CN106423299A - Preparation method for functional foam carbon for photo-catalytically degrading formaldehyde - Google Patents
Preparation method for functional foam carbon for photo-catalytically degrading formaldehyde Download PDFInfo
- Publication number
- CN106423299A CN106423299A CN201611014928.0A CN201611014928A CN106423299A CN 106423299 A CN106423299 A CN 106423299A CN 201611014928 A CN201611014928 A CN 201611014928A CN 106423299 A CN106423299 A CN 106423299A
- Authority
- CN
- China
- Prior art keywords
- formaldehyde
- photo
- preparation
- tio2
- carbon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title abstract description 32
- 229910052799 carbon Inorganic materials 0.000 title abstract 8
- 239000006260 foam Substances 0.000 title abstract 6
- 230000000593 degrading effect Effects 0.000 title abstract 4
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000001699 photocatalysis Effects 0.000 claims abstract description 16
- 230000015556 catabolic process Effects 0.000 claims abstract description 13
- 238000006731 degradation reaction Methods 0.000 claims abstract description 13
- 239000011496 polyurethane foam Substances 0.000 claims abstract description 13
- 229920005830 Polyurethane Foam Polymers 0.000 claims abstract description 10
- 238000005187 foaming Methods 0.000 claims abstract description 4
- 239000003610 charcoal Substances 0.000 claims description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 15
- 230000003647 oxidation Effects 0.000 claims description 13
- 238000007254 oxidation reaction Methods 0.000 claims description 13
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- SCYULBFZEHDVBN-UHFFFAOYSA-N 1,1-Dichloroethane Chemical compound CC(Cl)Cl SCYULBFZEHDVBN-UHFFFAOYSA-N 0.000 claims description 3
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 claims description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 3
- 238000003763 carbonization Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- UKODFQOELJFMII-UHFFFAOYSA-N pentamethyldiethylenetriamine Chemical compound CN(C)CCN(C)CCN(C)C UKODFQOELJFMII-UHFFFAOYSA-N 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 230000005070 ripening Effects 0.000 claims description 3
- 229920002545 silicone oil Polymers 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 22
- 238000001179 sorption measurement Methods 0.000 abstract description 8
- 239000004814 polyurethane Substances 0.000 abstract description 4
- 229920002635 polyurethane Polymers 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000008204 material by function Substances 0.000 abstract 1
- 230000002195 synergetic effect Effects 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 229930040373 Paraformaldehyde Natural products 0.000 description 3
- 229920002866 paraformaldehyde Polymers 0.000 description 3
- 238000007146 photocatalysis Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 208000014181 Bronchial disease Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002156 adsorbate Substances 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 231100000739 chronic poisoning Toxicity 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000006552 photochemical reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 150000003384 small molecules Chemical group 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000012855 volatile organic compound 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
- B01J31/38—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of titanium, zirconium or hafnium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/80—Type of catalytic reaction
- B01D2255/802—Photocatalytic
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
Abstract
The invention relates to the technical field of functional materials and specifically relates to a preparation method for functional foam carbon for photo-catalytically degrading formaldehyde. The preparation method for functional foam carbon for photo-catalytically degrading formaldehyde comprises the following steps: taking polyurethane and activated carbon as raw materials and thermally treating, thereby acquiring polyurethane foam carbon; and then loading TiO2, thereby acquiring the functional foam carbon with photo-catalytic activity. The polyurethane foam carbon prepared according to the method provided by the invention has an advanced netted structure; polyurethane is tightly combined with activated carbon; the loaded TiO2 is mainly distributed on the surfaces of foam carbon holes; the TiO2 loaded functional foam carbon can remove formaldehyde under the synergistic effect of adsorption and photo-catalytically degradation; the abundant foaming hole structures can supply a large amount of attachment points to formaldehyde gas; under the irradiation of ultraviolet light, TiO2 can photo-catalytically degrade formaldehyde into micro-molecules; and high activated carbon dosage and TiO2 doped content both are beneficial to the removal of formaldehyde gas. When the dosage of activated carbon is 35% and the doped content of TiO2 is 2%, the photo-catalytically degrading rate is maximal and reaches up to 85.3%.
Description
Technical field
The present invention relates to technical field of function materials, and in particular to a kind of preparation of formaldehyde degradation by photocatalytic oxidation process function Carbon foam
Method.
Background technology
Formaldehyde is a kind of with very supervirulent gas, the construction material of interior decoration, hard board, furniture, coating, oil
Paint, textile etc., can all discharge formaldehyde in use, and most long acquisition time is up to the more than ten years.Work as indoor formaldehyde content
For 0.1 mg/m3When just have abnormal flavour and a sense of discomfort, suck high-concentration formaldehyde, respiratory tract and disease of bronchus can be caused；Connect for a long time
Tactile low dosage formaldehyde can cause chronic poisoning, and severe patient causes death.Therefore, the method for exploring effectively removal indoor formaldehyde is mesh
One of front study hotspot.
In terms of formaldehyde removal, numerous studies have been carried out both at home and abroad.In numerous purification techniques, absorption method and TiO2Light is urged
Change method is presently the most widely used Formaldehyde Pollution of Indoor Air purification method.Compared with other adsorbents, activated carbon surface has many
Pore structure and various active groups, have the characteristics that adsorption capacity is big, the rate of adsorption fast, be easy to regeneration, controlling in gaseous formaldehyde
Obvious advantage is demonstrated by terms of reason.Activated carbon adsorption formaldehyde relies primarily on the physics of the micropore in its structure and mesoporous PARA FORMALDEHYDE PRILLS(91,95)
Adsorption, with the prolongation of use time, the absorption of activated carbon PARA FORMALDEHYDE PRILLS(91,95) gas will reach saturation, lose absorption property.
TiO2The photochemical reaction induced by the Photo-induced electron transfer process of particle interface is organic in environment for eliminating
Polluter, with remarkable result, it is expected to develop into direct utilization in the air oxygen and solar energy degraded hazardous contaminant
Green oxidation technology.By TiO2Research is combined with porous charcoal and shows, porous charcoal is used as adsorption site, and its strong absorption property can be right
Light concentration organic pollutant carries out effectively enrichment, concentrates, and is TiO2High concentration reaction environment is provided, accelerates TiO2Photocatalysis drop
Solution speed；TiO2The concentration difference of adsorbate inside and outside porous charcoal can be formed as degraded center, realized the in-situ regeneration of porous charcoal, prolonged
Long porous charcoal reaches the time of adsorption saturation, increases the equilibrium adsorption capacity of porous charcoal.In addition, the absorption of porous charcoal is effectively reduced
The release of volatility photocatalysis intermediate product, can eliminate the secondary pollution produced by volatile intermediate products.But it is traditional activated
Charcoal not easy-formation, and dust pollution is easily caused, the function Carbon Materials that thus be accordingly used in synthesis indoor VOCs purification remain certain defect.
Content of the invention
It is contemplated that the problems referred to above are directed to, a kind of preparation method of formaldehyde degradation by photocatalytic oxidation process function Carbon foam is proposed.
Technical program of the present invention lies in：
The preparation method of formaldehyde degradation by photocatalytic oxidation process function Carbon foam, comprises the steps：
（1）The preparation of polyurethane foam charcoal：
Using ACrawAdd in glass mold, plus people's polyethers, the silicone oil that hard bubbles, water, pentamethyl-diethylenetriamine AM-1, one fluorine of dichloro
Ethane, ethylenimine mix homogeneously in a mold, stirs 1 min with the speed of 500～600 r/min, adds diphenyl methane
Diisocyanate MDI, makes its free foaming with 45 S of speed strong stirring of 1000r/min, 24 h of ripening under room temperature, then
It is placed in Muffle furnace and 350 DEG C of carbonization l h is warmed up to 5 DEG C/rain；Make polyurethane foam charcoal；
（2）The preparation of formaldehyde degradation by photocatalytic oxidation process function Carbon foam：
Prepare the TiO of 50mL 1% ~ 2%2Solution, under weak ultrasound wave, ultrasonic 15 min makes which uniformly mix；By prepared
CF/AC35And CF/AC10Polyurethane foam charcoal is added separately to the TiO of 50 mL 1% ~ 2%2In solution, take after 15 min of dipping
Go out 100 DEG C of 24 h of drying, obtain formaldehyde degradation by photocatalytic oxidation process function Carbon foam.
The method have technical effect that：
With polyurethane and activated carbon as the thermally treated prepared polyurethane foam charcoal of raw material, TiO is then supported2It is obtained with photocatalysis
The function Carbon foam of activity.As a result show, the polyurethane foam charcoal of preparation assumes the network structure of prosperity, polyurethane and activated carbon
It is tightly combined.Support TiO2It is mainly distributed on Carbon foam channel surfaces.TiO2The removal for supporting function Carbon foam PARA FORMALDEHYDE PRILLS(91,95) shows as
Absorption and the synergism of photocatalytic degradation, abundant cystose pore passage structure provides substantial amounts of attachment point for formaldehyde gases,
Under the irradiation of ultraviolet light, TiO2It is small molecule, high activated carbon addition and TiO by its photocatalytic degradation2Doping is all conducive to
The removal of formaldehyde gases.When activated carbon addition is 35%, TiO2When doping is 2%, photocatalytic activity highest, reach
85.3%.
Specific embodiment
The preparation method of formaldehyde degradation by photocatalytic oxidation process function Carbon foam, comprises the steps：
（1）The preparation of polyurethane foam charcoal：
Using ACrawAdd in glass mold, plus people's polyethers, the silicone oil that hard bubbles, water, pentamethyl-diethylenetriamine AM-1, one fluorine of dichloro
Ethane, ethylenimine mix homogeneously in a mold, stirs 1 min with the speed of 500～600 r/min, adds diphenyl methane
Diisocyanate MDI, makes its free foaming with 45 S of speed strong stirring of 1000r/min, 24 h of ripening under room temperature, then
It is placed in Muffle furnace and 350 DEG C of carbonization l h is warmed up to 5 DEG C/rain；Make polyurethane foam charcoal.
（2）The preparation of formaldehyde degradation by photocatalytic oxidation process function Carbon foam：
Prepare the TiO of 50mL 1% ~ 2%2Solution, under weak ultrasound wave, ultrasonic 15 min makes which uniformly mix；By prepared
CF/AC35And CF/AC10Polyurethane foam charcoal is added separately to the TiO of 50 mL 1% ~ 2%2In solution, take after 15 min of dipping
Go out 100 DEG C of 24 h of drying, obtain formaldehyde degradation by photocatalytic oxidation process function Carbon foam.
Claims (1)
1. the preparation method of formaldehyde degradation by photocatalytic oxidation process function Carbon foam, it is characterised in that：Comprise the steps：
（1）The preparation of polyurethane foam charcoal：
Using ACrawAdd in glass mold, plus people's polyethers, the silicone oil that hard bubbles, water, pentamethyl-diethylenetriamine AM-1, one fluorine of dichloro
Ethane, ethylenimine mix homogeneously in a mold, stirs 1 min with the speed of 500～600 r/min, adds diphenyl methane
Diisocyanate MDI, makes its free foaming with 45 S of speed strong stirring of 1000r/min, 24 h of ripening under room temperature, then
It is placed in Muffle furnace and 350 DEG C of carbonization l h is warmed up to 5 DEG C/rain；Make polyurethane foam charcoal；
（2）The preparation of formaldehyde degradation by photocatalytic oxidation process function Carbon foam：
Prepare the TiO of 50mL 1% ~ 2%2Solution, under weak ultrasound wave, ultrasonic 15 min makes which uniformly mix；By prepared
CF/AC35And CF/AC10Polyurethane foam charcoal is added separately to the TiO of 50 mL 1% ~ 2%2In solution, take after 15 min of dipping
Go out 100 DEG C of 24 h of drying, obtain formaldehyde degradation by photocatalytic oxidation process function Carbon foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611014928.0A CN106423299A (en) | 2016-11-18 | 2016-11-18 | Preparation method for functional foam carbon for photo-catalytically degrading formaldehyde |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611014928.0A CN106423299A (en) | 2016-11-18 | 2016-11-18 | Preparation method for functional foam carbon for photo-catalytically degrading formaldehyde |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106423299A true CN106423299A (en) | 2017-02-22 |
Family
ID=58220312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611014928.0A Pending CN106423299A (en) | 2016-11-18 | 2016-11-18 | Preparation method for functional foam carbon for photo-catalytically degrading formaldehyde |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106423299A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108479796A (en) * | 2018-03-22 | 2018-09-04 | 广东工业大学 | A kind of cleaning equipment and its purification method of photochemical catalyst and volatile organic matter |
| CN112387110A (en) * | 2020-10-28 | 2021-02-23 | 中国石油天然气股份有限公司 | Cover plate for removing volatile organic compounds in wastewater storage and treatment facility and manufacturing method thereof |
| CN114804914A (en) * | 2022-05-18 | 2022-07-29 | 广州大学 | Preparation method of efficient, green and low-cost composite photocatalyst |
-
2016
- 2016-11-18 CN CN201611014928.0A patent/CN106423299A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108479796A (en) * | 2018-03-22 | 2018-09-04 | 广东工业大学 | A kind of cleaning equipment and its purification method of photochemical catalyst and volatile organic matter |
| CN112387110A (en) * | 2020-10-28 | 2021-02-23 | 中国石油天然气股份有限公司 | Cover plate for removing volatile organic compounds in wastewater storage and treatment facility and manufacturing method thereof |
| CN114804914A (en) * | 2022-05-18 | 2022-07-29 | 广州大学 | Preparation method of efficient, green and low-cost composite photocatalyst |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106750498A (en) | The preparation method of formaldehyde degradation by photocatalytic oxidation process function Carbon foam | |
| CN104874347B (en) | A kind of TiO2Load the preparation method and applications of nitrogen-doped graphene sponge | |
| CN104324692A (en) | Preparation method of active carbon capable of removing formaldehyde | |
| WO2016041380A1 (en) | Supported catalyst suitable for purifying air at normal temperature | |
| CN101642698A (en) | Adsorbent used for separating formaldehyde from air and preparation method thereof | |
| CN106423299A (en) | Preparation method for functional foam carbon for photo-catalytically degrading formaldehyde | |
| CN107684916B (en) | Monolithic catalyst using carbonized wood as carrier for removing formaldehyde at low temperature and preparation method thereof | |
| CN109865424A (en) | A kind of multifunctional air purifying cellular composite material | |
| CN101199912A (en) | Formaldehyde gas absorber | |
| CN104368325A (en) | Preparation method of formaldehyde-photodegrading honeycomb activated carbon | |
| CN109569519A (en) | The method for preparing active sludge carbon base formaldehyde adsorbent using municipal sludge | |
| CN110270379A (en) | A kind of MnOx- MOF-Gr composite material and preparation method and application | |
| CN110801720A (en) | Green and low-toxicity formaldehyde scavenger and preparation method thereof | |
| CN205760607U (en) | A kind of compound bio bed cleaning equipment of VOCs | |
| CN108946727A (en) | The method for preparing active carbon using microalgae-alginate complex | |
| CN109364881A (en) | Preparation method of feeble-acid-ammonium salt modified activated carbon and products thereof and application | |
| CN104445181A (en) | Activated carbon and preparation method thereof | |
| CN108176415A (en) | A kind of air purification raw material of wood-charcoal cleans regenerative use technology | |
| CN110142022A (en) | Preparation method of graphene aerogel for air purification | |
| CN108906006A (en) | It is a kind of can efficient absorption formaldehyde modified graphene sponge preparation method | |
| CN108413509A (en) | One kind removing formaldehyde dust air purifier | |
| CN103446874A (en) | Composite air purifying agent and preparation method thereof | |
| CN104226241A (en) | Adsorbent with adsorption and oxidation synergistic effects on indoor toluene and preparation method and application of adsorbent | |
| CN101224382A (en) | Compound depurative preparing method for removing methanol from air | |
| CN104772133A (en) | Indoor cleaning photocatalyst and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170222 |