CN101579561A - Method for applying cobalt oxide catalyst with nano structure in catalytic oxidation reaction of formaldehyde at low room temperature - Google Patents
Method for applying cobalt oxide catalyst with nano structure in catalytic oxidation reaction of formaldehyde at low room temperature Download PDFInfo
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- CN101579561A CN101579561A CNA2009100874353A CN200910087435A CN101579561A CN 101579561 A CN101579561 A CN 101579561A CN A2009100874353 A CNA2009100874353 A CN A2009100874353A CN 200910087435 A CN200910087435 A CN 200910087435A CN 101579561 A CN101579561 A CN 101579561A
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- formaldehyde
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- cobalt oxide
- catalytic oxidation
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Abstract
The invention relates to a method for applying a cobalt oxide catalyst with nano structure in complete catalytic oxidation reaction of formaldehyde at low room temperature, comprising the conditions: the catalyst is cobalt oxide with the nano structure (nano cobalt oxide is catalytic activity phase), and can be added with accessory ingredient(s) which can one or more of noble metal and rare earth oxide; the concentration of the formaldehyde is 1.5-2000ppm; the temperature range of the catalytic oxidation reaction of the formaldehyde is -15 to 45 DEG C. The method utilizes the catalytic oxidation of the cobalt oxide catalyst with the nano structure on the formaldehyde to lead formaldehyde gas with certain concentration to be completely oxidized to generate carbon dioxide and water at low room temperature, thus being used for removing the formaldehyde in local environment (air purification in a room and a car) and ensuring the concentration of the formaldehyde to be lowered below 1.5ppm to reach the range being safe to the human body.
Description
Technical field
The present invention relates to the application of cobalt oxide catalyst with nano structure, particularly relate to the application of cobalt oxide catalyst with nano structure in the complete catalytic oxidation of formaldehyde at low room temperature.
Background technology
Formaldehyde has another name called formaldehyde, is a kind of colourless gas that penetrating odor is arranged.Formaldehyde is to the harm of the person, along with being extensive use of of finishing material is more and more serious.Long-term contact low dosage formaldehyde can cause chronic respiratory disease, pregnancy syndrome, cause that neonate's system reduces, deformity, even cause nasal cavity, oral cavity, throat, skin and alimentary tract cancer.High-concentration formaldehyde is all toxic to immune system, nervous system, liver etc.
In the room of fitting up, market, hotel, the office, because finishing and furniture manufacturing will be used a large amount of wood-based plates, need to use in a large number the high formaldehyde of toxicity to be the adhesive of raw material manufacturing and produce wood-based plate, because the formaldehyde release period in the adhesive generally reaches 15 years, cause formaldehyde to become major pollutants in the room air.Automotive trim generally uses plastics and binder, and formaldehyde pollutes and is difficult for avoiding, and this type of pollution just can fade away after vehicle uses about 1 year.
The way of removing formaldehyde at present has: keep room ventilation, and charcoal absorption, plant is assisted absorption process, photocatalytic method.The defective of active carbon, the auxiliary absorption process of plant is apparent.Photocatalytic method needs that extra light source, catalytic activity are low, retention time is very short, might be used for the closed circulation system of low concentration, inapplicable mobile phase gas purification system with certain air speed.Yet the method for the most effective thorough elimination formaldehyde is: the room temperature heat catalytic oxidation is eliminated.The formaldehyde through catalytic oxidation catalyst of having reported mostly is noble metal catalyst, and noble metal catalyst costs an arm and a leg, and stability and reappearance are all relatively poor, also is difficult to mass preparation.
Summary of the invention
The objective of the invention is to cobalt oxide catalyst with nano structure is applied to the complete catalysts oxidation reaction of formaldehyde under the low room temperature, a kind of catalysis material take non-noble metal oxide as Catalytic active phase that can remove formaldehyde under low room temperature is provided, this catalysis material can be applied to the removal of formaldehyde in indoor and the car.
For achieving the above object, technical solution of the present invention provides a kind of catalysis material of nanostructured, under low room temperature condition, certain density formaldehyde complete oxidation is generated carbon dioxide and water, reach and reduce concentration of formaldehyde to purpose to human body safe concentration scope.
Described method, its described catalyst are the Co of nanostructured
3O
4
Described method, the concentration of its described formaldehyde is: 1.5-2000ppm
Described method, the range of reaction temperature of its described formaldehyde through catalytic oxidation reaction is :-15-45 ℃.
The present invention adopts cobalt oxide catalyst with nano structure, also can add in noble metal or the rare earth oxide one or more as auxiliary agent.
The specific embodiment
Under the embodiment 1:25 ℃ condition, the Co of coprecipitation method preparation
3O
4Nanometer sheet catalyst (the transmission electron microscope phenogram is seen Fig. 1), but the formaldehyde 20% of catalyzed conversion 200ppm
Adopt U-shaped pipe (internal diameter 4mm) continuous-flow reaction evaluating device, weighing 100mg Co
3O
4In the nanometer sheet catalyst disposed tubes, the flow velocity of regulating air is 40mlmin
-1, the mobile formaldehyde gas that drives of air enters in the U-shaped pipe reactor, makes its air speed reach 55000h
-1Under 25 ℃ of conditions, this Co
3O
4It is carbon dioxide and water that catalyst can make the formaldehyde gas complete oxidation of 20% 200ppm.
Under the embodiment 2:0 ℃ condition, the Co of the two-dimensional nano pore structure of hard template method preparation
3O
4Catalyst (the transmission electron microscope phenogram is seen Fig. 2) can be got rid of the formaldehyde 50% of 10ppm
The Co of hard template method two-dimensional nano pore structure
3O
4The preparation of catalyst is with the presoma Co (NO of pure dissolved cobalt
3)
26H
2Behind the O, add the hard template SBA-15 of two-dimensional structure, dry after stirring a period of time, roasting is removed hard template with a certain amount of NaOH aqueous solution dissolving afterwards, thereby is made the Co of two-dimensional structure
3O
4Catalyst.Adopt U-shaped pipe (internal diameter 4mm) continuous-flow reaction evaluating device, the Co of weighing 100mg two-dimensional nano pore structure
3O
4In the catalyst disposed tubes, the flow velocity of regulating air is 40mlmin
-1, the mobile formaldehyde gas that drives of air enters in the U-shaped pipe reactor, makes its air speed reach 55000h
-1Under 0 ℃ of condition, this Co
3O
4It is carbon dioxide and water that catalyst can make the formaldehyde gas complete oxidation of 50% 10ppm.
Under the embodiment 3:0 ℃ condition, the Co of soft template method preparation
3O
4The nanometer rods catalyst can be got rid of the formaldehyde 60% of 10ppm
Co
3O
4The preparation of nanometer rods catalyst mixes with ethylene glycol solution cobalt acetate under 150 ℃, add afterwards a certain amount of aqueous sodium carbonate, obtains Co in the air after the roasting
3O
4Nanometer rods.Adopt U-shaped pipe (internal diameter 4mm) continuous-flow reaction evaluating device, weighing 100mg Co
3O
4In the nanometer rods catalyst disposed tubes, the flow velocity of regulating air is 40mlmin
-1, the mobile formaldehyde gas that drives of air enters in the U-shaped pipe reactor, makes its air speed reach 55000h
-1Under 0 ℃ of condition, this Co
3O
4It is carbon dioxide and water that catalyst can make the formaldehyde gas complete oxidation of 60% 10ppm.
Under the embodiment 4:25 ℃ condition, to the Co of the two-dimensional nano pore structure of hard template method preparation
3O
4Add golden auxiliary agent in the catalyst, wherein the content of gold is 1%, this Au/Co
3O
4But the formaldehyde of catalyst complete oxidation 200ppm
The Au/Co of hard template method two-dimensional nano pore structure
3O
4The preparation of catalyst is with the presoma Co (NO of pure dissolved cobalt and gold
3)
26H
2O and HAuCl
4After, the hard template SBA-15 of adding two-dimensional structure, dry after stirring a period of time, roasting is removed hard template with a certain amount of NaOH aqueous solution dissolving afterwards, thereby is made the Au/Co of two-dimensional structure
3O
4Catalyst.Adopt U-shaped pipe (internal diameter 4mm) continuous-flow reaction evaluating device, weighing 100mgAu/Co
3O
4In the catalyst disposed tubes, the flow velocity of regulating air is 40mlmin
-1, the mobile formaldehyde gas that drives of air enters in the U-shaped pipe reactor, makes its air speed reach 55000h
-1Under 25 ℃ of conditions, this Au/Co
3O
4It is carbon dioxide and water that catalyst can make the formaldehyde gas complete oxidation of 100% 200ppm.
Under the embodiment 5:35 ℃ condition, the Co of the three-dimensional manometer pore structure of hard template method preparation
3O
4-CeO
2Catalyst (the transmission electron microscope phenogram is seen Fig. 3) can transform the formaldehyde 70% of 100ppm
The Co of hard template method three-dimensional manometer pore structure
3O
4-CeO
2The preparation of catalyst is with the presoma Co (NO of pure dissolved cobalt and cerium
3)
26H
2O and Ce (NO
3)
37H
2Behind the O, add the hard template KIT-6 of three-dimensional structure, dry after stirring a period of time, roasting is removed hard template with a certain amount of NaOH aqueous solution dissolving afterwards, thereby is made the Co of three-dimensional structure
3O
4-CeO
2Catalyst.Adopt U-shaped pipe (internal diameter 4mm) continuous-flow reaction evaluating device, weighing 100mg Co
3O
4-CeO
2In the catalyst disposed tubes, the flow velocity of regulating air is 40mlmin
-1, the mobile formaldehyde gas that drives of air enters in the U-shaped pipe reactor, makes its air speed reach 55000h
-1Under 35 ℃ of conditions, this Co
3O
4-CeO
2It is carbon dioxide and water that catalyst can make the formaldehyde gas complete oxidation of 70% 100ppm.
Under the embodiment 6:-5 ℃ condition, the Co of the three-dimensional manometer pore structure of hard template method preparation
3O
4Catalyst can transform the formaldehyde 30% of 10ppm
The Co of hard template method three-dimensional manometer pore structure
3O
4The preparation of catalyst is with pure dissolved cobalt presoma Co (NO
3)
26H
2Behind the O, add the hard template KIT-6 of three-dimensional structure, dry after stirring a period of time, roasting is removed hard template with a certain amount of NaOH aqueous solution dissolving afterwards, thereby is made the Co of three-dimensional structure
3O
4Catalyst.Adopt U-shaped pipe (internal diameter 4mm) continuous-flow reaction evaluating device, weighing 100mg Co
3O
4-CeO
2In the catalyst disposed tubes, the flow velocity of regulating air is 40mlmin
-1, the mobile formaldehyde gas that drives of air enters in the U-shaped pipe reactor, makes its air speed reach 55000h
-1Under-5 ℃ of conditions, it is carbon dioxide and water that this catalyst can make the formaldehyde gas complete oxidation of 30% 10ppm.
Description of drawings
Fig. 1: synthesize Co
3O
4The transmission electron microscope phenogram of nanometer sheet catalyst.
Fig. 2: synthetic two-dimensional nano pore structure Co
3O
4The transmission electron microscope phenogram of catalyst.
Fig. 3: synthetic three-D nano structure C o
3O
4-CeO
2The transmission electron microscope phenogram of catalyst.
Claims (4)
1, the present invention relates to a kind of in catalytic oxidation reaction of formaldehyde at low room temperature the method for applying cobalt oxide catalyst with nano structure; Wherein: the Activity Phase of catalyst is the Co of nanostructured
3O
4, also can in catalyst, add auxiliary agent.
2, the method for claim 1 is characterized in that, nanostructured Co
3O
4Content be 1-100%.
3, the method for claim 1 is characterized in that, the concentration of formaldehyde is 1.5-2000ppm.
4, the method for claim 1 is characterized in that, the range of reaction temperature of formaldehyde through catalytic oxidation reaction is-and 15-45 ℃.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100874353A CN101579561B (en) | 2009-06-25 | 2009-06-25 | Method for applying cobalt oxide catalyst with nano structure in catalytic oxidation reaction of formaldehyde at low room temperature |
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|---|---|---|---|
| CN2009100874353A CN101579561B (en) | 2009-06-25 | 2009-06-25 | Method for applying cobalt oxide catalyst with nano structure in catalytic oxidation reaction of formaldehyde at low room temperature |
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| CN101579561B CN101579561B (en) | 2011-05-04 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157491A (en) * | 2011-12-12 | 2013-06-19 | 中国科学院生态环境研究中心 | Mesoporous metal oxide-supported palladium catalyst used for catalytic oxidation of volatile organic compounds |
| CN104353465A (en) * | 2014-11-18 | 2015-02-18 | 上海应用技术学院 | Catalyst for formaldehyde catalytic oxidation and preparation method of catalyst |
| CN107185553A (en) * | 2017-06-20 | 2017-09-22 | 浙江明华空气净化科技有限公司 | A kind of catalysis oxidation at room temperature removes catalyst of formaldehyde and preparation method thereof |
| CN108283928A (en) * | 2018-01-12 | 2018-07-17 | 齐齐哈尔大学 | Nucleocapsid Co3O4-CeO2@Fe3O4 in-situ preparation methods |
| CN110090643A (en) * | 2019-05-28 | 2019-08-06 | 辽宁大学 | A kind of composite material Bi of room temperature degradation gaseous pollutant2O3-Co3O4Preparation method and application |
| CN111330579A (en) * | 2020-03-04 | 2020-06-26 | 辽宁大学 | Mesoporous composite material Fe3O4-Co3O4Preparation method thereof and application thereof in degrading gaseous pollutants |
| CN113441167A (en) * | 2021-07-09 | 2021-09-28 | 武汉工程大学 | Cobalt oxide nanorod NO oxidation catalyst and preparation method and application thereof |
Family Cites Families (4)
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| US7291315B2 (en) * | 2003-09-25 | 2007-11-06 | Carrier Corporation | System to enhance the photocatalytic oxidation rate of contaminants through selective desorption of water utilizing microwaves |
| CN1321722C (en) * | 2005-04-21 | 2007-06-20 | 内蒙古大学 | Supported nano gold catalyst for clearing formaldehyde from indoor air and method for preparing the same |
| CN101274281B (en) * | 2007-03-16 | 2011-06-15 | 苏州工业园区安泽汶环保技术有限公司 | Room temperature catalyst for removing formaldehyde in air and method of preparing the same |
| CN100471633C (en) * | 2008-02-18 | 2009-03-25 | 王秀宝 | Method for preparing wood printing window shutter formaldehyde-absorbing window curtain |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157491A (en) * | 2011-12-12 | 2013-06-19 | 中国科学院生态环境研究中心 | Mesoporous metal oxide-supported palladium catalyst used for catalytic oxidation of volatile organic compounds |
| CN103157491B (en) * | 2011-12-12 | 2016-08-10 | 中国科学院生态环境研究中心 | One is used for being catalyzed voloxidation organic mesopore metal oxide loaded palladium catalyst |
| CN104353465A (en) * | 2014-11-18 | 2015-02-18 | 上海应用技术学院 | Catalyst for formaldehyde catalytic oxidation and preparation method of catalyst |
| CN104353465B (en) * | 2014-11-18 | 2016-08-24 | 上海应用技术学院 | A kind of catalyst used by formaldehyde through catalytic oxidation and preparation method thereof |
| CN107185553A (en) * | 2017-06-20 | 2017-09-22 | 浙江明华空气净化科技有限公司 | A kind of catalysis oxidation at room temperature removes catalyst of formaldehyde and preparation method thereof |
| CN108283928A (en) * | 2018-01-12 | 2018-07-17 | 齐齐哈尔大学 | Nucleocapsid Co3O4-CeO2@Fe3O4 in-situ preparation methods |
| CN110090643A (en) * | 2019-05-28 | 2019-08-06 | 辽宁大学 | A kind of composite material Bi of room temperature degradation gaseous pollutant2O3-Co3O4Preparation method and application |
| CN110090643B (en) * | 2019-05-28 | 2021-06-01 | 辽宁大学 | Composite material Bi for degrading gaseous pollutants at room temperature2O3-Co3O4Preparation method and application of |
| CN111330579A (en) * | 2020-03-04 | 2020-06-26 | 辽宁大学 | Mesoporous composite material Fe3O4-Co3O4Preparation method thereof and application thereof in degrading gaseous pollutants |
| CN111330579B (en) * | 2020-03-04 | 2022-07-19 | 辽宁大学 | Mesoporous composite material Fe3O4-Co3O4Preparation method thereof and application thereof in degrading gaseous pollutants |
| CN113441167A (en) * | 2021-07-09 | 2021-09-28 | 武汉工程大学 | Cobalt oxide nanorod NO oxidation catalyst and preparation method and application thereof |
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| CN101579561B (en) | 2011-05-04 |
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