CN110694605A - Preparation process of photocatalyst - Google Patents
Preparation process of photocatalyst Download PDFInfo
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- CN110694605A CN110694605A CN201911089835.8A CN201911089835A CN110694605A CN 110694605 A CN110694605 A CN 110694605A CN 201911089835 A CN201911089835 A CN 201911089835A CN 110694605 A CN110694605 A CN 110694605A
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- ceramic plate
- photocatalyst
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- porous ceramic
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- 239000011941 photocatalyst Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 230000000903 blocking effect Effects 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 4
- 239000000919 ceramic Substances 0.000 claims description 49
- 230000002195 synergetic effect Effects 0.000 claims description 32
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 30
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 29
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 28
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 19
- 239000000084 colloidal system Substances 0.000 claims description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 15
- 229910021529 ammonia Inorganic materials 0.000 claims description 15
- 239000000839 emulsion Substances 0.000 claims description 15
- 239000000376 reactant Substances 0.000 claims description 15
- 239000010936 titanium Substances 0.000 claims description 15
- 229910052719 titanium Inorganic materials 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 14
- 239000004408 titanium dioxide Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 239000011521 glass Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 11
- 210000002469 basement membrane Anatomy 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 8
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 6
- 239000005457 ice water Substances 0.000 claims description 6
- 150000007522 mineralic acids Chemical class 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 12
- 230000001699 photocatalysis Effects 0.000 abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 description 9
- 241000894006 Bacteria Species 0.000 description 6
- 239000003643 water by type Substances 0.000 description 5
- 241000264877 Hippospongia communis Species 0.000 description 4
- 241000243142 Porifera Species 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- 231100000331 toxic Toxicity 0.000 description 3
- 230000002588 toxic effect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 229910052809 inorganic oxide Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- CVOFKRWYWCSDMA-UHFFFAOYSA-N 2-chloro-n-(2,6-diethylphenyl)-n-(methoxymethyl)acetamide;2,6-dinitro-n,n-dipropyl-4-(trifluoromethyl)aniline Chemical compound CCC1=CC=CC(CC)=C1N(COC)C(=O)CCl.CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O CVOFKRWYWCSDMA-UHFFFAOYSA-N 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 239000000416 hydrocolloid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000003053 toxin Substances 0.000 description 1
- 231100000765 toxin Toxicity 0.000 description 1
- 108700012359 toxins Proteins 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Images
Classifications
-
- B01J35/39—
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- 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
- 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
-
- B01J35/56—
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
Abstract
The invention belongs to the technical field of photocatalytic purification, and particularly relates to a preparation process of a photocatalyst, wherein a catalyst film comprises a bottom film and a wrapping sheet; the bottom film is in a round table shape, the thickness of the bottom film is not more than one centimeter, and the side wall of the bottom film is uniformly and fixedly connected with a wrapping sheet; the top view of the wrapping sheet is triangular, and the wrapping sheet can be folded inwards to form a sealing body with the bottom film; the sealing body is arranged to be conical; the upper surface of the wrapping sheet is fixedly connected with a blocking sheet; the invention is mainly used for solving the problems that when the photocatalyst in the prior art is prepared into a film, the carrier is usually activated carbon felt, activated carbon sponge, paper honeycomb, aluminum honeycomb, foamed aluminum, wire mesh and the like, but the carrier has insufficient adhesion to the photocatalyst, insufficient adhesion amount, easy shedding and short service life. Therefore, the use effect of the photocatalyst film is not ideal enough, and the photocatalyst is difficult to use when water resources are purified.
Description
Technical Field
The invention belongs to the technical field of photocatalytic purification, and particularly relates to a preparation process of a photocatalyst.
Background
The photocatalyst is a general name of a photo-semiconductor material with a photocatalytic function represented by nano-scale titanium dioxide, which is coated on the surface of a substrate and generates a strong catalytic degradation function under the action of ultraviolet light and visible light: can effectively degrade toxic and harmful gases in the air; and can effectively kill various bacteria in the water and decompose and harmlessly treat toxins released by the bacteria or fungi; meanwhile, the composite material also has the functions of removing formaldehyde, deodorizing, resisting pollution, purifying air and the like;
wherein the titanium dioxide photocatalysis technology is an advanced oxidative decomposition technology, the surface of titanium dioxide particles generates charge separation after absorbing ultraviolet light to generate active free radicals with extremely strong oxidation capability, the photocatalytic activity of the titanium dioxide is caused by the active free radicals, and the titanium dioxide photocatalysis technology can non-selectively oxidize and decompose various organic pollutants, the oxidation capability of the photocatalyst is far higher than that of ozone and hydrogen peroxide, at present, commonly used photocatalyst carriers comprise activated carbon felts, activated carbon sponges, paper honeycombs, aluminum honeycombs, foamed aluminum, metal wire meshes and the like, however, the adhesion of the carriers to the photocatalyst is not strong enough, the adhesion amount is not enough, the carriers are easy to fall off, the service life is short, the use effect of the photocatalyst film is not ideal, meanwhile, when water resources are purified, the photocatalyst is difficult to use, the steps are complicated, control needs to be considered, and labor consumption in use is greatly increased.
Disclosure of Invention
In order to make up the defects of the prior art, the invention provides a preparation process of a photocatalyst. The invention is mainly used for solving the problems that when the photocatalyst in the prior art is prepared into a film, the carrier is usually activated carbon felt, activated carbon sponge, paper honeycomb, aluminum honeycomb, foamed aluminum, wire mesh and the like, but the carrier has insufficient adhesion to the photocatalyst, insufficient adhesion amount, easy shedding and short service life. Therefore, the use effect of the photocatalyst film is not ideal enough, and the photocatalyst is difficult to use when water resources are purified.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a preparation process of a photocatalyst, which comprises the following steps:
s1: putting metal titanium into a glass beaker, adding aqueous hydrogen peroxide to form a mixed solution, wherein the molar ratio of the metal titanium to the hydrogen peroxide is 1: 7; the metal titanium is granular sponge titanium; then placing the glass beaker in an ice-water bath, controlling the temperature of the ice-water bath at 20 ℃, and stirring the mixed solution at a medium speed to form an intermediate reactant;
s2: pouring a certain amount of ammonia water into a flask with a branch pipe and a piston, placing the flask in a hot water bath, controlling the temperature of the water bath to be about 60 ℃, heating to volatilize ammonia to form ammonia vapor, enabling the ammonia vapor to enter an intermediate reactant through the branch pipe, adjusting the pH value of the intermediate reactant to 9 to obtain an adjusted intermediate reactant, wherein the molar ratio of metal titanium to ammonia is 1: 10; then, the intermediate reactant after the adjustment is continuously stirred for 5 hours until a transparent yellow complex aqueous solution is obtained;
s3: transferring the yellow complex aqueous solution obtained in S2 to a flask with a branch pipe, putting the flask into a hot water bath at 60 ℃, and evaporating to remove excessive hydrogen peroxide and ammonia to obtain yellow complex colloid; pouring the yellow complex colloid into a high-pressure reaction kettle, carrying out hydrothermal reaction at 210 ℃ for 5 hours to obtain pure white water-based emulsion, pouring the pure white water-based emulsion into a glass beaker, adding inorganic acid while stirring at normal temperature, and adjusting the pH value of the emulsion to 5 to obtain acidified water-based emulsion;
s4: putting the glass beaker in the S3 into a water bath device at 85 ℃, and continuously stirring for 5 hours to ensure that the acidified water-based emulsion is gradually gelatinized into nano titanium dioxide water-based colloid; spraying nano titanium dioxide aqueous colloid on the wavy surface and the inner wall of a conical hole of the synergistic porous ceramic plate by combining a spray gun, and then drying at the temperature of 180 ℃, wherein the spraying and the drying are alternately repeated for 2 cycles, and after each cycle, the ceramic plate is required to rotate by 150 degrees and then the next cycle is carried out; when in spraying, the inclination angle between a spray head of the spray gun and the synergistic porous ceramic plate is 35 degrees, the synergistic porous ceramic plate is a ceramic substrate the surface of which is provided with a plurality of parallel wave crest surfaces and wave trough surfaces, the wave crest surfaces and the wave trough surfaces are alternately arranged, and the ceramic substrate is provided with a plurality of conical holes;
s5: and (3) sintering the synergistic porous ceramic plate which is sprayed in the S4 in a high-temperature blast oven at the sintering temperature of 600 ℃ for 1.5 hours, and naturally cooling to room temperature to form a nano titanium dioxide photocatalyst film on the surface of the synergistic porous ceramic plate and on the inner wall of the conical hole.
The hydrogen peroxide content in the aqueous hydrogen peroxide solution is 30 percent, and the specific gravity is 1.1 g/ml; the medium-speed stirring speed is 500 revolutions per minute; the content of the ammonia water is 26 percent, and the specific gravity is 0.9 g/ml; the inorganic acid is any one of dilute hydrochloric acid, dilute sulfuric acid or dilute nitric acid; the content of titanium dioxide in the nano titanium dioxide aqueous colloid is 5 wt%.
The thickness of the synergistic porous ceramic plate is 3-18 mm, 20000-50000 conical through holes are formed in each square meter on the synergistic porous ceramic plate, the diameters of large holes of the conical through holes are 3-6 mm, the diameters of small holes of the conical through holes are 2-4 mm, the surface of the large hole surface of the synergistic porous ceramic plate is in a wave shape with fluctuation up and down, the wave crest of the wave is 0.7-1 mm higher than the plane of a ceramic plate substrate, and the wave trough is 0.6-2 mm lower than the plane of the substrate.
The nano titanium dioxide photocatalyst film is formed on the wavy surface and the inner wall of the conical hole of the synergistic porous ceramic plate, the adhesion amount of the photocatalyst film on each square meter of the ceramic plate is 200-350 g, and the thickness of the film is 13-27 microns.
The catalyst film comprises a bottom film and a wrapping sheet; the bottom film is in a round table shape, the thickness of the bottom film is not more than one centimeter, and the side wall of the bottom film is uniformly and fixedly connected with a wrapping sheet; the top view of the wrapping sheet is triangular, and the wrapping sheet can be folded inwards to form a sealing body with the bottom film; the sealing body is arranged to be conical; when the sealing that needs use the photocatalyst film to make clears up the waters, can tear the parcel piece of sealing side, make the sealing expand into solar shape, and place the sealing on the surface of water, the sealing can float on the surface of water, and through carrying out the perspective transmission to the sunshine of gathering, can realize playing the effect of killing to the bacterium of aquatic, whole use is comparatively simple, need not loaded down with trivial details artificial control, very big manpower resources have been saved, can also play better purifying effect simultaneously.
The upper surface of the wrapping sheet is fixedly connected with a blocking sheet; the blocking pieces are arranged in an arc shape and are uniformly distributed around the circumference; the upper end of the bottom film is in a quadrangular prism shape; when the sealing body is floated on the surface of water after being unfolded, because of the last fixed surface of parcel piece is connected with the separation blade, the separation blade sets up to the arc, and the separation blade sets up to around circumference evenly distributed, so receive wind-force influence and can drive the sealing and rotate on the surface of water because of the separation blade when the sealing is placed on the surface of water, even make the sealing be unset in certain point on the surface of water, but be in the moving state and purify many waters, set up to the four sides prism because of the upper end of basement membrane simultaneously, increased the refraction effect of setting a camera by a wide margin promptly, make purifying effect better.
The invention has the following beneficial effects:
1. according to the preparation process of the nano titanium dioxide photocatalyst film, inorganic synthesis is adopted in the reaction process of the nano titanium dioxide hydrocolloid, no organic solvent is used, no wastewater or waste gas is generated in the reaction process, the preparation process is a clean preparation process, the theoretical yield of titanium dioxide is up to 166%, and compared with other patent processes, the raw material cost is greatly reduced; the nano titanium dioxide aqueous colloidal particles have the particle size of less than 10 nanometers, high crystallinity, strong photocatalytic activity and very good coating performance and film-forming performance on the synergistic porous ceramic plate; can be made into a high-efficiency photocatalyst film to be applied to the field of air and water purification, can oxidize and decompose various toxic and harmful organic pollutants under the irradiation of ultraviolet light, has high formaldehyde removal rate and greatly shortened removal time, and has high sterilization rate and short time.
2. The preparation process of the nanometer titanium dioxide photocatalyst film comprises the step of spraying and sintering the nanometer titanium dioxide aqueous colloid on the synergistic porous ceramic plate through a specific spraying and sintering method, so that the nanometer titanium dioxide photocatalyst film is formed. The synergistic porous ceramic plate has the advantages that the substrate has huge and rough surface area, the surface area can be increased by multiple times through the conical through holes, and the surface area is increased by one to multiple times through the addition of the wavy surface, so that the area of the nano titanium dioxide photocatalyst coated on the synergistic porous ceramic plate is correspondingly increased by more than 5-8 times, the irradiation area of ultraviolet light to the photocatalyst and the contact area of the photocatalyst and toxic and harmful organic gas are greatly increased, the speed and the capacity of decomposing the organic pollutants by photocatalysis are greatly improved, the synergistic porous ceramic plate is mainly made of cordierite and alumina which are inorganic oxides, the titanium dioxide photocatalyst and the porous ceramic plate belong to the same inorganic oxides, the affinity of the titanium dioxide photocatalyst and the porous ceramic plate is strong, and the formed film is not easy to fall off and has long service life.
3. According to the invention, the sealing body is arranged, the wrapping sheet on the side surface of the sealing body is torn, so that the sealing body is unfolded into a sun shape, the sealing body is placed on the water surface, the sealing body can float on the water surface, and the effect of killing bacteria in water can be realized by carrying out perspective transmission on the collected sunlight.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is an expanded top view of the present invention;
FIG. 3 is an expanded cross-sectional view of the present invention;
FIG. 4 is a process flow diagram of the present invention;
in the figure: the film comprises a bottom film 1, a wrapping sheet 2, a sealing body 3 and a blocking sheet 4.
Detailed Description
A process for producing a photocatalyst according to an embodiment of the present invention will be described below with reference to fig. 1 to 4.
As shown in fig. 1 to 4, the preparation process of the photocatalyst according to the present invention comprises the following steps:
s1: putting metal titanium into a glass beaker, adding aqueous hydrogen peroxide to form a mixed solution, wherein the molar ratio of the metal titanium to the hydrogen peroxide is 1: 7; the metal titanium is granular sponge titanium; then placing the glass beaker in an ice-water bath, controlling the temperature of the ice-water bath at 20 ℃, and stirring the mixed solution at a medium speed to form an intermediate reactant;
s2: pouring a certain amount of ammonia water into a flask with a branch pipe and a piston, placing the flask in a hot water bath, controlling the temperature of the water bath to be about 60 ℃, heating to volatilize ammonia to form ammonia vapor, enabling the ammonia vapor to enter an intermediate reactant through the branch pipe, adjusting the pH value of the intermediate reactant to 9 to obtain an adjusted intermediate reactant, wherein the molar ratio of metal titanium to ammonia is 1: 10; then, the intermediate reactant after the adjustment is continuously stirred for 5 hours until a transparent yellow complex aqueous solution is obtained;
s3: transferring the yellow complex aqueous solution obtained in S2 to a flask with a branch pipe, putting the flask into a hot water bath at 60 ℃, and evaporating to remove excessive hydrogen peroxide and ammonia to obtain yellow complex colloid; pouring the yellow complex colloid into a high-pressure reaction kettle, carrying out hydrothermal reaction at 210 ℃ for 5 hours to obtain pure white water-based emulsion, pouring the pure white water-based emulsion into a glass beaker, adding inorganic acid while stirring at normal temperature, and adjusting the pH value of the emulsion to 5 to obtain acidified water-based emulsion;
s4: putting the glass beaker in the S3 into a water bath device at 85 ℃, and continuously stirring for 5 hours to ensure that the acidified water-based emulsion is gradually gelatinized into nano titanium dioxide water-based colloid; spraying nano titanium dioxide aqueous colloid on the wavy surface and the inner wall of a conical hole of the synergistic porous ceramic plate by combining a spray gun, and then drying at the temperature of 180 ℃, wherein the spraying and the drying are alternately repeated for 2 cycles, and after each cycle, the ceramic plate is required to rotate by 150 degrees and then the next cycle is carried out; when in spraying, the inclination angle between a spray head of the spray gun and the synergistic porous ceramic plate is 35 degrees, the synergistic porous ceramic plate is a ceramic substrate the surface of which is provided with a plurality of parallel wave crest surfaces and wave trough surfaces, the wave crest surfaces and the wave trough surfaces are alternately arranged, and the ceramic substrate is provided with a plurality of conical holes;
s5: and (3) sintering the synergistic porous ceramic plate which is sprayed in the S4 in a high-temperature blast oven at the sintering temperature of 600 ℃ for 1.5 hours, and naturally cooling to room temperature to form a nano titanium dioxide photocatalyst film on the surface of the synergistic porous ceramic plate and on the inner wall of the conical hole.
The hydrogen peroxide content in the aqueous hydrogen peroxide solution is 30 percent, and the specific gravity is 1.1 g/ml; the medium-speed stirring speed is 500 revolutions per minute; the content of the ammonia water is 26 percent, and the specific gravity is 0.9 g/ml; the inorganic acid is any one of dilute hydrochloric acid, dilute sulfuric acid or dilute nitric acid; the content of titanium dioxide in the nano titanium dioxide aqueous colloid is 5 wt%.
The thickness of the synergistic porous ceramic plate is 3-18 mm, 20000-50000 conical through holes are formed in each square meter on the synergistic porous ceramic plate, the diameters of large holes of the conical through holes are 3-6 mm, the diameters of small holes of the conical through holes are 2-4 mm, the surface of the large hole surface of the synergistic porous ceramic plate is in a wave shape with fluctuation up and down, the wave crest of the wave is 0.7-1 mm higher than the plane of a ceramic plate substrate, and the wave trough is 0.6-2 mm lower than the plane of the substrate.
The nano titanium dioxide photocatalyst film is formed on the wavy surface and the inner wall of the conical hole of the synergistic porous ceramic plate, the adhesion amount of the photocatalyst film on each square meter of the ceramic plate is 200-350 g, and the thickness of the film is 13-27 microns.
The catalyst film comprises a bottom film 1 and a wrapping sheet 2; the basement membrane 1 is in a circular truncated cone shape, the thickness of the basement membrane 1 is not more than one centimeter, and wrapping sheets 2 are uniformly and fixedly connected to the side walls of the basement membrane 1; the top view of the wrapping sheet 2 is triangular, and the wrapping sheet 2 can be folded inwards to form a sealing body 3 with the base film 1; the sealing body 3 is arranged to be conical; when the sealing 3 that needs use the photocatalyst film to make clears up the waters, can tear the parcel piece 2 of sealing 3 side, make sealing 3 expand into solar shape, and place sealing 3 on the surface of water, sealing 3 can float on the surface of water, and through carrying out the perspective transmission to the sunshine of gathering, can realize playing the effect of exterminating to the bacterium of aquatic, whole use is comparatively simple, need not loaded down with trivial details artificial control, very big manpower resources have been saved, can also play better purifying effect simultaneously.
The upper surface of the wrapping sheet 2 is fixedly connected with a blocking sheet 4; the baffle plates 4 are arc-shaped, and the baffle plates 4 are uniformly distributed around the circumference; the upper end of the bottom film 1 is in a quadrangular prism shape; when the seal 3 is floated on the surface of water after being expanded, because of the last fixed surface of parcel piece 2 is connected with separation blade 4, separation blade 4 sets up to the arc, and separation blade 4 sets up to around circumference evenly distributed, so receive wind-force influence and can drive seal 3 and rotate on the surface of water because of separation blade 4 when seal 3 is placed on the surface of water, even make seal 3 be unset in certain some on the surface of water, but be in the mobile state and purify many waters, set up to the four sides prism because of the upper end of basement membrane 1 simultaneously, the refraction effect of setting a camera has been increased by a wide margin promptly, make purifying effect better.
The specific working process is as follows:
when the sealing body 3 made of a photocatalyst film is needed to clean a water area, the wrapping sheet 2 on the side surface of the sealing body 3 can be torn, so that the sealing body 3 is unfolded into a shape of the sun, the sealing body 3 is placed on the water surface, the sealing body 3 can float on the water surface, and the collected sunlight is transmitted in a perspective manner, so that the effect of killing bacteria in the water can be realized, the whole using process is simple, complicated manual control is not needed, manpower resources are greatly saved, a good purifying effect can be achieved, when the sealing body 3 floats on the water surface after being unfolded, the blocking sheet 4 is fixedly connected to the upper surface of the wrapping sheet 2, the blocking sheet 4 is arc-shaped, and the blocking sheet 4 is uniformly distributed around the circumference, so that the sealing body 3 can be driven to rotate on the water surface due to the influence of wind on the blocking sheet 4 when the sealing body 3 is placed on the water surface, make the seal 3 not fix in a certain point on the surface of water promptly, but be in the mobile state and purify many waters, set up to the four sides prism because of the upper end of basement membrane 1 simultaneously, increased the refraction effect of light promptly by a wide margin for purifying effect is better.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A preparation process of a photocatalyst is characterized in that: the process comprises the following steps:
s1: putting metal titanium into a glass beaker, adding aqueous hydrogen peroxide to form a mixed solution, wherein the molar ratio of the metal titanium to the hydrogen peroxide is 1: 7; the metal titanium is granular sponge titanium; then placing the glass beaker in an ice-water bath, controlling the temperature of the ice-water bath at 20 ℃, and stirring the mixed solution at a medium speed to form an intermediate reactant;
s2: pouring a certain amount of ammonia water into a flask with a branch pipe and a piston, placing the flask in a hot water bath, controlling the temperature of the water bath to be about 60 ℃, heating to volatilize ammonia to form ammonia vapor, enabling the ammonia vapor to enter an intermediate reactant through the branch pipe, adjusting the pH value of the intermediate reactant to 9 to obtain an adjusted intermediate reactant, wherein the molar ratio of metal titanium to ammonia is 1: 10; then, the intermediate reactant after the adjustment is continuously stirred for 5 hours until a transparent yellow complex aqueous solution is obtained;
s3: transferring the yellow complex aqueous solution obtained in S2 to a flask with a branch pipe, putting the flask into a hot water bath at 60 ℃, and evaporating to remove excessive hydrogen peroxide and ammonia to obtain yellow complex colloid; pouring the yellow complex colloid into a high-pressure reaction kettle, carrying out hydrothermal reaction at 210 ℃ for 5 hours to obtain pure white water-based emulsion, pouring the pure white water-based emulsion into a glass beaker, adding inorganic acid while stirring at normal temperature, and adjusting the pH value of the emulsion to 5 to obtain acidified water-based emulsion;
s4: putting the glass beaker in the S3 into a water bath device at 85 ℃, and continuously stirring for 5 hours to ensure that the acidified water-based emulsion is gradually gelatinized into nano titanium dioxide water-based colloid; spraying nano titanium dioxide aqueous colloid on the wavy surface and the inner wall of a conical hole of the synergistic porous ceramic plate by combining a spray gun, and then drying at the temperature of 180 ℃, wherein the spraying and the drying are alternately repeated for 2 cycles, and after each cycle, the ceramic plate is required to rotate by 150 degrees and then the next cycle is carried out; when in spraying, the inclination angle between a spray head of the spray gun and the synergistic porous ceramic plate is 35 degrees, the synergistic porous ceramic plate is a ceramic substrate the surface of which is provided with a plurality of parallel wave crest surfaces and wave trough surfaces, the wave crest surfaces and the wave trough surfaces are alternately arranged, and the ceramic substrate is provided with a plurality of conical holes;
s5: and (3) sintering the synergistic porous ceramic plate which is sprayed in the S4 in a high-temperature blast oven at the sintering temperature of 600 ℃ for 1.5 hours, and naturally cooling to room temperature to form a nano titanium dioxide photocatalyst film on the surface of the synergistic porous ceramic plate and on the inner wall of the conical hole.
2. The process according to claim 1, wherein: the hydrogen peroxide content in the aqueous hydrogen peroxide solution is 30 percent, and the specific gravity is 1.1 g/ml; the medium-speed stirring speed is 500 revolutions per minute; the content of the ammonia water is 26 percent, and the specific gravity is 0.9 g/ml; the inorganic acid is any one of dilute hydrochloric acid, dilute sulfuric acid or dilute nitric acid; the content of titanium dioxide in the nano titanium dioxide aqueous colloid is 5 wt%.
3. The process according to claim 1, wherein: the thickness of the synergistic porous ceramic plate is 3-18 mm, 20000-50000 conical through holes are formed in each square meter on the synergistic porous ceramic plate, the diameters of large holes of the conical through holes are 3-6 mm, the diameters of small holes of the conical through holes are 2-4 mm, the surface of the large hole surface of the synergistic porous ceramic plate is in a wave shape with fluctuation up and down, the wave crest of the wave is 0.7-1 mm higher than the plane of a ceramic plate substrate, and the wave trough is 0.6-2 mm lower than the plane of the substrate.
4. The process according to claim 1, wherein: the nano titanium dioxide photocatalyst film is formed on the wavy surface and the inner wall of the conical hole of the synergistic porous ceramic plate, the adhesion amount of the photocatalyst film on each square meter of the ceramic plate is 200-350 g, and the thickness of the film is 13-27 microns.
5. The process according to claim 1, wherein: the catalyst film comprises a bottom film (1) and a wrapping sheet (2); the basement membrane (1) is in a round table shape, the thickness of the basement membrane (1) is not more than one centimeter, and wrapping sheets (2) are uniformly and fixedly connected to the side walls of the basement membrane (1); the top view of the wrapping sheet (2) is triangular, and the wrapping sheet (2) can be folded inwards to form a sealing body (3) with the bottom film (1); the sealing body (3) is conical.
6. The process according to claim 5, wherein: the upper surface of the wrapping sheet (2) is fixedly connected with a blocking sheet (4); the blocking pieces (4) are arranged in an arc shape, and the blocking pieces (4) are uniformly distributed around the circumference; the upper end of the bottom film (1) is in a quadrangular prism shape.
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|---|---|---|---|
| CN201911089835.8A CN110694605A (en) | 2019-11-08 | 2019-11-08 | Preparation process of photocatalyst |
| CN202010136765.3A CN111167426A (en) | 2019-11-08 | 2020-03-02 | Preparation process of photocatalyst |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911089835.8A CN110694605A (en) | 2019-11-08 | 2019-11-08 | Preparation process of photocatalyst |
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| CN202010136765.3A Pending CN111167426A (en) | 2019-11-08 | 2020-03-02 | Preparation process of photocatalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111167426A (en) * | 2019-11-08 | 2020-05-19 | 梁良良 | Preparation process of photocatalyst |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003175542A (en) * | 2001-12-11 | 2003-06-24 | Asahi Glass Co Ltd | Photocatalyst carrying porous polytetrafluoroethylene sheet |
| CN1274409C (en) * | 2004-06-25 | 2006-09-13 | 清华大学 | Preparation method of highly active titanium dioxide membrane photocatalyst |
| CN104226287B (en) * | 2014-08-18 | 2017-01-25 | 江苏恒智纳米科技有限公司 | Preparation method of nano titanium dioxide photocatalyst thin film |
| CN104785232A (en) * | 2015-03-17 | 2015-07-22 | 珠海全程科技有限公司 | Low-temperature preparation method for high-activity nano titanium dioxide thin film loaded on ceramic |
| CN110694605A (en) * | 2019-11-08 | 2020-01-17 | 梁良良 | Preparation process of photocatalyst |
-
2019
- 2019-11-08 CN CN201911089835.8A patent/CN110694605A/en not_active Withdrawn
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| CN111167426A (en) * | 2019-11-08 | 2020-05-19 | 梁良良 | Preparation process of photocatalyst |
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