CN103980759A - Preparation method of adsorption-photocatalysis compound type formaldehyde removing coating - Google Patents
Preparation method of adsorption-photocatalysis compound type formaldehyde removing coating Download PDFInfo
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- CN103980759A CN103980759A CN201410228021.9A CN201410228021A CN103980759A CN 103980759 A CN103980759 A CN 103980759A CN 201410228021 A CN201410228021 A CN 201410228021A CN 103980759 A CN103980759 A CN 103980759A
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Abstract
The invention relates to a preparation method of an adsorption-photocatalysis compound type formaldehyde removing coating, relating to a preparation method of a coating and aiming at solving the problems of low formaldehyde degradation efficiency and incapability of enriching formaldehyde in an existing photocatalysis coating. The preparation method disclosed by the invention comprises the following steps: (1), preparing ACF (Active Carbon Fiber) modified by concentrated nitric acid; (2), mixing butyl titanate, ethanol and acetic acid; (3), mixing ethanol, acetic acid and water, adding urea and iron nitrate nonahydrate crystals, and adjusting pH; (4), preparing TiO2 sol containing iron and nitrogen; (5), preparing ACF loaded with TiO2; (6), preparing TiO2/ACF compound powder; and (7), mixing the TiO2/ACF compound powder with the coating. By means of the enrichment action of ACF, the problem of low TiO2 efficiency is solved to a great extent; by means of the catalytic action of TiO2, the saturated regeneration problem of an adsorbent is effectively solved; the characteristics of the ACF and the TiO2 are complementary; the formaldehyde degradation efficiency is greatly improved. The preparation method disclosed by the invention can be used for preparing the adsorption-photocatalysis compound type formaldehyde removing coating.
Description
Technical field
The present invention relates to the preparation method of coating.
Background technology
Formaldehyde, as a kind of important organic raw material, is widely used in Industrial products such as manufacturing resin, rubber, plastics, is present in material of construction in a large number.Also be present in all kinds of finishing material as in adherent cloth, wallpaper, chemical fibre carpet, porous plastics, paint, coating and some textiless.But meanwhile, formaldehyde is a kind of gas human body to Study on Acute Toxic Effects, and its harm to human body has chronicity, latent and concealed feature.And city is due to reasons such as tropical island effect, inversion weather, become especially the clustering area of formaldehyde gas.
In air, the purification techniques of formaldehyde pollution is summed up and mainly contains: absorption method and oxidation style etc.Absorption method be mainly utilize cellular solid by airborne formaldehyde absorbing on its surface, to reach the object of removal, once but adsorb saturatedly, need manipulation of regeneration, technical sophistication and cost are high.Catalysis method mainly contains plasma body-catalyzed oxidation technology, photocatalysis oxidation technique, heterogeneous catalytic oxidation technology etc.Catalysis method has advantages of non-secondary pollution, but efficiency is still subject to the conditionalities such as catalyst activity, life-span, environment.How to develop a kind of efficient, energy-conservation, pollution-free, Degradation Formaldehyde technology that cost is low, become the direction that numerous scholars are exploring.
Summary of the invention
The present invention will solve existing light catalyzed coating and exist degradation of formaldehyde efficiency low, cannot PARA FORMALDEHYDE PRILLS(91,95) carry out the problem of inrichment, and the preparation method of a kind of absorption-photochemical catalysis combined type except the coating of formaldehyde is provided.
Absorption-photochemical catalysis combined type, except a preparation method for the coating of formaldehyde, is specifically carried out according to following steps:
One, by activated carbon fiber deionized water wash, controlling temperature is 80 ℃～120 ℃ again, dry 2h, Air drying 24h then, then put into concentrated nitric acid, at ambient temperature, keep 2h, then use deionized water drip washing to washing lotion pH=7, then at room temperature in air, keep 24h, dry, make the ACF of concentrated nitric acid modification;
Two, under agitation condition, butyl (tetra) titanate is joined in dehydrated alcohol and Glacial acetic acid mixing solutions, obtain A liquid, the volume ratio of butyl (tetra) titanate and dehydrated alcohol and Glacial acetic acid mixing solutions is 1: 4.5～5.5, and in dehydrated alcohol and Glacial acetic acid mixing solutions, the volume ratio of dehydrated alcohol and Glacial acetic acid is 5～8: 1;
Three, by dehydrated alcohol, Glacial acetic acid and water, according to volume ratio, be to mix at 6: 10: 1 to obtain dehydrated alcohol-glacial acetic acid solution, add again urea and Fe(NO3)39H2O crystal, mix, then with nitre acid for adjusting pH, be 2～3, obtain B liquid, wherein the mass volume ratio of urea and dehydrated alcohol-glacial acetic acid solution is 0.8g～1.2g: 25.5mL, and the mass volume ratio of Fe(NO3)39H2O crystal and dehydrated alcohol-glacial acetic acid solution is 0.3g～0.6g: 25.5mL;
Four,, under agitation condition, the B liquid that step 3 is obtained adds in the A liquid that step 2 obtains, continue to stir 1h～2h, more standing more than 1 day, obtain the TiO of iron content, nitrogen
2colloidal sol, wherein, A liquid and B liquid volume ratio are 4.5～5.5: 1;
The ACF of the concentrated nitric acid modification five, step 1 being made joins the TiO that step 4 obtains
2in colloidal sol, mix and blend 1h, the TiO of employing suction method excessive separation
2colloidal sol, obtains load TiO
2aCF, wherein, the ACF of concentrated nitric acid modification and TiO
2the mass volume ratio of colloidal sol is 5g～10g: 40mL;
Six, load TiO step 5 being made
2aCF in temperature, be under 80 ℃～120 ℃ conditions, dry 6h～10h, then grind, then controlling temperature is 400 ℃～550 ℃ roasting 3h, obtains TiO
2/ ACF composite granule;
Seven, the TiO being prepared by step 6
2/ ACF composite granule mixes with powder coating, obtains a kind of absorption-photochemical catalysis combined type except the coating of formaldehyde, wherein, and TiO
2the mass ratio of/ACF composite granule and powder coating is 4%～20%.
The invention has the beneficial effects as follows: the present invention has carried out rational combination to traditional absorption degradation method and photocatalytic degradation method, make material there is absorption-photochemical catalysis compound ability.When night, temperature was lower, sorbent material to hole, has inrichment by the formaldehyde absorbing of trace in air, and photocatalyst nano-TiO after modification
2be carried on adsorbent surface, on daytime, be CO by the Degradation Formaldehyde of enrichment under the effect of light
2and H
2o.The inrichment of sorbent material (ACF) has solved TiO to a great extent
2inefficient problem, and TiO
2katalysis efficiently solve again the saturated regeneration problem that needs of sorbent material, both features are carried out complementation, have increased substantially the efficiency of degradation of formaldehyde.
With sol-gel method, make TiO
2/ ACF composite granule, realize the compound of photo-catalysis function and adsorption function, both retained the features such as sorbent material is simple with reacting of photocatalyst, instant effect, non-secondary pollution, solved again that adsorbent capacity is limited, the life-span is short, needed regeneration and photocatalyst physical structure poor performance, cannot enrichment pollutent etc. shortcoming.
TiO that can efficient degradation formaldehyde
2/ ACF composite granule combines with coating, is sprayed at external wall, makes full use of the problems such as the abundant exterior wall surface in city is long-pending has solved formaldehyde gas source of pollution wide as reactive group, and diffusion is complicated.
Utilize and realize PARA FORMALDEHYDE PRILLS(91,95) cryogenic absorption night, daytime is by pollutent catalysis and carry out desorption, has effectively utilized natural temperature differential.Again to be reacted by Driven by Solar Energy, clean environment firendly, energy derive is extensive and long-term.
The present invention is with regard to TiO
2the shortcoming that degree is low of utilizing to sunlight has proposed to utilize the nitrogen co-doped means of iron to TiO
2carry out modification, and doping process is combined with collosol and gel load method, increasing substantially TiO
2photoresponse scope time preparation process simpler.
The present invention takes full advantage of natural temperature differential, and coating was adsorbed at night, daytime desorption carry out photocatalytic degradation, mimic photosynthesis effect, has invented a kind of " coating that can breathe ".
The present invention is the coating except formaldehyde for the preparation of absorption-photochemical catalysis combined type.
Accompanying drawing explanation
Fig. 1 is the time changing curve figure of concentration of formaldehyde, and wherein curve 1 is contrast experiment three, and curve 2 is contrast experiment two, and curve 3 is contrast experiment one, and curve 4 is embodiment mono-.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: a kind of absorption-photochemical catalysis of present embodiment combined type, except the preparation method of the coating of formaldehyde, is specifically carried out according to following steps:
One, by activated carbon fiber deionized water wash, controlling temperature is 80 ℃～120 ℃ again, dry 2h, Air drying 24h then, then put into concentrated nitric acid, at ambient temperature, keep 2h, then use deionized water drip washing to washing lotion pH=7, then at room temperature in air, keep 24h, dry, make the ACF of concentrated nitric acid modification;
Two, under agitation condition, butyl (tetra) titanate is joined in dehydrated alcohol and Glacial acetic acid mixing solutions, obtain A liquid, the volume ratio of butyl (tetra) titanate and dehydrated alcohol and Glacial acetic acid mixing solutions is 1: 4.5～5.5, and in dehydrated alcohol and Glacial acetic acid mixing solutions, the volume ratio of dehydrated alcohol and Glacial acetic acid is 5～8: 1;
Three, by dehydrated alcohol, Glacial acetic acid and water, according to volume ratio, be to mix at 6: 10: 1 to obtain dehydrated alcohol-glacial acetic acid solution, add again urea and Fe(NO3)39H2O crystal, mix, then with nitre acid for adjusting pH, be 2～3, obtain B liquid, wherein the mass volume ratio of urea and dehydrated alcohol-glacial acetic acid solution is 0.8g～1.2g: 25.5mL, and the mass volume ratio of Fe(NO3)39H2O crystal and dehydrated alcohol-glacial acetic acid solution is 0.3g～0.6g: 25.5mL;
Four,, under agitation condition, the B liquid that step 3 is obtained adds in the A liquid that step 2 obtains, continue to stir 1h～2h, more standing more than 1 day, obtain the TiO of iron content, nitrogen
2colloidal sol, wherein, A liquid and B liquid volume ratio are 4.5～5.5: 1;
The ACF of the concentrated nitric acid modification five, step 1 being made joins the TiO that step 4 obtains
2in colloidal sol, mix and blend 1h, the TiO of employing suction method excessive separation
2colloidal sol, obtains load TiO
2aCF, wherein, the ACF of concentrated nitric acid modification and TiO
2the mass volume ratio of colloidal sol is 5g～10g: 40mL;
Six, load TiO step 5 being made
2aCF in temperature, be under 80 ℃～120 ℃ conditions, dry 6h～10h, then grind, then controlling temperature is 400 ℃～550 ℃ roasting 3h, obtains TiO
2/ ACF composite granule;
Seven, the TiO being prepared by step 6
2/ ACF composite granule mixes with powder coating, obtains a kind of absorption-photochemical catalysis combined type except the coating of formaldehyde, wherein, and TiO
2the mass ratio of/ACF composite granule and powder coating is 4%～20%.
Embodiment two: present embodiment is different from embodiment one: in step 1, the mass concentration of concentrated nitric acid is 65%.Other is identical with embodiment one.
Embodiment three: present embodiment is different from embodiment one: in step 2, the volume ratio of butyl (tetra) titanate and dehydrated alcohol and Glacial acetic acid mixing solutions is 1: 5.Other is identical with embodiment one.
Embodiment four: present embodiment is different from embodiment one: in step 2, in dehydrated alcohol and Glacial acetic acid mixing solutions, the volume ratio of dehydrated alcohol and Glacial acetic acid is 6: 1.Other is identical with embodiment one.
Embodiment five: present embodiment is different from embodiment one: in step 4, A liquid and B liquid volume ratio are 5: 1.Other is identical with embodiment one.
Embodiment six: present embodiment is different from embodiment one: controlling temperature in step 6 is 450 ℃ of roastings.Other is identical with embodiment one.
Embodiment seven: present embodiment is different from embodiment one: TiO in step 7
2the mass ratio of/ACF composite granule and powder coating is 5%.Other is identical with embodiment one.
Embodiment eight: present embodiment is different from embodiment one: in step 7, powder coating is acrylic powder coating.Other is identical with embodiment one.
Adopt following examples and contrast experiment to verify beneficial effect of the present invention:
Embodiment mono-:
A kind of absorption-photochemical catalysis of the present embodiment combined type, except the preparation method of the coating of formaldehyde, is specifically carried out according to following steps:
One, by activated carbon fiber deionized water wash, controlling temperature is 100 ℃ again, dry 2h, Air drying 24h then, then put into concentrated nitric acid, at ambient temperature, keep 2h, then use deionized water drip washing to washing lotion pH=7, then at room temperature in air, keep 24h, dry, make the ACF of concentrated nitric acid modification;
Two, under agitation condition, butyl (tetra) titanate is joined in dehydrated alcohol and Glacial acetic acid mixing solutions, obtain A liquid, the volume ratio of butyl (tetra) titanate and dehydrated alcohol and Glacial acetic acid mixing solutions is 1: 5, and in dehydrated alcohol and Glacial acetic acid mixing solutions, the volume ratio of dehydrated alcohol and Glacial acetic acid is 5.5: 1;
Three, by dehydrated alcohol, Glacial acetic acid and water, according to volume ratio, be to mix at 6: 10: 1 to obtain dehydrated alcohol-glacial acetic acid solution, add again urea and Fe(NO3)39H2O crystal, mix, then with nitre acid for adjusting pH, be 2～3, obtain B liquid, wherein the mass volume ratio of urea and dehydrated alcohol-glacial acetic acid solution is 1.2g: 25.5mL, and the mass volume ratio of Fe(NO3)39H2O crystal and dehydrated alcohol-glacial acetic acid solution is 0.6g: 25.5mL;
Four,, under agitation condition, the B liquid that step 3 is obtained adds in the A liquid that step 2 obtains, continue to stir 1h, more standing more than 1 day, obtain the TiO of iron content, nitrogen
2colloidal sol, wherein, A liquid and B liquid volume ratio are 5: 1;
The ACF of the concentrated nitric acid modification five, step 1 being made joins the TiO that step 4 obtains
2in colloidal sol, mix and blend 1h, the TiO of employing suction method excessive separation
2colloidal sol, obtains load TiO
2aCF, wherein, the ACF of concentrated nitric acid modification and TiO
2the mass volume ratio of colloidal sol is 5g: 40mL;
Six, load TiO step 5 being made
2aCF in temperature, be under 80 ℃ of conditions, dry 8h, then grind, then controlling temperature is 450 ℃ of roasting 3h, obtains TiO
2/ ACF composite granule;
Seven, the TiO being prepared by step 6
2/ ACF composite granule mixes with powder coating, obtains a kind of absorption-photochemical catalysis combined type except the coating of formaldehyde, wherein, and TiO
2the mass ratio of/ACF composite granule and powder coating is 5%.
In the present embodiment, in step 7, powder coating is acrylic powder coating.
Contrast experiment one:
This contrast experiment modification TiO
2the preparation method of coating, specifically carries out according to following steps:
One, under agitation condition, butyl (tetra) titanate is joined in dehydrated alcohol and Glacial acetic acid mixing solutions, obtain A liquid, the volume ratio of butyl (tetra) titanate and dehydrated alcohol and Glacial acetic acid mixing solutions is 1: 5, and in dehydrated alcohol and Glacial acetic acid mixing solutions, the volume ratio of dehydrated alcohol and Glacial acetic acid is 5.5: 1;
Two, by dehydrated alcohol, Glacial acetic acid and water, according to volume ratio, be to mix at 6: 10: 1 to obtain dehydrated alcohol-glacial acetic acid solution, add again urea and Fe(NO3)39H2O crystal, mix, then with nitre acid for adjusting pH, be 2～3, obtain B liquid, wherein the mass volume ratio of urea and dehydrated alcohol-glacial acetic acid solution is 1.2g: 25.5mL, and the mass volume ratio of Fe(NO3)39H2O crystal and dehydrated alcohol-glacial acetic acid solution is 0.6g: 25.5mL;
Three,, under agitation condition, the B liquid that step 2 is obtained adds in the A liquid that step 1 obtains, continue to stir 1h, more standing more than 1 day, obtain the TiO of iron content, nitrogen
2colloidal sol, wherein, A liquid and B liquid volume ratio are 5: 1;
Four, TiO step 3 being obtained
2colloidal sol is under 80 ℃ of conditions in temperature, dry 8h, then grind, then controlling temperature is 450 ℃ of roasting 3h, obtains nano titanium dioxide powder, then nano titanium dioxide powder is mixed with powder coating, obtains modification TiO
2coating.
In this contrast experiment, in step 4, powder coating is acrylic powder coating, and the mass ratio of nano titanium dioxide powder and powder coating is 5%.
Contrast experiment two:
The preparation method of this contrast experiment modified ACFs coating, specifically carries out according to following steps:
By activated carbon fiber deionized water wash, controlling temperature is 100 ℃ again, dry 2h, Air drying 24h then, then put into concentrated nitric acid, at ambient temperature, keep 2h, then use deionized water drip washing to washing lotion pH=7, then at room temperature in air, keep 24h, dry, make the ACF of concentrated nitric acid modification; Again the ACF of concentrated nitric acid modification is mixed with powder coating, obtain modified ACFs coating.
In this contrast experiment, powder coating is acrylic powder coating, the ACF of concentrated nitric acid modification and the mass ratio of powder coating 5%.
Contrast experiment three:
This contrast experiment three adopts acrylic powder coating.
Adopt methylene oxide detecting instrument to carry out Real-Time Monitoring to the coating of contrast experiment one to three and embodiment mono-preparation, draw the time changing curve figure of concentration of formaldehyde as shown in Figure 1, wherein curve 1 is contrast experiment three, curve 2 is contrast experiment two, curve 3 is contrast experiment one, curve 4 is embodiment mono-, through experiment test, has confirmed that the present invention has the effect of good degradation of formaldehyde really.
Experimental result shows, absorption-photochemical catalysis combined type can reach 64.9% except the coating of formaldehyde high degradation rate under the irradiation of simulated solar light source, higher than TiO
2light catalyzed coating and only add coating and the traditional coating of ACF.
Claims (8)
1. absorption-photochemical catalysis combined type is except a preparation method for the coating of formaldehyde, it is characterized in that specifically according to following steps, carrying out:
One, by activated carbon fiber deionized water wash, controlling temperature is 80 ℃～120 ℃ again, dry 2h, Air drying 24h then, then put into concentrated nitric acid, at ambient temperature, keep 2h, then use deionized water drip washing to washing lotion pH=7, then at room temperature in air, keep 24h, dry, make the ACF of concentrated nitric acid modification;
Two, under agitation condition, butyl (tetra) titanate is joined in dehydrated alcohol and Glacial acetic acid mixing solutions, obtain A liquid, the volume ratio of butyl (tetra) titanate and dehydrated alcohol and Glacial acetic acid mixing solutions is 1: 4.5～5.5, and in dehydrated alcohol and Glacial acetic acid mixing solutions, the volume ratio of dehydrated alcohol and Glacial acetic acid is 5～8: 1;
Three, by dehydrated alcohol, Glacial acetic acid and water, according to volume ratio, be to mix at 6: 10: 1 to obtain dehydrated alcohol-glacial acetic acid solution, add again urea and Fe(NO3)39H2O crystal, mix, then with nitre acid for adjusting pH, be 2～3, obtain B liquid, wherein the mass volume ratio of urea and dehydrated alcohol-glacial acetic acid solution is 0.8g～1.2g: 25.5mL, and the mass volume ratio of Fe(NO3)39H2O crystal and dehydrated alcohol-glacial acetic acid solution is 0.3g～0.6g: 25.5mL;
Four,, under agitation condition, the B liquid that step 3 is obtained adds in the A liquid that step 2 obtains, continue to stir 1h～2h, more standing more than 1 day, obtain the TiO of iron content, nitrogen
2colloidal sol, wherein, A liquid and B liquid volume ratio are 4.5～5.5: 1;
The ACF of the concentrated nitric acid modification five, step 1 being made joins the TiO that step 4 obtains
2in colloidal sol, mix and blend 1h, the TiO of employing suction method excessive separation
2colloidal sol, obtains load TiO
2aCF, wherein, the ACF of concentrated nitric acid modification and TiO
2the mass volume ratio of colloidal sol is 5g～10g: 40mL;
Six, load TiO step 5 being made
2aCF in temperature, be under 80 ℃～120 ℃ conditions, dry 6h～10h, then grind, then controlling temperature is 400 ℃～550 ℃ roasting 3h, obtains TiO
2/ ACF composite granule;
Seven, the TiO being prepared by step 6
2/ ACF composite granule mixes with powder coating, obtains a kind of absorption-photochemical catalysis combined type except the coating of formaldehyde, wherein, and TiO
2the mass ratio of/ACF composite granule and powder coating is 4%～20%.
2. a kind of absorption-photochemical catalysis combined type according to claim 1 is except the coating of formaldehyde, and the mass concentration that it is characterized in that concentrated nitric acid in step 1 is 65%.
3. a kind of absorption-photochemical catalysis combined type according to claim 1 is except the coating of formaldehyde, it is characterized in that in step 2, the volume ratio of butyl (tetra) titanate and dehydrated alcohol and Glacial acetic acid mixing solutions is 1: 5.
4. a kind of absorption-photochemical catalysis combined type according to claim 1 is except the coating of formaldehyde, it is characterized in that in step 2 that in dehydrated alcohol and Glacial acetic acid mixing solutions, the volume ratio of dehydrated alcohol and Glacial acetic acid is 6: 1.
5. a kind of absorption-photochemical catalysis combined type according to claim 1 is except the coating of formaldehyde, it is characterized in that in step 4 that A liquid and B liquid volume ratio are 5: 1.
6. a kind of absorption-photochemical catalysis combined type according to claim 1, except the coating of formaldehyde, is characterized in that in step 6, controlling temperature is 450 ℃ of roastings.
7. a kind of absorption-photochemical catalysis combined type according to claim 1, except the coating of formaldehyde, is characterized in that TiO in step 7
2the mass ratio of/ACF composite granule and powder coating is 5%.
8. a kind of absorption-photochemical catalysis combined type according to claim 1, except the coating of formaldehyde, is characterized in that in step 7, powder coating is acrylic powder coating.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105199523A (en) * | 2015-09-29 | 2015-12-30 | 江苏锦宇环境工程有限公司 | Method for preparing special automobile exhaust purification photocatalysis coating for tunnels |
| CN105482667A (en) * | 2015-11-27 | 2016-04-13 | 宁波双人新材料有限公司 | Formaldehyde removal solid powder coating and preparation method thereof |
| CN105879893A (en) * | 2014-12-24 | 2016-08-24 | 江南大学 | Preparation method of iron-nitrogen-codoped titanium dioxide visible-light-induced photocatalyst |
| CN108786727A (en) * | 2018-05-31 | 2018-11-13 | 安徽科浦环保科技有限公司 | A kind of preparation method for the composite activated carbon fibre except formaldehyde |
| CN110302820A (en) * | 2019-06-18 | 2019-10-08 | 宁波诺丁汉大学 | The preparation method of iron N doping catalyst for room temperature removal formaldehyde |
| CN111073440A (en) * | 2019-12-02 | 2020-04-28 | 骆瑜 | Architectural decorative coating capable of removing formaldehyde and preparation method thereof |
-
2014
- 2014-05-27 CN CN201410228021.9A patent/CN103980759A/en active Pending
Non-Patent Citations (1)
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| 李蓉: "负载型TiO2光催化降解典型气相有机污染物的研究", 《中国优秀硕士学位论文全文数据库》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105879893A (en) * | 2014-12-24 | 2016-08-24 | 江南大学 | Preparation method of iron-nitrogen-codoped titanium dioxide visible-light-induced photocatalyst |
| CN105199523A (en) * | 2015-09-29 | 2015-12-30 | 江苏锦宇环境工程有限公司 | Method for preparing special automobile exhaust purification photocatalysis coating for tunnels |
| CN105482667A (en) * | 2015-11-27 | 2016-04-13 | 宁波双人新材料有限公司 | Formaldehyde removal solid powder coating and preparation method thereof |
| CN108786727A (en) * | 2018-05-31 | 2018-11-13 | 安徽科浦环保科技有限公司 | A kind of preparation method for the composite activated carbon fibre except formaldehyde |
| CN110302820A (en) * | 2019-06-18 | 2019-10-08 | 宁波诺丁汉大学 | The preparation method of iron N doping catalyst for room temperature removal formaldehyde |
| CN111073440A (en) * | 2019-12-02 | 2020-04-28 | 骆瑜 | Architectural decorative coating capable of removing formaldehyde and preparation method thereof |
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Application publication date: 20140813 |