CN109012756A - A kind of catalysis material and preparation method thereof with high stability - Google Patents
A kind of catalysis material and preparation method thereof with high stability Download PDFInfo
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- CN109012756A CN109012756A CN201811084468.8A CN201811084468A CN109012756A CN 109012756 A CN109012756 A CN 109012756A CN 201811084468 A CN201811084468 A CN 201811084468A CN 109012756 A CN109012756 A CN 109012756A
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- 239000000463 material Substances 0.000 title claims abstract description 46
- 238000006555 catalytic reaction Methods 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims description 12
- 239000012790 adhesive layer Substances 0.000 claims abstract description 27
- 239000010410 layer Substances 0.000 claims abstract description 21
- 239000011941 photocatalyst Substances 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- 239000011230 binding agent Substances 0.000 claims description 16
- 238000003892 spreading Methods 0.000 claims description 15
- 230000007480 spreading Effects 0.000 claims description 15
- 239000003292 glue Substances 0.000 claims description 9
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 229910052582 BN Inorganic materials 0.000 claims description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 2
- 229910052797 bismuth Inorganic materials 0.000 claims description 2
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 2
- DKUYEPUUXLQPPX-UHFFFAOYSA-N dibismuth;molybdenum;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Mo].[Mo].[Bi+3].[Bi+3] DKUYEPUUXLQPPX-UHFFFAOYSA-N 0.000 claims description 2
- 229920006335 epoxy glue Polymers 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 238000007654 immersion Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 2
- 239000011787 zinc oxide Substances 0.000 claims description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims 1
- 229910052710 silicon Inorganic materials 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- 229910052814 silicon oxide Inorganic materials 0.000 claims 1
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 claims 1
- 230000001699 photocatalysis Effects 0.000 abstract description 21
- 239000003054 catalyst Substances 0.000 abstract description 17
- 238000007146 photocatalysis Methods 0.000 abstract description 15
- 230000003197 catalytic effect Effects 0.000 abstract description 12
- 230000008901 benefit Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 3
- -1 carrier Substances 0.000 abstract description 3
- 238000005286 illumination Methods 0.000 abstract description 3
- 239000006004 Quartz sand Substances 0.000 description 13
- 239000004411 aluminium Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- SHPBBNULESVQRH-UHFFFAOYSA-N [O-2].[O-2].[Ti+4].[Zr+4] Chemical compound [O-2].[O-2].[Ti+4].[Zr+4] SHPBBNULESVQRH-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- 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
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/36—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of vanadium, niobium or tantalum
-
- B01J35/39—
Abstract
The invention discloses a kind of catalysis materials with high stability, are made of multilayer material, including carrier, adhesive layer, transparent grain layer and catalyst layer.It is bonded on carrier using transparent grain, forms light transmission and stable rough surface, and photocatalysis layer and adhesive layer are isolated.The transparent grain layer considerably increases the surface area of carrier, and increases the binding force with photocatalyst layer, keeps illumination more uniform, and the stability of film is greatly strengthened while keeping photocatalysis layer high activity.This method has the advantages that product structure is simple, at low cost, stability is high, high catalytic efficiency, is common to the light catalytic purifying of volatile gas.
Description
Technical field
The present invention relates to a kind of catalysis materials with high stability, further relate to the above-mentioned photocatalysis with high stability
The preparation method of material belongs to the technical field of environment-friendly materials preparation.
Background technique
Photocatalysis technology is in the neck such as environment (purification air eliminates chemical pollutant) and the energy (photocatalytic hydrogen production by water decomposition)
Domain presents wide application value and tempting application prospect.Various catalysis materials and photocatalytic product have started to be in
It is applied well in the places such as front yard, industry.On waste gas purification, low energy consumption for photocatalysis technology, decomposition product is water and dioxy
Change carbon, without secondary pollution, especially there is biggish competitive advantage.But in practical applications, the load, photocatalysis of photochemical catalyst
Photochemical catalyst exploitation responded in active raising and visible-range etc. is to hinder catalysis material and photocatalytic product big
The bottleneck of sizable application.
At present in the photocatalysis technology of waste gas purification, photochemical catalyst usually requires the method being supported on certain carrier,
Carrier provides the mechanical support of photochemical catalyst, overcomes the catalyst difficulty recycling of suspension photocatalytic method, loses big disadvantage, but
There is higher requirement with joint efforts between the exposing area, carrier and catalyst on surface to photochemical catalyst, to material in ultraviolet wire loop
Safety, durability under border also have strict demand.Usual porous nanostructure has the advantages that surface area is big, but its structure
More loose, loosely, catalyst powder is easy to fall off binding force；Therefore from practical angle, the prior art is mainly used in light
Increase binder in catalyst, to increase the binding force with carrier, but binder is filled with the gap between nano-photocatalyst, from
And there are surface area is smaller, the insufficient disadvantage of activity.And complex carrier, such as patent 201010548541.X is being used to use
For carbon fiber as carrier, 200510095107.X is super using polytetrafluoroethylene (PTFE) using dispersion fiber, patent 201710297904.9
Fine fibre is as carrier, other such as zeolite, active carbon, porous foam metals, although surface area can be increased to a certain degree,
Since material is opaque, only surface could be generated photocatalysis by the part of illumination, and there are opaque, light utilization efficiency is low
The shortcomings that.When using organic carrier and organic binder, photocatalysis can greatly increase organic binder or
The decomposition rate of organic carrier material, the gas not only discharged can become pollution sources, and organic carrier and binder also can be in light
It is gradually decomposed under catalytic action.Therefore, it in view of the above deficiency, develops a kind of increase nano-photo catalytic membrane stability, be able to maintain again
The method of nano-photo catalytic high catalytic activity is necessary.
Summary of the invention
For the deficiency of above situation, the technical problems to be solved by the invention are to provide a kind of light with high stability and urge
Change material, the catalysis material was not only with good stability, but also was able to maintain its high catalytic activity.
The present invention also technical problems to be solved are to provide the preparation method of the above-mentioned catalysis material with high stability.
In order to solve the above technical problems, the technical scheme adopted by the invention is as follows:
A kind of catalysis material with high stability, including carrier, are fixed with adhesive layer on the carrier, on adhesive layer
Spreading has transparent powder, and nano-photocatalyst is pasted on the adhesive layer that spreading has transparent powder.
Transparent powder is bonded on adhesive layer, so that adhesive layer is formed rough surface, is urged so that adhesive layer be isolated with nanometer light
Agent.
Wherein, the transparent powder is SiO 2 powder, aluminum oxide powder, boron nitride powder, titanium dioxide zirconium powder
The mixing of one or more of last or glass powder.
Wherein, the partial size of the transparent powder is 50~800 mesh.
Wherein, the adhesive layer is the mixed of one or more of silica gel, silica solution, acrylate glue, epoxy glue or UV glue
It closes.
Wherein, the nano-photocatalyst is zinc oxide, titanium dioxide, carbonitride, pucherite, iron oxide, tungsten oxide, tungsten
One or more of sour bismuth or bismuth molybdate.
The preparation method of the above-mentioned catalysis material with high stability, includes the following steps:
Step 1, binder is smeared in carrier surface, obtains the support carrier with adhesive layer；
Step 2, by transparent powder spreading on the carrier with adhesive layer, sufficiently support carrier is erect or is turned over after covering
Turn, the transparent powder not being firmly bonded is fallen；
Step 3, there is the tie layer surface of transparent powder to spray nano-photocatalyst in spreading, be dried after spraying
Catalysis material can be obtained.
The preparation method of the above-mentioned catalysis material with high stability, includes the following steps:
Step 1, binder is smeared in carrier surface, obtains the carrier with adhesive layer；
Step 2, by transparent powder spreading on the carrier with adhesive layer, sufficiently carrier is erect or is overturn after covering,
The transparent powder not being firmly bonded is fallen；
Step 3, there is the carrier of transparent powder to be placed in silica solution spreading to be soaked for a period of time, to further enhance viscous
Tie the isolation effect of layer and nano-photocatalyst；
Step 4, nano-photocatalyst is sprayed on the tie layer surface that spreading has transparent powder after immersion, is carried out after spraying
Catalysis material can be obtained in drying process.
Application of the above-mentioned catalysis material with high stability in terms of purifying volatile chemical organic vapor.
The principle of present invention enhancing catalysis material stability: if the nano-photocatalyst used under normal conditions does not increase
Adding additives (direct nano-photocatalyst is placed on carrier), porosity is higher, but binding force is very weak, is easy to take off on carrier
It falls；And when increasing binder, binder can fill the interparticle gap of nano-photocatalyst, and organic binder can also be in light
It is decomposed under catalytic action.In the present invention, using the contour transparent powder of quartz sand, adhesive layer and photochemical catalyst are isolated, nanometer light
When catalyst is sprayed at quartz sand surface, the coarse surface of quartz sand not only greatly expands the surface area of photochemical catalyst, also greatly
The binding force of photochemical catalyst and substrate, the not only light transmission of the transparent characteristic of quartz sand are enhanced greatly, but also has reflection and refraction to light
Effect, the light for making to impinge upon on photochemical catalyst are more uniform.
The utility model has the advantages that catalysis material produced by the present invention, has catalytic performance good, stability is high, and photocatalysis coating is not
Caducous advantage, the photocatalysis performance that catalysis material of the catalysis material of quartz sand than not adding quartz sand is added improve
50% or more, and the photocatalysis performance of material is not also decayed significantly after slight washing；Preparation process is simple simultaneously.
Detailed description of the invention
Fig. 1 is the cross-sectional view that the present invention has high stability catalysis material.
Specific embodiment
Below in conjunction with attached drawing, technical scheme is described further, but the scope of protection of present invention is simultaneously
It is not limited to this.
As shown in Figure 1, the present invention has the catalysis material of high stability, including carrier 1, bonding is fixed on carrier 1
Layer 2,2 upper berth of adhesive layer are sprinkled with transparent powder 3, and nano-photocatalyst 4 is pasted on the adhesive layer 2 that spreading has transparent powder 3.Thoroughly
Bright powder 3 (size of transparent powder is 50~800 mesh) is bonded on adhesive layer 2, and adhesive layer 2 is made to form rough surface, thus
Adhesive layer 2 and nano-photocatalyst 4 is isolated, gap between photochemical catalyst can be filled by effectively having prevented binder, lead to photocatalysis
Agent surface area becomes smaller, the problem of photocatalytic activity deficiency.
The present invention has the preparation method of the catalysis material of high stability, includes the following steps:
Step 1, one layer of UV solidification glue is smeared in aluminium net carrier surface, is brushed flat using brush, obtain solidifying with a thin layer
The support carrier of glue；
Step 2,200 mesh quartz sands are sprinkled upon on the aluminium net carrier with binder, quartz sand is sufficiently covered on binder
Support aluminium net is turned after upper, so that the quartz sand not being firmly bonded be made to fall；
Step 3, the aluminium net carrier that UV solidification glue and quartz sand are had using low-pressure mercury light source irradiation, promotes UV adhesive curing
Quartz sand is sticked on aluminium net carrier；
Step 4, after aluminium net carrier being impregnated one minute in the alkaline silica sol that mass percentage concentration is 2%, taking-up is blown
Ten；
Step 5, nano-photocatalyst (nanometer pucherite) is sprayed on the UV solidification glue surface that spreading has quartz sand, sprayed
After be dried catalysis material can be obtained.
Catalysis material produced by the present invention has the advantages that surface area is big, catalytic performance is good, washable.In photocatalytic
On energy, the catalysis material of quartz sand is added than the catalysis material of quartz sand not being added (directly photochemical catalyst to be sprayed at
On binder) catalytic performance improve 50% or more.
Catalysis material of the invention, is made of multilayer material, including carrier 1, adhesive layer 2, transparent grain layer 3 and light are urged
Agent layer 4 is bonded on carrier 1 using transparent grain 3, forms light transmission and stable rough surface, and by photocatalysis layer 4 and is glued
It ties layer 2 to be isolated, which considerably increases the surface area of carrier 1, and increases the knot of carrier 1 Yu photocatalyst layer 4
With joint efforts, keep illumination more uniform, (in conjunction with) of catalysis material is greatly strengthened while keeping 4 high activity of photocatalyst layer
Stability.Catalysis material produced by the present invention is with product structure is simple, preparation cost is low, stability is high, photocatalysis efficiency
High advantage is common to the light catalytic purifying of volatile gas.
Claims (8)
1. a kind of catalysis material with high stability, it is characterised in that: including carrier, bonding is fixed on the carrier
Layer, adhesive layer upper berth are sprinkled with transparent powder, and nano-photocatalyst is pasted on the adhesive layer that spreading has transparent powder.
2. the catalysis material according to claim 1 with high stability, it is characterised in that: the transparent powder is two
One or more of silicon oxide powder, aluminum oxide powder, boron nitride powder, Zirconium dioxide powder or glass powder mix
It closes.
3. the catalysis material according to claim 2 with high stability, it is characterised in that: the grain of the transparent powder
Diameter is 50~800 mesh.
4. the catalysis material according to claim 1 with high stability, it is characterised in that: the adhesive layer is silicon
The mixing of one or more of glue, silica solution, acrylate glue, epoxy glue or UV glue.
5. the catalysis material according to claim 1 with high stability, it is characterised in that: the nano-photocatalyst
For one or more of zinc oxide, titanium dioxide, carbonitride, pucherite, iron oxide, tungsten oxide, bismuth tungstate or bismuth molybdate.
6. the preparation method of the catalysis material described in claim 1 with high stability, which is characterized in that including walking as follows
It is rapid:
Step 1, binder is smeared in carrier surface, obtains the support carrier with adhesive layer；
Step 2, by transparent powder spreading on the carrier with adhesive layer, support carrier is erect or is overturn after abundant covering,
The transparent powder not bonded is fallen；
Step 3, there is the tie layer surface of transparent powder to spray nano-photocatalyst in spreading, be dried after spraying
Obtain catalysis material.
7. the preparation method of the catalysis material described in claim 1 with high stability, which is characterized in that including walking as follows
It is rapid:
Step 1, binder is smeared in carrier surface, obtains the carrier with adhesive layer；
Step 2, by transparent powder spreading with adhesive layer carrier on, sufficiently covering after by carrier erect or overturn, not by
The transparent powder of bonding is fallen；
Step 3, there is the carrier of transparent powder to be placed in silica solution spreading to be soaked for a period of time；
Step 4, nano-photocatalyst is sprayed on the tie layer surface that spreading has transparent powder after immersion, is dried after spraying
Catalysis material can be obtained in processing.
8. the catalysis material described in claim 1 with high stability is in terms of purifying volatile chemical organic vapor
Using.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110237679A (en) * | 2019-05-28 | 2019-09-17 | 浙江大学 | Aldehyde device is removed with light-catalysed based on porous absorption |
| CN110452021A (en) * | 2019-07-11 | 2019-11-15 | 河海大学 | A kind of particle mosaic type photocatalysis dirty furring brick and preparation method and preparation facilities only |
| CN111978762A (en) * | 2020-09-01 | 2020-11-24 | 福州大学 | Carbon nitride photocatalytic coating suitable for building material surface visible light response and preparation method thereof |
| CN112356176A (en) * | 2020-11-05 | 2021-02-12 | 南京国豪环保材料科技有限公司 | Plywood with formaldehyde room-temperature catalytic decomposition function and preparation method thereof |
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| CN110452021A (en) * | 2019-07-11 | 2019-11-15 | 河海大学 | A kind of particle mosaic type photocatalysis dirty furring brick and preparation method and preparation facilities only |
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