CN109926022A - A kind of graphene cobalt oxide compound air purification material and preparation method thereof - Google Patents
A kind of graphene cobalt oxide compound air purification material and preparation method thereof Download PDFInfo
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- CN109926022A CN109926022A CN201910235652.6A CN201910235652A CN109926022A CN 109926022 A CN109926022 A CN 109926022A CN 201910235652 A CN201910235652 A CN 201910235652A CN 109926022 A CN109926022 A CN 109926022A
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Abstract
The invention discloses a kind of graphene cobalt oxide compound air purification materials and preparation method thereof, the raw material of the material includes: graphene 0.1%~5%, urea 0.1%~2%, cabaltous nitrate hexahydrate 0.1%~1%, surfactant 0.1%~1%, active carbon 94.5%~99%.The present invention also provides the preparation methods of the material, include: step 1, weighing each raw material in proportion；Step 2, it disperses graphene in the mixed liquor of water and ethyl alcohol；Step 3, it by mixed liquor ultrasonic disperse, is then dried in vacuo and is freeze-dried again；Step 4, product is calcined under nitrogen protection；Step 5, powder is ground by ball mill；Step 6, obtained aqueous solution after grinding is added surfactant, stirs under normal temperature condition；Step 7, active carbon is added, is stirred, drying.Material prepared by the present invention can increase air purifier service life, reduce use cost, have a good application prospect.
Description
Technical field
The present invention relates to a kind of scavenging materials and preparation method thereof, and in particular, to a kind of graphene cobalt oxide compound air
Gas scavenging material and preparation method thereof.
Background technique
Graphene (Graphene) be one kind by carbon atom with sp2Hybridized orbit forms the two dimension that hexangle type is in honeycomb lattice
Carbon nanomaterial.
Graphene has excellent optics, electricity, mechanical characteristic, in materialogy, the energy, biomedicine and drug delivery etc.
Aspect is with important application prospects, it is considered to be a kind of future revolutionary material.
Research and the application and development persistently overheating of graphene, material related with graphene are widely used in battery electrode material
Material, semiconductor devices, transparent display screen, sensor, capacitor, transistor etc..In view of the performance that grapheme material is excellent
And its potential application value, a system has been achieved in numerous ambits such as chemistry, material, physics, biology, environment, the energy
Column impressive progress.Researchers are dedicated to attempting distinct methods in different field in the hope of preparing high quality, large-area graphene material
Material.And by continuing to optimize and improving to graphene preparation process, the material that graphene preparation cost keeps its excellent is reduced
It can be more widely used, and gradually move towards industrialization.
Meanwhile cobalt oxide have excellent catalytic action, such as at room temperature catalysis oxidation formaldehyde, catalytic oxidation of cyclohexane,
Aoxidize the poisonous and harmful substances such as CO.But there is presently no the scavenging materials for combining cobalt oxide with graphene to emerge.
Summary of the invention
The object of the present invention is to provide a kind of composite purification materials and preparation method thereof, are able to solve existing issue, preparation
Scavenging material have preferable detergent power, can increase air purifier service life, reduce use cost, have fine
Application prospect.
In order to achieve the above object, the present invention provides a kind of graphene cobalt oxide compound air purification materials, wherein institute
The raw material for the scavenging material stated includes by mass percentage: graphene 0.1%~5%, urea 0.1%~2%, six hydration nitre
Sour cobalt 0.1%~1%, surfactant 0.1%~1%, active carbon 94.5%~99%.
Above-mentioned graphene cobalt oxide compound air purification material, wherein the graphene be using mechanical stripping method,
Any one of the method preparation of oxidation-reduction method, chemical vapour deposition technique etc..
Above-mentioned graphene cobalt oxide compound air purification material, wherein the surfactant include polyvinyl alcohol,
Polyethylene glycol, sodium lignin sulfonate, polyethylene pyrrole network alkanone (PVP), dodecyl pyrrolidone, dimethylformamide (DMF)
Any one or more in.
The present invention also provides the preparation methods of above-mentioned graphene cobalt oxide compound air purification material, wherein described
Method include: step 1, weigh each raw material in proportion；Step 2, it disperses graphene in the mixed liquor of water and ethyl alcohol；Step
3, then resulting sol form mixed liquor is dried in vacuo by the resulting mixed liquor ultrasonic disperse of step 2, mixed liquor is dry
It is freeze-dried again after to gel；Step 4, the product after step 3 freeze-drying is placed in calcining furnace, is protected in nitrogen
Calcined under shield, after obtain cobalt oxide/graphene powder；Step 5, the resulting graphene/cobalt oxide of step 4 is compound
Powder is ground by ball mill；Step 6, resulting product is configured to graphene/cobalt oxide aqueous solution after grinding, together
When surfactant is added, stirred under normal temperature condition；Step 7, active carbon is added in the resulting mixed liquor of step 6, sufficiently
Stirring, removes excessive moisture, and drying obtains graphene cobalt oxide compound air purification material.
The preparation method of above-mentioned graphene cobalt oxide compound air purification material, wherein in the step 2, dispersion
The mass concentration of graphene in the mixed liquor of water and ethyl alcohol is 1%~10%.
The preparation method of above-mentioned graphene cobalt oxide compound air purification material, wherein in the step 3, will mix
0.5~2h of liquid ultrasonic disperse is closed, then resulting sol form mixed liquor is placed in 40~60 DEG C of vacuum oven dry.
The preparation method of above-mentioned graphene cobalt oxide compound air purification material, wherein, will be cold in the step 4
Be lyophilized it is dry after product be placed in calcining furnace, under nitrogen protection in 300~450 DEG C of temperature conditions calcine 1~3h.
The preparation method of above-mentioned graphene cobalt oxide compound air purification material, wherein in the step 5, by stone
Black alkene/oxidation cobalt composite powder body is ground by ball mill, and milling time is 0.5~2h, graphene/cobalt oxide after grinding
The partial size of composite granule is 3~10 microns.
The preparation method of above-mentioned graphene cobalt oxide compound air purification material, wherein in the step 6, prepare
Graphene/cobalt oxide aqueous solution, while surfactant is added, 20~60min is stirred under normal temperature condition.
The preparation method of above-mentioned graphene cobalt oxide compound air purification material, wherein in the step 7, will live
Property charcoal be added in mixed liquor, be sufficiently stirred 1~2h, remove excessive moisture, drying obtains stone under the conditions of 100~150 DEG C of temperature
Black alkene cobalt oxide compound air purification material.
Graphene cobalt oxide compound air purification material provided by the invention and preparation method thereof has the advantage that
Graphene prepared by the present invention/oxidation cobalt composite material, for active carbon it is compound or individually with other purification materials
Expect compound, has the function of absorption, antibacterial, catalytic decomposition poisonous and harmful substance etc., can be improved absorption and purification efficiency, increase simultaneously
The service life for having grown scavenging material, there is vast market prospect.
Graphene cobalt oxide compound air purification material prepared by the present invention preferentially prepares graphene/cobalt oxide powder, then
Prepare composite activated carbon scavenging material.Its cardinal principle is the specific surface area that graphene has superelevation, makes it have very strong suction
Attached ability can largely adsorb the poisonous and harmful substances such as formaldehyde, sulfur dioxide, nitrogen oxides, the polycyclic aromatic hydrocarbon in air, simultaneously
The presence of cobalt oxide plays the role of catalysis reaction to the decomposition of harmful substance, therefore the scavenging material can be by the nocuousness of absorption
Substance last decomposition can make the scavenging material persistently keep adsorption-decomposition function state, enhance the service life of scavenging material, reduce
Use cost.
Graphene prepared by the present invention/cobalt oxide compound air purification material, simple process is easy to operate, low in cost, warp
Ji high efficiency, is suitble to large-scale industrial production.
Specific embodiment
A specific embodiment of the invention is further described below.
Graphene cobalt oxide compound air purification material provided by the invention, raw material includes by mass percentage: stone
Black alkene 0.1%~5%, urea 0.1%~2%, cabaltous nitrate hexahydrate 0.1%~1%, surfactant 0.1%~1% are living
Property charcoal 94.5%~99%.
Graphene be using mechanical stripping method, oxidation-reduction method, chemical vapour deposition technique etc. method preparation it is any one
Kind.
Surfactant includes polyvinyl alcohol, polyethylene glycol, sodium lignin sulfonate, polyethylene pyrrole network alkanone (PVP), 12
Any one or more in alkyl pyrrolidone, dimethylformamide (DMF) etc..
The present invention also provides the preparation method of the graphene cobalt oxide compound air purification material, it includes:
Step 1, each raw material is weighed in proportion；Step 2, it disperses graphene in the mixed liquor of water and ethyl alcohol；Step 3,
By the resulting mixed liquor ultrasonic disperse of step 2, then resulting sol form mixed liquor is dried in vacuo, mixed liquor is dry extremely
It is freeze-dried again after gel；Step 4, the product after step 3 freeze-drying is placed in calcining furnace, in nitrogen protection
Under calcined, after obtain cobalt oxide/graphene powder；Step 5, by the resulting graphene of step 4/oxidation cobalt composite powder
Body is ground by ball mill；Step 6, resulting product is configured to graphene/cobalt oxide aqueous solution after grinding, simultaneously
Surfactant is added, is stirred under normal temperature condition；Step 7, active carbon is added in the resulting mixed liquor of step 6, is sufficiently stirred
It mixes, removes excessive moisture, drying obtains graphene cobalt oxide compound air purification material.
Preferably, the mass concentration that the graphene in the mixed liquor of water and ethyl alcohol is dispersed in step 2 is 1%~10%.
By mixed liquor 0.5~2h of ultrasonic disperse in step 3, then resulting sol form mixed liquor is placed in 40~60 DEG C of vacuum drying
It is dry in case.The product after freeze-drying is placed in calcining furnace in step 4, under nitrogen protection 300~450 DEG C of temperature strips
1~3h is calcined in part.Graphene/oxidation cobalt composite powder body is ground by ball mill in step 5, milling time 0.5
~2h, graphene/oxidation cobalt composite powder body partial size after grinding are 3~10 microns.Graphene/cobalt oxide is prepared in step 6
Aqueous solution, while surfactant is added, 20~60min is stirred under normal temperature condition.Active carbon is added to mixed liquor in step 7
In, 1~2h is sufficiently stirred, removes excessive moisture, drying obtains graphene cobalt oxide compound air under the conditions of 100~150 DEG C of temperature
Gas scavenging material.
Below with reference to embodiment to graphene cobalt oxide compound air purification material provided by the invention and preparation method thereof
It is further described.
Embodiment 1
A kind of graphene cobalt oxide compound air purification material, raw material includes by mass percentage: graphene
0.1%, urea 0.7%, cabaltous nitrate hexahydrate 0.1%, surfactant 0.1%, active carbon 99%.
Graphene is prepared using mechanical stripping method.
Surfactant includes polyvinyl alcohol and polyethylene glycol.
The present embodiment additionally provides the preparation method of the graphene cobalt oxide compound air purification material, it includes:
Step 1, each raw material is weighed in proportion；
Step 2, it disperses graphene in the mixed liquor of water and ethyl alcohol；The mass concentration of graphene is 1% after dispersion.
Step 3, by the resulting mixed liquor ultrasonic disperse 0.5 of step 2, resulting sol form mixed liquor is then placed in 40 DEG C
Vacuum oven in it is dry, mixed liquor is dry to being freeze-dried after gel again.
Step 4, the product after step 3 freeze-drying is placed in calcining furnace, under nitrogen protection 300 DEG C of temperature conditions
Middle calcining 1h, after obtain cobalt oxide/graphene powder.
Step 5, the resulting graphene of step 4/oxidation cobalt composite powder body is ground by ball mill；Milling time is
0.5h, graphene/oxidation cobalt composite powder body partial size after grinding are 10 microns.
Step 6, resulting product is configured to graphene/cobalt oxide aqueous solution after grinding, while surface-active is added
Agent stirs 20min under normal temperature condition.
Step 7, active carbon is added in the resulting mixed liquor of step 6, is sufficiently stirred 1h, remove excessive moisture, 100 DEG C
Drying obtains graphene cobalt oxide compound air purification material under the conditions of temperature.
Embodiment 2
A kind of graphene cobalt oxide compound air purification material, raw material includes by mass percentage: graphene 1%,
Urea 2%, cabaltous nitrate hexahydrate 1%, surfactant 1%, active carbon 95%.
Graphene is prepared using mechanical stripping method.
Surfactant includes sodium lignin sulfonate.
The present embodiment additionally provides the preparation method of the graphene cobalt oxide compound air purification material, it includes:
Step 1, each raw material is weighed in proportion；
Step 2, it disperses graphene in the mixed liquor of water and ethyl alcohol；The mass concentration of graphene is 3% after dispersion.
Step 3, by the resulting mixed liquor ultrasonic disperse 0.8h of step 2, resulting sol form mixed liquor is then placed in 45
DEG C vacuum oven in it is dry, mixed liquor is dry to being freeze-dried after gel again.
Step 4, the product after step 3 freeze-drying is placed in calcining furnace, under nitrogen protection 350 DEG C of temperature conditions
Middle calcining 1.5h, after obtain cobalt oxide/graphene powder.
Step 5, the resulting graphene of step 4/oxidation cobalt composite powder body is ground by ball mill；Milling time is
0.8h, graphene/oxidation cobalt composite powder body partial size after grinding are 4 microns.
Step 6, resulting product is configured to graphene/cobalt oxide aqueous solution after grinding, while surface-active is added
Agent stirs 30min under normal temperature condition.
Step 7, active carbon is added in the resulting mixed liquor of step 6, is sufficiently stirred 1.2h, remove excessive moisture, 120
Drying obtains graphene cobalt oxide compound air purification material under the conditions of DEG C temperature.
Embodiment 3
A kind of graphene cobalt oxide compound air purification material, raw material includes by mass percentage: graphene 2%,
Urea 1%, cabaltous nitrate hexahydrate 0.3%, surfactant 0.3%, active carbon 96.4%.
Graphene is prepared using oxidation-reduction method.
Surfactant includes polyethylene pyrrole network alkanone (PVP).
The present embodiment additionally provides the preparation method of the graphene cobalt oxide compound air purification material, it includes:
Step 1, each raw material is weighed in proportion；
Step 2, it disperses graphene in the mixed liquor of water and ethyl alcohol；The mass concentration of graphene is 5% after dispersion.
Step 3, by the resulting mixed liquor ultrasonic disperse 1h of step 2, resulting sol form mixed liquor is then placed in 50 DEG C
Vacuum oven in it is dry, mixed liquor is dry to being freeze-dried after gel again.
Step 4, the product after step 3 freeze-drying is placed in calcining furnace, under nitrogen protection 380 DEG C of temperature conditions
Middle calcining 2h, after obtain cobalt oxide/graphene powder.
Step 5, the resulting graphene of step 4/oxidation cobalt composite powder body is ground by ball mill；Milling time is
1h, graphene/oxidation cobalt composite powder body partial size after grinding are 5 microns.
Step 6, resulting product is configured to graphene/cobalt oxide aqueous solution after grinding, while surface-active is added
Agent stirs 40min under normal temperature condition.
Step 7, active carbon is added in the resulting mixed liquor of step 6, is sufficiently stirred 1.5h, remove excessive moisture, 130
Drying obtains graphene cobalt oxide compound air purification material under the conditions of DEG C temperature.
Embodiment 4
A kind of graphene cobalt oxide compound air purification material, raw material includes by mass percentage: graphene
2.5%, urea 1.5%, cabaltous nitrate hexahydrate 0.5%, surfactant 0.4%, active carbon 95.1%.
Graphene is prepared using oxidation-reduction method.
Surfactant includes dodecyl pyrrolidone.
The present embodiment additionally provides the preparation method of the graphene cobalt oxide compound air purification material, it includes:
Step 1, each raw material is weighed in proportion；
Step 2, it disperses graphene in the mixed liquor of water and ethyl alcohol；The mass concentration of graphene is 7% after dispersion.
Step 3, by the resulting mixed liquor ultrasonic disperse 1.5h of step 2, resulting sol form mixed liquor is then placed in 55
DEG C vacuum oven in it is dry, mixed liquor is dry to being freeze-dried after gel again.
Step 4, the product after step 3 freeze-drying is placed in calcining furnace, under nitrogen protection 400 DEG C of temperature conditions
Middle calcining 2.5h, after obtain cobalt oxide/graphene powder.
Step 5, the resulting graphene of step 4/oxidation cobalt composite powder body is ground by ball mill；Milling time is
1.5h, graphene/oxidation cobalt composite powder body partial size after grinding are 8 microns.
Step 6, resulting product is configured to graphene/cobalt oxide aqueous solution after grinding, while surface-active is added
Agent stirs 50min under normal temperature condition.
Step 7, active carbon is added in the resulting mixed liquor of step 6, is sufficiently stirred 1.8h, remove excessive moisture, 140
Drying obtains graphene cobalt oxide compound air purification material under the conditions of DEG C temperature.
Embodiment 5
A kind of graphene cobalt oxide compound air purification material, raw material includes by mass percentage: graphene 5%,
Urea 0.3%, cabaltous nitrate hexahydrate 0.1%, surfactant 0.1%, active carbon 94.5%.
Graphene is prepared using chemical vapour deposition technique.
Surfactant includes dimethylformamide (DMF).
The present embodiment additionally provides the preparation method of the graphene cobalt oxide compound air purification material, it includes:
Step 1, each raw material is weighed in proportion；
Step 2, it disperses graphene in the mixed liquor of water and ethyl alcohol；The mass concentration of graphene is 10% after dispersion.
Step 3, by the resulting mixed liquor ultrasonic disperse 2h of step 2, resulting sol form mixed liquor is then placed in 60 DEG C
Vacuum oven in it is dry, mixed liquor is dry to being freeze-dried after gel again.
Step 4, the product after step 3 freeze-drying is placed in calcining furnace, under nitrogen protection 450 DEG C of temperature conditions
Middle calcining 3h, after obtain cobalt oxide/graphene powder.
Step 5, the resulting graphene of step 4/oxidation cobalt composite powder body is ground by ball mill；Milling time is
2h, graphene/oxidation cobalt composite powder body partial size after grinding are 3 microns.
Step 6, resulting product is configured to graphene/cobalt oxide aqueous solution after grinding, while surface-active is added
Agent stirs 60min under normal temperature condition.
Step 7, active carbon is added in the resulting mixed liquor of step 6, is sufficiently stirred 2h, remove excessive moisture, 150 DEG C
Drying obtains graphene cobalt oxide compound air purification material under the conditions of temperature.
Graphene cobalt oxide compound air purification material provided by the invention and preparation method thereof, wherein graphene has excellent
Different absorption property, can adsorb a large amount of harmful substances, such as formaldehyde, sulfur dioxide, nitrogen oxides, polycyclic aromatic hydrocarbon are poisonous and harmful
Gas and load particulate matter；And cobalt oxide has preferable catalysis response function, the venomous injurant that graphene can be made to adsorb
Matter is decomposed, while screening suitable active carbon is carrier, can preferably enhance the catalytic action of cobalt oxide.Meanwhile stone
The excellent performance of black alkene itself and the synergistic effect between nano particle have cobalt compound/graphene composite material more
Add efficient catalytic efficiency.This scavenging material has preferable detergent power, increases air purifier service life, and reduction makes
With cost, have a good application prospect.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of graphene cobalt oxide compound air purification material, which is characterized in that the raw material of the scavenging material presses quality
Percentages include: graphene 0.1%~5%, urea 0.1%~2%, cabaltous nitrate hexahydrate 0.1%~1%, surface-active
Agent 0.1%~1%, active carbon 94.5%~99%.
2. graphene cobalt oxide compound air purification material as described in claim 1, which is characterized in that the graphene is
Any one prepared using the method for mechanical stripping method, oxidation-reduction method, chemical vapour deposition technique.
3. graphene cobalt oxide compound air purification material as described in claim 1, which is characterized in that the surface-active
Agent includes polyvinyl alcohol, polyethylene glycol, sodium lignin sulfonate, polyethylene pyrrole network alkanone, dodecyl pyrrolidone, dimethyl methyl
Any one or more in amide.
4. a kind of preparation side of the graphene cobalt oxide compound air purification material as described in any one of claims 1 to 3
Method, which is characterized in that the method includes:
Step 1, each raw material is weighed in proportion；
Step 2, it disperses graphene in the mixed liquor of water and ethyl alcohol；
Step 3, by the resulting mixed liquor ultrasonic disperse of step 2, then resulting sol form mixed liquor is dried in vacuo, will mixed
It is freeze-dried again after closing liquid drying to gel；
Step 4, the product after step 3 freeze-drying is placed in calcining furnace, is calcined under nitrogen protection, after
To cobalt oxide/graphene powder；
Step 5, the resulting graphene of step 4/oxidation cobalt composite powder body is ground by ball mill；
Step 6, resulting product is configured to graphene/cobalt oxide aqueous solution after grinding, while surfactant is added, often
It is stirred under the conditions of temperature；
Step 7, active carbon is added in the resulting mixed liquor of step 6, is sufficiently stirred, remove excessive moisture, drying obtains stone
Black alkene cobalt oxide compound air purification material.
5. the preparation method of graphene cobalt oxide compound air purification material as claimed in claim 4, which is characterized in that described
Step 2 in, be dispersed in the graphene in the mixed liquor of water and ethyl alcohol mass concentration be 1%~10%.
6. the preparation method of graphene cobalt oxide compound air purification material as claimed in claim 4, which is characterized in that described
Step 3 in, by mixed liquor 0.5~2h of ultrasonic disperse, then resulting sol form mixed liquor is placed in 40~60 DEG C of vacuum
It is dry in drying box.
7. the preparation method of graphene cobalt oxide compound air purification material as claimed in claim 4, which is characterized in that described
Step 4 in, the product after freeze-drying is placed in calcining furnace, is forged in 300~450 DEG C of temperature conditions under nitrogen protection
Burn 1~3h.
8. the preparation method of graphene cobalt oxide compound air purification material as claimed in claim 4, which is characterized in that described
Step 5 in, graphene/oxidation cobalt composite powder body is ground by ball mill, milling time be 0.5~2h, after grinding
Graphene/oxidation cobalt composite powder body partial size be 3~10 microns.
9. the preparation method of graphene cobalt oxide compound air purification material as claimed in claim 4, which is characterized in that described
Step 6 in, prepare graphene/cobalt oxide aqueous solution, while surfactant be added, 20~60min is stirred under normal temperature condition.
10. the preparation method of graphene cobalt oxide compound air purification material as claimed in claim 4, which is characterized in that institute
In the step 7 stated, active carbon is added in mixed liquor, 1~2h is sufficiently stirred, removes excessive moisture, 100~150 DEG C of temperature
Under the conditions of drying obtain graphene cobalt oxide compound air purification material.
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Application publication date: 20190625 |
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