CN103692763B - A kind of stripping means of two-dimensional layer nano material - Google Patents
A kind of stripping means of two-dimensional layer nano material Download PDFInfo
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Abstract
The invention provides a kind of stripping means of two-dimensional layer nano material, comprise and be dissolved in organic solvent by amphiphilic surfactant, water bath sonicator 0.5 ~ 2 hour, obtains mixed solution; Organic solvent is one or more in thio-alcohol solvent, octadecylamine, isopropyl alcohol, sulphur kind solvent, amino acids solvent, poly-amino solvent and polyalcohols solvent; Transistion metal compound material to be stripped is joined in mixed solution, after 1000 ~ 1800w is ultrasonic, centrifugal with 1500 ~ 5000rpm, remove supernatant, collecting precipitation, filter, dry, obtain solids, the two-dimensional layer nano material after namely peeling off.This stripping means technique is simple, and productive rate is higher, can obtain the nano material of the complete crystal plane structure of the controlled two dimension of individual layer, bilayer and multilayer, easily realizes low cost industrialization and produces and do not produce secondary pollution problem to environment.
Description
Technical field
The present invention relates to novel nano-material field, particularly relate to a kind of stripping means of two-dimensional layer nano material.
Background technology
Two-dimension nano materials relies on the physicochemical properties of its uniqueness, has immeasurable application potential in fields such as semiconductor, microelectronic component and biologic medicals, to cause the concern of many researchers in recent years.As single-layer graphene because its special electricity, optics, calorifics and engineering properties become one of study hotspot of current field of nanometer material technology.Recent research finds, other two-dimensional layer nano materials possessing similar Graphene have very unique physicochemical properties equally.The particularly compound that forms of some transition metal and the VIth A race, as: MoS
2, WS
2, MoSe
2, WSe
2deng, these compounds all form " sandwich " structure by two-layer VIth A race element and middle one deck transition metal covalent bond, and are attracted to form block-type crystal by Van der Waals force between different " sandwich " interlayers.And the single or multiple lift two-dimensional layered structure nano material how obtaining high yield from these crystal is the large technical barrier faced at present.
At present, the stripping means of this kind of stratified material has the adhesive tape of machinery to tear point-score, the ultrasonic stripping method of organic solvent and chemical stripping method.Aforementioned two kinds of methods are difficult to the two-dimension single layer, the multi-layer nano material that obtain high yield; And the very consuming time and chemical reagent operating environment used of chemical stripping method require higher, method security is lower; These three kinds of methods do not possess the potentiality of suitability for industrialized production, therefore, are not all the Perfected process obtaining two-dimension single layer, multi-layer nano material.
Summary of the invention
In view of this, embodiments provide a kind of stripping means of two-dimensional layer nano material, the method that this stripping means adopts amphiphilic surfactant to combine with one or more organic solvents, by synergy to realize the stripping to two-dimensional layer material, obtain the nano material of the controlled complete crystal plane structure of two dimension of individual layer, bilayer and multilayer, the method technique is simple to operation, and productive rate is higher, easily realizes low cost industrialization and produces and do not produce secondary pollution problem to environment.
Embodiments provide a kind of stripping means of two-dimensional layer nano material, comprise the following steps:
Amphiphilic surfactant be dissolved in organic solvent, in water bath sonicator, ultrasonic 0.5 ~ 2 hour of 750w ~ 1200w, obtains mixed solution, and the concentration of described amphiphilic surfactant in described organic solvent is 0.1mg ~ 10mg/mL; Described amphiphilic surfactant is graphene oxide, hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyldimethyl ammonium chloride; Described organic solvent is one or more in thio-alcohol solvent, octadecylamine, isopropyl alcohol, sulphur kind solvent, amino acids solvent, poly-amino solvent and polyalcohols solvent;
Transistion metal compound material to be stripped is joined in above-mentioned mixed solution, under 1000 ~ 1800w ultrasonic 2 ~ 8 hours; After ultrasonic, with 1500 ~ 5000rpm centrifugal 20 ~ 60 minutes, remove supernatant, collecting precipitation, filter, in 60 ~ 100 DEG C of vacuum drying, obtain solids, described solids namely peel off after two-dimensional layer nano material.
Described solids namely peel off after two-dimensional layer nano material be head product, following purification process can be comprised further.
Preferably, when described amphiphilic surfactant be hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyldimethyl ammonium chloride time, comprise further, after described removal supernatant, deionized water is adopted repeatedly to wash described centrifugal gained precipitation to remove described hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyldimethyl ammonium chloride.When adopting hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyldimethyl ammonium chloride, gained solids comprises the individual layer after stripping, bilayer and multilayer two-dimension stratified nano materials.
Preferably, when described amphiphilic surfactant is graphene oxide, comprise further, gained solids is dissolved in deionized water, be placed in water bath sonicator 750w ~ 1200w after ultrasonic 0.5 ~ 2 hour, obtain mixed dispersion liquid, collect the surface layer film layer floated in described mixed dispersion liquid, after drying, obtain the individual layer after peeling off or double-deck two-dimensional layer nano material; And the bottom solid collected in described mixed dispersion liquid, after 60 ~ 100 DEG C of vacuum drying, obtain the multilayer two-dimension stratified nano materials after peeling off.
Preferably, described thio-alcohol solvent is lauryl mercaptan;
Described sulphur kind solvent is dodecyl sulphonic acid sodium;
Described amino acids solvent is glycine;
Described poly-amino solvent is polyurethane-urea;
Described polyalcohols solvent is polyvinyl alcohol.
Preferably, described transistion metal compound material to be stripped is transistion metal compound molybdenum bisuphide MoS
2, tungsten disulfide WS
2, two selenizing molybdenum MoSe
2or two tungsten selenide WSe
2.
Preferably, the concentration of described transistion metal compound material to be stripped in mixed solution is 1 ~ 10mg/mL.
Transistion metal compound MoS
2, WS
2, MoSe
2or WSe
2possess the physicochemical properties of the uniqueness of similar Graphene.These compounds form " sandwich " structure by two-layer VIth A race element and middle one deck transition metal covalent bond, and are attracted to form block-type crystal by Van der Waals force between different " sandwich " interlayers.The embodiment of the present invention utilizes the synergy of amphiphilic surfactant and organic solvent, effectively can break the Van der Waals force between different " sandwich " interlayers, thus realizes transistion metal compound MoS
2, WS
2, MoSe
2, WSe
2effective stripping, due to the method mild condition, therefore can obtain the nano material obtaining the controlled complete crystal plane structure of two dimension of individual layer, bilayer and multilayer.
Wherein, surface of graphene oxide has a large amount of with the oxygen-containing functional group of covalent bond form bonding, and introducing as surface has hydroxyl and epoxy radicals, and edge is then connected with carboxyl and carbonyl.It is good amphipathic and possess the functional characteristic of surfactant that these abundant functional groups make graphene oxide have.
Due to transistion metal compound MoS
2, WS
2, MoSe
2, WSe
2material is water insoluble, therefore need to find a kind of solvent this transistion metal compound material to be dissolved better, therefore the present invention chooses after amphiphilic surfactant mixes mutually with organic solvent, again transistion metal compound material to be stripped is added wherein, by synergy simultaneously by means of intense ultrasonic and centrifugal condition, to realize the stripping to above-mentioned transistion metal compound material.
Preferably, the concrete operations of described collection surface layer film layer are: the silicon sheet of surfacing cleaning is placed in described mixed dispersion liquid, make the surface layer film layer floated in described mixed dispersion liquid be hung on silicon face.
Preferably, described filter operation adopts Teflon filtration film.
Described graphene oxide be can be commercially available or is prepared by existing method.
Preferably, described graphene oxide adopts the Hummers legal system improved standby, be specially: the nitric acid and the mass concentration that powdered graphite are joined mass concentration 68% are in the sulfuric acid mixed acid that 1:6 is mixed to form by volume of 98%, ice bath magnetic agitation is after 30 minutes, slowly potassium permanganate is added at 3 ~ 6 DEG C, after described potassium permanganate adds completely, reaction temperature is risen to 30 ~ 45 DEG C, stirring reaction 2 hours, after completion of the reaction, add the unnecessary potassium permanganate of hydrogen peroxide removal, by last gained reactant liquor with 12000rpm centrifugal 30 minutes, gained precipitate with deionized water is diluted, be filtered to filtrate in neutral, described be deposited in 60 DEG C of vacuum drying after, namely graphene oxide is obtained.
Preferably, described powdered graphite carries out following pretreatment: joined by powdered graphite in 80 DEG C of sulfuric acid solutions, magnetic agitation is after 4 hours, stop heating, and add standing 8 hours of deionized water dilution, adopt Teflon filtration film to filter again, by 80 ~ 100 DEG C of vacuum drying of gained filter residue, namely obtain pretreated powdered graphite.
The stripping means of the two-dimensional layer nano material that the embodiment of the present invention provides, the method that this stripping means adopts amphiphilic surfactant to combine with one or more organic solvents, by synergy to realize the stripping to two-dimensional layer material, the method technique is simple to operation, cost is low, productive rate is higher, compare current chemical-solvent method, mechanical stripping method and chemical vapour deposition technique etc. and have obvious advantage, the complete crystal plane structure nano material of the controlled two dimension of individual layer, bilayer and multilayer can be obtained, easily realize industrialization and produce.
Based on the stripping means of the two-dimensional layer nano material of the embodiment of the present invention, be expected to realize all two-dimensional layered-structure material extensive industrialization stripping technology technology, for the application in catalysis, electricity and bio-medical field of all kinds of individual layer or double-deck two-dimensional layer material lays the foundation.
The embodiment of the present invention additionally provides the two-dimensional layer nano material after the stripping prepared by above-mentioned stripping means.Described two-dimensional layer nano material comprises individual layer, bilayer and multilayer two-dimension stratified nano materials.
Individual layer after stripping prepared by the embodiment of the present invention or double-deck two-dimensional layer nano material and multilayer two-dimension stratified nano materials can be applicable to the fields such as semiconductor, microelectronic component, biologic medical.
The advantage of the embodiment of the present invention will partly be illustrated in the following description, and a part is apparent according to description, or can be known by the enforcement of the embodiment of the present invention.
Accompanying drawing explanation
Fig. 1 is the individual layer molybdenum bisuphide transmission electron microscope details in a play not acted out on stage, but told through dialogues figure of the embodiment of the present invention one;
Fig. 2 is the individual layer molybdenum bisuphide transmission electron microscope light field figure of the embodiment of the present invention one;
Fig. 3 is the multilayer molybdenum bisuphide transmission electron microscope figure of the embodiment of the present invention one;
Fig. 4 is the double-deck molybdenum bisuphide transmission electron microscope High-Resolution Map of the embodiment of the present invention one;
Fig. 5 is the individual layer tungsten disulfide transmission electron microscope figure of the embodiment of the present invention two;
Fig. 6 is the multilayer tungsten disulfide transmission electron microscope figure of the embodiment of the present invention two;
Fig. 7 is the individual layer tungsten disulfide transmission electron microscope High-Resolution Map of the embodiment of the present invention two.
Detailed description of the invention
The following stated is the preferred embodiment of the embodiment of the present invention; should be understood that; for those skilled in the art; under the prerequisite not departing from embodiment of the present invention principle; can also make some improvements and modifications, these improvements and modifications are also considered as the protection domain of the embodiment of the present invention.
Multiple embodiment is divided to be further detailed the embodiment of the present invention below.The embodiment of the present invention is not limited to following specific embodiment.In the scope of constant principal right, carrying out that can be suitable is changed and implements.
Embodiment one
A kind of molybdenum bisuphide (MoS
2) stripping means, comprise the steps:
(1) Graphitic pretreatment: by 100mg powdered graphite (Sigma Aldrich, 1 μm) add in 10mL 80 DEG C of sulfuric acid solutions, magnetic agitation keeps stopping heating in 4 hours, the dilution of 2L deionized water is slowly added in mixed solution, leave standstill after 8 hours, then carry out filtering (employing PTFE filter membrane, diameter 47mm, Milliporefilter) to remove sulfuric acid solution, after filter, solid 100 DEG C of vacuum drying are for subsequent use;
The preparation of graphene oxide: above-mentioned pretreated powdered graphite (5g) is joined nitric acid (33mL, 68%) with sulfuric acid (200mL, 98%) in mixed solution, ice bath magnetic agitation is after 30 minutes, by 30g potassium permanganate (KMnO
4) slowly to add in said mixture and to maintain the temperature at about 5 DEG C, after potassium permanganate adds completely, reaction temperature is risen to 40 DEG C, stirring reaction 2 hours, get 20mL hydrogen peroxide (10%) to be again added in above-mentioned reactant liquor to remove unnecessary potassium permanganate, by the centrifugal 30min of end reaction thing 12000rpm, remove supernatant, gained precipitation adds deionized water 450mL dilution, refilter and (adopt PTFE filter membrane, diameter 47mm, Millipore filter), until the pH of filtrate is neutral, by filter residue 60 DEG C of vacuum drying, obtain graphene oxide.
(2) above-mentioned obtained graphene oxide 50mg is dissolved in 500mL isopropyl alcohol (IPA), be placed in the ultrasonic 0.5h of water bath sonicator (Branson2510EMT) 750w, obtain mixed solution, then 500mg molybdenum disulfide powder (Sigma Aldrich is taken, 1 μm) add in above-mentioned mixed solution, then be placed in sonde-type Strong dispersion Ultrasound Instrument (Vibra-Cell
tMvCX1500W) in, ultrasonic 6h;
After ultrasonic, by the above-mentioned mixed solution that obtains with 3000rpm centrifugal 30 minutes, supernatant is removed, collecting precipitation product is (PTFE filter membrane after filtration, diameter 47mm, Millipore filter), then after vacuum drying (60 DEG C), obtain the solids that graphene oxide mixes with molybdenum bisuphide interlayer;
(3) above-mentioned gained solids is dissolved in deionized water, be placed in the ultrasonic 1h of water bath sonicator (Branson2510EMT) 750w, obtain mixed dispersion liquid, finally suspend in water because graphene oxide has strong hydrophily, hydrophobic individual layer or double-deck molybdenum disulfide nano sheet can float on the upper surface of water, form very thin surface layer film layer, and a large amount of multilayer molybdenum disulfide nano sheet will be deposited on bottom deionized water and form upper and lower lamination; Be placed in mixed dispersion liquid water with the silicon sheet of surfacing cleaning and the individual layer of surfactant suspension or double-deck molybdenum bisuphide are hung on silicon face gently, the individual layer after stripping or double-deck molybdenum disulfide nano sheet after drying, can be obtained; Undertaken filtering (PTFE filter membrane by through the multilayer molybdenum disulfide nano sheet removed after the residue stripping after the graphene oxide water solution of upper strata again, diameter 47mm, Millipore filter), then after vacuum drying (60 DEG C), obtain the multilayer molybdenum disulfide nano sheet after peeling off.
The present embodiment products therefrom is carried out transmission electron microscope observation, and as shown in Figure 1 to 4, wherein, Fig. 1 is the transmission electron microscope details in a play not acted out on stage, but told through dialogues figure of individual layer molybdenum bisuphide to result; Fig. 2 is the transmission electron microscope light field figure of individual layer molybdenum bisuphide; Fig. 3 is the transmission electron microscope figure of multilayer molybdenum bisuphide; Fig. 4 is the transmission electron microscope High-Resolution Map of double-deck molybdenum bisuphide.As can be seen from the figure: molybdenum bisuphide block can be peeled off into individual layer by stripping means of the present invention completely, the molybdenum disulfide nano sheet of double-deck and many layer structures, and peel off after individual layer molybdenum bisuphide atom hexagonal structure complete, there is no defect; From Fig. 3, observable goes out the number of plies of the mutual lamination of multilayer molybdenum bisuphide, but multi-layer nano sheet exists edge defect phenomenon, may be several layers of nanometer sheet overlapping time produce caused by staggered floor.
Embodiment two
A kind of tungsten disulfide (WS
2) stripping means, comprise the steps:
(1) Graphitic pretreatment: by 100mg powdered graphite (Sigma Aldrich, 1 μm) add in 10mL 80 DEG C of sulfuric acid solutions, magnetic agitation keeps stopping heating in 4 hours, the dilution of 2L deionized water is slowly added in mixed solution, leave standstill after 8 hours, then carry out filtering (employing PTFE filter membrane, diameter 47mm, Milliporefilter) to remove sulfuric acid solution, after filter, solid 100 DEG C of vacuum drying are for subsequent use;
The preparation of graphene oxide: above-mentioned pretreated powdered graphite (5g) is joined nitric acid (33mL, 68%) with sulfuric acid (200mL, 98%) in mixed solution, ice bath magnetic agitation is after 30 minutes, by 30g potassium permanganate (KMnO
4) slowly to add in said mixture and to maintain the temperature at about 5 DEG C, after potassium permanganate adds completely, reaction temperature is risen to 40 DEG C, stirring reaction 2 hours, get 20mL hydrogen peroxide (10%) to be again added in above-mentioned reactant liquor to remove unnecessary potassium permanganate, by the centrifugal 30min of end reaction thing 12000rpm, remove supernatant, gained precipitation adds deionized water 450mL dilution, refilter and (adopt PTFE filter membrane, diameter 47mm, Millipore filter), until the pH of filtrate is neutral, by filter residue 60 DEG C of vacuum drying, obtain graphene oxide.
(2) above-mentioned obtained graphene oxide 5g is dissolved in 500mL lauryl mercaptan (1-dodecanethiol), be placed in the ultrasonic 2h of water bath sonicator (Branson2510EMT) 1200w, obtain mixed solution, then take 5g tungsten disulfide (WS
2) powder (Sigma Aldrich, 1 μm) adds in above-mentioned mixed solution, then be placed in sonde-type Strong dispersion Ultrasound Instrument (Vibra-Cell
tMvCX) in, the ultrasonic 2h of 1500W;
After ultrasonic, by the above-mentioned mixed solution that obtains with 5000rpm centrifugal 40 minutes, supernatant is removed, collecting precipitation product is (PTFE filter membrane after filtration, diameter 47mm, Millipore filter), then after vacuum drying (100 DEG C), obtain the solids that graphene oxide mixes with tungsten disulfide interlayer;
(3) above-mentioned gained solids is dissolved in deionized water, be placed in the ultrasonic 2h of water bath sonicator (Branson2510EMT) 1200w, obtain mixed dispersion liquid, finally suspend in water because graphene oxide has strong hydrophily, hydrophobic individual layer or double-deck tungsten disulfide nano slices can float on the upper surface of water, form very thin surface layer film layer, and a large amount of multilayer tungsten disulfide nano slices will be deposited on bottom deionized water and form upper and lower lamination; Be placed in mixed dispersion liquid water with the silicon sheet of surfacing cleaning and the individual layer of surfactant suspension or double-deck tungsten disulfide are hung on silicon face gently, the individual layer after stripping or double-deck tungsten disulfide nano slices after drying, can be obtained; Undertaken filtering (PTFE filter membrane by through the multilayer tungsten disulfide nano slices removed after the residue stripping after the graphene oxide water solution of upper strata again, diameter 47mm, Millipore filter), then after vacuum drying (100 DEG C), obtain the multilayer tungsten disulfide nano slices after peeling off.
The present embodiment products therefrom is carried out transmission electron microscope observation, and result is as shown in Fig. 5 ~ Fig. 7, and wherein, Fig. 5 is the transmission electron microscope figure of individual layer tungsten disulfide; Fig. 6 is the transmission electron microscope figure of multilayer tungsten disulfide; Fig. 7 is the transmission electron microscope High-Resolution Map of individual layer tungsten disulfide.As can be seen from the figure, tungsten disulfide nano slices size after being stripped is less (100 ~ 300nm), several layers of tungsten disulfide nano slices are overlapping, but still each layer edge and the estimation number of plies can be observed, High-Resolution Map 7 shows its complete hexagonal lattice structure, almost zero defect, absolutely proves that this method stripped laminar tungsten disulfide nano slices can keep its original atomic lattice and physical and chemical performance, and can obtain individual layer and the less nanometer sheet of several layers of relative size.
Embodiment three
A kind of tungsten disulfide (WS
2) stripping means, comprise the steps:
2g octadecyldimethyl ammonium chloride (Sigma Aldrich) is joined in 500mL isopropyl alcohol (IPA), be placed in the ultrasonic 2h of water bath sonicator (Branson2510EMT) 750w, obtain mixed solution, then take 2g tungsten disulfide (WS
2) powder (Sigma Aldrich, 1 μm) adds in above-mentioned mixed solution, then be placed in sonde-type Strong dispersion Ultrasound Instrument (Vibra-Cell
tMvCX) in, the ultrasonic 2h of 1500W;
After ultrasonic, by the above-mentioned mixed solution that obtains with 1500rpm centrifugal 60 minutes, supernatant is removed, and repeatedly precipitate (three to four times) to remove octadecyldimethyl ammonium chloride completely with the centrifugal gained of washed with de-ionized water, last collecting precipitation product is (PTFE filter membrane, diameter 47mm, Milliporefilter) after filtration, again after vacuum drying (100 DEG C), obtain tungsten disulfide laminar nano sheet.
Embodiment four
A kind of molybdenum bisuphide (MoS
2) stripping means, comprise the steps:
100mg hexadecyldimethyl benzyl ammonium ammonium bromide (Sigma Aldrich) is joined in 500mL isopropyl alcohol (IPA), concentration is 0.5mg/mL, be placed in the ultrasonic 2h of water bath sonicator (Branson2510EMT) 1200w, obtain mixed solution, then take 1g molybdenum bisuphide (MoS
2) powder (Sigma Aldrich, 1 μm) adds in above-mentioned mixed solution, then be placed in sonde-type Strong dispersion Ultrasound Instrument (Vibra-Cell
tMvCX) in, the ultrasonic 2h of 1500W;
After ultrasonic, by the above-mentioned mixed solution that obtains with 5000rpm centrifugal 40 minutes, supernatant is removed, and repeatedly precipitate (three to four times) to remove hexadecyldimethyl benzyl ammonium ammonium bromide completely with the centrifugal gained of washed with de-ionized water, last collecting precipitation product is (PTFE filter membrane, diameter 47mm, Milliporefilter) after filtration, again after vacuum drying (100 DEG C), obtain molybdenum bisuphide laminar nano sheet.
Claims (8)
1. a stripping means for two-dimensional layer nano material, is characterized in that, comprises the following steps:
Amphiphilic surfactant be dissolved in organic solvent, in water bath sonicator, ultrasonic 0.5 ~ 2 hour of 750 ~ 1200W, obtains mixed solution, and the concentration of described amphiphilic surfactant in described organic solvent is 0.1mg ~ 10mg/mL; Described amphiphilic surfactant is graphene oxide, hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyldimethyl ammonium chloride; Described organic solvent is one or more in lauryl mercaptan, octadecylamine, isopropyl alcohol, glycine, polyurethane-urea and polyvinyl alcohol;
Transistion metal compound material to be stripped is joined in above-mentioned mixed solution, under 1000 ~ 1800W ultrasonic 2 ~ 8 hours; After ultrasonic, with 1500 ~ 5000rpm centrifugal 20 ~ 60 minutes, remove supernatant, collecting precipitation, filter, in 60 ~ 100 DEG C of vacuum drying, obtain solids, described solids namely peel off after two-dimensional layer nano material.
2. the stripping means of two-dimensional layer nano material as claimed in claim 1, it is characterized in that, when described amphiphilic surfactant be hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyldimethyl ammonium chloride time, comprise further, after described removal supernatant, deionized water is adopted repeatedly to wash described centrifugal gained precipitation to remove described hexadecyldimethyl benzyl ammonium ammonium bromide or octadecyldimethyl ammonium chloride.
3. the stripping means of two-dimensional layer nano material as claimed in claim 1, it is characterized in that, when described amphiphilic surfactant is graphene oxide, comprise further, gained solids is dissolved in deionized water, is placed in water bath sonicator 750 ~ 1200W after ultrasonic 0.5 ~ 2 hour, obtains mixed dispersion liquid, collect the surface layer film layer floated in described mixed dispersion liquid, after drying, obtain the individual layer after peeling off or double-deck two-dimensional layer nano material; And the bottom solid collected in described mixed dispersion liquid, after 60 ~ 100 DEG C of vacuum drying, obtain the multilayer two-dimension stratified nano materials after peeling off.
4. the stripping means of two-dimensional layer nano material as claimed in claim 1, it is characterized in that, described transistion metal compound material to be stripped is MoS
2, WS
2, MoSe
2or WSe
2.
5. the stripping means of two-dimensional layer nano material as claimed in claim 1, it is characterized in that, the concentration of described transistion metal compound material to be stripped in mixed solution is 1 ~ 10mg/mL.
6. the stripping means of two-dimensional layer nano material as claimed in claim 3, it is characterized in that, the concrete operations of described collection surface layer film layer are: the silicon sheet of surfacing cleaning is placed in described mixed dispersion liquid, make the surface layer film layer floated in described mixed dispersion liquid be hung on silicon face.
7. the stripping means of two-dimensional layer nano material as claimed in claim 1, is characterized in that, described filter operation adopts Teflon filtration film.
8. the stripping means of two-dimensional layer nano material as claimed in claim 1, it is characterized in that, described graphene oxide adopts the Hummers legal system improved standby, be specially: the nitric acid and the mass concentration that powdered graphite are joined mass concentration 68% are in the sulfuric acid mixed acid that 1:6 is mixed to form by volume of 98%, ice bath magnetic agitation is after 30 minutes, slowly potassium permanganate is added at 3 ~ 6 DEG C, after described potassium permanganate adds completely, reaction temperature is risen to 30 ~ 45 DEG C, stirring reaction 2 hours, after completion of the reaction, add the unnecessary potassium permanganate of hydrogen peroxide removal, by last gained reactant liquor with 12000rpm centrifugal 30 minutes, gained precipitate with deionized water is diluted, be filtered to filtrate in neutral, described be deposited in 60 DEG C of vacuum drying after, namely graphene oxide is obtained.
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| WO2013010211A1 (en) * | 2011-07-19 | 2013-01-24 | The Australian National University | Exfoliating laminar material by ultrasonication in surfactant |
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| TW201210937A (en) * | 2010-04-22 | 2012-03-16 | Basf Se | Producing two-dimensional sandwich nanomaterials based on graphene |
| WO2013010211A1 (en) * | 2011-07-19 | 2013-01-24 | The Australian National University | Exfoliating laminar material by ultrasonication in surfactant |
| CN102583547A (en) * | 2012-03-07 | 2012-07-18 | 长安大学 | Preparation method of monolayer MoS2 nano-sheet solution |
| CN102694171A (en) * | 2012-06-08 | 2012-09-26 | 浙江大学 | Hydrothermal preparation method for composite material of single-layer WS2 and graphene |
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