CN110102289A - A kind of netted perovskite catalyst of doughnut and the preparation method and application thereof - Google Patents
A kind of netted perovskite catalyst of doughnut and the preparation method and application thereof Download PDFInfo
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- CN110102289A CN110102289A CN201910307084.6A CN201910307084A CN110102289A CN 110102289 A CN110102289 A CN 110102289A CN 201910307084 A CN201910307084 A CN 201910307084A CN 110102289 A CN110102289 A CN 110102289A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 72
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 235000012489 doughnuts Nutrition 0.000 title claims abstract description 23
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 34
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910002075 lanthanum strontium manganite Inorganic materials 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims abstract description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 81
- 229910052751 metal Inorganic materials 0.000 claims description 64
- 239000002184 metal Substances 0.000 claims description 64
- 239000012266 salt solution Substances 0.000 claims description 63
- 239000000243 solution Substances 0.000 claims description 60
- 239000011259 mixed solution Substances 0.000 claims description 42
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 37
- 238000003756 stirring Methods 0.000 claims description 36
- 239000002243 precursor Substances 0.000 claims description 34
- 229910021645 metal ion Inorganic materials 0.000 claims description 32
- 238000009987 spinning Methods 0.000 claims description 32
- DHEQXMRUPNDRPG-UHFFFAOYSA-N strontium nitrate Chemical compound [Sr+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O DHEQXMRUPNDRPG-UHFFFAOYSA-N 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000001354 calcination Methods 0.000 claims description 16
- 229960000935 dehydrated alcohol Drugs 0.000 claims description 16
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 16
- 238000011049 filling Methods 0.000 claims description 15
- 238000004090 dissolution Methods 0.000 claims description 13
- 230000003197 catalytic effect Effects 0.000 claims description 6
- 238000000746 purification Methods 0.000 claims description 4
- 229910004416 SrxMnO3 Inorganic materials 0.000 claims description 2
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 34
- 238000006243 chemical reaction Methods 0.000 abstract description 22
- 229910052799 carbon Inorganic materials 0.000 abstract description 20
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 15
- 239000004071 soot Substances 0.000 abstract description 8
- 239000003960 organic solvent Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract description 3
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 abstract 1
- 231100000719 pollutant Toxicity 0.000 abstract 1
- 229910000473 manganese(VI) oxide Inorganic materials 0.000 description 34
- 229910052738 indium Inorganic materials 0.000 description 22
- 238000002474 experimental method Methods 0.000 description 15
- 239000008367 deionised water Substances 0.000 description 14
- 229910021641 deionized water Inorganic materials 0.000 description 14
- ZWWCURLKEXEFQT-UHFFFAOYSA-N dinitrogen pentoxide Inorganic materials [O-][N+](=O)O[N+]([O-])=O ZWWCURLKEXEFQT-UHFFFAOYSA-N 0.000 description 14
- XQBXQQNSKADUDV-UHFFFAOYSA-N lanthanum;nitric acid Chemical compound [La].O[N+]([O-])=O XQBXQQNSKADUDV-UHFFFAOYSA-N 0.000 description 14
- 238000005259 measurement Methods 0.000 description 14
- 238000012360 testing method Methods 0.000 description 14
- 239000007788 liquid Substances 0.000 description 13
- 235000019441 ethanol Nutrition 0.000 description 11
- 229960004756 ethanol Drugs 0.000 description 10
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000004321 preservation Methods 0.000 description 8
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 240000003273 Passiflora laurifolia Species 0.000 description 5
- 235000013762 Passiflora laurifolia Nutrition 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 238000005352 clarification Methods 0.000 description 5
- 239000002121 nanofiber Substances 0.000 description 4
- 235000005979 Citrus limon Nutrition 0.000 description 3
- 244000131522 Citrus pyriformis Species 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002204 La0.8Sr0.2MnO3 Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000009938 salting Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910002148 La0.6Sr0.4MnO3 Inorganic materials 0.000 description 1
- 229910002182 La0.7Sr0.3MnO3 Inorganic materials 0.000 description 1
- 208000036142 Viral infection Diseases 0.000 description 1
- 239000003708 ampul Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002070 nanowire Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/32—Manganese, technetium or rhenium
- B01J23/34—Manganese
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
- B01J35/64—Pore diameter
- B01J35/651—50-500 nm
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
Abstract
The invention discloses netted perovskite catalysts of a kind of doughnut and the preparation method and application thereof.The chemical formula general formula of the catalyst is La1‑xSrxMnO3, 0≤x≤0.4, the catalyst is in netted, and the duct with hollow tubular, aperture is in 200 ~ 300 nm.Electrostatic spinning is carried out as dicyandiamide solution using water-ethanol, avoids introducing the organic solvent being harmful to the human body, system Environmental Safety.The carbon soot particles in exhaust gas from diesel vehicle can be captured and increase the touch opportunity of active catalyst sites and soot, nitrogen oxides, collaboration removes soot and nitrogen oxides, reduces the discharge amount of pollutant in tail gas.Simulating while eliminating there is good activity in exhaust gas from diesel vehicle in the reaction of the nitrogen oxides of soot sum, carbon soot particles burning peak temperature is 360 DEG C, and NO maximum conversion rate is 40%, and peak temperature is 380 DEG C.
Description
Technical field
The invention belongs to the technical field of exhaust gas from diesel vehicle catalyst, in particular to a kind of netted perovskite of doughnut is urged
Agent and the preparation method and application thereof.
Background technique
Diesel vehicle has many advantages, such as that the thermal efficiency is higher, economy is stronger, before possessing wide market compared with gasoline car
Scape.Vehicle exhaust main component is PM (soot), NOx(nitrogen oxides), CO (carbon monoxide), CxHy(hydrocarbon) four
Kind, and exhaust gas from diesel vehicle is with PM and NOxBased on.As increasingly strict national environmental protection laws and regulations are put into effect, exhaust gas from diesel vehicle
Content is discharged by tightened up concern, is a current research hotspot.The main minimizing technology of PM is to fill by tail gas filtering
It sets and filters PM, using the catalyst loaded on filter device, under delivery temperature, PM is oxidized to carbon dioxide.And for
NOx, then nitrogen is catalysed and reduced into using the catalyst loaded in tail gas unit.Using certain catalyst simultaneously by diesel vehicle
PM, NO in tail gasx、CO、CxHyThe technology of removal is known as Emission control technology simultaneously.
PM of a large amount of document report perocskite type composite oxide catalysts in collaboration removal exhaust gas from diesel vehicle and
NOxAspect is with good performance.Since perovskite-type rare-earth composite oxides catalyst is cheap, there is good catalysis
Active and good thermal stability, by favor in exhaust gas from diesel vehicle catalytic treatment technology.
Catalytic effect is usually related with the pattern of catalyst granules, specific surface area etc..However, powder catalyst particle
Diameter (be greater than 25 nanometer) of the aperture (less than 10 nanometers) less than PM, this would generally contact of the limiting catalyst with PM, reduction urges
The effect for changing purification PM, because in the impermeable inner hole to catalyst of PM.
Electrostatic spinning technique is a kind of technology of acquisition nanofiber easy to operate, can obtain continuous Nanowire
Dimension.The advantage for usually having large specific surface area, porosity high by the nanofiber that electrostatic spinning obtains.Electrostatic spinning technique can
To be used to prepare the nanofiber of inorganic composite oxide.It is all largely currently to utilize certain about the research of electrostatic spinning technique
A little solvents of the toxic organic solvent as spinning precursor solution, such as common DMF (n,N-Dimethylformamide), because this
Part organic solvent is readily volatilized, plays a significant role to nanofiber pattern is stablized.However the organic solvents such as DMF are easy to wave
Hair, it is both larger to human health damage, air quality also is influenced simultaneously, it is higher to the experimental work environmental requirement of spinning.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is lead for perovskite powders shape catalyst granules aperture is smaller
Cause is not easy to contact with PM, and organic solvent is commonly used in electrostatic spinning technique and has virose deficiency, provides a kind of for diesel vehicle
The preparation method of the netted perovskite catalyst of the doughnut of tail gas catalytic purification.
Goal of the invention of the invention is mainly realized through the following technical scheme.
The present invention provides a kind of netted perovskite catalyst of doughnut, the chemical formula general formula of the catalyst is La1- xSrxMnO3, 0≤x≤0.4, the catalyst is in netted, and the duct with hollow tubular, aperture is in 200~300nm.
The present invention also provides a kind of preparation method of netted perovskite catalyst of doughnut as described above, the methods
Including following preparation step:
(1) preparation of precursor solution
Prepare ethanol water；By La1-xSrxMnO3Stoichiometric ratio weighs lanthanum nitrate, strontium nitrate, manganese nitrate and is dissolved in second
In alcohol solution, dissolution is stirred at room temperature, obtains metal salt solution；Next weighs citric acid and is placed in metal salt solution, continues
Stirring to metal salt solution is clarified, and mixed solution is obtained；PVP is finally weighed to pour into the container for filling mixed solution, it is lasting to stir
1~24 hour, obtain clear precursor solution；
(2) electrostatic spinning
Precursor solution is added in the syringe with syringe needle, syringe needle is clamped using high-voltage positive electrode power supply and is made
For anode, input voltage is 0~30Kv, and sample rate is 1~20 μ L/min, and the needle sizes of syringe are 18~21G；Using
Roller collects electrostatic spinning sample, and spray head and the roller distance of electrostatic spinning apparatus are 10~30cm, and spinning temperature is 25~50
DEG C, relative humidity is 10%~50%；
(3) it calcines
It after the electrostatic spinning sample collection of step (2), is placed in baking oven, in 50~80 DEG C of freeze-day with constant temperature；It takes out, places
Heating calcining, temperature program are carried out in Muffle furnace are as follows: be heated to 400~800 DEG C from room temperature, 400~800 DEG C at a temperature of
Heat preservation, is cooled to room temperature, obtains the netted perovskite catalyst of doughnut.
Preferably, the volume ratio of water and dehydrated alcohol is (0.1~100) in step (1) ethanol water: 1.
Preferably, the molar concentration of metal ion is 0.1~5mol/L in step (1) metal salt solution.
Preferably, the molar ratio of the metal ion in step (1) in metal salt solution and citric acid is 1:(0.5~10).
Preferably, the mass ratio of mixed solution and PVP are (1~100) in step (1): 1.
Preferably, in step (3), electrostatic spinning sample 1~12h of freeze-day with constant temperature in 50~80 DEG C of baking oven.
Preferably, the rate to heat up in step (3) is 2~10 DEG C/min.
Preferably, in step (3) electrostatic spinning sample in muffle furnace 400~800 DEG C at a temperature of heat preservation 2~
10h。
The present invention also provides a kind of netted perovskite catalysts of doughnut in exhaust gas from diesel vehicle catalytic purification
Using.
Compared to the prior art, the present invention prepares the netted perovskite catalyst of doughnut using electrostatic spinning technique and has
Advantage:
(1) electrostatic spinning technique utilizes water-ethanol dicyandiamide solution, other no added common toxic organic solvents, to people
Body harm is smaller, and environmentally friendly, spining technology is easy to operate, and raw material is easy to get.
(2) fibrous web-like perovskite catalyst made from has the channel of hollow tubular, and aperture is in 200~300nm；It urges
Agent is integrally in net distribution.
(3) catalyst invented is simulating while eliminating in exhaust gas from diesel vehicle and have in the reaction of the nitrogen oxides of soot sum
Good activity, carbon soot particles burning peak temperature is 360 DEG C, and NO maximum conversion rate is 40%, and corresponding peak temperature is 380 DEG C.
Detailed description of the invention
Fig. 1 is the catalyst La that embodiment 1 provides0.9Sr0.1MnO3SEM figure；
Fig. 2 is the catalyst La that embodiment 1 provides0.9Sr0.1MnO3TEM figure.
Specific embodiment
Embodiment 1
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.9Sr0.1MnO3, the system of the catalyst
Preparation Method the following steps are included:
(1) measurement 10mL deionized water, 5mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
To be dissolved in ethyl alcohol water-soluble for 2.456g anhydrous nitric acid lanthanum, 0.178g strontium nitrate, manganese nitrate solution that 3.008g mass fraction is 50%
In liquid, dissolution is stirred at room temperature, obtains metal salt solution, concentration of metal ions 1.12mol/L.Weigh a water lemon of 3.528g
For lemon acid in metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:1, continues to stir
It is clarified to metal salt solution, obtains mixed solution.Then it weighs 11.5g PVP (K90) to pour into the beaker for filling mixed solution, mix
The mass ratio for closing solution and the PVP is 2:1, persistently stirs 6 hours, obtains clear precursor solution.
(2) precursor solution is added in syringe, input voltage 10Kv, sample rate is 5 μ L/min, syringe needle ruler
Very little is 18G.Spinning sample is collected using roller, spray head and roller distance are 10cm, and spinning temperature is 30 DEG C, and relative humidity is
10%.
(3) it by after sample collection obtained by electrostatic spinning, is placed in baking oven, in 50 DEG C of freeze-day with constant temperature 6h.It then takes out, places
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 2 DEG C/min, be heated to 600 DEG C from room temperature, heat preservation
Then 2h is cooled to room temperature with Muffle furnace, obtain La0.9Sr0.1MnO3。
The netted perovskite catalyst of doughnut is for simulating while eliminating PM and NO in exhaust gas from diesel vehiclex, step
Are as follows:
It is carried out in atmospheric fixed bed miniature quartz pipe reactor (internal diameter 6mm), controls reaction temperature using automatic temperature control instrument
Degree.Select NO in NO (1000ppm) simulation exhaust gas from diesel vehiclex, active carbon (200 mesh) simulate exhaust gas from diesel vehicle in PM.It will hair
The bright netted perovskite catalyst of the doughnut and PM mass ratio are 10:1 ground and mixed, obtain milled mixtures, weigh 100mg
Milled mixtures are filled in quartz ampoule.CO in product after reaction2Concentration utilizes Agilent 7820A gas chromatographic detection, and NO is dense
Degree is detected using the triumphant grace KANE905 hand-held flue gas analyzer of Britain.Reaction atmosphere is 1000ppmNO, 5%O2, Balance Air is
N2, gas overall flow rate is 100mL/min, air speed 21000h-1.Temperature program(me) are as follows: 200 DEG C are risen to from room temperature with 3 DEG C/min,
Stablize 1~2 hour in 200 DEG C of constant temperature；500 DEG C are risen to 3 DEG C/min again, one data of every 20 DEG C of records.Turned with the maximum of NO
Rate (%) and corresponding peak temperature (DEG C) indicate the clean-up effect of NO, with CO in gas after reaction2When concentration reaches maximum value
Peak temperature of burning (DEG C) indicates the catalytic effect to PM.Material obtained is tested using SEM and TEM.Fig. 1 is shown by SEM and is obtained
The material obtained has opening in threadiness, in fiber ends, and Fig. 2 is that TEM result further confirms, which has cavity,
The sample for illustrating this experiment preparation is hollow fiber material, and aperture is in 200~300nm.
By La provided in this embodiment0.9Sr0.1MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 400 DEG C, and NO maximum conversion rate is 10%, and peak temperature is 400 DEG C.
Embodiment 2
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.9Sr0.1MnO3, the system of the catalyst
Preparation Method the following steps are included:
Measurement 10mL deionized water, 5mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
To be dissolved in ethyl alcohol water-soluble for 2.456g anhydrous nitric acid lanthanum, 0.178g strontium nitrate, manganese nitrate solution that 3.008g mass fraction is 50%
In liquid, dissolution is stirred at room temperature, obtains metal salt solution, concentration of metal ions 1.12mol/L.Weigh a water of 3.528g
For citric acid in metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:1, continues to stir
It mixes to metal salt solution and clarifies, obtain mixed solution.Then 1.16g PVP (K90) is weighed to pour into the beaker for filling mixed solution,
The mass ratio of mixed solution and the PVP are 20:1, persistently stir 6 hours, obtain clear precursor solution.
Precursor solution is added in syringe, input voltage 10Kv, sample rate is 5 μ L/min, needle sizes
For 18G.Spinning sample is collected using roller, spray head and roller distance are 10cm, and spinning temperature is 30 DEG C, and relative humidity is
10%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 50 DEG C of freeze-day with constant temperature 6h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 2 DEG C/min, 600 DEG C are heated to from room temperature, keeps the temperature 2h,
Then it is cooled to room temperature with Muffle furnace, obtains La0.9Sr0.1MnO3。
By La provided in this embodiment0.9Sr0.1MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 360 DEG C, and NO maximum conversion rate is 40%, and peak temperature is 380 DEG C.
Embodiment 3
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.9Sr0.1MnO3, the system of the catalyst
Preparation Method the following steps are included:
Measurement 10mL deionized water, 5mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
To be dissolved in ethyl alcohol water-soluble for 2.456g anhydrous nitric acid lanthanum, 0.178g strontium nitrate, manganese nitrate solution that 3.008g mass fraction is 50%
In liquid, dissolution is stirred at room temperature, obtains metal salt solution, concentration of metal ions 1.12mol/L.Weigh a water of 3.528g
For citric acid in metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:1, continues to stir
It mixes to metal salt solution and clarifies, obtain mixed solution.Then 0.46g PVP (K90) is weighed to pour into the beaker for filling mixed solution,
The mass ratio of mixed solution and the PVP are 50:1, persistently stir 6 hours, obtain clear precursor solution.
Precursor solution is added in syringe, input voltage 10Kv, sample rate is 5 μ L/min, needle sizes
For 18G.Spinning sample is collected using roller, spray head and roller distance are 10cm, and spinning temperature is 30 DEG C, and relative humidity is
10%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 50 DEG C of freeze-day with constant temperature 6h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 2 DEG C/min, 600 DEG C are heated to from room temperature, keeps the temperature 2h,
Then it is cooled to room temperature with Muffle furnace, obtains La0.9Sr0.1MnO3。
By La provided in this embodiment0.9Sr0.1MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 380 DEG C, and NO maximum conversion rate is 30%, and peak temperature is 400 DEG C.
Embodiment 4
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.9Sr0.1MnO3, the system of the catalyst
Preparation Method the following steps are included:
Measurement 10mL deionized water, 5mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
To be dissolved in ethyl alcohol water-soluble for 2.456g anhydrous nitric acid lanthanum, 0.178g strontium nitrate, manganese nitrate solution that 3.008g mass fraction is 50%
In liquid, dissolution is stirred at room temperature, obtains metal salt solution, concentration of metal ions 1.12mol/L.Weigh a water of 3.528g
For citric acid in metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:1, continues to stir
It mixes to metal salt solution and clarifies, obtain mixed solution.Then 0.2g PVP (K90) is weighed to pour into the beaker for filling mixed solution,
The mass ratio of mixed solution and the PVP are 100:1, persistently stir 6 hours, obtain clear precursor solution.
Precursor solution is added in syringe, input voltage 15Kv, sample rate is 10 μ L/min, needle sizes
For 18G.Spinning sample is collected using roller, spray head and roller distance are 15cm, and spinning temperature is 30 DEG C, and relative humidity is
20%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 60 DEG C of freeze-day with constant temperature 6h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 5 DEG C/min, 650 DEG C are heated to from room temperature, keeps the temperature 4h,
Then it is cooled to room temperature with Muffle furnace, obtains La0.9Sr0.1MnO3。
By La provided in this embodiment0.9Sr0.1MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 400 DEG C, and NO maximum conversion rate is 7%, and peak temperature is 420 DEG C.
Embodiment 5
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.8Sr0.2MnO3, the system of the catalyst
Preparation Method the following steps are included:
Measurement 10mL deionized water, 5mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.
2.236g anhydrous nitric acid lanthanum, 0.365g strontium nitrate, 3.079g mass fraction are referred to as 50% manganese nitrate solution dissolution
In ethanol water, dissolution is stirred at room temperature, obtains metal salt solution, concentration of metal ions 1.15mol/L.It weighs
In metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is the Citric Acid Mono of 1.806g
1:0.5 continues stirring to metal salt solution and clarifies, obtains mixed solution.Then it weighs 1.071g PVP (K90) and pours into and fill mixing
In the beaker of solution, the mass ratio of mixed solution and the PVP are 20:1, persistently stir 6 hours, it is molten to obtain clear presoma
Liquid.
Precursor solution is added in syringe, input voltage 15Kv, sample rate is 10 μ L/min, needle sizes
For 19G.Spinning sample is collected using roller, spray head and roller distance are 15cm, and spinning temperature is 30 DEG C, and relative humidity is
20%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 60 DEG C of freeze-day with constant temperature 6h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 5 DEG C/min, 650 DEG C are heated to from room temperature, keeps the temperature 4h,
Then it is cooled to room temperature with Muffle furnace, obtains La0.8Sr0.2MnO3。
By La provided in this embodiment0.8Sr0.2MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 400 DEG C, and NO maximum conversion rate is 12%, and peak temperature is 400 DEG C.
Embodiment 6
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.8Sr0.2MnO3, the system of the catalyst
Preparation Method the following steps are included:
Measurement 2mL deionized water, 20mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
To be dissolved in ethyl alcohol water-soluble for 2.236g anhydrous nitric acid lanthanum, 0.365g strontium nitrate, manganese nitrate solution that 3.079g mass fraction is 50%
In liquid, dissolution is stirred at room temperature, obtains metal salt solution, concentration of metal ions 0.78mol/L.Weigh a water of 3.612g
For citric acid in metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:1, continues to stir
It is clarified to metal salt solution, obtains mixed solution.Then 1.354g PVP (K90) is weighed to pour into the beaker for filling mixed solution,
The mass ratio of mixed solution and the PVP are 20:1, stir 12 hours persistently to get clarification precursor solution.
Precursor solution is added in syringe, input voltage 15Kv, sample rate is 10 μ L/min, needle sizes
For 19G.Spinning sample is collected using roller, spray head and roller distance are 15cm, and spinning temperature is 40 DEG C, and relative humidity is
20%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 60 DEG C of freeze-day with constant temperature 8h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 5 DEG C/min, 650 DEG C are heated to from room temperature, keeps the temperature 4h,
Then it is cooled to room temperature with Muffle furnace, obtains La0.8Sr0.2MnO3。
By La provided in this embodiment0.8Sr0.2MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 380 DEG C, and NO maximum conversion rate is 20%, and peak temperature is 400 DEG C.
Embodiment 7
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.8Sr0.2MnO3, the system of the catalyst
Preparation Method the following steps are included:
Measurement 20mL deionized water, 2mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
To be dissolved in ethyl alcohol water-soluble for 2.236g anhydrous nitric acid lanthanum, 0.365g strontium nitrate, manganese nitrate solution that 3.079g mass fraction is 50%
In liquid, dissolution is stirred at room temperature, obtains metal salt solution, concentration of metal ions 0.78mol/L.Weigh a water of 18.060g
For citric acid in metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:5, continues to stir
It is clarified to metal salt solution, obtains mixed solution.Then 2.266g PVP (K90) is weighed to pour into the beaker for filling mixed solution,
The mass ratio of mixed solution and the PVP are 20:1, stir 18 hours persistently to get clear precursor solution.
Precursor solution is added in syringe, input voltage 20Kv, sample rate is 15 μ L/min, needle sizes
For 19G.Spinning sample is collected using roller, spray head and roller distance are 20cm, and spinning temperature is 40 DEG C, and relative humidity is
30%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 70 DEG C of freeze-day with constant temperature 8h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 8 DEG C/min, 700 DEG C are heated to from room temperature, keeps the temperature 6h,
Then La is cooled to room temperature to obtain with Muffle furnace0.8Sr0.2MnO3。
By La provided in this embodiment0.8Sr0.2MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 380 DEG C, and NO maximum conversion rate is 23%, and peak temperature is 400 DEG C.
Embodiment 8
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.8Sr0.2MnO3, the system of the catalyst
Preparation Method the following steps are included:
Measurement 100mL deionized water, 1mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
To be dissolved in ethyl alcohol water-soluble for 2.236g anhydrous nitric acid lanthanum, 0.365g strontium nitrate, manganese nitrate solution that 3.079g mass fraction is 50%
In liquid, dissolution is stirred at room temperature, obtains metal salt solution, concentration of metal ions 0.17mol/L.Weigh a water of 36.120g
In citric acid metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:10, continues to stir
It is clarified to metal salt solution, obtains mixed solution.Then 7.129g PVP (K90) is weighed to pour into the beaker for filling mixed solution,
The mass ratio of mixed solution and the PVP are 20:1, stir 18 hours persistently to get clear precursor solution.
Precursor solution is added in syringe, input voltage 20Kv, sample rate is 15 μ L/min, needle sizes
For 19G.Spinning sample is collected using roller, spray head and roller distance are 20cm, and spinning temperature is 40 DEG C, and relative humidity is
30%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 70 DEG C of freeze-day with constant temperature 8h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 8 DEG C/min, 700 DEG C are heated to from room temperature, keeps the temperature 6h,
Then La is cooled to room temperature to obtain with Muffle furnace0.8Sr0.2MnO3。
By La provided in this embodiment0.8Sr0.2MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 420 DEG C, and NO maximum conversion rate is 10%, and peak temperature is 420 DEG C.
Embodiment 9
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.7Sr0.3MnO3, the system of the catalyst
Preparation Method the following steps are included:
Measurement 2mL deionized water, 20mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
To be dissolved in ethyl alcohol water-soluble for 2.025g anhydrous nitric acid lanthanum, 0.566g strontium nitrate, manganese nitrate solution that 3.186g mass fraction is 50%
In liquid, dissolution is stirred at room temperature, obtains metal salt solution, concentration of metal ions 0.81mol/L.Weigh a water of 3.738g
For citric acid in metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:1, continues to stir
It is clarified to metal salt solution, obtains mixed solution.Then 1.365g PVP (K90) is weighed to pour into the beaker for filling mixed solution,
The mass ratio of mixed solution and the PVP are 20:1, stir 24 hours persistently to get clear precursor solution.
Precursor solution is added in syringe, input voltage 20Kv, sample rate is 15 μ L/min, needle sizes
For 20G.Spinning sample is collected using roller, spray head and roller distance are 20cm, and spinning temperature is 40 DEG C, and relative humidity is
30%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 70 DEG C of freeze-day with constant temperature 10h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 8 DEG C/min, 700 DEG C are heated to from room temperature, keeps the temperature 6h,
Then La is cooled to room temperature to obtain with Muffle furnace0.7Sr0.3MnO3。
By La provided in this embodiment0.7Sr0.3MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 380 DEG C, and NO maximum conversion rate is 16%, and peak temperature is 400 DEG C.
Embodiment 10
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.7Sr0.3MnO3, the system of the catalyst
Preparation Method the following steps are included:
Measurement 10mL deionized water, 5mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
To be dissolved in ethyl alcohol water-soluble for 2.025g anhydrous nitric acid lanthanum, 0.566g strontium nitrate, manganese nitrate solution that 3.186g mass fraction is 50%
In liquid, stirring and dissolving, obtains metal salt solution, concentration of metal ions 1.19mol/L at room temperature.Weigh a water lemon of 3.738g
For lemon acid in metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:1, continues stirring extremely
Metal salt solution clarification, obtains mixed solution.Then it weighs 1.173g PVP (K90) to pour into the beaker for filling mixed solution, mix
The mass ratio for closing solution and the PVP is 20:1, stirs 24 hours persistently to get clear precursor solution.
Precursor solution is added in syringe, input voltage 25Kv, sample rate is 20 μ L/min, needle sizes
For 20G.Spinning sample is collected using roller, spray head and roller distance are 25cm, and spinning temperature is 40 DEG C, and relative humidity is
40%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 80 DEG C of freeze-day with constant temperature 10h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 10 DEG C/min, be heated to 750 DEG C from room temperature, heat preservation
Then 8h is cooled to room temperature with Muffle furnace, obtain La0.7Sr0.3MnO3。
By La provided in this embodiment0.7Sr0.3MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 380 DEG C, and NO maximum conversion rate is 25%, and peak temperature is 400 DEG C.
Embodiment 11
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.6Sr0.4MnO3, the system of the catalyst
Preparation Method the following steps are included:
Measurement 20mL deionized water, 10mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
14.625g anhydrous nitric acid lanthanum, 6.360g strontium nitrate, the manganese nitrate solution that 26.85g mass fraction is 50% are dissolved in ethanol water
In solution, stirring and dissolving, obtains metal salt solution, concentration of metal ions 5mol/L at room temperature.Weigh a water lemon of 31.500g
For acid in metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:1, continues stirring to gold
Belong to salting liquid clarification, obtains mixed solution.Then it weighs 5.361g PVP (K90) to pour into the beaker for filling mixed solution, mix
The mass ratio of solution and the PVP are 20:1, stir 24 hours persistently to get clear precursor solution.
Precursor solution is added in syringe, input voltage 25Kv, sample rate is 20 μ L/min, needle sizes
For 20G.Spinning sample is collected using roller, spray head and roller distance are 25cm, and spinning temperature is 50 DEG C, and relative humidity is
40%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 80 DEG C of freeze-day with constant temperature 10h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 10 DEG C/min, be heated to 750 DEG C from room temperature, heat preservation
Then 8h is cooled to room temperature to obtain La with Muffle furnace0.6Sr0.4MnO3。
By La provided in this embodiment0.6Sr0.4MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 400 DEG C, and NO maximum conversion rate is 17%, and peak temperature is 400 DEG C.
Embodiment 12
It is La the present embodiment provides a kind of netted perovskite catalyst of doughnut0.6Sr0.4MnO3, the system of the catalyst
Preparation Method the following steps are included:
Measurement 10mL deionized water, 5mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
To be dissolved in ethyl alcohol water-soluble for 1.755g anhydrous nitric acid lanthanum, 0.763g strontium nitrate, manganese nitrate solution that 3.222g mass fraction is 50%
In liquid, stirring and dissolving, obtains metal salt solution, concentration of metal ions 1.2mol/L at room temperature.Weigh a water lemon of 3.780g
For acid in metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:1, continues stirring to gold
Belong to salting liquid clarification, obtains mixed solution.Then it weighs 1.173g PVP (K90) to pour into the beaker for filling mixed solution, mix
The mass ratio of solution and the PVP are 20:1, stir 24 hours persistently to get clear precursor solution.
Precursor solution is added in syringe, input voltage 25Kv, sample rate is 20 μ L/min, needle sizes
For 20G.Spinning sample is collected using roller, spray head and roller distance are 25cm, and spinning temperature is 50 DEG C, and relative humidity is
40%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 80 DEG C of freeze-day with constant temperature 10h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 10 DEG C/min, be heated to 750 DEG C from room temperature, heat preservation
Then 8h is cooled to room temperature with Muffle furnace, obtain La0.6Sr0.4MnO3。
By La provided in this embodiment0.6Sr0.4MnO3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment
In, PM burning peak temperature is 380 DEG C, and NO maximum conversion rate is 30%, and peak temperature is 400 DEG C.
Embodiment 13
It is LaMnO the present embodiment provides a kind of netted perovskite catalyst of doughnut3, the preparation method of the catalyst
The following steps are included:
Measurement 10mL deionized water, 5mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.Claim
2.698g anhydrous nitric acid lanthanum, the manganese nitrate solution that 2.971g mass fraction is 50% are dissolved in ethanol water, at room temperature
Stirring and dissolving obtains metal salt solution, concentration of metal ions 1.11mol/L.The Citric Acid Mono of 6.972g is weighed in metal salt
In solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:2, and it is clear to metal salt solution to continue stirring
Clearly, mixed solution is obtained.Then it weighs 1.329g PVP (K90) to pour into the beaker for filling mixed solution, mixed solution and described
The mass ratio of PVP is 20:1, stirs 6 hours persistently to get clear precursor solution.
Precursor solution is added in syringe, input voltage 30Kv, sample rate is 20 μ L/min, needle sizes
For 21G.Spinning sample is collected using roller, spray head and roller distance are 30cm, and spinning temperature is 50 DEG C, and relative humidity is
50%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 80 DEG C of freeze-day with constant temperature 12h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 10 DEG C/min, be heated to 800 DEG C from room temperature, heat preservation
Then 10h is cooled to room temperature to obtain LaMnO with Muffle furnace3。
By LaMnO provided in this embodiment3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment in, PM combustion
Burning peak temperature is 380 DEG C, and NO maximum conversion rate is 25%, and peak temperature is 380 DEG C.
Embodiment 14
It is LaMnO the present embodiment provides a kind of netted perovskite catalyst of doughnut3, the preparation method of the catalyst
The following steps are included:
Measurement 15mL deionized water, 3mL dehydrated alcohol are placed in a beaker, and are stirred 10min, are obtained ethanol water.
2.698g anhydrous nitric acid lanthanum, 2.971g mass fraction are referred to as that 50% manganese nitrate solution is dissolved in ethanol water
In, dissolution is stirred at room temperature, obtains metal salt solution, concentration of metal ions 0.92mol/L.Weigh a water lemon of 3.486g
For lemon acid in metal salt solution, the molar ratio of metal ion and citric acid in the metal salt solution is 1:1, continues stirring extremely
Metal salt solution clarification, obtains mixed solution.Then it weighs 1.320gPVP (K90) to pour into the beaker for filling mixed solution, mix
The mass ratio for closing solution and the PVP is 20:1, stirs 6 hours persistently to get clear precursor solution.
Precursor solution is added in syringe, input voltage 30Kv, sample rate is 20 μ L/min, needle sizes
For 21G.Spinning sample is collected using roller, spray head and roller distance are 30cm, and spinning temperature is 50 DEG C, and relative humidity is
50%.
After sample collection obtained by electrostatic spinning, it is placed in baking oven, in 80 DEG C of freeze-day with constant temperature 12h.It then takes out, is placed in
Heating calcining is carried out in Muffle furnace.Temperature program are as follows: with the rate of heat addition of 10 DEG C/min, be heated to 800 DEG C from room temperature, heat preservation
10h, the LaMnO being then cooled to room temperature with Muffle furnace3。
By LaMnO provided in this embodiment3It simulates while eliminating PM and NO in exhaust gas from diesel vehiclexTesting experiment in, PM is most
Good ignition temperature is 380 DEG C, and NO maximum conversion rate is 29%, and corresponding peak temperature is 400 DEG C.
The foregoing is only a preferred embodiment of the present invention, not does restriction in any form to the present invention.It is all
Any equivalent variation that those skilled in the art makes above-described embodiment using technical solution of the present invention is modified or is drilled
Become etc., all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of netted perovskite catalyst of doughnut, which is characterized in that the chemical formula general formula of the catalyst is La1- xSrxMnO3, 0≤x≤0.4, the catalyst is in netted, and the duct with hollow tubular, aperture is in 200 ~ 300 nm.
2. a kind of preparation method of the netted perovskite catalyst of doughnut as described in claim 1, which is characterized in that including with
Lower step:
(1) preparation of precursor solution
Prepare ethanol water；By La1-xSrxMnO3Stoichiometric ratio weighs lanthanum nitrate, strontium nitrate, manganese nitrate and is dissolved in ethanol water
In solution, dissolution is stirred at room temperature, obtains metal salt solution；Next weighs citric acid and is placed in metal salt solution, continues to stir
It is clarified to metal salt solution, obtains mixed solution；It finally weighs PVP to pour into the container for filling mixed solution, persistently stirs 1 ~ 24
Hour, obtain clear precursor solution；
(2) electrostatic spinning
Precursor solution is added in the syringe with syringe needle, syringe needle is clamped as sun using high-voltage positive electrode power supply
Pole, input voltage are 0 ~ 30Kv, and sample rate is 1 ~ 20 μ L/min, and the needle sizes of syringe are 18 ~ 21G；It is received using roller
Collect electrostatic spinning sample, spray head and the roller distance of electrostatic spinning apparatus are 10 ~ 30cm, and spinning temperature is 25 ~ 50 DEG C, relatively wet
Degree is 10% ~ 50%；
(3) it calcines
It after the electrostatic spinning sample collection of step (2), is placed in baking oven, in 50 ~ 80 DEG C of freeze-day with constant temperature；It takes out, is placed in horse
Heating calcining, temperature program are not carried out in furnace are as follows: be heated to 400 ~ 800 DEG C from room temperature, 400 ~ 800 DEG C at a temperature of keep the temperature,
It is cooled to room temperature, obtains the netted perovskite catalyst of doughnut.
3. the preparation method of the netted perovskite catalyst of doughnut according to claim 2, which is characterized in that
The volume ratio of water and dehydrated alcohol is (0.1 ~ 100) in step (1) ethanol water: 1.
4. the preparation method of the netted perovskite catalyst of doughnut according to claim 2, which is characterized in that
The molar concentration of metal ion is 0.1 ~ 5mol/L in step (1) metal salt solution.
5. the preparation method of the netted perovskite catalyst of doughnut according to claim 2, which is characterized in that step (1)
The molar ratio of metal ion and citric acid in middle metal salt solution is 1:(0.5 ~ 10).
6. the preparation method of the netted perovskite catalyst of doughnut according to claim 2, which is characterized in that step (1)
The mass ratio of middle mixed solution and PVP are (1 ~ 100): 1.
7. the preparation method of the netted perovskite catalyst of doughnut according to claim 2, which is characterized in that
In step (3), electrostatic spinning sample 1 ~ 12h of freeze-day with constant temperature in 50 ~ 80 DEG C of baking oven.
8. the preparation method of the netted perovskite catalyst of doughnut according to claim 2, which is characterized in that step (3)
The rate of middle heating is 2 ~ 10 DEG C/min.
9. the preparation method of the netted perovskite catalyst of doughnut according to claim 2, which is characterized in that step (3)
Middle electrostatic spinning sample in muffle furnace 400 ~ 800 DEG C at a temperature of keep the temperature 2 ~ 10h.
10. a kind of netted perovskite catalyst of doughnut as described in claim 1 answering in exhaust gas from diesel vehicle catalytic purification
With.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393163A (en) * | 2020-03-23 | 2020-07-10 | 景德镇陶瓷大学 | Perovskite anode material and preparation method and application thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235558A (en) * | 2008-03-12 | 2008-08-06 | 长春理工大学 | Method for preparing perovskite-type rare earth composite oxide porous hollow nano fiber |
-
2019
- 2019-04-17 CN CN201910307084.6A patent/CN110102289A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235558A (en) * | 2008-03-12 | 2008-08-06 | 长春理工大学 | Method for preparing perovskite-type rare earth composite oxide porous hollow nano fiber |
Non-Patent Citations (3)
| Title |
|---|
| 中国稀土学会: "《2016-2017稀土科学技术学科发展报告》", 31 March 2018, 中国科学技术出版社 * |
| 孙丽萍: "《类钙钛矿结构A2BO4型中低温固体氧化物燃料电池阴极材料》", 31 May 2014 * |
| 张欣: ""La-Mn钙钛矿催化剂同时催化去除NOx和碳烟的研究"", 《中国优秀硕士论文全文数据库》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111393163A (en) * | 2020-03-23 | 2020-07-10 | 景德镇陶瓷大学 | Perovskite anode material and preparation method and application thereof |
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Application publication date: 20190809 |