CN106902797A - The light floamed ceramic composite of area load photocatalytic activity layer - Google Patents
The light floamed ceramic composite of area load photocatalytic activity layer Download PDFInfo
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- CN106902797A CN106902797A CN201710212099.5A CN201710212099A CN106902797A CN 106902797 A CN106902797 A CN 106902797A CN 201710212099 A CN201710212099 A CN 201710212099A CN 106902797 A CN106902797 A CN 106902797A
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- light
- photocatalytic activity
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- area load
- floamed ceramic
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- 230000001699 photocatalysis Effects 0.000 title claims abstract description 29
- 239000000919 ceramic Substances 0.000 title claims abstract description 27
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000013033 photocatalytic degradation reaction Methods 0.000 claims description 7
- 238000003980 solgel method Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 238000007146 photocatalysis Methods 0.000 abstract description 6
- 229910021536 Zeolite Inorganic materials 0.000 abstract description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 4
- 239000010457 zeolite Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 13
- 230000015556 catabolic process Effects 0.000 description 8
- 238000006731 degradation reaction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 7
- 229940012189 methyl orange Drugs 0.000 description 7
- 238000002835 absorbance Methods 0.000 description 6
- 239000000975 dye Substances 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 229910010413 TiO 2 Inorganic materials 0.000 description 4
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 4
- 239000000499 gel Substances 0.000 description 4
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 238000004042 decolorization Methods 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 208000035126 Facies Diseases 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000008204 material by function Substances 0.000 description 2
- 238000007734 materials engineering Methods 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000011941 photocatalyst Substances 0.000 description 2
- 229920000767 polyaniline Polymers 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- STZCRXQWRGQSJD-UHFFFAOYSA-M sodium;4-[[4-(dimethylamino)phenyl]diazenyl]benzenesulfonate Chemical compound [Na+].C1=CC(N(C)C)=CC=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-UHFFFAOYSA-M 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 239000000017 hydrogel Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004530 micro-emulsion Substances 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000001782 photodegradation Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 239000002699 waste material 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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- B01J35/39—
-
- B01J35/56—
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
The present invention relates to a kind of light floamed ceramic composite of area load photocatalytic activity layer, its composition is in one layer of titanium dioxide active layer with photo-catalysis function of light floamed ceramic area load.Photocatalytic activity layer is carried on the porous carrier (light floamed ceramic) that surface is enriched and may float on the water surface, it is expected to obtain a kind of good composite of photocatalysis performance, the organic pollution in the water body that effectively can be degraded by light-catalysed mode.Porous carrier used is to use the light floamed ceramic for wanting raw material to prepare based on natural zeolite powder, by sol-gal process carried titanium dioxide active layer.
Description
Technical field：
The present invention relates to a kind of light floamed ceramic composite of area load photocatalytic activity layer, more particularly to one kind
Suitable for the light floamed ceramic composite of Organic Pollutants In Water photocatalytic degradation.
Background technology：
Dyestuff waste liquid must be effectively addressed, and the dyestuff contaminant for otherwise discharging can produce serious harm to environment
([1] Wang Kan, Chen Yingxu, leaf sweet smell rosy clouds .SiO2The TiO of load2Photocatalyst under Visible Light Irradiation dyestuff contaminant [J] is catalyzed
Journal, 2004,25 (12):931-936.).Titanium dioxide can be with catalytic degradation organic matter, it is expected to be applied to the drop of dye wastewater
Solution ([2] Zhang Weijin, He Yunqiu, Qi Qiang.Preparation of porous TiO2 filmof
photocatalyst by microemulsion templating[J].Journal of Functional Materials,
2005,10(36):1590-1593. [3] Zhang Ping, Mo Zunli, Zhang Chun, waits magnetic responsivenesses TiO2/ graphene nanocomposite material
Synthesis and photocatalysis performance [J] material engineering, 2015,43 (3):72-77.).Current nano-TiO2Application mainly have two
The form of kind：Suspension facies pattern and support type.Suspension facies pattern is the TiO to suspend2Powder carries out photocatalytic degradation, but this for catalyst
Easily cohesion loses activity in water to plant suspended substance, and the powder catalyst especially with after is not easily recycled, and causes secondary pollution
([4]Zhao Cui hua,Chen Jianhua,Shan Zhi qiang.An experimental study of effects
of different substrateson photocatalytic activity of loaded TiO 2thin films
[J].Industrial Water&Wastewater,2004,35(3):15-16.[5]Tian H,Ma J F,Li K,et
al.Hydrothermal synthesis of S-doped TiO2 nanoparticles and their
photocatalytic ability for degradation of methyl orange[J].Ceramics
International,2009,35(3):1289-1292.].Therefore, later photochemical catalytic oxidation emphasis is transferred to titanium dioxide
Immobilization technology and prepare in the research of film, i.e. supported catalyst oxidizing process ([6] H.Zhang, R.L.Zong, J.C.Zhao
and Y.F.Zhu.Dramatic visible photocatalytic degradation performances due to
synergetic effect of TiO2 with PANI[J].Environment Science&Technology,2008,42
(10):3803–3807.[7]Sun Zhi bo,Yin Yi dong,Fan Nai ying,et al.Study on
preparation of loaded TiO2 and its photocatalytic performances for NO2[J]
.Journal of Functional Materials,2014,45(S):99-103.].The carrier for being used have glass, titanium plate,
Glass fibre, zeolite, silica gel etc., the immobilization technology of load method typically using the direct dip-coating of titania powder and colloidal sol-
The major class of immersing hydrogels pulling film forming two ([6] H.Zhang, R.L.Zong, J.C.Zhao and Y.F.Zhu.Dramatic
visible photocatalytic degradation performances due to synergetic effect of
TiO2 with PANI[J].Environment Science&Technol ogy,2008,42(10):3803–3807.[8]
Zheng Shukai,Wu Guohao,Zhang Junying,et al.Energy band structure and
photocatalytic activityof Sn-doped TiO2 thin film[J].Journal of Materials
Engineering,2014,42(1):70-74.[9]Tao Liqin,Zhao Yi xia,Kang Wei min,et
al.Preparation of titanium dioxide loaded on polytetrafluoroethylene
superfine-fiber andits photocatalytic performance[J].Journal of the Chinese
Cerami c Society,2016,44(1):89-94.].Although existing carrying method has certain effect, carrier knot
Structure performance is not ideal enough, and load system specific surface is small, and catalysis activity is significantly lower than suspended substance method ([8] Zheng Shukai, Wu
Guohao,Zhang Junying,et al.Energy band structure and photocatalytic
activityof Sn-doped TiO2 thin film[J].Journal of Materials Engineering,2014,
42(1):70-74.].Therefore, key point from current optically catalytic TiO 2 oxidation sewage disposal technology to industrial applications still
Concentrate on fixed TiO2In the carrier selection of nanostructured and effective technique for fixing.
The present invention uses nontoxic natural zeolite that the light floamed ceramic of loose structure is prepared for primary raw material, passes through
The method of its load photocatalytic activity layer, acquisition is easy to reclaim, is not likely to produce secondary pollution and to Organic Pollutants In Water energy
Enough novel photocatalysis composites for effectively carrying out photocatalytic degradation.
The content of the invention：
It is an object of the invention to provide a kind of area load photocatalytic activity layer foamed ceramics composite, particularly
A kind of light floamed ceramic composite of area load photocatalytic activity layer.Preparation method uses sol-gel
Technique：Light floamed ceramic is placed in TiO 2 sol is first impregnated, sintered under certain condition after drying, so in pottery
Porcelain surface obtains one layer of titanium dioxide active layer with photocatalytic activity.
The foamed ceramics composite of the area load photocatalytic activity layer in the present invention, it is characterised in that：Its foam is made pottery
Porcelain basal body be through hole network structure (referring to Fig. 1), matrix surface loaded one layer have photocatalytic activity titanium dioxide (referring to
Fig. 2).
The light floamed ceramic that the present invention is prepared with natural zeolite as primary raw material as matrix, using sol-gel technology,
Colloidal sol is produced by titanium source of butyl titanate, by dipping, dry, sintering, is lived in the photocatalysis of ceramic surface carried titanium dioxide
Property layer.The preparation condition of offer is：Stand-by TiO 2 sol is aged 24-48 hours, and the drying temperature after matrix dipping is 60
DEG C, ensuing sintering temperature is 300-500 DEG C.
Titanium dioxide active layer load light floamed ceramic composite prepared by the present invention, with good photocatalytic
Can, the catalysis material of Organic Pollutants In Water degraded can be directly used as.
Brief description of the drawings：
Fig. 1 foamed ceramics matrix patterns.
Fig. 2 matrix surfaces carried titanium dioxide layer pattern.
Specific embodiment：
Embodiment 1：First by absolute ethyl alcohol (analysis pure), butyl titanate, acetylacetone,2,4-pentanedione (analysis is pure), deionized water,
Nitric acid (analysis pure) by volume 77:25:3.8:2.5:1 preparing titanium dioxide colloidal sol, concrete operations are as follows：Successively by levulinic
(ethanol consumption is 2/3rds of total amount) is made into solution A during ketone, butyl titanate are slowly dropped into ethanol, then will go successively from
(ethanol consumption is 1/3rd of total amount) is made into B solution during sub- water, nitric acid successively instill ethanol, finally slowly drips B solution
In entering solution A.Said process is carried out under the conditions of magnetic agitation.Mixed liquor is aged 48 hours, obtains stand-by colloidal sol.Will voluntarily
The block light floamed ceramic sample of development puts into above-mentioned colloidal sol, and sonic oscillation 20min is sufficiently impregnated it, in baking oven after taking-up
In dry 1h in 60 DEG C, obtain the porous sample of area load titania gel.Repeated boad three times, obtains having certain thickness
The homogeneous gel layer of degree.Above-mentioned sample is put into electrocaloric effect, temperature is brought up to from room temperature with the programming rate of 1.5 DEG C/min
400 DEG C, it is incubated 30min.Sample is taken out after stove is cold, the sample of carried titanium dioxide active layer is obtained.
Embodiment 2：Methyl orange has the typical structure of dye class compound, and it is the first of 20mg/L that the present invention uses concentration
Base orange solution as dyestuff Organic Pollution waste water model.Photocatalytic degradation light source uses wavelength ultraviolet for the 500W of 365nm
Lamp, solution absorbance is measured using UV-9100 ultraviolet specrophotometers.Measure 50ml methyl orange solutions to be placed in beaker, put into
1.0g loads composite sample.Solution in beaker when measuring ultra violet lamp 5min, 10min, 15min, 20min, 25min, 30min
Absorbance (table 1), and the degradation rate percent of decolourization of solution (correspond to) of methyl orange is calculated by absorbance, be as a result together listed in
Table 1.Absorbance is with the relation of degradation rate：Degradation rate (%)=(A0- A)/A0, A in formula0It is stoste absorbance, A is to be urged through light
Change solution absorbance after degraded.Experiment display, after ultraviolet irradiation 30min, up to more than 99%, solution becomes methyl orange photodegradation rate
It is water white transparency.
Degradation rate (percent of decolourization) of the loaded absorbent article of table 1 to methyl orange solution
Comparative example：The foamed ceramics product of carried titanium dioxide is changed into the foam pottery without load in the above-described embodiments
Ceramic products, other conditions are constant, and gained degradation rate is shown in Table 2.It can be seen that being put into the sample without load, ultraviolet light in the solution
Methyl Orange still has certain degraded.This is because ultraviolet light is in itself directly to the effect of methyl orange, rather than unsupported foam
The photocatalysis effect of ceramic.
Table 2 is without loaded absorbent article to the degradation rate (percent of decolourization) of methyl orange solution
Claims (3)
1. the light floamed ceramic composite of a kind of area load photocatalytic activity layer, it is characterised in that：The product is lightweight
One layer of photocatalytic activity of foamed ceramics area load layer it is composite porous, may float on the water surface；Wherein light floamed ceramic
Used as the carrier that active layer is loaded, and the active layer of area load has light-catalysed function.
2. the light floamed ceramic composite of area load photocatalytic activity layer described in claim 1, its surface-active layer
It is the titanium dioxide with photocatalytic activity, is obtained using sol-gel process.
3. the light floamed ceramic composite of area load photocatalytic activity layer described in claim 1, it is adaptable in water body
The photocatalytic degradation of organic pollution, and have the advantages that to be easy to salvage because it may float on the water surface, reclaim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710212099.5A CN106902797A (en) | 2017-03-31 | 2017-03-31 | The light floamed ceramic composite of area load photocatalytic activity layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710212099.5A CN106902797A (en) | 2017-03-31 | 2017-03-31 | The light floamed ceramic composite of area load photocatalytic activity layer |
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| CN106902797A true CN106902797A (en) | 2017-06-30 |
Family
ID=59195084
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| CN201710212099.5A Pending CN106902797A (en) | 2017-03-31 | 2017-03-31 | The light floamed ceramic composite of area load photocatalytic activity layer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437412A (en) * | 2018-12-21 | 2019-03-08 | 河海大学 | A kind of ecological fiber and preparation method and application |
| CN109776083A (en) * | 2018-12-26 | 2019-05-21 | 古一（广东）建材有限公司 | A kind of multi-stage porous ceramic material and preparation method thereof with complex function |
| CN111285429A (en) * | 2020-02-29 | 2020-06-16 | 西南石油大学 | Low-transmittance sewage photocatalytic treatment composite board and preparation method thereof |
| EP4331721A1 (en) | 2022-08-31 | 2024-03-06 | Calistair SAS | Catalytic system with photocatalyst and gas depollution apparatus containing the same |
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| CN101519316A (en) * | 2009-04-15 | 2009-09-02 | 北京师范大学 | Novel foam zeolite granule and preparation method thereof |
| CN101660080A (en) * | 2009-10-14 | 2010-03-03 | 北京师范大学 | Microporous mesh structural porous tungsten structure with high porosity and preparation method thereof |
| CN101700487A (en) * | 2009-12-22 | 2010-05-05 | 北京师范大学 | Foam zeolite granule carrying active substance on surface and preparation method thereof |
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| CN101519316A (en) * | 2009-04-15 | 2009-09-02 | 北京师范大学 | Novel foam zeolite granule and preparation method thereof |
| CN101660080A (en) * | 2009-10-14 | 2010-03-03 | 北京师范大学 | Microporous mesh structural porous tungsten structure with high porosity and preparation method thereof |
| CN101700487A (en) * | 2009-12-22 | 2010-05-05 | 北京师范大学 | Foam zeolite granule carrying active substance on surface and preparation method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437412A (en) * | 2018-12-21 | 2019-03-08 | 河海大学 | A kind of ecological fiber and preparation method and application |
| CN109437412B (en) * | 2018-12-21 | 2021-09-17 | 河海大学 | Ecological fiber and preparation method and application thereof |
| CN109776083A (en) * | 2018-12-26 | 2019-05-21 | 古一（广东）建材有限公司 | A kind of multi-stage porous ceramic material and preparation method thereof with complex function |
| CN111285429A (en) * | 2020-02-29 | 2020-06-16 | 西南石油大学 | Low-transmittance sewage photocatalytic treatment composite board and preparation method thereof |
| EP4331721A1 (en) | 2022-08-31 | 2024-03-06 | Calistair SAS | Catalytic system with photocatalyst and gas depollution apparatus containing the same |
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