CN108855025B - Catalyst for improving air quality of tunnel through nano titanium dioxide photocatalysis and preparation method thereof - Google Patents
Catalyst for improving air quality of tunnel through nano titanium dioxide photocatalysis and preparation method thereof Download PDFInfo
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- CN108855025B CN108855025B CN201810736813.5A CN201810736813A CN108855025B CN 108855025 B CN108855025 B CN 108855025B CN 201810736813 A CN201810736813 A CN 201810736813A CN 108855025 B CN108855025 B CN 108855025B
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- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title claims abstract description 36
- 239000003054 catalyst Substances 0.000 title claims abstract description 29
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 20
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 19
- 238000004537 pulping Methods 0.000 claims abstract description 21
- 238000009210 therapy by ultrasound Methods 0.000 claims abstract description 19
- 239000011941 photocatalyst Substances 0.000 claims abstract description 18
- 230000003647 oxidation Effects 0.000 claims abstract description 15
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 15
- 238000000703 high-speed centrifugation Methods 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 31
- 239000002002 slurry Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 18
- 239000008367 deionised water Substances 0.000 claims description 17
- 229910021641 deionized water Inorganic materials 0.000 claims description 17
- 230000007062 hydrolysis Effects 0.000 claims description 16
- 238000006460 hydrolysis reaction Methods 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000006386 neutralization reaction Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 150000002500 ions Chemical class 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 238000013178 mathematical model Methods 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000005457 optimization Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000004381 surface treatment Methods 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- YTAHJIFKAKIKAV-XNMGPUDCSA-N [(1R)-3-morpholin-4-yl-1-phenylpropyl] N-[(3S)-2-oxo-5-phenyl-1,3-dihydro-1,4-benzodiazepin-3-yl]carbamate Chemical compound O=C1[C@H](N=C(C2=C(N1)C=CC=C2)C1=CC=CC=C1)NC(O[C@H](CCN1CCOCC1)C1=CC=CC=C1)=O YTAHJIFKAKIKAV-XNMGPUDCSA-N 0.000 claims description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- AGXUVMPSUKZYDT-UHFFFAOYSA-L barium(2+);octadecanoate Chemical compound [Ba+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O AGXUVMPSUKZYDT-UHFFFAOYSA-L 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000006185 dispersion Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 claims description 3
- 229960003656 ricinoleic acid Drugs 0.000 claims description 3
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 3
- 235000011152 sodium sulphate Nutrition 0.000 claims description 3
- 235000019832 sodium triphosphate Nutrition 0.000 claims description 3
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 claims description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 239000002105 nanoparticle Substances 0.000 abstract description 3
- 239000004408 titanium dioxide Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004887 air purification Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
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- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
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- 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
- B01J35/39—Photocatalytic properties
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- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
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Abstract
The invention belongs to the technical field of chemical catalyst preparation, and discloses a catalyst for improving the air quality of a tunnel through photocatalysis of nano titanium dioxide and a preparation method thereof, wherein the catalyst for improving the air quality of the tunnel through photocatalysis of nano titanium dioxide and the preparation system thereof comprise: the device comprises a power supply module, a starting module, a parameter configuration module, a single-chip microcomputer control module, a pulping module, a high-speed centrifugation module, a low-temperature oxidation module, a high-temperature module, an ultraviolet treatment module and an ultrasonic treatment module. According to the invention, regular electron hole pairs are formed through ultraviolet light transmission treatment, so that uniform nano particles can be formed, indoor air can be catalytically degraded and purified under the condition of visible light, and the indoor air quality can be effectively controlled; the modified nano titanium dioxide has good dispersibility, good stability and good compatibility with organic matters, can improve the weather resistance of the titanium dioxide, and has wide application in the field of photocatalysts.
Description
Technical Field
The invention belongs to the technical field of chemical catalyst preparation, and particularly relates to a catalyst for improving tunnel air quality through nano titanium dioxide photocatalysis and a preparation method thereof.
Background
The nano titanium dioxide is white loose powder, has strong ultraviolet shielding effect and good dispersibility and weather resistance. Can be used in the fields of cosmetics, functional fiber, plastics, coating, paint, etc., and can be used as ultraviolet screening agent for preventing ultraviolet ray invasion. Can also be used for top-grade automobile finish paint, and has the effect of color variation along with the angle. However, the existing nano titanium dioxide photocatalyst has poor air purification effect; poor dispersibility, instability and poor compatibility with organic substances.
In summary, the problems of the prior art are as follows:
(1) the existing nano titanium dioxide photocatalyst has poor air purification effect; poor dispersibility, instability and poor compatibility with organic substances.
(2) The existing parameter configuration method has poor inhibition capability on different disturbances, and directly influences the quality of the air quality catalyst.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a catalyst for improving the air quality of a tunnel through nano titanium dioxide photocatalysis and a preparation method thereof.
The invention is realized in such a way that a preparation method of a catalyst for improving the air quality of a tunnel through photocatalysis of nano titanium dioxide comprises the following steps:
step one, during preparation, a power supply module supplies power to a single chip microcomputer; starting the preparation equipment through a starting module; performing initial parameter configuration on the preparation equipment through a parameter configuration module by adopting a parameter optimization configuration method;
the parameter optimization configuration method comprises the following steps:
(1) according to the total disturbance f (x)1，x2) Setting the expected disturbance observation bandwidth to be ω c.
(2) Given the tracking error e at work1Maximum value e ofmaxAnd according to the structural characteristics of the fal functionDetermining the minimum value F of FminAnd maximum value FminFurther, the variation range of F (F) is obtainedmin，Fmax)；
(3) Selecting F satisfying the following two conditions0And p, pole allocation:
1) make F0Bandwidth peak d occurs at a point0＝ρ；
2) Make Fmin、FmaxThe two points correspond to the same bandwidth and equal to the expected disturbance observation bandwidth. Namely, it is
Wherein:
in the determination of rho and F0Then, the parameter configuration is calculated by:
β01＝3ρ，β02＝3ρ2/F0，β03＝ρ3/F0；
secondly, the pulping module is dispatched by the workshop dispatching mathematical model singlechip control module to prepare pulp through low-temperature hydrolysis and low-temperature neutralization; then, performing solid-liquid separation on the prepared slurry through a high-speed centrifugal module by using a high-speed centrifugal machine, repeatedly washing the slurry with deionized water, and performing centrifugal separation until the ion number in water is less than 95%;
the workshop scheduling mathematical model is as follows:
(1) set of machines M ═ M1，m2，…，mm}，mjJ is 1, 2, …, m;
(2) part set P ═ P1，p2，…，pn}，Denotes the ith part, i ═ 1, 2, …, n;
(3) process sequence set OP ═ OP1，op2，…，opn}，OPi＝{opi1，opi2，…，opikDenotes the part piA process sequence of |;
(4) corresponding set of available machines OPM＝{opi1，opi2，…，opik}，OPij＝{opij1，opij2，…，opijkDenotes the part piThe working machine selected in step j;
(5) time matrix T, T corresponding to each part processing on each machineijE T, denotes the ith part piI time to use jth machine;
(6) cost matrix C, C for processing each part on each machineijE C, denotes the ith part piThe processing cost of using the jth machine;
adding deionized water into the centrifuged slurry through a low-temperature oxidation module, and continuously stirring to form a white suspension; then 100-105ml of hydrogen peroxide is added and continuously stirred, and the temperature is controlled at 21-25 ℃; obtaining orange transparent liquid;
step four, placing the orange transparent liquid into a high-temperature reaction kettle through a high-temperature module, circularly heating to 190 ℃ at 180-;
fifthly, exciting the cooled complex nano titanium dioxide for 0.9 to 1.2 hours by using an ultraviolet lamp with high intensity wavelength of 254nm through an ultraviolet treatment module to obtain a colorless and transparent nano titanium dioxide photocatalyst;
and step six, carrying out ultrasonic treatment on the nano titanium dioxide photocatalyst by using an ultrasonic generator through an ultrasonic treatment module.
Further, the pulping module comprises the following pulping methods:
adding deionized water into a reaction kettle for stirring, controlling the temperature below 10 ℃, and controlling the stirring revolution at 700-1000 rpm/min; slowly adding 45-55ml of titanium tetrachloride into the beaker for hydrolysis, and controlling the hydrolysis temperature to be below 20 ℃; preparing a transparent strong acid solution after the hydrolysis is finished; and adding ammonia water into the transparent strong acid solution for neutralization and continuously stirring to form viscous slurry until the pH value is neutral.
Further, the ultrasonic processing module comprises the following processing methods:
firstly, conveying the nano titanium dioxide to a surface treatment tank, then adding barium stearate and ethanol, controlling the temperature at 50-60 ℃, and stirring at the rotation speed of 150-;
secondly, adding the nano titanium dioxide dispersion liquid into an ultrasonic generator, adding a ricinoleic acid ester sodium sulfate and sodium tripolyphosphate composite modifier, and performing ultrasonic treatment at 50-60 ℃ and 60-80KHz for 20-40min to obtain a modified nano titanium dioxide liquid;
and finally, filtering, drying, crushing and sieving the modified nano titanium dioxide solution to complete the surface treatment of the nano titanium dioxide.
Another object of the present invention is to provide a system for preparing a nano titanium dioxide catalyst for improving air quality of a tunnel by photocatalysis, which comprises:
the device comprises a power supply module, a starting module, a parameter configuration module, a singlechip control module, a pulping module, a high-speed centrifugation module, a low-temperature oxidation module, a high-temperature module, an ultraviolet treatment module and an ultrasonic treatment module;
the power supply module is connected with the singlechip control module and used for supplying power to the singlechip;
the starting module is connected with the single chip microcomputer control module and used for starting the preparation equipment through a starting key;
the parameter configuration module is connected with the single chip microcomputer control module and used for carrying out initial parameter configuration on the preparation equipment;
the single-chip microcomputer control module is connected with the power supply module, the starting module, the parameter configuration module, the pulping module, the high-speed centrifugation module, the low-temperature oxidation module, the high-temperature module, the ultraviolet treatment module and the ultrasonic treatment module and is used for controlling and scheduling each module to normally work;
the pulping module is connected with the single chip microcomputer control module and is used for preparing slurry through low-temperature hydrolysis and low-temperature neutralization;
the high-speed centrifugal module is connected with the single chip microcomputer control module and used for carrying out solid-liquid separation on the prepared slurry through a high-speed centrifugal machine, and repeatedly washing the slurry with deionized water, and carrying out centrifugal separation until the ion number in water is less than 95%;
the low-temperature oxidation module is connected with the single-chip microcomputer control module and is used for adding deionized water into the centrifuged slurry and continuously stirring to form a white suspension; then 100-105ml of hydrogen peroxide is added and continuously stirred, and the temperature is controlled at 21-25 ℃; obtaining orange transparent liquid;
the high-temperature module is connected with the single-chip microcomputer control module and used for placing the orange transparent liquid into a high-temperature reaction kettle, circularly heating the orange transparent liquid to 190 ℃, controlling the pressure within 0.3Mpa, controlling the stirring rotating speed to 480-;
and the ultraviolet treatment module is connected with the single-chip microcomputer control module and is used for exciting the cooled complex nano titanium dioxide for 0.9-1.2 hours by utilizing a high-intensity 254nm ultraviolet lamp for transmission, so that the colorless and transparent nano titanium dioxide photocatalyst can be prepared.
And the ultrasonic processing module is connected with the single-chip microcomputer control module and is used for carrying out ultrasonic processing on the nano titanium dioxide photocatalyst through an ultrasonic generator.
The invention also aims to provide a catalyst for improving the air quality of the tunnel, which is prepared by the preparation method of the catalyst for improving the air quality of the tunnel through the photocatalysis of the nano titanium dioxide.
According to the invention, regular electron hole pairs are formed through ultraviolet light transmission treatment, so that uniform nano particles can be formed, indoor air can be catalytically degraded and purified under the condition of visible light, and the indoor air quality can be effectively controlled; meanwhile, dispersed and agglomerated nano particles are broken through an ultrasonic method, and ultrasonic waves can generate cavitation, so that liquid is in a high-frequency oscillation state, and the agglomeration phenomenon among the particles is reduced; the modified nano titanium dioxide has good dispersibility, good stability and good compatibility with organic matters, can improve the weather resistance of the titanium dioxide, and has wide application in the field of photocatalysts. The invention ensures that the disturbance observation performance is influenced the least and the disturbance observation bandwidth is always larger than a given value when the disturbance observation performance changes within an allowable range; the parameter configuration method can effectively expand the bandwidth of the observer, further improve the suppression capability on different disturbances, and has important significance for expanding the application range. Under the normal production condition, a dispatcher can intuitively carry out production planning and scheduling through the air quality catalyst, so that a workshop can carry out production quickly and orderly on the premise of ensuring the delivery time, the processing period of the air quality catalyst is shortened, and the utilization rate and the production efficiency of a machine are improved. And (4) conclusion: the genetic algorithm static production scheduling model can be effectively used for general scheduling of air quality catalyst operation, can participate in manual coordination adjustment when meeting a sudden state, or needs to provide a dynamic scheduling solution.
Drawings
FIG. 1 is a flow chart of a catalyst for improving air quality of a tunnel by nano-titanium dioxide photocatalysis and a preparation method thereof, which are provided by the implementation of the invention;
FIG. 2 is a block diagram of a system for photocatalytic improvement of air quality of tunnel catalyst and preparation of nano-titania according to the present invention;
in fig. 2: 1. a power supply module; 2. a starting module; 3. a parameter configuration module; 4. a single chip microcomputer control module; 5. a pulping module; 6. a high-speed centrifuge module; 7. a low temperature oxidation module; 8. a high temperature module; 9. an ultraviolet treatment module; 10. and an ultrasonic processing module.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the preparation method of the catalyst for improving tunnel air quality through nano titanium dioxide photocatalysis provided by the invention comprises the following steps:
s101: during preparation, the power supply module supplies power to the single chip microcomputer; starting the preparation equipment through a starting module; carrying out initial parameter configuration on the preparation equipment through a parameter configuration module;
s102: the single chip microcomputer control module dispatches the pulping module to prepare pulp through low-temperature hydrolysis and low-temperature neutralization; then, performing solid-liquid separation on the prepared slurry through a high-speed centrifugal module by using a high-speed centrifugal machine, repeatedly washing the slurry with deionized water, and performing centrifugal separation until the ion number in water is less than 95%;
s103: adding deionized water into the centrifuged slurry through a low-temperature oxidation module, and continuously stirring to form a white suspension; then 100-105ml of hydrogen peroxide is added and continuously stirred, and the temperature is controlled at 21-25 ℃; obtaining orange transparent liquid;
s104: placing the orange transparent liquid into a high-temperature reaction kettle through a high-temperature module, circularly heating to 190 ℃ at 180-;
s105: the cooled complex nano titanium dioxide is excited for 0.9 to 1.2 hours by the ultraviolet treatment module through the transmission of a high-intensity 254nm ultraviolet lamp, and then the colorless and transparent nano titanium dioxide photocatalyst can be prepared;
s106: and carrying out ultrasonic treatment on the nano titanium dioxide photocatalyst by using an ultrasonic generator through an ultrasonic treatment module.
As shown in fig. 2, a system for preparing a catalyst for improving air quality of a tunnel through photocatalysis of nano titanium dioxide provided by an embodiment of the present invention includes: the device comprises a power module 1, a starting module 2, a parameter configuration module 3, a single-chip microcomputer control module 4, a pulping module 5, a high-speed centrifugation module 6, a low-temperature oxidation module 7, a high-temperature module 8, an ultraviolet treatment module 9 and an ultrasonic treatment module 10.
The power module 1 is connected with the singlechip control module 4 and used for supplying power to the singlechip;
the starting module 2 is connected with the single chip microcomputer control module 4 and used for starting the preparation equipment through a starting key;
the parameter configuration module 3 is connected with the single chip microcomputer control module 4 and is used for carrying out initial parameter configuration on the preparation equipment;
the single-chip microcomputer control module 4 is connected with the power supply module 1, the starting module 2, the parameter configuration module 3, the pulping module 5, the high-speed centrifugal module 6, the low-temperature oxidation module 7, the high-temperature module 8, the ultraviolet treatment module 9 and the ultrasonic treatment module 10 and is used for controlling and scheduling each module to normally work;
the pulping module 5 is connected with the single chip microcomputer control module 4 and is used for preparing slurry through low-temperature hydrolysis and low-temperature neutralization;
the high-speed centrifugal module 6 is connected with the single chip microcomputer control module 4 and is used for carrying out solid-liquid separation on the prepared slurry through a high-speed centrifugal machine, and washing the slurry repeatedly by using deionized water, wherein the centrifugal separation is carried out until the ion number in the water is less than 95%;
the low-temperature oxidation module 7 is connected with the single-chip microcomputer control module 4 and is used for adding deionized water into the centrifuged slurry and continuously stirring to form a white suspension; then 100-105ml of hydrogen peroxide is added and continuously stirred, and the temperature is controlled at 21-25 ℃; obtaining orange transparent liquid;
the high-temperature module 8 is connected with the single-chip microcomputer control module 4 and is used for placing the orange transparent liquid into a high-temperature reaction kettle, circularly heating the orange transparent liquid to 190 ℃ at the temperature of 180-;
and the ultraviolet treatment module 9 is connected with the singlechip control module 4 and is used for exciting the cooled complex nano titanium dioxide for 0.9 to 1.2 hours by transmitting through a high-intensity 254nm ultraviolet lamp to obtain the colorless and transparent nano titanium dioxide photocatalyst.
And the ultrasonic processing module 10 is connected with the single-chip microcomputer control module 4 and is used for carrying out ultrasonic processing on the nano titanium dioxide photocatalyst through an ultrasonic generator.
The pulping module 5 provided by the invention has the following pulping method:
adding deionized water into a reaction kettle for stirring, controlling the temperature below 10 ℃, and controlling the stirring revolution at 700-1000 rpm/min; slowly adding 45-55ml of titanium tetrachloride into the beaker for hydrolysis, and controlling the hydrolysis temperature to be below 20 ℃; preparing a transparent strong acid solution after the hydrolysis is finished; and adding ammonia water into the transparent strong acid solution for neutralization and continuously stirring to form viscous slurry until the pH value is neutral.
The ultrasonic processing module 10 provided by the invention has the following processing method:
firstly, conveying the nano titanium dioxide to a surface treatment tank, then adding barium stearate and ethanol, controlling the temperature at 50-60 ℃, and stirring at the rotation speed of 150-;
secondly, adding the nano titanium dioxide dispersion liquid into an ultrasonic generator, adding a ricinoleic acid ester sodium sulfate and sodium tripolyphosphate composite modifier, and performing ultrasonic treatment at 50-60 ℃ and 60-80KHz for 20-40min to obtain a modified nano titanium dioxide liquid;
and finally, filtering, drying, crushing and sieving the modified nano titanium dioxide solution to complete the surface treatment of the nano titanium dioxide.
The application of the principles of the present invention will now be described in further detail with reference to specific embodiments.
The preparation method of the catalyst for improving the air quality of the tunnel through the photocatalysis of the nano titanium dioxide, which is provided by the embodiment of the invention, comprises the following steps:
step one, during preparation, a power supply module supplies power to a single chip microcomputer; starting the preparation equipment through a starting module; performing initial parameter configuration on the preparation equipment through a parameter configuration module by adopting a parameter optimization configuration method;
the parameter optimization configuration method comprises the following steps:
(1) according to the total disturbance f (x)1，x2) Dynamic characteristics of (1), settingThe desired disturbance observation bandwidth is ω c.
(2) Given the tracking error e at work1Maximum value e ofmaxAnd determining the minimum value F of F according to the structural characteristics of the fal functionminAnd maximum value FmaxFurther, the variation range of F (F) is obtainedmin，Fmax)；
(3) Selecting F satisfying the following two conditions0And p, pole allocation:
1) make F0Bandwidth peak d occurs at a point0＝ρ；
2) Make Fmin、FmaxThe two points correspond to the same bandwidth and equal to the expected disturbance observation bandwidth. Namely, it is
Wherein:
in the determination of rho and F0Then, the parameter configuration is calculated by:
β01＝3ρ，β02＝3ρ2/F0，β03＝ρ3/F0；
secondly, the pulping module is dispatched by the workshop dispatching mathematical model singlechip control module to prepare pulp through low-temperature hydrolysis and low-temperature neutralization; then, performing solid-liquid separation on the prepared slurry through a high-speed centrifugal module by using a high-speed centrifugal machine, repeatedly washing the slurry with deionized water, and performing centrifugal separation until the ion number in water is less than 95%;
the workshop scheduling mathematical model is as follows:
(1) set of machines M ═ M1，m2，…，mm}，mjJ is 1, 2, …, m;
(2) part set p ═ p1，p2，…，pnDenotes the ith part, i ═ 1, 2, …, n;
(3) process sequence set OP ═ OP1，op2，…，opn}，OPi＝{opi1，opi2，…，opikDenotes the part piA process sequence of |;
(4) corresponding set of available machines OPM＝{opi1，opi2，…，opik}，OPij＝{opij1，opij2，…，opijkDenotes the part ρiThe working machine selected in step j;
(5) time matrix T, T corresponding to each part processing on each machineijE T, denotes the ith part ρiI time to use jth machine;
(6) cost matrix C, C for processing each part on each machineijE C, denotes the ith part piThe processing cost of using the jth machine;
adding deionized water into the centrifuged slurry through a low-temperature oxidation module, and continuously stirring to form a white suspension; then 100-105ml of hydrogen peroxide is added and continuously stirred, and the temperature is controlled at 21-25 ℃; obtaining orange transparent liquid;
step four, placing the orange transparent liquid into a high-temperature reaction kettle through a high-temperature module, circularly heating to 190 ℃ at 180-;
fifthly, exciting the cooled complex nano titanium dioxide for 0.9 to 1.2 hours by using an ultraviolet lamp with high intensity wavelength of 254nm through an ultraviolet treatment module to obtain a colorless and transparent nano titanium dioxide photocatalyst;
and step six, carrying out ultrasonic treatment on the nano titanium dioxide photocatalyst by using an ultrasonic generator through an ultrasonic treatment module.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (5)
1. A preparation method of a catalyst for improving the air quality of a tunnel through photocatalysis of nano titanium dioxide is characterized by comprising the following steps:
step one, during preparation, a power supply module supplies power to a single chip microcomputer; starting the preparation equipment through a starting module; performing initial parameter configuration on the preparation equipment through a parameter configuration module by adopting a parameter optimization configuration method;
the parameter optimization configuration method comprises the following steps:
(1) according to the total disturbance f (x)1，x2) Setting the expected disturbance observation bandwidth as ω c;
(2) given the tracking error e at work1Maximum value e ofmaxAnd determining the minimum value F of F according to the structural characteristics of the fal functionminAnd maximum value FmaxFurther, the variation range of F (F) is obtainedmin，Fmax)；
(3) Selecting F satisfying the following two conditions0And p, pole allocation:
1) make F0Bandwidth peak d occurs at a point0＝ρ；
2) Make Fmin、FmaxThe bandwidth of the two points is equal to the expected disturbance observation bandwidth, i.e. the bandwidth of the two points is equal to
Wherein:
in the determination of rho and F0Then, the parameter configuration is calculated by:
β01＝3ρ，β02＝3ρ2/F0，β03＝ρ3/F0；
secondly, the pulping module is dispatched by the workshop dispatching mathematical model singlechip control module to prepare pulp through low-temperature hydrolysis and low-temperature neutralization; then, performing solid-liquid separation on the prepared slurry through a high-speed centrifugal module by using a high-speed centrifugal machine, repeatedly washing the slurry with deionized water, and performing centrifugal separation until the ion number in water is less than 95%;
the workshop scheduling mathematical model is as follows:
(1) set of machines M ═ M1，m2，…，mm}，mjJ is 1, 2, …, m;
(2) part set P ═ P1，p2，…，pn}，piDenotes the ith part, i ═ 1, 2, …, n;
(3) process sequence set OP ═ OP1，op2，…，opn}，OPi＝{opi1，opi2，…，opikDenotes the part piThe process sequence of (1);
(4) corresponding set of available machines OPM＝{opi1，opi2，…，opik}，OPij＝{opij1，opij2，…，opijkDenotes the part piThe processing machine selected in step j;
(5) time matrix T, T corresponding to each part processing on each machineijE T, denotes the ith part piTime of use of jth machine;
(6) cost matrix C, C for processing each part on each machineijE C, denotes the ith part piThe processing cost of using the jth machine;
adding deionized water into the centrifuged slurry through a low-temperature oxidation module, and continuously stirring to form a white suspension; then 100-105ml of hydrogen peroxide is added and continuously stirred, and the temperature is controlled at 21-25 ℃; obtaining orange transparent liquid;
step four, placing the orange transparent liquid into a high-temperature reaction kettle through a high-temperature module, circularly heating to 190 ℃ at 180-;
fifthly, exciting the cooled complex nano titanium dioxide for 0.9 to 1.2 hours by using an ultraviolet lamp with high intensity wavelength of 254nm through an ultraviolet treatment module to obtain a colorless and transparent nano titanium dioxide photocatalyst;
and step six, carrying out ultrasonic treatment on the nano titanium dioxide photocatalyst by using an ultrasonic generator through an ultrasonic treatment module.
2. The preparation method of the catalyst for improving the air quality of the tunnel through the photocatalysis of the nano titanium dioxide as claimed in claim 1, wherein the pulping module comprises the following pulping steps:
adding deionized water into a reaction kettle for stirring, controlling the temperature below 10 ℃, and controlling the stirring revolution at 700-1000 rpm/min; slowly adding 45-55ml of titanium tetrachloride into the beaker for hydrolysis, and controlling the hydrolysis temperature to be below 20 ℃; preparing a transparent strong acid solution after the hydrolysis is finished; and adding ammonia water into the transparent strong acid solution for neutralization and continuously stirring to form viscous slurry until the pH value is neutral.
3. The preparation method of the nano titanium dioxide photocatalysis tunnel air quality improving catalyst according to claim 1, wherein the ultrasonic treatment module treatment method comprises the following steps:
firstly, conveying the nano titanium dioxide to a surface treatment tank, then adding barium stearate and ethanol, controlling the temperature at 50-60 ℃, and stirring at the rotation speed of 150-;
secondly, adding the nano titanium dioxide dispersion liquid into an ultrasonic generator, adding a ricinoleic acid ester sodium sulfate and sodium tripolyphosphate composite modifier, and performing ultrasonic treatment at 50-60 ℃ and 60-80KHz for 20-40min to obtain a modified nano titanium dioxide liquid;
and finally, filtering, drying, crushing and sieving the modified nano titanium dioxide solution to complete the surface treatment of the nano titanium dioxide.
4. A system for preparing the nano titanium dioxide catalyst for improving the air quality of the tunnel by photocatalysis according to claim 1, wherein the system for preparing the nano titanium dioxide catalyst for improving the air quality of the tunnel by photocatalysis comprises:
the device comprises a power supply module, a starting module, a parameter configuration module, a singlechip control module, a pulping module, a high-speed centrifugation module, a low-temperature oxidation module, a high-temperature module, an ultraviolet treatment module and an ultrasonic treatment module;
the power supply module is connected with the singlechip control module and used for supplying power to the singlechip;
the starting module is connected with the single chip microcomputer control module and used for starting the preparation equipment through a starting key;
the parameter configuration module is connected with the single chip microcomputer control module and used for carrying out initial parameter configuration on the preparation equipment;
the single-chip microcomputer control module is connected with the power supply module, the starting module, the parameter configuration module, the pulping module, the high-speed centrifugation module, the low-temperature oxidation module, the high-temperature module, the ultraviolet treatment module and the ultrasonic treatment module and is used for controlling and scheduling each module to normally work;
the pulping module is connected with the single chip microcomputer control module and is used for preparing slurry through low-temperature hydrolysis and low-temperature neutralization;
the high-speed centrifugal module is connected with the single chip microcomputer control module and used for carrying out solid-liquid separation on the prepared slurry through a high-speed centrifugal machine, and repeatedly washing the slurry with deionized water, and carrying out centrifugal separation until the ion number in water is less than 95%;
the low-temperature oxidation module is connected with the single-chip microcomputer control module and is used for adding deionized water into the centrifuged slurry and continuously stirring to form a white suspension; then 100-105ml of hydrogen peroxide is added and continuously stirred, and the temperature is controlled at 21-25 ℃; obtaining orange transparent liquid;
the high-temperature module is connected with the single-chip microcomputer control module and used for placing the orange transparent liquid into a high-temperature reaction kettle, circularly heating the orange transparent liquid to 190 ℃, controlling the pressure within 0.3Mpa, controlling the stirring rotating speed to 480-;
the ultraviolet treatment module is connected with the single-chip microcomputer control module and is used for exciting the cooled complex nano titanium dioxide for 0.9 to 1.2 hours by utilizing a high-intensity 254nm ultraviolet lamp to transmit so as to prepare a colorless and transparent nano titanium dioxide photocatalyst;
and the ultrasonic processing module is connected with the single-chip microcomputer control module and is used for carrying out ultrasonic processing on the nano titanium dioxide photocatalyst through an ultrasonic generator.
5. The catalyst for improving the air quality of the tunnel, which is prepared by the preparation method of the catalyst for improving the air quality of the tunnel by the photocatalysis of the nano titanium dioxide according to claim 1, is characterized in that the catalyst for improving the air quality of the tunnel is prepared from the nano titanium dioxide.
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