CN111268914A - Self-luminous continuous photocatalytic indoor purification microsphere and preparation method thereof - Google Patents
Self-luminous continuous photocatalytic indoor purification microsphere and preparation method thereof Download PDFInfo
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- 230000001699 photocatalysis Effects 0.000 title claims abstract description 97
- 239000004005 microsphere Substances 0.000 title claims abstract description 73
- 238000000746 purification Methods 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 75
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 50
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000843 powder Substances 0.000 claims abstract description 42
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 34
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 33
- 239000000853 adhesive Substances 0.000 claims abstract description 32
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- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 32
- 238000002156 mixing Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
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- 238000005245 sintering Methods 0.000 claims abstract description 22
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- 238000001035 drying Methods 0.000 claims abstract description 19
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 19
- -1 europium activated yttrium oxide Chemical class 0.000 claims description 26
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 20
- 238000005453 pelletization Methods 0.000 claims description 13
- 239000004408 titanium dioxide Substances 0.000 claims description 11
- 229910052693 Europium Inorganic materials 0.000 claims description 10
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 10
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- 238000003756 stirring Methods 0.000 claims description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 claims description 7
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 claims description 7
- 235000012538 ammonium bicarbonate Nutrition 0.000 claims description 7
- 239000001099 ammonium carbonate Substances 0.000 claims description 7
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 5
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 5
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 229910052684 Cerium Inorganic materials 0.000 claims description 3
- 229910052771 Terbium Inorganic materials 0.000 claims description 3
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 claims description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 2
- 229910052980 cadmium sulfide Inorganic materials 0.000 claims description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 2
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- 238000010998 test method Methods 0.000 description 8
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 6
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 6
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- 241000894006 Bacteria Species 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
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- 229910052746 lanthanum Inorganic materials 0.000 description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 2
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
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- 239000012855 volatile organic compound Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C11/00—Multi-cellular glass ; Porous or hollow glass or glass particles
- C03C11/007—Foam glass, e.g. obtained by incorporating a blowing agent and heating
-
- 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
- B01D53/007—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 by irradiation
-
- 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
- B01D53/8678—Removing components of undefined structure
- B01D53/8687—Organic components
-
- 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
- B01J21/08—Silica
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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
- 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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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/10—Forming beads
- C03B19/108—Forming porous, sintered or foamed beads
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/12—Compositions for glass with special properties for luminescent glass; for fluorescent glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
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Abstract
The invention belongs to the field of indoor air cleaning materials, and particularly relates to a self-luminous continuous photocatalytic indoor purification microsphere and a preparation method thereof. Adding nano pure silicon dioxide into absolute ethyl alcohol to form liquid glass, then adding a pore-forming agent, a nano photocatalytic material, rare earth fluorescent powder and an adhesive, mixing, granulating, pressing into microspheres, heating, drying and sintering at high temperature to obtain the self-luminous continuous photocatalytic indoor purification microspheres. The method has the advantages that the porous fluorescent glass microspheres containing the photocatalytic material are formed, the light transmittance is good, the nano photocatalytic material in the microspheres is directly contacted with air through the pore channels, the light energy utilization rate and the photocatalytic degradation efficiency are improved, the effect of efficiently purifying air under the light and in the dark is realized, the microspheres can be placed indoors, the air quality can be remarkably improved, and the decorative effect is also realized at night.
Description
Technical Field
The invention relates to the field of indoor air cleaning materials, in particular to preparation of a photocatalytic material, and particularly relates to a self-luminous continuous photocatalytic indoor purification microsphere and a preparation method thereof.
Background
With the improvement of living standard and health consciousness, the requirements of people on the quality of life are higher and higher, and people generally pursue the life in beautiful and clean environments. At present, various organic pollutants (VOCs, bacteria and the like) and inorganic pollutants (NO) in the airx、SO2Etc.) have serious environmental impact and threaten human health. These pollutants are typically derived from industrial waste gas emissions, domestic pollution sources, and traffic pollution sources. The traditional gas purification technology generally has large investment, long period and high operating cost, and the treatment effect is difficult to meet increasingly strict emission regulations, so people are seeking new methods and approaches. Semiconductor photocatalysis technology which has emerged in recent years has attracted much attention because of its low energy consumption and strong oxidation performance.
In the photocatalytic air purification material, the nano photocatalytic material, such as titanium dioxide, zinc oxide and the like, can effectively decompose organic pollutants and bacteria in the surrounding environment under the irradiation of external light, thereby providing a clean environment for people. However, the nano photocatalytic material can only play a role in purification under the irradiation of light, and if the light source is turned off, the nano photocatalytic material does not have a photocatalytic function in a dark environment. The energy storage luminescent material, also called long afterglow luminescent material, can absorb external light source including ultraviolet light, sunlight, illumination light and the like, and can slowly emit light when the light source is turned off, thereby having the function of display decoration. Therefore, people can combine the two materials to realize the purification function under the light and in the dark.
The Chinese patent application No. 200410009236.8 discloses an energy storage photocatalytic material, wherein an energy storage long afterglow luminescent material and a photocatalytic material are compounded together to form a new energy storage photocatalytic material by any one of the following modes: (1) preparing energy storage luminescent materials on various substrates into luminescent glaze, and then fixing a photocatalytic material on the surface of the luminescent glaze; (2) preparing an energy storage luminescent material into luminescent ceramic, and then fixing a photocatalytic material on the surface of the luminescent ceramic; (3) the energy storage luminescent material is made into luminescent glass, and then the photocatalytic material is fixed on the surface; (4) mixing the energy-storage luminescent material and the photocatalytic material in the coating to prepare the functional coating with the energy-storage photocatalytic function; (5) preparing an energy storage luminescent material into luminescent paint, and then fixing a photocatalytic material on the surface of the paint; (6) the energy storage luminescent material is made into luminescent ink, and the photocatalytic material is fixed on the surface of the ink after curing.
Chinese invention patent application number 201610102893.X discloses a fluorescence doped carbon nano N, B, S-CDs and a preparation method and application thereof, wherein citric acid, boric acid, thiourea and ethylenediamine are used as a pre-polymer in the method; providing a carbon source by citric acid, providing a nitrogen source by ethylenediamine, providing a boron source by boric acid, and providing a sulfur source by thiourea to prepare the NBS-CDs.
Chinese patent application No. 201610834062.1 discloses a preparation method and application of Mn-doped lanthanum titanate photocatalyst fluorescent powder. The chemical molecular formula of the photocatalyst fluorescent powder is as follows: MnxLa2-xTiO5-0.5xWherein x is not less than 0.01 and not more than 0.4, and the preparation method comprises the following steps: firstly, preparing lanthanum titanate gel, doping manganese ions, and synthesizing corresponding powder at low temperature by adopting a self-propagating combustion method; according to the photocatalytic effect and the luminous intensity, the powder with the manganese doping amount of 10% has the best photocatalytic performance, and the powder with the manganese doping amount of 3% has the strongest luminous performance.
Chinese patent application No. 200410003459.3 discloses a multifunctional ceramic coating and a preparation method thereof, wherein two ceramic glaze frits are respectively heated and melted at 700-1200 ℃ and water quenched, then the frits are crushed to obtain frit powder, then the powder of the first frit is ball-milled by taking water as a medium, then the obtained slurry is dipped, sprayed or printed on the surface of a substrate, and then the substrate is placed in an air furnace for calcination to obtain a ground glaze layer; then, taking alcohol as a medium, ball-milling the energy storage long afterglow luminescent material, then dipping, spraying or printing the obtained slurry on the surface of the ground coat layer, and drying in an oven at low temperature until no fluidity exists to obtain a long afterglow energy storage luminescent material layer; powder of a second ceramic frit using water as a mediumBall-milling, dipping, spraying or printing the obtained slurry on the surface of the luminescent material layer, then placing the whole sample in an air furnace for calcining, and cooling to obtain a luminescent glaze layer; finally adding TiO2Or coating ZnO sol on the surface of the luminous glaze layer and calcining.
According to the above, the catalytic efficiency of the photocatalytic material for photocatalytic air purification in the existing scheme is excessively dependent on illumination, while the existing technology of compounding the energy storage luminescent material and the photocatalytic material is not ideal when used for air purification.
Disclosure of Invention
Aiming at the problem that the catalytic efficiency of the air purification photocatalytic material which is widely applied at present depends excessively on illumination, and the existing technology of compounding the energy storage luminescent material and the photocatalytic material has unsatisfactory air purification effect, the invention provides the indoor purification microsphere of the self-luminous continuous photocatalysis and the preparation method thereof, thereby effectively improving the air purification capability of the photocatalytic material in the dark and realizing the purpose of degrading pollutants in the air by all-weather continuous photocatalysis.
The invention relates to a specific technical scheme as follows:
a preparation method of self-luminous continuous photocatalytic indoor purification microspheres comprises the following steps:
(1) adding nanoscale pure silicon dioxide into absolute ethyl alcohol, and uniformly stirring to obtain liquid glass;
(2) adding a pore-forming agent, a nano photocatalytic material, rare earth fluorescent powder and an adhesive into the liquid glass prepared in the step (1), uniformly mixing in a mixing device, and then transferring the mixture into a pelletizing device to prepare particles;
(3) heating and drying the particles prepared in the step (2) to volatilize the pore-forming agent, so as to obtain microspheres with micropores on the surfaces;
(4) and (4) sintering the microspheres with the micropores on the surfaces, which are prepared in the step (3), at a high temperature, and collecting to obtain the self-luminous continuous photocatalytic indoor purification microspheres.
The rare earth fluorescent powder is an inorganic powder material containing rare earth elements and capable of emitting fluorescence under the excitation of external energy, and has excellent energy storage and luminescence properties. Liquid glass forms a hydrophobic layer that is strongly repellent to water, like glass, but is resistant to heat, acid and ultraviolet radiation. The rare earth fluorescent powder, the nano photocatalytic material and the pore-forming agent are dispersed in the liquid glass to be compounded into the porous fluorescent glass microsphere with the air purification function, and the glass microsphere has good light transmission, so that the fluorescence emitted by the rare earth fluorescent powder can effectively act on the photocatalytic material under the weak light or night condition, so that the glass microsphere has the function of efficiently catalyzing and degrading organic pollutants under the light and in the dark, and the purpose of all-weather continuous photocatalysis is realized.
Preferably, in the step (1), 40-50 parts by weight of nano-grade pure silica and 50-60 parts by weight of absolute ethyl alcohol.
Preferably, the pore-forming agent in step (2) is at least one of sodium bicarbonate and ammonium bicarbonate.
Preferably, the nano photocatalytic material in the step (2) is at least one of titanium dioxide, zinc oxide, tin oxide, zirconium dioxide and cadmium sulfide.
Preferably, the rare earth phosphor in step (2) is at least one of europium-activated yttrium oxide, cerium-activated magnesium aluminate, terbium-activated magnesium aluminate, and europium-activated magnesium barium aluminate.
Preferably, the adhesive in the step (2) is polytetrafluoroethylene emulsion with the mass concentration of 8%.
Preferably, in the step (2), 4-6 parts by weight of pore-forming agent, 25-30 parts by weight of nano photocatalytic material, 15-20 parts by weight of rare earth fluorescent powder, 5-8 parts by weight of adhesive and 36-51 parts by weight of liquid glass.
Preferably, the temperature of the heating and drying in the step (3) is 80-100 ℃, and the time is 50-60 min.
Preferably, the temperature of the high-temperature sintering in the step (4) is 200-300 ℃, and the time is 2-3 h.
The invention also provides the self-luminous continuous photocatalytic indoor purification microsphere prepared by the preparation method. Firstly, adding nanoscale pure silicon dioxide into absolute ethyl alcohol, uniformly stirring to obtain liquid glass, then adding a pore-forming agent, a nano photocatalytic material, rare earth fluorescent powder and an adhesive into the liquid glass, and mixing in a mixing device; and (3) moving the uniformly mixed material into a pelletizing device, pelletizing, heating and drying to volatilize the pore-forming agent to obtain microspheres with micropores on the surfaces, and further sintering at high temperature to obtain the product.
The invention provides a self-luminous continuous photocatalytic indoor purification microsphere and a preparation method thereof, compared with the prior art, the self-luminous continuous photocatalytic indoor purification microsphere has the outstanding characteristics and excellent effects that:
1. a method for preparing self-luminous continuous photocatalytic indoor purification microspheres by forming porous fluorescent glass microspheres containing a photocatalytic material is provided.
2. By forming the porous fluorescent glass microspheres containing the photocatalytic material, the function of efficiently catalyzing and degrading organic pollutants under the light and in the dark is realized, and the purpose of continuously catalyzing and degrading pollutants in the air in all weather can be realized.
3. Through the porous structure of the porous fluorescent glass microsphere, the nano photocatalytic material in the microsphere is directly contacted with the air through the pore channel, so that the light energy utilization rate and the photocatalytic degradation efficiency are improved.
4. The microsphere prepared by the invention can be placed indoors, the air quality can be obviously improved, and the microsphere can play a decorative role at night.
Drawings
FIG. 1: schematic diagram of the apparatus testing air purification.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments, but it should not be construed that the scope of the present invention is limited to the following examples. Various substitutions and alterations can be made by those skilled in the art and by conventional means without departing from the spirit of the method of the invention described above.
Example 1
The preparation process comprises the following steps:
(1) adding nanoscale pure silicon dioxide into absolute ethyl alcohol, and uniformly stirring to obtain liquid glass; wherein, 42 parts by weight of nano-grade pure silicon dioxide and 58 parts by weight of absolute ethyl alcohol;
(2) adding a pore-forming agent, a nano photocatalytic material, rare earth fluorescent powder and an adhesive into the liquid glass prepared in the step (1), uniformly mixing in a mixing device, and then transferring the mixture into a pelletizing device to prepare particles; the pore-forming agent is sodium bicarbonate; the nano photocatalytic material is titanium dioxide; the rare earth fluorescent powder is europium activated yttrium oxide; the adhesive is polytetrafluoroethylene emulsion with the mass concentration of 8%; 5 parts of pore-forming agent, 26 parts of nano photocatalytic material, 16 parts of rare earth fluorescent powder, 6 parts of adhesive and 47 parts of liquid glass;
(3) heating and drying the particles prepared in the step (2) to volatilize the pore-forming agent, so as to obtain microspheres with micropores on the surfaces; heating to dry at 85 deg.C for 58 min;
(4) sintering the microspheres with micropores on the surfaces prepared in the step (3) at a high temperature, and collecting to obtain self-luminous continuous photocatalytic indoor purification microspheres; the high-temperature sintering temperature is 250 ℃, and the time is 3 h.
The test method comprises the following steps:
10g of the microspheres obtained in example 1 were taken and placed in a chamber having a volume of 5m3As shown in figure 1. Firstly, measuring the initial concentration of formaldehyde by using a formaldehyde concentration tester, irradiating by using an incandescent lamp at the temperature of 25 ℃, and calculating the formaldehyde removal rate by measuring the formaldehyde concentration for 3 hours; under the same conditions, the light source was removed and the formaldehyde purification rate was tested for 3h in the dark as shown in table 1.
Example 2
The preparation process comprises the following steps:
(1) adding nanoscale pure silicon dioxide into absolute ethyl alcohol, and uniformly stirring to obtain liquid glass; wherein, 48 weight parts of nano-grade pure silicon dioxide and 52 weight parts of absolute ethyl alcohol;
(2) adding a pore-forming agent, a nano photocatalytic material, rare earth fluorescent powder and an adhesive into the liquid glass prepared in the step (1), uniformly mixing in a mixing device, and then transferring the mixture into a pelletizing device to prepare particles; the pore-forming agent is ammonium bicarbonate; the nano photocatalytic material is titanium dioxide; the rare earth fluorescent powder is cerium activated magnesium aluminate; the adhesive is polytetrafluoroethylene emulsion with the mass concentration of 8%; wherein, the pore-forming agent comprises 6 parts by weight of pore-forming agent, 29 parts by weight of nano photocatalytic material, 19 parts by weight of rare earth fluorescent powder, 7 parts by weight of adhesive and 39 parts by weight of liquid glass;
(3) heating and drying the particles prepared in the step (2) to volatilize the pore-forming agent, so as to obtain microspheres with micropores on the surfaces; heating to dry at 95 deg.C for 52 min;
(4) sintering the microspheres with micropores on the surfaces prepared in the step (3) at a high temperature, and collecting to obtain self-luminous continuous photocatalytic indoor purification microspheres; the high-temperature sintering temperature is 280 ℃, and the time is 2 hours.
The test method comprises the following steps:
10g of the microspheres obtained in example 2 were taken and placed in a chamber having a volume of 5m3In the formaldehyde closed chamber, firstly, a formaldehyde concentration tester is adopted to measure the initial concentration of formaldehyde, an incandescent lamp is adopted to irradiate at the temperature of 25 ℃, and the formaldehyde removal rate is calculated according to the formaldehyde concentration when the formaldehyde is tested for 3 hours; under the same conditions, the light source was removed and the formaldehyde purification rate was tested for 3h in the dark as shown in table 1.
Example 3
The preparation process comprises the following steps:
(1) adding nanoscale pure silicon dioxide into absolute ethyl alcohol, and uniformly stirring to obtain liquid glass; wherein, 40 weight parts of nano-grade pure silicon dioxide and 60 weight parts of absolute ethyl alcohol;
(2) adding a pore-forming agent, a nano photocatalytic material, rare earth fluorescent powder and an adhesive into the liquid glass prepared in the step (1), uniformly mixing in a mixing device, and then transferring the mixture into a conventional pelletizing machine for pelletizing to prepare particles; the pore-forming agent is sodium bicarbonate; the nano photocatalytic material is titanium dioxide; the rare earth fluorescent powder is terbium-activated magnesium aluminate; the adhesive is polytetrafluoroethylene emulsion with the mass concentration of 8%; wherein, the pore-forming agent comprises 4 parts by weight of pore-forming agent, 25 parts by weight of nano photocatalytic material, 15 parts by weight of rare earth fluorescent powder, 5 parts by weight of adhesive and 51 parts by weight of liquid glass;
(3) heating and drying the particles prepared in the step (2) to volatilize the pore-forming agent, so as to obtain microspheres with micropores on the surfaces; heating to dry at 80 deg.C for 60 min;
(4) sintering the microspheres with micropores on the surfaces prepared in the step (3) at a high temperature, and collecting to obtain self-luminous continuous photocatalytic indoor purification microspheres; the temperature of the high-temperature sintering is 200 ℃, and the time is 3 h.
The test method comprises the following steps:
10g of the microspheres obtained in example 3 were taken and placed in a chamber having a volume of 5m3In the formaldehyde closed chamber, firstly, a formaldehyde concentration tester is adopted to measure the initial concentration of formaldehyde, an incandescent lamp is adopted to irradiate at the temperature of 25 ℃, and the formaldehyde removal rate is calculated according to the formaldehyde concentration when the formaldehyde is tested for 3 hours; under the same conditions, the light source was removed and the formaldehyde purification rate was tested for 3h in the dark as shown in table 1.
Example 4
The preparation process comprises the following steps:
(1) adding nanoscale pure silicon dioxide into absolute ethyl alcohol, and uniformly stirring to obtain liquid glass; wherein, 50 weight parts of nano pure silicon dioxide and 50 weight parts of absolute ethyl alcohol;
(2) adding a pore-forming agent, a nano photocatalytic material, rare earth fluorescent powder and an adhesive into the liquid glass prepared in the step (1), uniformly mixing in a mixing device, and then transferring the mixture into a pelletizing device to prepare particles; the pore-forming agent is ammonium bicarbonate; the nano photocatalytic material is titanium dioxide; the rare earth fluorescent powder is europium-activated magnesium barium aluminate; the adhesive is polytetrafluoroethylene emulsion with the mass concentration of 8%; wherein, the pore-forming agent comprises 6 parts by weight of pore-forming agent, 30 parts by weight of nano photocatalytic material, 20 parts by weight of rare earth fluorescent powder, 8 parts by weight of adhesive and 36 parts by weight of liquid glass;
(3) heating and drying the particles prepared in the step (2) to volatilize the pore-forming agent, so as to obtain microspheres with micropores on the surfaces; heating and drying at 100 deg.C for 50 min;
(4) sintering the microspheres with micropores on the surfaces prepared in the step (3) at a high temperature, and collecting to obtain self-luminous continuous photocatalytic indoor purification microspheres; the high-temperature sintering temperature is 220 ℃ and the time is 2 h.
The test method comprises the following steps:
10g of the microspheres obtained in example 4 were taken and placed in a chamber having a volume of 5m3In the formaldehyde closed chamber, firstly, a formaldehyde concentration tester is adopted to measure the initial concentration of formaldehyde, an incandescent lamp is adopted to irradiate at the temperature of 25 ℃, and the formaldehyde removal rate is calculated according to the formaldehyde concentration when the formaldehyde is tested for 3 hours; under the same conditions, the light source was removed and the formaldehyde purification rate was tested for 3h in the dark as shown in table 1.
Example 5
The preparation process comprises the following steps:
(1) adding nanoscale pure silicon dioxide into absolute ethyl alcohol, and uniformly stirring to obtain liquid glass; wherein, 44 weight parts of nano pure silicon dioxide and 56 weight parts of absolute ethyl alcohol;
(2) adding a pore-forming agent, a nano photocatalytic material, rare earth fluorescent powder and an adhesive into the liquid glass prepared in the step (1), uniformly mixing in a mixing device, and then transferring the mixture into a pelletizing device to prepare particles; the pore-forming agent is sodium bicarbonate; the nano photocatalytic material is titanium dioxide; the rare earth fluorescent powder is europium activated yttrium oxide; the adhesive is polytetrafluoroethylene emulsion with the mass concentration of 8%; 5 parts of pore-forming agent, 27 parts of nano photocatalytic material, 17 parts of rare earth fluorescent powder, 7 parts of adhesive and 44 parts of liquid glass;
(3) heating and drying the particles prepared in the step (2) to volatilize the pore-forming agent, so as to obtain microspheres with micropores on the surfaces; heating to dry at 88 deg.C for 56 min;
(4) sintering the microspheres with micropores on the surfaces prepared in the step (3) at a high temperature, and collecting to obtain self-luminous continuous photocatalytic indoor purification microspheres; the high-temperature sintering temperature is 260 ℃, and the time is 2.5 h.
The test method comprises the following steps:
10g of the microspheres obtained in example 5 were taken and placed in a chamber having a volume of 5m3In the formaldehyde closed chamber, firstly, the initial concentration of formaldehyde is measured by a formaldehyde concentration tester, an incandescent lamp is used for irradiating at the temperature of 25 ℃, and a formaldehyde concentration meter is used for testing for 3 hoursCalculating the formaldehyde removal rate; under the same conditions, the light source was removed and the formaldehyde purification rate was tested for 3h in the dark as shown in table 1.
Example 6
The preparation process comprises the following steps:
(1) adding nanoscale pure silicon dioxide into absolute ethyl alcohol, and uniformly stirring to obtain liquid glass; wherein, 45 weight parts of nano-grade pure silicon dioxide and 55 weight parts of absolute ethyl alcohol;
(2) adding a pore-forming agent, a nano photocatalytic material, rare earth fluorescent powder and an adhesive into the liquid glass prepared in the step (1), uniformly mixing in a mixing device, and then transferring the mixture into a pelletizing device to prepare particles; the pore-forming agent is ammonium bicarbonate; the nano photocatalytic material is titanium dioxide; the rare earth fluorescent powder is europium-activated magnesium barium aluminate; the adhesive is polytetrafluoroethylene emulsion with the mass concentration of 8%; wherein, the pore-forming agent comprises 5 weight parts of pore-forming agent, 28 weight parts of nano photocatalytic material, 18 weight parts of rare earth fluorescent powder, 6 weight parts of adhesive and 43 weight parts of liquid glass;
(3) heating and drying the particles prepared in the step (2) to volatilize the pore-forming agent, so as to obtain microspheres with micropores on the surfaces; heating and drying at 90 deg.C for 55 min;
(4) sintering the microspheres with micropores on the surfaces prepared in the step (3) at a high temperature, and collecting to obtain self-luminous continuous photocatalytic indoor purification microspheres; the high-temperature sintering temperature is 250 ℃, and the time is 2.5 h.
The test method comprises the following steps:
10g of the microspheres obtained in example 6 were taken and placed in a chamber having a volume of 5m3In the formaldehyde closed chamber, firstly, a formaldehyde concentration tester is adopted to measure the initial concentration of formaldehyde, an incandescent lamp is adopted to irradiate at the temperature of 25 ℃, and the formaldehyde removal rate is calculated according to the formaldehyde concentration when the formaldehyde is tested for 3 hours; under the same conditions, the light source was removed and the formaldehyde purification rate was tested for 3h in the dark as shown in table 1.
Comparative example 1
The preparation process comprises the following steps:
(1) adding nanoscale pure silicon dioxide into absolute ethyl alcohol, and uniformly stirring to obtain liquid glass; wherein, 45 weight parts of nano-grade pure silicon dioxide and 55 weight parts of absolute ethyl alcohol;
(2) adding a pore-forming agent, a nano photocatalytic material and an adhesive into the liquid glass prepared in the step (1), uniformly mixing in a mixing device, and then transferring the mixture into a pelletizing device to prepare particles; the pore-forming agent is ammonium bicarbonate; the nano photocatalytic material is titanium dioxide; the rare earth fluorescent powder is europium-activated magnesium barium aluminate; the adhesive is polytetrafluoroethylene emulsion with the mass concentration of 8%; wherein, the pore-forming agent comprises 5 weight parts of pore-forming agent, 28 weight parts of nano photocatalytic material, 6 weight parts of adhesive and 43 weight parts of liquid glass;
(3) heating and drying the particles prepared in the step (2) to volatilize the pore-forming agent, so as to obtain microspheres with micropores on the surfaces; heating and drying at 90 deg.C for 55 min;
(4) sintering the microspheres with micropores on the surfaces prepared in the step (3) at a high temperature, and collecting to obtain self-luminous continuous photocatalytic indoor purification microspheres; the high-temperature sintering temperature is 250 ℃, and the time is 2.5 h.
The test method comprises the following steps:
10g of the indoor purification microspheres prepared in comparative example 1 were taken and placed in a chamber having a volume of 5m3In the formaldehyde closed chamber, firstly, a formaldehyde concentration tester is adopted to measure the initial concentration of formaldehyde, an incandescent lamp is adopted to irradiate at the temperature of 25 ℃, and the formaldehyde removal rate is calculated according to the formaldehyde concentration when the formaldehyde is tested for 3 hours; under the same conditions, the light source was removed and the formaldehyde purification rate was tested for 3h in the dark as shown in table 1. Since no fluorescent powder is added, the cleaning function is almost absent under dark conditions.
Comparative example 2
The preparation process comprises the following steps:
(1) uniformly mixing a pore-forming agent, a nano photocatalytic material, rare earth fluorescent powder and an adhesive in a mixing device, and then transferring the mixture into a pelletizing device to prepare particles; the pore-forming agent is ammonium bicarbonate; the nano photocatalytic material is titanium dioxide; the rare earth fluorescent powder is europium-activated magnesium barium aluminate; the adhesive is polytetrafluoroethylene emulsion with the mass concentration of 8%; wherein, the pore-forming agent comprises 5 weight parts of pore-forming agent, 28 weight parts of nano photocatalytic material, 18 weight parts of rare earth fluorescent powder and 36 weight parts of adhesive;
(3) heating and drying the particles prepared in the step (2) to volatilize the pore-forming agent, so as to obtain microspheres with micropores on the surfaces; heating and drying at 90 deg.C for 55 min;
(4) sintering the microspheres with micropores on the surfaces prepared in the step (3) at a high temperature, and collecting to obtain self-luminous continuous photocatalytic indoor purification microspheres; the high-temperature sintering temperature is 250 ℃, and the time is 2.5 h.
The test method comprises the following steps:
10g of the indoor purification microspheres prepared in comparative example 2 were taken and placed in a chamber having a volume of 5m3In the formaldehyde closed chamber, firstly, a formaldehyde concentration tester is adopted to measure the initial concentration of formaldehyde, an incandescent lamp is adopted to irradiate at the temperature of 25 ℃, and the formaldehyde removal rate is calculated according to the formaldehyde concentration when the formaldehyde is tested for 3 hours; under the same conditions, the light source was removed and the formaldehyde purification rate was tested for 3h in the dark as shown in table 1. Because nano silicon dioxide solution is not added, the light transmittance of the nano silicon dioxide solution is poor, and the purification effect is influenced.
Table 1:
Claims (10)
1. a preparation method of self-luminous continuous photocatalytic indoor purification microspheres is characterized by comprising the following steps:
(1) adding nanoscale pure silicon dioxide into absolute ethyl alcohol, and uniformly stirring to obtain liquid glass;
(2) adding a pore-forming agent, a nano photocatalytic material, rare earth fluorescent powder and an adhesive into the liquid glass prepared in the step (1), uniformly mixing in a mixing device, and then transferring the mixture into a pelletizing device to prepare particles;
(3) heating and drying the particles prepared in the step (2) to volatilize the pore-forming agent, so as to obtain microspheres with micropores on the surfaces;
(4) and (4) sintering the microspheres with the micropores on the surfaces, which are prepared in the step (3), at a high temperature, and collecting to obtain the self-luminous continuous photocatalytic indoor purification microspheres.
2. The preparation method of the self-luminous continuous photocatalytic indoor purification microsphere as claimed in claim 1, wherein the preparation method comprises the following steps: in the step (1), 40-50 parts by weight of nano-grade pure silicon dioxide and 50-60 parts by weight of absolute ethyl alcohol.
3. The preparation method of the self-luminous continuous photocatalytic indoor purification microsphere as claimed in claim 1, wherein the preparation method comprises the following steps: and (2) the pore-forming agent is at least one of sodium bicarbonate and ammonium bicarbonate.
4. The preparation method of the self-luminous continuous photocatalytic indoor purification microsphere as claimed in claim 1, wherein the preparation method comprises the following steps: the nano photocatalytic material in the step (2) is at least one of titanium dioxide, zinc oxide, tin oxide, zirconium dioxide and cadmium sulfide.
5. The preparation method of the self-luminous continuous photocatalytic indoor purification microsphere as claimed in claim 1, wherein the preparation method comprises the following steps: and (3) the rare earth fluorescent powder in the step (2) is at least one of europium activated yttrium oxide, cerium activated magnesium aluminate, terbium activated magnesium aluminate and europium activated magnesium barium aluminate.
6. The preparation method of the self-luminous continuous photocatalytic indoor purification microsphere as claimed in claim 1, wherein the preparation method comprises the following steps: and (3) the adhesive in the step (2) is polytetrafluoroethylene emulsion with the mass concentration of 8%.
7. The preparation method of the self-luminous continuous photocatalytic indoor purification microsphere as claimed in claim 1, wherein the preparation method comprises the following steps: in the step (2), 4-6 parts by weight of pore-forming agent, 25-30 parts by weight of nano photocatalytic material, 15-20 parts by weight of rare earth fluorescent powder, 5-8 parts by weight of adhesive and 36-51 parts by weight of liquid glass.
8. The preparation method of the self-luminous continuous photocatalytic indoor purification microsphere as claimed in claim 1, wherein the preparation method comprises the following steps: and (4) heating and drying at the temperature of 80-100 ℃ for 50-60 min in the step (3).
9. The preparation method of the self-luminous continuous photocatalytic indoor purification microsphere as claimed in claim 1, wherein the preparation method comprises the following steps: and (4) sintering at the high temperature of 200-300 ℃ for 2-3 h.
10. The self-luminous continuous photocatalytic indoor purification microsphere prepared by the preparation method of any one of claims 1 to 9.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112457615A (en) * | 2020-11-16 | 2021-03-09 | 深圳市正旺环保新材料有限公司 | Stretch-proof and easily-degradable plastic bag and preparation method thereof |
| CN113249056A (en) * | 2021-04-02 | 2021-08-13 | 中国林业科学研究院木材工业研究所 | Flame-retardant luminous formaldehyde-reducing functional additive and preparation method and application thereof |
| WO2024060328A1 (en) * | 2022-09-20 | 2024-03-28 | 江西联锴科技有限公司 | Silicon dioxide-rare earth composite photocatalytic material, preparation method therefor, and application thereof |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112457615A (en) * | 2020-11-16 | 2021-03-09 | 深圳市正旺环保新材料有限公司 | Stretch-proof and easily-degradable plastic bag and preparation method thereof |
| CN112457615B (en) * | 2020-11-16 | 2022-12-02 | 深圳市正旺环保新材料有限公司 | Stretch-proof and easily-degradable plastic bag and preparation method thereof |
| CN113249056A (en) * | 2021-04-02 | 2021-08-13 | 中国林业科学研究院木材工业研究所 | Flame-retardant luminous formaldehyde-reducing functional additive and preparation method and application thereof |
| WO2024060328A1 (en) * | 2022-09-20 | 2024-03-28 | 江西联锴科技有限公司 | Silicon dioxide-rare earth composite photocatalytic material, preparation method therefor, and application thereof |
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