CN107715921A - A kind of indoor formaldehyde removes catalyst and preparation method thereof - Google Patents

A kind of indoor formaldehyde removes catalyst and preparation method thereof Download PDF

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Publication number
CN107715921A
CN107715921A CN201710966904.3A CN201710966904A CN107715921A CN 107715921 A CN107715921 A CN 107715921A CN 201710966904 A CN201710966904 A CN 201710966904A CN 107715921 A CN107715921 A CN 107715921A
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唐宏泉
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    • 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
    • B01J35/19—Catalysts containing parts with different compositions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/22—Ionisation
    • 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
    • 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
    • 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
    • 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
    • B01J21/16—Clays or other mineral silicates
    • 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
    • B01J21/18—Carbon
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/06—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of zinc, cadmium or mercury
    • 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
    • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/24—Nitrogen compounds
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/20—Method-related aspects
    • A61L2209/21—Use of chemical compounds for treating air or the like
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/20—Method-related aspects
    • A61L2209/22—Treatment by sorption, e.g. absorption, adsorption, chemisorption, scrubbing, wet cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/91—Bacteria; Microorganisms

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  • Chemical Kinetics & Catalysis (AREA)
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Abstract

The invention discloses a kind of indoor formaldehyde to remove catalyst and preparation method thereof, catalyst component includes 10 20 parts of nano titanium oxide, 4 12 parts of diammonium hydrogen phosphate, 5 10 parts of silicon powder, 28 parts of nano whisker silicon, 4 12 parts of polyvinyl alcohol, 3 10 parts of diatomite, 16 parts of nanometer anion powder, 28 parts of nano zine oxide, 4 12 parts of active carbon nanoparticles in parts by weight, the catalyst of the present invention can effectively remove the formaldehyde of interior, keep room air pure and fresh.

Description

A kind of indoor formaldehyde removes catalyst and preparation method thereof
Technical field
The present invention relates to catalyst preparing technical field, specially a kind of indoor formaldehyde removes catalyst and preparation method thereof.
Background technology
The housing industry in China is interior over the next several years will persistently to keep high speed development situation, every year the newly-increased area of residence 5 Hundred million square metres, the old room for having 600,000,000 square metres every year in addition carries out decoration renovation.With the development of Chinese architecture adnornment industry, 2010 Year building decorating industry China have become You18Wan Jia enterprises, more than 1,400 ten thousand practitioners, 1.85 trillion yuan annual value of production it is big Industry；Since nearly 20 years, Chinese architecture adnornment industry is quickly grown, annual growth will about 20%, this data is significantly larger than the same period GDP growth rate.
At the same time, a large amount of synthetic materials are widely used in interior decoration and finished product furniture, and they are discharged The volatility toxic compounds such as formaldehyde serious pollution is caused to indoor environment, be cancer, breathing problem, leukaemia, The main inducing of immunity reduction, fetus teratogenesis etc., thus caused various diseases and indoor environment case, have had a strong impact on people The physical and mental health of the people masses and normal life.Room air pollution turns into the another killer of infringement human health.At present, interior is adopted Removing catalyst can eliminate formaldehyde to a certain extent, but removing is not thorough, and effect is poor.
The content of the invention
It is an object of the invention to provide a kind of indoor formaldehyde to remove catalyst and preparation method thereof, to solve above-mentioned background skill The problem of being proposed in art.
To achieve the above object, the present invention provides following technical scheme：A kind of indoor formaldehyde removes catalyst, and catalyst component is pressed Parts by weight include nano titanium oxide 10-20 parts, diammonium hydrogen phosphate 4-12 parts, silicon powder 5-10 parts, nano whisker silicon 2-8 Part, polyvinyl alcohol 4-12 parts, diatomite 3-10 parts, nanometer anion powder 1-6 parts, nano zine oxide 2-8 parts, active carbon nanoparticles 4- 12 parts.
Preferably, it is micro- to include 15 parts of nano titanium oxide, 8 parts of diammonium hydrogen phosphate, silicon for the preferable composition proportion of catalyst component 8 parts of powder, 5 parts of nano whisker silicon, 8 parts of polyvinyl alcohol, 7 parts of diatomite, 3 parts of nanometer anion powder, nano zine oxide 5 part, nanometer 8 parts of activated carbon.
Preferably, its preparation method comprises the following steps：
A, added after mixing silicon powder, nano whisker silicon, diatomite, nanometer anion powder, nano zine oxide, active carbon nanoparticles Ground in grinder, cross 100 mesh sieves afterwards, obtain mixture A；
B, nano titanium oxide, diammonium hydrogen phosphate are added in mixture A, stirring at low speed in stirred tank, stirring are added after mixing Speed is 300 revs/min, mixing time 10min, obtains mixture B；
C, polyvinyl alcohol is added in mixture B, after being sufficiently stirred at normal temperatures, 2h is stood at normal temperatures, that is, obtains catalyst.
Compared with prior art, the beneficial effects of the invention are as follows：The catalyst of the present invention can effectively remove interior Formaldehyde, keep room air it is pure and fresh；Wherein, nanometer anion powder, nano zine oxide, the nano active added in the present invention Charcoal, the peculiar smell of interior while formaldehyde is eliminated, can be removed, anion is discharged, further purifies air, the present invention can be with The biological pollutants such as elimination virus bacterium, product have no irritating odor, without secondary pollution；Obtained through overtesting, using this hair After bright obtained catalyst uses 1 month indoors, content of formaldehyde reduces by 95%；, being capable of fully erased formaldehyde after 2 months.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment Only part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area The every other embodiment that art personnel are obtained under the premise of creative work is not made, belong to the model that the present invention protects Enclose.
The present invention provides following technical scheme：A kind of indoor formaldehyde removes catalyst, and catalyst component includes receiving in parts by weight Rice titanium dioxide 10-20 parts, diammonium hydrogen phosphate 4-12 parts, silicon powder 5-10 parts, nano whisker silicon 2-8 parts, polyvinyl alcohol 4-12 Part, diatomite 3-10 parts, nanometer anion powder 1-6 parts, nano zine oxide 2-8 parts, active carbon nanoparticles 4-12 parts.
Embodiment one：
Catalyst component includes 10 parts of nano titanium oxide, 4 parts of diammonium hydrogen phosphate, 5 parts of silicon powder, nano whisker silicon in parts by weight 2 parts, 4 parts of polyvinyl alcohol, 3 parts of diatomite, 1 part of nanometer anion powder, 2 parts of nano zine oxide, 4 parts of active carbon nanoparticles.
The preparation method of the present embodiment comprises the following steps：
A, added after mixing silicon powder, nano whisker silicon, diatomite, nanometer anion powder, nano zine oxide, active carbon nanoparticles Ground in grinder, cross 100 mesh sieves afterwards, obtain mixture A；
B, nano titanium oxide, diammonium hydrogen phosphate are added in mixture A, stirring at low speed in stirred tank, stirring are added after mixing Speed is 300 revs/min, mixing time 10min, obtains mixture B；
C, polyvinyl alcohol is added in mixture B, after being sufficiently stirred at normal temperatures, 2h is stood at normal temperatures, that is, obtains catalyst.
Embodiment two：
Catalyst component includes 20 parts of nano titanium oxide, 12 parts of diammonium hydrogen phosphate, 10 parts of silicon powder, nano whisker in parts by weight 8 parts of silicon, 12 parts of polyvinyl alcohol, 10 parts of diatomite, 6 parts of nanometer anion powder, 8 parts of nano zine oxide, 12 parts of active carbon nanoparticles.
The preparation method of the present embodiment comprises the following steps：
A, added after mixing silicon powder, nano whisker silicon, diatomite, nanometer anion powder, nano zine oxide, active carbon nanoparticles Ground in grinder, cross 100 mesh sieves afterwards, obtain mixture A；
B, nano titanium oxide, diammonium hydrogen phosphate are added in mixture A, stirring at low speed in stirred tank, stirring are added after mixing Speed is 300 revs/min, mixing time 10min, obtains mixture B；
C, polyvinyl alcohol is added in mixture B, after being sufficiently stirred at normal temperatures, 2h is stood at normal temperatures, that is, obtains catalyst.
Embodiment three：
Catalyst component includes 12 parts of nano titanium oxide, 5 parts of diammonium hydrogen phosphate, 6 parts of silicon powder, nano whisker silicon in parts by weight 3 parts, 6 parts of polyvinyl alcohol, 5 parts of diatomite, 2 parts of nanometer anion powder, 3 parts of nano zine oxide, 6 parts of active carbon nanoparticles.
The preparation method of the present embodiment comprises the following steps：
A, added after mixing silicon powder, nano whisker silicon, diatomite, nanometer anion powder, nano zine oxide, active carbon nanoparticles Ground in grinder, cross 100 mesh sieves afterwards, obtain mixture A；
B, nano titanium oxide, diammonium hydrogen phosphate are added in mixture A, stirring at low speed in stirred tank, stirring are added after mixing Speed is 300 revs/min, mixing time 10min, obtains mixture B；
C, polyvinyl alcohol is added in mixture B, after being sufficiently stirred at normal temperatures, 2h is stood at normal temperatures, that is, obtains catalyst.
Example IV：
Catalyst component includes 18 parts of nano titanium oxide, 10 parts of diammonium hydrogen phosphate, 9 parts of silicon powder, nano whisker in parts by weight 7 parts of silicon, 10 parts of polyvinyl alcohol, 9 parts of diatomite, 5 parts of nanometer anion powder, 7 parts of nano zine oxide, 10 parts of active carbon nanoparticles.
The preparation method of the present embodiment comprises the following steps：
A, added after mixing silicon powder, nano whisker silicon, diatomite, nanometer anion powder, nano zine oxide, active carbon nanoparticles Ground in grinder, cross 100 mesh sieves afterwards, obtain mixture A；
B, nano titanium oxide, diammonium hydrogen phosphate are added in mixture A, stirring at low speed in stirred tank, stirring are added after mixing Speed is 300 revs/min, mixing time 10min, obtains mixture B；
C, polyvinyl alcohol is added in mixture B, after being sufficiently stirred at normal temperatures, 2h is stood at normal temperatures, that is, obtains catalyst.
Embodiment five：
Catalyst component includes 15 parts of nano titanium oxide, 8 parts of diammonium hydrogen phosphate, 8 parts of silicon powder, nano whisker silicon in parts by weight 5 parts, 8 parts of polyvinyl alcohol, 7 parts of diatomite, 3 parts of nanometer anion powder, 5 parts of nano zine oxide, 8 parts of active carbon nanoparticles.
The preparation method of the present embodiment comprises the following steps：
A, added after mixing silicon powder, nano whisker silicon, diatomite, nanometer anion powder, nano zine oxide, active carbon nanoparticles Ground in grinder, cross 100 mesh sieves afterwards, obtain mixture A；
B, nano titanium oxide, diammonium hydrogen phosphate are added in mixture A, stirring at low speed in stirred tank, stirring are added after mixing Speed is 300 revs/min, mixing time 10min, obtains mixture B；
C, polyvinyl alcohol is added in mixture B, after being sufficiently stirred at normal temperatures, 2h is stood at normal temperatures, that is, obtains catalyst.
The catalyst of the present invention can effectively remove the formaldehyde of interior, keep room air pure and fresh；Wherein, it is of the invention Nanometer anion powder, nano zine oxide, the active carbon nanoparticles of middle addition, the different of interior can be removed while formaldehyde is eliminated Taste, anion is discharged, further purifies air, the present invention can be non-stimulated with the biological pollutants such as elimination virus bacterium, product Property smell, without secondary pollution；Obtained through overtesting, after being used 1 month indoors using catalyst produced by the present invention, formaldehyde contains Amount reduces by 95%；, being capable of fully erased formaldehyde after 2 months.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding And modification, the scope of the present invention is defined by the appended.

Claims (3)

1. a kind of indoor formaldehyde removes catalyst, it is characterised in that：Catalyst component includes nano titanium oxide 10-20 in parts by weight Part, diammonium hydrogen phosphate 4-12 parts, silicon powder 5-10 parts, nano whisker silicon 2-8 parts, polyvinyl alcohol 4-12 parts, diatomite 3-10 parts, Nanometer anion powder 1-6 parts, nano zine oxide 2-8 parts, active carbon nanoparticles 4-12 parts.
2. a kind of indoor formaldehyde according to claim 1 removes catalyst, it is characterised in that：The preferable composition of catalyst component is matched somebody with somebody Than including 15 parts of nano titanium oxide, 8 parts of diammonium hydrogen phosphate, 8 parts of silicon powder, 5 parts of nano whisker silicon, 8 parts of polyvinyl alcohol, diatom 7 parts of soil, 3 parts of nanometer anion powder, 5 parts of nano zine oxide, 8 parts of active carbon nanoparticles.
3. realize that a kind of indoor formaldehyde described in claim 1 removes the preparation method of catalyst, it is characterised in that：Its preparation method Comprise the following steps：
A, added after mixing silicon powder, nano whisker silicon, diatomite, nanometer anion powder, nano zine oxide, active carbon nanoparticles Ground in grinder, cross 100 mesh sieves afterwards, obtain mixture A；
B, nano titanium oxide, diammonium hydrogen phosphate are added in mixture A, stirring at low speed in stirred tank, stirring are added after mixing Speed is 300 revs/min, mixing time 10min, obtains mixture B；
C, polyvinyl alcohol is added in mixture B, after being sufficiently stirred at normal temperatures, 2h is stood at normal temperatures, that is, obtains catalyst.
CN201710966904.3A 2017-10-17 2017-10-17 A kind of indoor formaldehyde removes catalyst and preparation method thereof Pending CN107715921A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108854963A (en) * 2018-07-10 2018-11-23 周常 A kind of active carbon and preparation method thereof for formaldehyde adsorption
CN109647332A (en) * 2018-12-08 2019-04-19 英鸿纳米科技股份有限公司 A kind of preparation method of air purification nano-material
CN110339810A (en) * 2018-04-02 2019-10-18 广西大学 A kind of formaldehyde absorbing active carbon and preparation method thereof
CN111282414A (en) * 2020-02-12 2020-06-16 常德集智生物科技有限公司 Green antibacterial sterilization negative oxygen ion releasing powder and preparation method thereof
CN111841279A (en) * 2019-04-26 2020-10-30 美澳视界（厦门）智能科技有限公司 Antibacterial environment-friendly agent capable of removing formaldehyde residues and preparation method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1878573A (en) * 2003-11-14 2006-12-13 出光技优股份有限公司 Deodorant and deodorizing article
CN104437026A (en) * 2014-11-19 2015-03-25 苏州佑君环境科技有限公司 Formaldehyde absorbing scavenging agent and preparation method thereof
CN106221416A (en) * 2016-07-29 2016-12-14 蒋文兰 Silica gel photocatalytic spray liquid can be cleaned

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1878573A (en) * 2003-11-14 2006-12-13 出光技优股份有限公司 Deodorant and deodorizing article
CN104437026A (en) * 2014-11-19 2015-03-25 苏州佑君环境科技有限公司 Formaldehyde absorbing scavenging agent and preparation method thereof
CN106221416A (en) * 2016-07-29 2016-12-14 蒋文兰 Silica gel photocatalytic spray liquid can be cleaned

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110339810A (en) * 2018-04-02 2019-10-18 广西大学 A kind of formaldehyde absorbing active carbon and preparation method thereof
CN108854963A (en) * 2018-07-10 2018-11-23 周常 A kind of active carbon and preparation method thereof for formaldehyde adsorption
CN109647332A (en) * 2018-12-08 2019-04-19 英鸿纳米科技股份有限公司 A kind of preparation method of air purification nano-material
CN111841279A (en) * 2019-04-26 2020-10-30 美澳视界（厦门）智能科技有限公司 Antibacterial environment-friendly agent capable of removing formaldehyde residues and preparation method thereof
CN111282414A (en) * 2020-02-12 2020-06-16 常德集智生物科技有限公司 Green antibacterial sterilization negative oxygen ion releasing powder and preparation method thereof

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Application publication date: 20180223