CN104056713B - The separation method of stannic oxide/graphene nano material in a kind of soil - Google Patents
The separation method of stannic oxide/graphene nano material in a kind of soil Download PDFInfo
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- CN104056713B CN104056713B CN201410263493.8A CN201410263493A CN104056713B CN 104056713 B CN104056713 B CN 104056713B CN 201410263493 A CN201410263493 A CN 201410263493A CN 104056713 B CN104056713 B CN 104056713B
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Abstract
A separation method for stannic oxide/graphene nano material in soil, step is as follows: 1) by after pedotheque drying, crosses 100 mesh sieves, obtains soil powder; 2) in the container that earth powder is housed, add ultra-pure water, be placed in and vortex oscillator mix 15min water and soil is fully contacted, obtain water and soil mixed liquor; 3) by under water and soil mixed liquor room temperature on shaking table cyclotron oscillation, shaking speed >=180r/min, duration of oscillation >=4h, make graphene oxide be deposited in upper soll layer gradually; 4) the graphene oxide ultra-pure water being deposited in upper soll layer is washed out, through filter membrane suction filtration and freeze drying at-50 DEG C, graphene oxide powder can be obtained.Advantage of the present invention is: the method technique of this kind separation of oxygenated graphene nano material from soil is simple, be easy to operation, and the nano material being separated other kinds in soil can be used for reference, contribute to the research of nano material biochemistry behavior in soil environment.
Description
Technical field
The present invention relates to nanometer technology and field of environment protection, specifically, is a kind of method of separation of oxygenated graphene nano material from soil.
Background technology
Nano material has the characteristics such as absorption, catalysis, radiation and absorption, nano particle is due to its a large amount of micro-interfaces and microporosity, various interfacial reaction can be strengthened, as the surface and obligate adsorption reaction etc. of heavy metal, remarkable effect will be played in the improvement of heavy metal pollution and persistency organic contaminant soil.
Graphene oxide has a large amount of oxygen-containing functional groups and huge surface area, has very strong adsorption capacity to the organic and inorganic pollution in soil, and its increasingly extensive application in contaminated soil remediation, has caused each side more and more to pay close attention to.Analyzing and characterizing in the process of graphene oxide in soil, the composition of soil matrix complexity, interference can formed to testing result.From soil, isolate graphene oxide, not only make graphene oxide can circular regeneration, and will contribute to analyzing its biochemistry behavior in soil environment, and analyze its mechanism of action in repairing polluted soil process.
Summary of the invention
The object of the invention is for current demand, the separation method of stannic oxide/graphene nano material in a kind of soil is provided.The method technique is simple, be easy to operation.
Technical scheme of the present invention:
A separation method for stannic oxide/graphene nano material in soil, step is as follows:
1) by after pedotheque drying, cross 100 mesh sieves, obtain soil powder;
2) in the container that above-mentioned soil powder is housed, add ultra-pure water, be then placed on vortex oscillator and mix 15min, water and soil is fully contacted, obtain water and soil mixed liquor;
3) by under above-mentioned water and soil mixed liquor room temperature on shaking table cyclotron oscillation, shaking speed >=180r/min, duration of oscillation >=4h, make the graphene oxide be originally mixed in soil matrix be deposited in upper soll layer gradually;
4) the above-mentioned graphene oxide ultra-pure water being deposited in upper soll layer is washed out, through 0.22 μm of water system filter membrane suction filtration and freeze drying at-50 DEG C, graphene oxide powder can be obtained.
Described ultrapure resistivity of water 15 ± 2.0M Ω cm, the amount ratio of soil powder and ultra-pure water is 10g:35mL.
Advantage of the present invention is: the method technique of this kind separation of oxygenated graphene nano material from soil is simple, be easy to operation, and the nano material being separated other kinds in soil can be used for reference, contribute to the research of nano material biochemistry behavior in soil environment.
Accompanying drawing explanation
The separating effect photo of graphene oxide when Fig. 1 is the different cyclotron oscillation time under shaking speed 220r/min.
The separating effect photo of graphene oxide when Fig. 2 is difference cyclotron oscillation 4h under different shaking speed, wherein (a) is photo before cyclotron oscillation, and (b) is photo after cyclotron oscillation.
Fig. 3 is the photo of isolated graphene oxide powder from soil.
Fig. 4 is that the TEM of isolated graphene oxide from soil tests photo, wherein (a) the original TEM photo that is graphene oxide, and (b) is graphene oxide TEM photo isolated in soil.
Detailed description of the invention
The pedotheque that following examples use is the potting soil being evenly mixed with 500ppm graphene oxide, and the soil being mixed with graphene oxide is successively through overbalance 60 days and planting plants 90 days, and period keeps 70% of field capacity.
Embodiment 1:
A separation method for stannic oxide/graphene nano material in soil, step is as follows:
1) by after pedotheque freeze drying, cross 100 mesh sieves, obtain soil powder;
2) 10g soil powder is placed in 50mL centrifuge tube, adds the ultra-pure water of 35mL resistivity 15 ± 2.0M Ω cm, be then placed in and vortex oscillator mix 15min water and soil is fully contacted, obtain water and soil mixed liquor;
3) by under above-mentioned water and soil mixed liquor room temperature on 220r/min shaking table cyclotron oscillation 20h, therebetween respectively in the deposition conditions of 0h, 2h, 4h, 6h, 8h, 10h and 20h Taking Pictures recording graphene oxide at upper soll layer, the graphene oxide be originally mixed in soil matrix is made to be deposited in upper soll layer gradually, as shown in Figure 1, shaking table duration of oscillation is more than after 4h, and graphene oxide tends towards stability at the deposit thickness of upper soll layer;
4) the above-mentioned graphene oxide ultra-pure water being deposited in upper soll layer is washed out, through 0.22 μm of water system filter membrane suction filtration and freeze drying at-50 DEG C, graphene oxide powder can be obtained.
Fig. 3 is the photo of isolated graphene oxide powder from soil.
Fig. 4 is that the TEM of isolated graphene oxide from soil tests photo, and wherein (b) is graphene oxide TEM photo isolated in soil.Fig. 4 shows: from soil, successfully isolate graphene oxide, and graphene oxide is reunited, and thickness increases, and adsorbs simultaneously and secures some soil matrix compositions.
Embodiment 2:
A separation method for stannic oxide/graphene nano material in soil, step 1), 2), 4) identical with embodiment 1, difference is that step 3) is as follows:
3) by water and soil mixed liquor respectively 180,200, cyclotron oscillation 4h on 220r/min shaking table, the graphene oxide in soil is made to be deposited in upper soll layer, and Taking Pictures recording graphene oxide is in the deposition conditions of upper soll layer, as shown in Figure 2, wherein (a) is photo before cyclotron oscillation, b () is photo after cyclotron oscillation, show in figure: when shaking speed is more than 200r/min, and graphene oxide tends towards stability at the deposit thickness of upper soll layer.
Claims (2)
1. the separation method of stannic oxide/graphene nano material in soil, is characterized in that step is as follows:
1) by after pedotheque drying, cross 100 mesh sieves, obtain soil powder;
2) in the container that above-mentioned soil powder is housed, add ultra-pure water, be then placed on vortex oscillator and mix 15min, water and soil is fully contacted, obtain water and soil mixed liquor;
3) by under above-mentioned water and soil mixed liquor room temperature on shaking table cyclotron oscillation, shaking speed >=180r/min, duration of oscillation >=4h, make the graphene oxide be originally mixed in soil matrix be deposited in upper soll layer gradually;
4) the above-mentioned graphene oxide ultra-pure water being deposited in upper soll layer is washed out, through 0.22 μm of water system filter membrane suction filtration and freeze drying at-50 DEG C, graphene oxide powder can be obtained.
2. the separation method of stannic oxide/graphene nano material in soil according to claim 1, is characterized in that: described ultrapure resistivity of water 15 ± 2.0M Ω cm, the amount ratio of soil powder and ultra-pure water is 10g:35mL.
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| CN201410263493.8A CN104056713B (en) | 2014-06-13 | 2014-06-13 | The separation method of stannic oxide/graphene nano material in a kind of soil |
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| CN105537255A (en) * | 2016-01-31 | 2016-05-04 | 苏州高通新材料科技有限公司 | Application of sulfonated graphene oxide in remediation of soil contaminated by polycyclic aromatic hydrocarbons |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102745683A (en) * | 2012-07-24 | 2012-10-24 | 南京理工大学 | Biological oxidation graphite and preparation method thereof |
| CN103408002A (en) * | 2013-07-29 | 2013-11-27 | 南京理工大学 | Microbial reduction of graphene oxide and preparation method for graphene |
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| US8524067B2 (en) * | 2007-07-27 | 2013-09-03 | Nanotek Instruments, Inc. | Electrochemical method of producing nano-scaled graphene platelets |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102745683A (en) * | 2012-07-24 | 2012-10-24 | 南京理工大学 | Biological oxidation graphite and preparation method thereof |
| CN103408002A (en) * | 2013-07-29 | 2013-11-27 | 南京理工大学 | Microbial reduction of graphene oxide and preparation method for graphene |
Non-Patent Citations (2)
| Title |
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| 石墨烯制备方法研究;同鑫;《现代商贸工业》;20130731(第14期);188-189 * |
| 石墨烯的制备及其在电化学领域中的应用;张伟东等;《船电技术》;20130131;第33卷(第1期);61-64 * |
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