene oxide, 5-12 parts of coconut shell powder, 3-7 parts of negative ion powder, leaf mould 4-9
Part, 2-8 parts of polyvinyl alcohol, 36-45 parts of deionized water.
3. the preparation method of material for air purification according to claim 1, which is characterized in that the negative ion powder is quality
Than for the Strange ice stone powder of 1:3:1.8, albumen mountain flour, radium mountain flour mixture.
4. the preparation method of material for air purification according to claim 1, which is characterized in that the partial size of the samaric sulfide is
100-500nm。
5. the preparation method of material for air purification according to claim 1, which is characterized in that the cleansing composition by with
The raw material of lower parts by weight is prepared: 12-17 parts of samaric sulfide, 13-21 parts of pucherite, 7.8-11 parts of ferrous tungstate, diatomite
5.5-11.2 parts, recessed 3.6-8.5 parts of the soil of activity, 4.2-10.3 parts of hafnium hydroxide, 6.8-11 parts of lithium metaaluminate, iron oxide 2.6-
7.2 parts, 3.4-8.7 parts of chitin fiber, 4.5-8.4 parts of taurine sodium deoxycholate, 6.5-9.2 parts of graphene oxide, coconut
5.8-11.4 parts of shell powder, 3.7-6.4 parts of negative ion powder, 4.5-8.3 parts of leaf mould, 2.5-7.3 parts of polyvinyl alcohol, deionized water
38-43 parts.
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| US20220193632A1 (en) * | 2020-12-22 | 2022-06-23 | National Tsing Hua University | Calcined hierarchical porous composite |
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| CN108970582A (en) * | 2018-07-30 | 2018-12-11 | 深圳市心版图科技有限公司 | A kind of material and preparation method thereof for air cleaning |
| CN116059836A (en) * | 2022-08-18 | 2023-05-05 | 麦智钜 | Preparation method and application of bismuth ion filter membrane |
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Also Published As
| Publication number | Publication date |
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| CN106310821A (en) | 2017-01-11 |
| CN106310821B (en) | 2018-12-21 |
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