CN106000374A - Method for preparing solid titanium dioxide photocatalyst - Google Patents
Method for preparing solid titanium dioxide photocatalyst Download PDFInfo
- Publication number
- CN106000374A CN106000374A CN201610412779.7A CN201610412779A CN106000374A CN 106000374 A CN106000374 A CN 106000374A CN 201610412779 A CN201610412779 A CN 201610412779A CN 106000374 A CN106000374 A CN 106000374A
- Authority
- CN
- China
- Prior art keywords
- titanium dioxide
- solid titanium
- dioxide photocatalyst
- solid
- hydrophilizing agent
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 25
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 22
- 239000007787 solid Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 16
- 238000002360 preparation method Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 6
- -1 sorbitan fatty acid ester Chemical class 0.000 claims description 14
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 239000007767 bonding agent Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 3
- SRSXLGNVWSONIS-UHFFFAOYSA-M benzenesulfonate Chemical compound [O-]S(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-M 0.000 claims description 3
- 229940077388 benzenesulfonate Drugs 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 239000010452 phosphate Substances 0.000 claims description 3
- 229950008882 polysorbate Drugs 0.000 claims description 3
- 229920000136 polysorbate Polymers 0.000 claims description 3
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 3
- 150000005846 sugar alcohols Polymers 0.000 claims description 3
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 6
- 230000003197 catalytic effect Effects 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract 2
- 230000001070 adhesive effect Effects 0.000 abstract 2
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000000354 decomposition reaction Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- OUUQCZGPVNCOIJ-UHFFFAOYSA-M Superoxide Chemical compound [O-][O] OUUQCZGPVNCOIJ-UHFFFAOYSA-M 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000002075 main ingredient Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 206010070834 Sensitisation Diseases 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000001408 fungistatic effect Effects 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000007146 photocatalysis Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000003389 potentiating effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene 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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Dentistry (AREA)
- Health & Medical Sciences (AREA)
- Plant Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Inorganic Chemistry (AREA)
- Agronomy & Crop Science (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a method for preparing a solid titanium dioxide photocatalyst. The method includes the steps that firstly, the photocatalyst is prepared from, by mass, 20-60% of nanoscale titanium dioxide, 5-10% of dispersion agent, 5-10% of adhesive, 5-10% of hydrophilic agent and the balance water; secondly, 20-60% of nanoscale titanium dioxide, 5-10% of dispersion agent, 5-10% of adhesive, 5-10% of hydrophilic agent and the balance water are mixed and stirred for 10-20 min to form mixed liquid; thirdly, the mixed liquid obtained in the second step is purified and dried to obtain the solid titanium dioxide photocatalyst. The preparation method is simple, titanium dioxide is small in particle size, the catalytic effect is good, corrosion is not caused, oxidization capacity is higher, and the antibacterial effect is better.
Description
Technical field
The present invention relates to technical field of air purification, particularly relate to a kind of solid titanium dioxide photocatalyst preparation method.
Background technology
Progress along with science and technology, growth in the living standard, the comfort level of living environment is required more and more higher by people, on interior decoration, because using composite in a large number, inevitably facing " room air pollution " is main third time environmental pollution, pollutant kind mostly is the volatile organic content such as formaldehyde, benzene,toluene,xylene, meanwhile, some noxious bacteria, the growth of fungus, the same life health giving people brings harm.Photocatalyst (nano titanium oxide) is under the irradiation of short wavelength light, water in air or oxygen catalytic can be become the extremely strong hydroxyl radical free radical of oxidability and ultra-oxygen anion free radical, active oxygens etc. have the optical active group of extremely strong oxidability, the energy equivalence of these optical active groups is in the high temperature of 3600K, there is the strongest oxidisability, these strong oxidizing property groups can the various organic compound with unstable chemical bond of potent decomposition and part inorganic matter, and cell membrane and the protein carrier of solidification virus of antibacterial can be destroyed, thus effective decomposing organic matter, kill antibacterial, virus, and indoor substantial amounts of negative oxygen ion can be given, care health.Presently commercially available photocatalyst is mostly the aqueous dispersions of titanium dioxide, and solid content is the highest；Also have some solid product dispersibility poor.And, it is not strong that these products generally also exist photocatalytic, and light utilization is low, and bactericidal effect is undesirable, without shortcomings such as bacteriostasis, is therefore badly in need of a kind of novel solid photocatalyst that can solve the problem that above-mentioned deficiency.
Summary of the invention
The invention provides a kind of solid titanium dioxide photocatalyst preparation method, preparation method is simple, titanium dioxide particle diameter is little, excellent catalytic effect, will not produce corrosiveness, and oxidability is higher, and bactericidal effect is more preferable.
For solving above-mentioned technical problem, the embodiment of the present application provides a kind of solid titanium dioxide photocatalyst preparation method, comprises the following steps:
S1, by percentage to the quality, composed of the following components, Nano titanium dioxide 20～60%, dispersant 5～10%, bonding agent 5～10%, hydrophilizing agent 5～10%, hydrophilizing agent 5～10%, surplus is water；
S2, by Nano titanium dioxide 20～60%, dispersant 5～10%, bonding agent 5～10%, hydrophilizing agent 5～10%, hydrophilizing agent 5～10%, surplus is that water mix and blend forms mixing liquid for 10-20 minute；
S3, mixing liquid step S2 obtained are purified, are drying to obtain solid solid titanium dioxide photocatalyst.
As a preferred technical scheme of the present invention, the crystal formation of described Nano titanium dioxide is the one in Detitanium-ore-type, rutile-type.
As a preferred technical scheme of the present invention, described dispersant be from sorbitan fatty acid ester, Polysorbate, alkylamine salt,
One or more in sulfuric acid, phosphate ester salt, quaternary ammonium salt, benzene sulfonate, polyoxyethylene, polyhydric alcohol.
As a preferred technical scheme of the present invention, the particle diameter of described nanometer silver is 20～30nm.
As a preferred technical scheme of the present invention, being dried as being dried 3h under conditions of 100 ° of C of described step S3.
The one or more technical schemes provided in the embodiment of the present application, at least have the following technical effect that or advantage:
Preparation method is simple, titanium dioxide particle diameter is little, excellent catalytic effect, will not produce corrosiveness, and oxidability is higher, and bactericidal effect is more preferable.
Detailed description of the invention
In order to be better understood from technique scheme, the most in particular embodiments technique scheme is described in detail.
Embodiment one
A kind of solid titanium dioxide photocatalyst preparation method described in the present embodiment, comprises the following steps:
S1, by percentage to the quality, composed of the following components, Nano titanium dioxide 20～60%, dispersant 5～10%, bonding agent 5～10%, hydrophilizing agent 5～10%, hydrophilizing agent 5～10%, surplus is water；
S2, by Nano titanium dioxide 20～60%, dispersant 5～10%, bonding agent 5～10%, hydrophilizing agent 5～10%, hydrophilizing agent 5～10%, surplus is that water mix and blend forms mixing liquid for 10-20 minute；
S3, mixing liquid step S2 obtained are purified, are drying to obtain solid solid titanium dioxide photocatalyst.
Wherein, in the present embodiment, the crystal formation of described Nano titanium dioxide is the one in Detitanium-ore-type, rutile-type.
Wherein, in the present embodiment, described dispersant is one or more in sorbitan fatty acid ester, Polysorbate, alkylamine salt, sulfuric acid, phosphate ester salt, quaternary ammonium salt, benzene sulfonate, polyoxyethylene, polyhydric alcohol.
Wherein, in the present embodiment, the particle diameter of described nanometer silver is 20～30nm.
Wherein, in the present embodiment, being dried as being dried 3h under conditions of 100 ° of C of described step S3.
This solid photocatalyst adds nanometer silver, has both added sterilization, fungistatic effect, and the photocatalysis to titanium dioxide simultaneously has sensitization effect, has three functions and reaches automatically cleaning effect:
Luminous energy is converted into chemical energy, decomposition function.
Principle: photocatalyst uses Nano titanium dioxide to be Main Ingredients and Appearance, and titanium dioxide belongs to N-type semiconductor, and electronics is transitted to conduction band by valence band under the effect of light, produces electronics and hole.Oxygen in electronics and air reacts generation superoxide anion, and the smuggled goods HO-of hole and surface adsorption reacts the hydroxyl radical free radical-OH of formation strong oxidizing property.-OH has all organic compound of decomposition and the ability of part inorganic compound, and superoxide anion has the effect of sterilization.
Because principles above can play two effects:
The ultra-violet absorption faded being caused to fall paint in sunlight, because ultraviolet is the strongest, the ultraviolet of absorption, and to be converted into the ability of decomposition the strongest, is substantially reduced the ultraviolet infringement to paint, thus extends the fading rate of paint.
Capacity of decomposition, can decompose aluminum veneer being painted mordant material (such as: the greasy dirt etc. in vehicle exhaust, air) in the middle of air, resolve into water and carbon dioxide.The situations such as very big limit avoids paint to be corroded in the middle of natural atmosphere, variable color (after aluminum veneer time length, blackening is all because being corroded) occur.
Antistatic, reduces dust adhesion.
Because product Main Ingredients and Appearance broadly falls into inorganic matter, being not likely to produce electrostatic, therefore painted surface is the least to the suction of the dust in air, thus dust is difficult at remained on surface.
When the Nature is without rainwater, hence it is evident that fewer than the dust adhesion amount of the aluminum veneer without self-cleaning function.
Ultrahydrophilic, meets water surface and forms hydrophilic film.
Titanium dioxide is under the effect of light, and its surface is covered by OH base, is transformed into and has in extremely strong confluent state and product the hydrophilic having other auxiliary materials itself to have with water, thus surface has super hydrophilic performance.
After running into rainwater in natural environment, surface forms hydrophilic film, the particulate matter of the dust of remained on surface can be rinsed out.
With compared with the aluminum veneer of self-cleaning function, surface will not remain water stain.Lower rainfall is equivalent to clean once.
The above, it it is only presently preferred embodiments of the present invention, not the present invention is made any pro forma restriction, although the present invention is disclosed above with preferred embodiment, but it is not limited to the present invention, any those skilled in the art, in the range of without departing from technical solution of the present invention, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is the content without departing from technical solution of the present invention, any simple modification above example made according to the technical spirit of the present invention, equivalent variations and modification, all still fall within the range of technical solution of the present invention.
Claims (5)
1. a solid titanium dioxide photocatalyst preparation method, it is characterised in that comprise the following steps:
S1, by percentage to the quality, composed of the following components, Nano titanium dioxide 20～60%, dispersant 5～10%, bonding agent 5～10%, hydrophilizing agent 5～10%, hydrophilizing agent 5～10%, surplus is water；
S2, by Nano titanium dioxide 20～60%, dispersant 5～10%, bonding agent 5～10%, hydrophilizing agent 5～10%, hydrophilizing agent 5～10%, surplus is that water mix and blend forms mixing liquid for 10-20 minute；
S3, mixing liquid step S2 obtained are purified, are drying to obtain solid solid titanium dioxide photocatalyst.
A kind of solid titanium dioxide photocatalyst preparation method the most according to claim 1, it is characterised in that the crystal formation of described Nano titanium dioxide is the one in Detitanium-ore-type, rutile-type.
A kind of solid titanium dioxide photocatalyst preparation method the most according to claim 1, it is characterised in that described dispersant be from sorbitan fatty acid ester, Polysorbate, alkylamine salt,
One or more in sulfuric acid, phosphate ester salt, quaternary ammonium salt, benzene sulfonate, polyoxyethylene, polyhydric alcohol.
A kind of solid titanium dioxide photocatalyst preparation method the most according to claim 2, it is characterised in that the particle diameter of described nanometer silver is 20～30nm.
A kind of solid titanium dioxide photocatalyst preparation method the most according to claim 1, it is characterised in that being dried as being dried 3h under conditions of 100 ° of C of described step S3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412779.7A CN106000374A (en) | 2016-06-14 | 2016-06-14 | Method for preparing solid titanium dioxide photocatalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610412779.7A CN106000374A (en) | 2016-06-14 | 2016-06-14 | Method for preparing solid titanium dioxide photocatalyst |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106000374A true CN106000374A (en) | 2016-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610412779.7A Pending CN106000374A (en) | 2016-06-14 | 2016-06-14 | Method for preparing solid titanium dioxide photocatalyst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106000374A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514796A (en) * | 2017-08-23 | 2017-12-26 | 洪源 | A kind of air-conditioner air outlet nano material filter bowl |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030034586A (en) * | 2001-10-26 | 2003-05-09 | 한국화학연구원 | Equipment for treatment of organic compound in water using immobilized photocatalyst |
| CN1830549A (en) * | 2006-04-07 | 2006-09-13 | 陈延东 | Photocatalyst material |
| CN103894215A (en) * | 2012-12-26 | 2014-07-02 | 大连林桥科技有限公司 | Nanometer composite photocatalyst |
-
2016
- 2016-06-14 CN CN201610412779.7A patent/CN106000374A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030034586A (en) * | 2001-10-26 | 2003-05-09 | 한국화학연구원 | Equipment for treatment of organic compound in water using immobilized photocatalyst |
| CN1830549A (en) * | 2006-04-07 | 2006-09-13 | 陈延东 | Photocatalyst material |
| CN103894215A (en) * | 2012-12-26 | 2014-07-02 | 大连林桥科技有限公司 | Nanometer composite photocatalyst |
Non-Patent Citations (1)
| Title |
|---|
| 唐建林: "球状、孔状二氧化钛光催化剂的制备与掺杂及其性能研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107514796A (en) * | 2017-08-23 | 2017-12-26 | 洪源 | A kind of air-conditioner air outlet nano material filter bowl |
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Application publication date: 20161012 |
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