CN112535952A - Preparation method of ceramic tile for purifying VOCs (volatile organic compounds) - Google Patents
Preparation method of ceramic tile for purifying VOCs (volatile organic compounds) Download PDFInfo
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- CN112535952A CN112535952A CN202011542438.4A CN202011542438A CN112535952A CN 112535952 A CN112535952 A CN 112535952A CN 202011542438 A CN202011542438 A CN 202011542438A CN 112535952 A CN112535952 A CN 112535952A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/04—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 adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention belongs to the technical field of functional ceramics, and particularly relates to a preparation method of a ceramic tile for purifying VOCs. And dispersing the porous material loaded with the nano particles into a solvent to obtain a dispersion liquid, and spraying and roasting the dispersion liquid to modify the dispersion liquid on a ceramic tile glaze layer to obtain the ceramic tile for purifying the VOCs. The surface of the glaze layer of the ceramic tile is modified by the nano material for adsorbing and degrading VOCs, namely, the material with developed pore system and high specific surface area, such as porous silicon oxide, molecular sieve and porous alumina, is loaded with the catalyst capable of decomposing VOCs, such as nano titanium oxide, nano manganese oxide, nano zinc oxide and nano gold, so that the ceramic tile has the functions of adsorbing VOCs and decomposing VOCs; the prepared ceramic tile can effectively adsorb and decompose indoor VOCs, and the purpose of purifying VOCs is achieved.
Description
Technical Field
The invention belongs to the technical field of functional ceramics, and particularly relates to a preparation method of a ceramic tile for purifying VOCs.
Background
With the continuous improvement of living standard of people, the requirement on the health of living environment is higher and higher. Indoor VOCs are one of the important factors affecting human health. At present, the elimination of indoor VOCs mainly depends on several ways of ventilation, adsorption and catalytic degradation. However, these methods require special equipment or are not effective, and especially have poor purification effect on the slowly released VOCs in furniture, decoration materials and the like, so an effective method for eliminating the VOCs indoors is needed. The ceramic tile is a common indoor decoration material and has the advantages of good durability, attractive appearance, easy cleaning and the like. If the ceramic tile has the function of eliminating and purifying VOCs, the purification problem of indoor VOCs is undoubtedly effectively solved.
Chinese patent CN205296675U discloses a light purification tile, which provides a hollow tile, and active carbon is filled in the hollow pores to achieve the purpose of adsorbing and purifying VOCs. However, the filled activated carbon cannot be replaced, the adsorption amount of the activated carbon is limited, and after the activated carbon is saturated in adsorption, the absorbed VOCs can be released under certain conditions, so that the effect of continuously purifying the VOCs for a long time cannot be achieved.
Chinese patent CN208152445U discloses an air purification tile, which also adopts a strategy of forming a cavity in the tile blank, then coats a photocatalyst on the supporting structure of the cavity, and sequentially coats an activated carbon layer, a waterproof layer and a dustproof layer on the surface of the cavity. Although the method can achieve the aim of removing VOCs, the cavity structure of the method influences the strength of the ceramic tile.
Chinese patent CN205522721U discloses an air purification function ceramic tile, which provides a ceramic tile with function slider, sets up the filler hole on the function slider, sets up compound anion powder and activated carbon powder in the filler hole, reaches the function of purifying and getting rid of VOCs, but the same with the above-mentioned problem, the activated carbon of packing is difficult to change, and its adsorption capacity is limited, can't reach the effect of continuously purifying VOCs for a long time.
It can be seen from the above patents that most of the tiles for purifying VOCs on the market currently adopt an adsorption means, but the purpose of purifying VOCs for a long time is difficult to achieve due to the limited adsorption capacity of the porous adsorption material.
Disclosure of Invention
The invention aims to provide a preparation method of a ceramic tile for purifying VOCs, wherein the prepared ceramic tile for purifying VOCs is enriched and adsorbed with a porous material in air, and then a photocatalyst and a thermal catalyst on the porous material can catalyze and adsorb VOCs in airVOCs and O in air2And the reaction is carried out, so that the VOCs are degraded, and the aim of purifying the VOCs for a long time is fulfilled.
The preparation method of the ceramic tile for purifying the VOCs comprises the steps of dispersing the porous material loaded with the nano particles into a solvent to obtain a dispersion liquid, and spraying and roasting the dispersion liquid to modify the dispersion liquid on a ceramic tile glaze layer to obtain the ceramic tile for purifying the VOCs.
The nano particles are one or more of nano manganese oxide, nano titanium oxide, nano zinc oxide or nano gold.
The nano-particles are preferably one or more of copper, tin, iron, vanadium, cobalt, nickel, lanthanum or cerium doped nano-particles.
The nano titanium oxide and the nano zinc oxide have photocatalytic performance, and the nano manganese oxide and the nano gold have photocatalytic performance.
The porous material is one or more of a molecular sieve, porous silicon oxide or porous aluminum oxide.
The loading of the nano particles on the porous material is 1-50 wt.%.
The solvent is one or more of water, ethanol or propanol.
The mass of the porous material loading the nano particles in the dispersion liquid is 1-25% of the mass of the dispersion liquid.
The spraying amount is 0.5-20g of porous material loaded with nano particles per square meter.
The preparation method of the ceramic tile for purifying VOCs comprises the following steps:
(1) dispersing the porous material loaded with the nano particles into a solvent to obtain a dispersion liquid;
(2) spraying the dispersion liquid on the preliminarily glazed ceramic tile, drying, spraying glaze, roasting, and cooling to obtain the ceramic tile for purifying VOCs.
The drying temperature in the step (2) is 90-300 ℃, and the drying time is 2-30 min.
The roasting temperature in the step (2) is 650-1200 ℃, and the roasting time is 5-30 min.
The glaze material of the primary glazing in the step (2) and the glaze material of the secondary spraying are the same kind of glaze material.
The spraying amount of the glaze sprayed in the step (2) is 5-20% of the primary glazing amount.
And (3) cooling to room temperature in the step (2).
The invention disperses the porous material loaded with the nano particles with photocatalytic performance and thermocatalytic performance into the solvent to obtain dispersion liquid, and the obtained dispersion liquid is sprayed and roasted to be decorated on the ceramic tile glaze layer, thus obtaining the ceramic tile with the function of purifying VOCs.
The porous material with the catalytic function can be uniformly sprayed on the ceramic tile and can also be sprayed according to a certain pattern.
Aiming at the problem of purifying indoor VOCs polluted for a long time, the method loads nano particles with photocatalysis and thermocatalytic properties on a porous material, and then distributes and fires the porous material on the surface of a ceramic tile glaze layer. The porous material has the function of adsorbing VOCs, and the VOCs adsorbed by the porous material can be decomposed by the nano-particles with catalytic performance under the condition of illumination or heating, so that the aim of purifying the VOCs in the room is fulfilled.
The invention has the following beneficial effects:
the surface of the glaze layer of the ceramic tile is modified by the nano material for adsorbing and degrading VOCs, namely, the material with developed pore system and high specific surface area, such as porous silicon oxide, molecular sieve and porous alumina, is loaded with the catalyst capable of decomposing VOCs, such as nano titanium oxide, nano manganese oxide, nano zinc oxide and nano gold, so that the ceramic tile has the functions of adsorbing VOCs and decomposing VOCs; the prepared ceramic tile can effectively adsorb and decompose indoor VOCs, and the purpose of purifying VOCs is achieved.
According to the invention, the porous material loaded with the nano particles is more uniformly distributed and has better catalytic effect by spraying the dispersion liquid on the primarily glazed ceramic tile and spraying the glaze again after drying.
Detailed Description
The present invention is further described below with reference to examples.
Example 1
Mixing Cu0.1Ce0.15Ti0.75O2(XRD test, calculated using the Sheer equation, showed an average particle size of 23.4nm) was loaded onto porous silica at a loading of 10 wt.%. Dispersing 10g of loaded porous silicon oxide into 100mL of deionized water, uniformly spraying the porous silicon oxide onto 5 square meters of primarily glazed ceramic tiles, drying at 120 ℃ for 5min, spraying colorless glaze with 10 wt.% of primary glazing amount, roasting at 950 ℃ for 10min, and cooling to room temperature to obtain the ceramic tiles with the function of purifying VOCs.
The ceramic tile is placed in a sealed organic glass box containing 200ppm of formaldehyde and 10L in volume for VOCs purification test, the ceramic tile is placed for 1h at the temperature of 25 ℃ in simulated daylight lamp illumination, the formaldehyde content in the air after reaction is measured by gas chromatography, the formaldehyde content is 10ppm, the time is increased by 1h, and the formaldehyde content is 3 ppm.
Long-term catalytic performance testing: the ceramic tile is placed in a 10L sealed organic glass box, formaldehyde containing 200ppm is introduced at the flow rate of 10L/h for VOCs purification test, in simulated fluorescent lamp illumination, the temperature is 25 ℃, the outlet formaldehyde content is measured by gas chromatography every 2h, continuous test is carried out for 30 days, the result shows that the formaldehyde content at the outlet is lower than 12ppm, and the result shows that the ceramic tile has the effect of removing indoor VOCs for a long time.
Example 2
Mixing Co0.1V0.05Mn0.35Zn0.5O1.475(XRD test, calculated by Shele's formula, showed an average particle size of 17.8nm) was loaded on the Y-type molecular sieve at a loading of 10 wt.%. Dispersing 5g of the loaded Y-shaped molecular sieve into 100mL of ethanol, uniformly spraying the Y-shaped molecular sieve onto 2 square meters of primarily glazed ceramic tiles, drying at 90 ℃ for 5min, spraying colorless glaze with the primary glazing amount of 8 wt.%, roasting at 1000 ℃ for 5min, and cooling to room temperature to obtain the ceramic tiles with the function of purifying VOCs.
The ceramic tile is placed in a sealed organic glass box containing 200ppm of formaldehyde and ethanol mixed gas for VOCs purification test, the ceramic tile is placed for 1h at the temperature of 25 ℃ in simulated fluorescent lamp illumination, the content of formaldehyde and ethanol in the air is measured by gas chromatography, the content of formaldehyde and ethanol is 6ppm, the time is increased by 1h, and the content of formaldehyde and ethanol is 2.8 ppm.
The long-term catalytic performance test method is the same as that in example 1, and the test is carried out continuously for 30 days, and the result shows that the content of formaldehyde and ethanol at the outlet is lower than 6 ppm.
Example 3
Mixing Au/Ni0.1La0.05Ti0.85O1.9(XRD test, calculated using scherrer equation, showed an average particle size of 25.2nm) was loaded on porous alumina at 15 wt.%. Dispersing 6g of loaded porous alumina into 100mL of propanol, uniformly spraying the porous alumina onto 10 square meters of primarily glazed ceramic tiles, drying at 120 ℃ for 5min, spraying colorless glaze with the primary glazing amount of 12 wt.%, roasting at 1050 ℃ for 10min, and cooling to room temperature to obtain the ceramic tiles with the function of purifying VOCs.
The ceramic tile is placed in a sealed organic glass box containing 200ppm of formaldehyde and toluene mixed gas for VOCs purification test, the ceramic tile is placed for 1h at the temperature of 25 ℃ in simulated fluorescent lamp illumination, the content of formaldehyde and toluene in the air is measured by gas chromatography, the content of formaldehyde and toluene is 15ppm, the time is increased by 1h, and the content of formaldehyde and toluene is 10.3 ppm.
The long-term catalytic performance test method is the same as that in example 1, and the test is carried out continuously for 30 days, and the results show that the content of formaldehyde and toluene at the outlet is lower than 16 ppm.
Example 4
Adding TiO into the mixture2(XRD test, calculated using scherrer equation, showed an average particle size of 24.6nm) was loaded on porous alumina at 15 wt.%. Dispersing 6g of loaded porous alumina into 100mL of propanol, uniformly spraying the porous alumina onto 10 square meters of primarily glazed ceramic tiles, drying at 120 ℃ for 5min, spraying colorless glaze with 11.5. wt% of primary glazing amount, roasting at 1050 ℃ for 10min, and cooling to room temperature to obtain the ceramic tiles with the function of purifying VOCs.
The ceramic tile is placed in a sealed organic glass box containing 200ppm of formaldehyde and toluene mixed gas for VOCs purification test, the ceramic tile is placed for 1h at the temperature of 25 ℃ in simulated fluorescent lamp illumination, the content of formaldehyde and toluene in the air is measured by gas chromatography, the content of formaldehyde and toluene is 11ppm, the time is increased by 1h, and the content of formaldehyde and toluene is 4.6 ppm.
The long-term catalytic performance test method is the same as that in example 1, and the test is carried out continuously for 30 days, and the results show that the content of formaldehyde and toluene at the outlet is lower than 12 ppm.
Comparative example 1
Dispersing 10g of porous silicon oxide into 100mL of deionized water, uniformly spraying the porous silicon oxide onto 5 square meters of primarily glazed ceramic tiles, drying at 120 ℃ for 5min, spraying colorless glaze with the amount of 10 wt.% of the primary glazing amount, roasting at 950 ℃ for 10min, and cooling to room temperature to obtain the ceramic tiles.
The ceramic tile is placed in a sealed organic glass box containing 200ppm of formaldehyde and 10L in volume for VOCs purification test, the ceramic tile is placed for 1h at the temperature of 25 ℃ in simulated daylight lamp illumination, the formaldehyde content in the air after reaction is measured by gas chromatography, the formaldehyde content is 153ppm, the time is increased by 1h, and the formaldehyde content is 142 ppm. The formaldehyde reduction is mainly due to adsorption by the porous silica.
The long-term catalytic performance test method is the same as that in example 1, and the test is carried out continuously for 30 days, and the result shows that the formaldehyde content at the outlet is 140-156 ppm.
Comparative example 2
Dispersing 6g of porous alumina into 100mL of propanol, uniformly spraying the porous alumina onto 10 square meters of primarily glazed ceramic tiles, drying at 120 ℃ for 5min, spraying a colorless glaze material with the primary glazing amount of 11.5. wt%, roasting at 1050 ℃ for 10min, and cooling to room temperature to obtain the ceramic tiles.
The ceramic tile is placed in a sealed organic glass box containing 200ppm of formaldehyde and 10L in volume for VOCs purification test, the ceramic tile is placed for 1h at the temperature of 25 ℃ in simulated daylight lamp illumination, the formaldehyde content in the air after reaction is measured by gas chromatography, the formaldehyde content is 173ppm, the time is increased by 1h, and the formaldehyde content is 168 ppm. The formaldehyde reduction is mainly due to adsorption by porous alumina.
The long-term catalytic performance test method is the same as that of example 1, and the test is carried out continuously for 30 days, and the result shows that the formaldehyde content at the outlet is 165-174 ppm.
Comparative example 3
And (3) placing the ceramic tile without the added VOCs catalyst in a sealed organic glass box containing 200ppm of formaldehyde and having a volume of 10L for VOCs purification test, placing the ceramic tile at 25 ℃ for 1h in simulated daylight lamp illumination, measuring the formaldehyde content in the air after reaction by using gas chromatography, wherein the formaldehyde content is 195ppm, and the time is increased by 1h, and the formaldehyde content is 192 ppm.
The long-term catalytic performance test method is the same as that in example 1, and the test is carried out continuously for 30 days, and the result shows that the formaldehyde content at the outlet is 190-198 ppm.
Comparative example 4
Mixing Cu0.1Ce0.15Ti0.75O2(XRD test showed 23.4nm average particle size) was supported on porous silica at 10 wt.%. Dispersing 10g of loaded porous silicon oxide into 100mL of deionized water, uniformly spraying the porous silicon oxide onto 5 square meters of preliminarily glazed ceramic tiles, drying at 120 ℃ for 5min, roasting at 950 ℃ for 10min, and cooling to room temperature to obtain the ceramic tiles with the function of purifying VOCs.
The ceramic tile is placed in a sealed organic glass box containing 200ppm of formaldehyde and 10L in volume for VOCs purification test, the ceramic tile is placed for 1h at the temperature of 25 ℃ in simulated daylight lamp illumination, the formaldehyde content in the air after reaction is measured by gas chromatography, the formaldehyde content is 32ppm, the time is increased by 1h, and the formaldehyde content is 28 ppm.
The long-term catalytic performance test method is the same as that in example 1, and the test is carried out continuously for 30 days, and the results show that the formaldehyde content at the outlet is lower than 35 ppm.
Claims (10)
1. A preparation method of a ceramic tile for purifying VOCs is characterized in that a porous material loaded with nano-particles is dispersed in a solvent to obtain a dispersion liquid, and the dispersion liquid is sprayed and roasted to be modified on a ceramic tile glaze layer to obtain the ceramic tile for purifying VOCs.
2. The method according to claim 1, wherein the nanoparticles are one or more of manganese oxide, titanium oxide, zinc oxide, or gold nanoparticles.
3. The method of claim 2, wherein the nanoparticles are doped with one or more of copper, tin, iron, vanadium, cobalt, nickel, lanthanum, and cerium.
4. The method according to claim 1, wherein the porous material is one or more of molecular sieve, porous silica, and porous alumina.
5. The method of claim 1, wherein the nanoparticles are loaded at a loading of 1-50 wt.% on the porous material.
6. A process for the preparation of a tile for the purification of VOCs as claimed in claim 1, wherein said solvent is one or more of water, ethanol or propanol.
7. The method according to claim 1, wherein the porous material supporting nanoparticles comprises 1-25% by mass of the dispersion.
8. A process for the preparation of a tile for the purification of VOCs as claimed in claim 1, wherein said spraying amount is 0.5-20g of nanoparticle-loaded porous material per square meter.
9. A process for the preparation of tiles for the purification of VOCs according to any one of claims 1 to 8, comprising the steps of:
(1) dispersing the porous material loaded with the nano particles into a solvent to obtain a dispersion liquid;
(2) spraying the dispersion liquid on the preliminarily glazed ceramic tile, drying, spraying glaze, roasting, and cooling to obtain the ceramic tile for purifying VOCs.
10. The method as claimed in claim 9, wherein the drying temperature in step (2) is 90-300 ℃, the drying time is 2-30min, the baking temperature is 650-1200 ℃, and the baking time is 5-30 min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116375449A (en) * | 2023-05-29 | 2023-07-04 | 佛山市和昇昌生物科技有限公司 | Formaldehyde-removing ceramic tile and preparation method thereof |
| CN117025088A (en) * | 2023-08-08 | 2023-11-10 | 株洲宜安精密制造有限公司 | Corrosion-resistant magnesium alloy and preparation method and application thereof |
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| CN112010674A (en) * | 2020-10-26 | 2020-12-01 | 佛山市东鹏陶瓷发展有限公司 | Anion ceramic tile with photocatalysis function and preparation process thereof |
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| CN117025088A (en) * | 2023-08-08 | 2023-11-10 | 株洲宜安精密制造有限公司 | Corrosion-resistant magnesium alloy and preparation method and application thereof |
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