CN107670641B - Graphene air purification material and preparation method thereof - Google Patents
Graphene air purification material and preparation method thereof Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 44
- 238000004887 air purification Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 title abstract description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 35
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 30
- 239000002023 wood Substances 0.000 claims abstract description 29
- 239000002131 composite material Substances 0.000 claims abstract description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 17
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 15
- 238000006722 reduction reaction Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000011265 semifinished product Substances 0.000 claims abstract description 6
- 239000003513 alkali Substances 0.000 claims abstract description 5
- 230000003213 activating effect Effects 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 14
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- 239000006185 dispersion Substances 0.000 claims description 11
- 230000004913 activation Effects 0.000 claims description 10
- 229920000877 Melamine resin Polymers 0.000 claims description 8
- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims description 8
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical group NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 4
- 239000000920 calcium hydroxide Substances 0.000 claims description 4
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 2
- 229910021529 ammonia Inorganic materials 0.000 claims description 2
- 239000002585 base Substances 0.000 claims description 2
- 239000004202 carbamide Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 241000894006 Bacteria Species 0.000 abstract description 2
- 239000013078 crystal Substances 0.000 abstract description 2
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000001954 sterilising effect Effects 0.000 abstract description 2
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 24
- 239000003610 charcoal Substances 0.000 description 18
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 12
- 238000001816 cooling Methods 0.000 description 12
- 230000007935 neutral effect Effects 0.000 description 12
- 238000005406 washing Methods 0.000 description 12
- 239000003570 air Substances 0.000 description 9
- 239000008367 deionised water Substances 0.000 description 6
- 229910021641 deionized water Inorganic materials 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 6
- 231100000719 pollutant Toxicity 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 238000010992 reflux Methods 0.000 description 6
- 238000001694 spray drying Methods 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 5
- 239000011941 photocatalyst Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- 239000003463 adsorbent Substances 0.000 description 2
- 230000034994 death Effects 0.000 description 2
- 231100000517 death Toxicity 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- -1 small molecule nitrogen-containing compound Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009423 ventilation Methods 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
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Carbon And Carbon Compounds (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention belongs to the field of air purification materials, and particularly relates to a graphene air purification material and a preparation method thereof. The method comprises the following steps: A) mixing the wood activated carbon powder activated by water vapor with alkali, and activating to obtain an activated carbon semi-finished product; B) and mixing the semi-finished product of the activated carbon obtained in the step with the calcium carbonate crystal whisker, the nitrogen source and the graphene solution again, and carrying out reduction reaction to obtain the graphene super air-purifying composite material. The material of the invention has the functions of adsorbing harmful gas and peculiar smell, inhibiting bacteria and sterilizing, and has the advantages of low production cost and no pollution.
Description
Technical Field
The invention belongs to the field of air purification materials, and particularly relates to a graphene air purification material and a preparation method thereof.
Background
In recent years, the problem of air pollution is always a problem to be solved urgently by governments. The flue gas released by burning fossil fuel (coal, petroleum, natural gas, etc.) in energy, chemical, metallurgy, traffic, etc. industries contains a great deal of SO2And NOxCausing serious pollution to the atmosphere. In addition, various dusts generated by human activities, solid suspended particles such as sand dust caused by climate deterioration, and the like pollute the ambient air, and volatile organic pollutants from various decorative materials and oral chemicals increasingly enter residences and public buildings, so that the degree of pollution of human living environment is increased sharply.
Investigation shows that 90% of newly-installed living rooms and 95% of newly-installed office places in China have the phenomenon that VOCs gas pollutants exceed standards. Since most human activities are performed indoors, the harm to human health and population quality caused by indoor environmental pollution is very serious. One statistic of the world health organization shows that the burden of diseases caused by indoor environmental pollution is 6 times more than that caused by outdoor pollution of the same level. In the nineties of the last century, the number of excess deaths caused by indoor environmental pollution in China is 11 million, the number of excess outpatients is 13 million, and the number of excess emergency calls is 150 million, so that the economic loss caused by the excess of the death is over 100 hundred million dollars.
In order to meet the requirements of people on air quality, various types of air purifiers appear on the market, the currently recognized air purification method at home and abroad mainly utilizes an adsorption method and an electrostatic method to remove pollutants, most of the existing air purifiers adopt a filtering material to remove suspended particles in the air, adopt porous materials such as activated carbon and the like to adsorb harmful gases in the air, and are provided with a negative ion generator to generate a certain amount of negative ions. However, the adsorption capacity of the activated carbon is limited, and the contaminant penetration phenomenon occurs after the adsorption is saturated. And the effect of removing main indoor pollutants such as formaldehyde, acetaldehyde, benzene, VOCs and nitrogen oxides is not ideal. At this time, the adsorbing material loses the adsorption property to the pollutant, and when the adsorbed pollutant is a volatile organic compound, the adsorbed harmful pollutant causes secondary pollution, and becomes a new pollution source.
At present, the research on purifying indoor air by utilizing a nano photocatalyst technology is started at home and abroad. The nano photocatalyst is combined with the adsorbent, and the indoor air can be purified by utilizing the adsorption performance of the adsorbent and the characteristic that the nano photocatalyst can decompose harmful gas into harmless gas at normal temperature. Such as: active carbon or active carbon fiber is used as the carrier of photocatalyst to prepare purifying material, etc. However, since such a photocatalytic effect can only be exerted under the irradiation of ultraviolet light, the material manufactured by the method has poor practicability at present, the indoor environment is difficult to meet the use requirement of an ultraviolet illumination strip, and the cost is high.
Disclosure of Invention
The invention aims to provide a graphene air purification composite material and a preparation method thereof aiming at the defects of the prior art; the composite material has strong air purifying capacity, simple preparation method and low cost, and has good application prospect.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the preparation method of the graphene super air purification composite material comprises the following steps:
A) mixing the wood activated carbon powder activated by water vapor with alkali, and activating to obtain an activated carbon semi-finished product; preparing 0.6 wt% graphene aqueous dispersion;
B) and mixing the semi-finished product of the activated carbon obtained in the step with the calcium carbonate crystal whisker, the nitrogen source and the graphene solution again, and carrying out reduction reaction to obtain the graphene super air-purifying composite material.
Preferably, the base comprises one or more of potassium hydroxide, sodium hydroxide and calcium hydroxide;
the mass ratio of the wood activated carbon powder to the alkali is 1: (0.5-2).
Preferably, the activation temperature is 500-800 ℃, and the activation time is 0.5-4 h.
Preferably, the particle size of the wood activated carbon powder is 8-12 μm; the length of the calcium carbonate whisker is 20-30 μm; the diameter is 1-2 μm; the average sheet diameter of the graphene is 1-50 mu m;
the mass of the graphene in the graphene aqueous dispersion liquid accounts for 0.1-10% of the mass of the wood activated carbon powder.
The mass of the calcium carbonate whiskers accounts for 0.1-10% of the mass of the wood activated carbon powder.
Preferably, the reduction reaction is specifically: carrying out reduction reaction under the condition of protective gas;
the protective gas comprises one or more of hydrogen, ammonia and nitrogen;
the temperature of the reduction reaction is 650-800 ℃, and the time of the reduction reaction is 1-6 h.
Preferably, the nitrogen source is a small molecule nitrogen-containing compound (nitrogen-containing small molecule), more preferably melamine and/or urea;
the mass of the nitrogen source accounts for 1-3% of the mass of the activated carbon powder.
The invention has the following remarkable advantages:
(1) according to the invention, the graphene is attached to the surface of the calcium carbonate whisker by adding the calcium carbonate whisker, so that the graphene is dispersed more uniformly, the specific surface area is increased, and the functions of adsorbing pollution gas and purifying air of the graphene are optimized and improved.
(2) The material of the invention has the functions of adsorbing harmful gas and peculiar smell, inhibiting bacteria and sterilizing, and has the advantages of low production cost and no pollution.
Detailed Description
For further disclosure, but not limitation, the present invention is described in further detail below with reference to examples.
Example 1
Taking 100g of wood charcoal and crushing the wood charcoal to 8-12 mu m; dissolving 50g of sodium hydroxide in 50mL of water, uniformly mixing with the wood charcoal, and drying under vacuum; then adding the materials into an activation furnace protected by nitrogen, heating to 780 ℃ at the speed of 5 ℃/min and keeping for 2 hours; cooling to room temperature, washing the activated product to be neutral, adding 6M hydrochloric acid, refluxing for 2h, and washing with deionized water again to be neutral; adding 4g of calcium carbonate whiskers and 300 mL0.6wt% graphene aqueous dispersion, adding 2g of melamine, ultrasonically stirring for 1h, and then spray-drying; placing the materials in a reduction furnace, heating to 800 ℃ at a speed of 10 ℃/min under the protection of hydrogen, and keeping for 2 hours; and cooling to room temperature to obtain the graphene super air purification composite material.
Example 2
Taking 100g of wood charcoal and crushing the wood charcoal to 8-12 um; dissolving 100g of sodium hydroxide in 100mL of water, uniformly mixing with the wood charcoal, and drying under vacuum; then adding the materials into an activation furnace protected by nitrogen, heating to 780 ℃ at the speed of 5 ℃/min and keeping for 2 hours; cooling to room temperature, washing the activated product to be neutral, adding 6M hydrochloric acid, refluxing for 2h, and washing with deionized water again to be neutral; adding 4g of calcium carbonate whiskers and 300 mL0.6wt% graphene aqueous dispersion, adding 2g of melamine, ultrasonically stirring for 1h, and then spray-drying; placing the materials in a reduction furnace, heating to 800 ℃ at a speed of 10 ℃/min under the protection of hydrogen, and keeping for 2 hours; and cooling to room temperature to obtain the graphene super air purification composite material.
Example 3
Taking 100g of wood charcoal and crushing the wood charcoal to 8-12 mu m; dissolving 50g of potassium hydroxide in 50mL of water, uniformly mixing with the wood charcoal, and drying under vacuum; then adding the materials into an activation furnace protected by nitrogen, heating to 780 ℃ at the speed of 5 ℃/min and keeping for 2 hours; cooling to room temperature, washing the activated product to be neutral, adding 6M hydrochloric acid, refluxing for 2h, and washing with deionized water again to be neutral; adding 4g of calcium carbonate whiskers and 300 mL0.6wt% graphene aqueous dispersion, adding 2g of melamine, ultrasonically stirring for 1h, and then spray-drying; placing the materials in a reduction furnace, heating to 800 ℃ at a speed of 10 ℃/min under the protection of hydrogen, and keeping for 2 hours; and cooling to room temperature to obtain the graphene super air purification composite material.
Example 4
Taking 100g of wood charcoal and crushing the wood charcoal to 8-12 um; dissolving 100g of potassium hydroxide in 100mL of water, uniformly mixing with the wood charcoal, and drying under vacuum; then adding the materials into an activation furnace protected by nitrogen, heating to 780 ℃ at the speed of 5 ℃/min and keeping for 2 hours; cooling to room temperature, washing the activated product to be neutral, adding 6M hydrochloric acid, refluxing for 2h, and washing with deionized water again to be neutral; adding 4g of calcium carbonate whiskers and 300 mL0.6wt% graphene aqueous dispersion, adding 2g of melamine, ultrasonically stirring for 1h, and then spray-drying; placing the materials in a reduction furnace, heating to 800 ℃ at a speed of 10 ℃/min under the protection of hydrogen, and keeping for 2 hours; and cooling to room temperature to obtain the graphene super air purification composite material.
Example 5
Taking 100g of wood charcoal and crushing the wood charcoal to 8-12 mu m; dissolving 50g of calcium hydroxide in 50mL of water, uniformly mixing with the wood charcoal, and drying under vacuum; then adding the materials into an activation furnace protected by nitrogen, heating to 780 ℃ at the speed of 5 ℃/min and keeping for 2 hours; cooling to room temperature, washing the activated product to be neutral, adding 6M hydrochloric acid, refluxing for 2h, and washing with deionized water again to be neutral; adding 4g of calcium carbonate whiskers and 300 mL0.6wt% graphene aqueous dispersion, adding 2g of melamine, ultrasonically stirring for 1h, and then spray-drying; placing the materials in a reduction furnace, heating to 800 ℃ at a speed of 10 ℃/min under the protection of hydrogen, and keeping for 2 hours; and cooling to room temperature to obtain the graphene super air purification composite material.
Example 6
Taking 100g of wood charcoal and crushing the wood charcoal to 8-12 um; dissolving 100g of calcium hydroxide in 100mL of water, uniformly mixing with the wood charcoal, and drying under vacuum; then adding the materials into an activation furnace protected by nitrogen, heating to 780 ℃ at the speed of 5 ℃/min and keeping for 2 hours; cooling to room temperature, washing the activated product to be neutral, adding 6M hydrochloric acid, refluxing for 2h, and washing with deionized water again to be neutral; adding 4g of calcium carbonate whiskers and 300 mL0.6wt% graphene aqueous dispersion, adding 2g of melamine, ultrasonically stirring for 1h, and then spray-drying; placing the materials in a reduction furnace, heating to 800 ℃ at a speed of 10 ℃/min under the protection of hydrogen, and keeping for 2 hours; and cooling to room temperature to obtain the graphene super air purification composite material.
The performance test of the purification material of the invention comprises the following steps: 3.5 mg of formaldehyde and 3.5 mg of toluene were added to a closed space of 1 cubic meter. The volatile matter is evenly volatilized by micro ventilation. 50g of the sample is uniformly spread at four corners of a space, formaldehyde in the space is detected every 1 hour after 6 hours, the content of toluene is 0.048 mg of formaldehyde, the content of toluene is 0.107 mg of toluene, the contents of toluene and toluene are respectively lower than 0.10 mg of formaldehyde and 0.20 mg of toluene, the removal rates of the toluene and the formaldehyde are respectively 98.6 percent and 96.9 percent.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (8)
1. A preparation method of a graphene air purification composite material is characterized by comprising the following steps: the method comprises the following steps:
A) mixing the wood activated carbon powder activated by water vapor with alkali, and heating and activating under the condition of nitrogen to obtain a semi-finished product of activated carbon; preparing 0.6 wt% graphene aqueous dispersion;
B) mixing the activated carbon semi-finished product obtained in the step with the calcium carbonate whisker, the nitrogen source and the graphene solution again, and then carrying out heating reduction reaction under protective gas to obtain a graphene air-purifying composite material;
the mass of the calcium carbonate whiskers accounts for 0.1-10% of the mass of the wood activated carbon powder; the particle size of the wood activated carbon powder is 8-12 mu m; the length of the calcium carbonate whisker is 20-30 μm; the diameter is 1-2 μm; the average sheet diameter of graphene in the graphene aqueous dispersion is 1-50 mu m;
the protective gas is one or more of hydrogen, ammonia, and nitrogen.
2. The preparation method of the graphene air-purifying composite material according to claim 1, characterized by comprising the following steps:
the base comprises one or more of potassium hydroxide, sodium hydroxide and calcium hydroxide.
3. The preparation method of the graphene air-purifying composite material according to claim 1, characterized by comprising the following steps:
the mass ratio of the wood activated carbon powder to the alkali is 1: 0.5 to 2.
4. The preparation method of the graphene air-purifying composite material according to claim 1, characterized by comprising the following steps:
the activation temperature is 500-800 ℃, and the activation time is 0.5-4 h.
5. The preparation method of the graphene air-purifying composite material according to claim 1, characterized by comprising the following steps:
the graphene in the graphene aqueous dispersion liquid accounts for 0.1-10% of the mass of the wood activated carbon powder.
6. The preparation method of the graphene air-purifying composite material according to claim 1, characterized by comprising the following steps:
the temperature of the reduction reaction is 650-800 ℃, and the time of the reduction reaction is 1-6 h.
7. The preparation method of the graphene air-purifying composite material according to claim 1, characterized by comprising the following steps:
the nitrogen source is a small molecular nitrogen-containing compound, and the mass of the nitrogen source accounts for 1-3% of the mass of the activated carbon powder.
8. The preparation method of the graphene air-purifying composite material according to claim 7, characterized in that:
the nitrogen source is melamine and/or urea.
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| CN108786729A (en) * | 2018-06-06 | 2018-11-13 | 张小伏 | The preparation method of mask graphene/active carbon in-situ plural gel adsorbent |
| CN109045992A (en) * | 2018-08-15 | 2018-12-21 | 广州康滤净化科技有限公司 | A kind of net wind material of the compound removing taste of graphene and preparation method thereof |
| CN109289915A (en) * | 2018-10-24 | 2019-02-01 | 山西新华化工有限责任公司 | Suitable for loading the efficient formaldehyde scavenging material and preparation method of air purifier |
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| CN105513832A (en) * | 2015-12-16 | 2016-04-20 | 华南理工大学 | Graphene/porous carbon composite hydrogel, graphene/porous carbon composite aerogel, and preparation methods and applications thereof |
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