CN107082418B - It is a kind of using ore as grapheme foam of template and its preparation method and application - Google Patents
It is a kind of using ore as grapheme foam of template and its preparation method and application Download PDFInfo
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- CN107082418B CN107082418B CN201710386735.6A CN201710386735A CN107082418B CN 107082418 B CN107082418 B CN 107082418B CN 201710386735 A CN201710386735 A CN 201710386735A CN 107082418 B CN107082418 B CN 107082418B
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- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2204/00—Structure or properties of graphene
- C01B2204/04—Specific amount of layers or specific thickness
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2204/00—Structure or properties of graphene
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- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
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- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
Abstract
The present invention relates to a kind of using ore as grapheme foam of template and its preparation method and application.The present invention forms continuous three-dimensional grapheme macroscopic body, subsequent etching falls template, obtains high porosity three-dimensional graphene foam using catalytic pyrolysis carbon matrix precursor gas in the ore template of chemical vapour deposition technique after firing.The method that the present invention prepares grapheme foam as template using plentiful ore raw materials has the characteristics that raw material is plentiful, easy to operate, template easily removes, structure is easy to regulate and control, gained grapheme foam porosity is high, pore-size distribution is multi-level.The grapheme foam is the graphene macroform for the three-dimensional space network structure with high porosity that there is the two-dimensional graphene of excellent conduction/thermal conductivity to be formed by seamless connection, have the advantages that low-density, high-specific surface area and excellent heat conducting/electric conductivity, lays a good foundation for the application of graphene.
Description
Technical field
It is the present invention relates to the preparation method field of grapheme foam, in particular to a kind of to be steeped by the graphene of template of ore
Foam and its preparation method and application.
Background technique
Graphene is by sp2The single layer of carbon atom planar that the carbon atom of hydridization is formed using regular hexagon as the period it is new
Material.Since 2004 are found, due to its excellent thermally conductive, conductive, mechanical property, and people are received and have widely closed
Note has significant application value in terms of micro-nano electronic device, catalysis, energy management, aeromechanics.
Three-dimensional structure is the most universal most common existence form of nature, and three-dimensional grapheme macroscopic view block is to determine graphene
The basis of macroexercise and key.How by the two-dimensional graphene material with excellent physical chemical property be assembled into macroscopic view three
Dimension structure is to push the importance of graphene application.Compared to two-dimensional film, three-dimensional graphene foam has a large amount of hole knot
Structure, density is small, high-specific surface area, electric-conductivity heat-conductivity high etc. advantage so that its water-oil separating, catalysis, energy storage, heat exchange,
The macroscopic view application aspect tool such as electronic device has great advantage.Preparing the common methods of grapheme foam at present includes graphene oxide
Self assembly and templated chemistry vapour deposition process.Wherein graphene oxide self-assembly method there are the problem of include that process is more numerous
It is trivial, environmentally harmful by-product may be generated during preparing graphene oxide and redox graphene, in addition stone
The defect of black alkene and impurity in grapheme foam also can further its excellent thermally conductive/electric conductivities of brokenization.
And template chemical vapor deposition is proved to be a kind of method for producing high-quality graphene foam, due to by non-
Of low quality, and the typically powdered graphene of the long graphene of the ore of metal, thus it is main at present or steeped with nickel
Foam is template.But use metal foam be template produce grapheme foam equally there is also the later period etch metal foam it is more difficult,
The problem of metal residual etc., limits the volume production of grapheme foam.
Summary of the invention
The present invention provides a kind of mass production preparation methods of grapheme foam, and this method process is simply controllable, for choosing
The template selected is at low cost, abundant raw material, later period easily remove the mass system, it can be achieved that high porosity three-dimensional graphene foam
It is standby.
The preparation method of grapheme foam provided by the invention, using the ore template of chemical vapour deposition technique after firing
Upper catalytic pyrolysis carbon matrix precursor gas, forms continuous three-dimensional grapheme macroscopic body, and subsequent etching falls template, obtains Hierarchical porosity
Diameter, high porosity three-dimensional graphene foam.Specific steps include:
(1) in carrier gas atmosphere high temperature calcined ore, high porosity three-dimensional ore template is obtained；
(2) chemical vapour deposition technique is used, carbon matrix precursor, catalytic pyrolysis carbon in three-dimensional ore template after firing are introduced
Presoma generates the three-dimensional network of graphene；
(3) by the calcined three-dimensional ore template of etching removal, grapheme foam is obtained.
In the step (1), the ore includes but is not limited to that carbonate, Nitrates, Sulfates etc. can be in height
The lower calcining and decomposing of temperature generates the acid group salt ore of gas, preferably oxygen-containing acid group salt ore, further preferred sulfate radical salt
Ore, nitrate anion class ore；Such as calcite (Iceland spar), dolomite, magnesite, malachite, siderite, smithsonite, zinc powder
Mine, chessy copper etc..
In the step (1), the carrier gas be hydrogen or inert gas (for example, argon gas, nitrogen, helium) or they
Between gaseous mixture.It is preferred that argon gas is mixed with hydrogen with 10:1sccm.
In the step (1), the temperature of the high-temperature calcination is 200-1000 DEG C, and heating rate is 0.5-200 DEG C/minute
Clock, calcination time are 5-2400 minutes.Specific process parameter will do adaptable adjustment according to different ores, such as sulfate radical
Salt ore calcination temperature is 500-1500 DEG C, and heating rate is 0.5-200 DEG C/min, and calcination time is 5-2400 minutes；It is right
It is 100-1000 DEG C in nitrate anion class ore calcination temperature, heating rate is 0.5-200 DEG C/min, calcination time 5-2400
Minute.The study found that heating rate, calcination time will affect the porosity size of grapheme foam, therefore by adjusting calcining
The product of realization of process parameters different performance.
In the step (1), it is 90-99.6% that the high porosity, which specifically refers to porosity,.
In the step (2), the carbon matrix precursor is hydrocarbon, including methane, ethane, ethylene, acetylene, benzene, first
Benzene, phenol, n-hexane, hexamethylene, ethyl alcohol, methanol, acetone etc., optimization methane.
In the step (2), the specific process parameter of the chemical vapour deposition technique are as follows: ore template after firing is drawn
Enter carbon matrix precursor, cracking temperature is 300-1200 DEG C, and duration of ventilation is -3 hours 5 minutes.Specific cracking temperature can be according to difference
Carbon matrix precursor is adjusted.
In the step (3), it is described etching use etching liquid be selected from sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, ethyl alcohol it is water-soluble
One of liquid is a variety of, and concentration is not higher than 6mol/L, and reaction temperature is not higher than 100 DEG C, preferably etches in ice bath.
The present invention has found under study for action, and carbon matrix precursor is passed through that the time is longer, and the graphene of growth is thicker, obtained graphite
The density of alkene foam will be bigger, and porosity will also reduce, therefore is prepared not by the time that is passed through of control carbon matrix precursor
The three-dimensional graphene foam of same density, different electric conductivity.
The present invention also provides grapheme foam prepared by the above method, specific surface area 170-800m2/ g, density 3-
30mg/cm3, average cell size 1-50nm, it should be noted that the grapheme foam pore-size distribution tool prepared in aforementioned manners
There is multi-layer, such as there is micropore (2<nm), mesoporous (2-50nm), macropore (>50nm).
The present invention also provides the concrete applications of grapheme foam made from the above method.High porosity three prepared by the present invention
Dimension grapheme foam further with other materials is compound is prepared into functional graphene composite material, can be in such as super capacitor electrode
Pole material, battery electrode material, hot phase transformation converting material, flexible electronic, sensor of chemical gas, water purification material, gas are net
Change material, thermal management materials, enhancing composite material etc. application.Specifically, high porosity prepared by the present invention is three-dimensional
It, can be by hydro-thermal method or cathodic electrodeposition in three-dimensional graphene foam when grapheme foam is used as electrode material for super capacitor
Surface Creation nickel metal, fake capacitance active material one or two kinds of in cobalt；The counterfeit electricity of the nickel metal or/and cobalt
Holding active material includes CoO/NiO, Ni (OH)2/Co(OH)2。
The invention has the following advantages:
(1) preparation method of the invention is simple, and alternative ore template raw material is more, and later period template is easy to carve
Erosion, it is easy to accomplish mass production.
(2) three-dimensional graphene foam prepared has that density is small, specific surface area is high, pore-size distribution separation, excellent
Different thermal conductivity, be grapheme foam water-oil separating, catalysis, energy storage, heat exchange, in terms of application
It lays a good foundation.
Detailed description of the invention
Fig. 1 is the flow diagram for preparing highly porous gap rate three-dimensional graphene foam.
Fig. 2 is the shape appearance figure for preparing highly porous each phase material of gap rate three-dimensional graphene foam；Wherein (a) is Iceland spar
Surface scanning electron microscope diagram, illustration be Iceland spar photo, length of the scale 1cm；(b) calcined calcium oxide is swept
Electron microscope picture is retouched, illustration is the photo of calcium oxide, length of the scale 1cm；(c) upper graphene mesh is grown after chemical vapor deposition
The scanning electron microscope diagram of the calcium oxide of network, illustration are the photo for growing the calcium oxide of upper graphene network, length of the scale
1cm；(d) scanning electron microscope diagram of the three-dimensional graphene foam after template is etched, illustration is the photograph of three-dimensional graphene foam
Piece, length of the scale 1cm.
Fig. 3 is the transmission electron microscope figure of a wherein spheric granules inside calcined calcium oxide.
Fig. 4 is the morphology characterization of three-dimensional graphene foam, wherein (a) is the high-resolution topography scan of three-dimensional graphene foam
Electron microscope picture；It (b) is the pattern transmission electron microscope of three-dimensional graphene foam.
Fig. 5 is the Raman map of three-dimensional graphene foam.
Fig. 6 is the x-ray photoelectron spectroscopy of the C1s of three-dimensional graphene foam.
Fig. 7 is that figure is desorbed in the nitrogen adsorption of three-dimensional graphene foam, and illustration is its pore-size distribution.
Fig. 8 is surface topography of the three-dimensional graphene foam electrochemical cathode electro-deposition fake capacitance substance as supercapacitor
And distribution diagram of element；Wherein (a) is three-dimensional graphene foam negative electrode electro-deposition Ni (OH)2/Co(OH)2Electrode surface scanning afterwards
Electron microscope picture；It (b) is three-dimensional graphene foam negative electrode electro-deposition Ni (OH)2/Co(OH)2Electrode C, O, Co, Ni element
Distribution map.
Fig. 9 is three-dimensional graphene foam electrochemical cathode deposit N i (OH)2/Co(OH)2Electrode electro Chemical performance afterwards；
Wherein (a) three-dimensional graphene foam negative electrode electro-deposition Ni (OH)2/Co(OH)2Electrode difference afterwards sweeps the cyclic voltammetry curve of speed；
It (b) is three-dimensional graphene foam negative electrode electro-deposition Ni (OH)2/Co(OH)2Specific capacitance of the electrode afterwards in different scanning speeds；
It (c) is three-dimensional graphene foam negative electrode electro-deposition Ni (OH)2/Co(OH)2The discharge curve under different power-discharging densities of electrode afterwards.
Figure 10 is three-dimensional graphene foam negative electrode electro-deposition Ni (OH)2/Co(OH)2Symmetrical supercapacitor schematic diagram afterwards
And long-term cycle performance.Wherein (a) three-dimensional graphene foam negative electrode electro-deposition Ni (OH)2/Co(OH)2Symmetrical super capacitor afterwards
Device assembling schematic diagram；(b) three-dimensional graphene foam negative electrode electro-deposition Ni (OH)2/Co(OH)2Symmetrical supercapacitor photo afterwards；
(c) two three-dimensional graphene foam negative electrode electro-deposition Ni (OH)2/Co(OH)2Afterwards symmetrical supercapacitor series connection light one it is red
The photo of color LED lampet.(d) three-dimensional graphene foam negative electrode electro-deposition Ni (OH)2/Co(OH)2Symmetrical supercapacitor afterwards is permanent
Electric current fast charging and discharging performance steady in a long-term, wherein illustration is the 10 quick charge and discharges of 10 fast charging and discharging curves of initial stage and later period
Electric curve.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is further explained.These embodiments, which are not used in, to be limited the scope of the invention
And it is merely to illustrate the present invention.In addition, after reading the content taught by the present invention, those skilled in the art make the present invention
Any type of modification, such equivalent forms are equally limited by the application the appended claims.
Embodiment 1 prepares three-dimensional graphene foam using calcined Iceland spar as growth templates
The chemical component of natural crystal Iceland spar is calcium carbonate, and calcium carbonate will be decomposed into carbon dioxide at 825~896.6 DEG C
And calcium oxide.The process for preparing three-dimensional graphene foam is as shown in Fig. 1.
One block of natural crystal Iceland spar is placed on piece of silicon on piece, is sent to horizontal high temperature process furnances center.In argon gas: hydrogen
Calcination processing is carried out under gas=300:30sccm atmosphere.High temperature process furnances are heated to 1050 DEG C from room temperature, time-consuming 300 minutes.
Identical atmosphere, at a temperature of keep 300 minutes, enable Iceland spar to be sufficiently converted into calcium oxide, obtain fully calcined.Calcining
Iceland spar afterwards still maintains the trapezoid body shape of former Iceland spar, and color becomes pure white.
After the completion of calcining, identical atmosphere and identical temperature are kept, is introduced carbon matrix precursor gases methane (20sccm).First
Alkane adsorbs cracking on the calcium oxide with high porosity, forms sp2Gradually in the micro-structure table of calcium oxide after hydbridized carbon atoms
Face generates graphene network structure, and the duration of the chemical vapor deposition is 60 minutes.Temperature fall is to room temperature, with graphite
The calcium oxide of alkene network structure keeps prototype, and metal bright grey is presented in color.In hydrochloric acid: in ethyl alcohol=300:80mL etching liquid
Ice bath after calcium skeleton to be oxidized thoroughly dissolves, there is high porosity black three-dimensional graphene foam just to prepare completion.
Embodiment 2: the shape appearance figure of each phase material in three-dimensional graphene foam preparation process
The Iceland spar of natural crystal is glittering and translucent, since it is wide with the characteristic of greatest birefringence rate in natural crystal
It is general to apply to electronics, optical device etc..As shown in attached drawing 2 (a), its table of the Scanning Electron microscopy on Iceland spar surface
Face is very smooth, and calcium carbonate closely combines to form the glittering and translucent crystal form of Iceland spar.Shown in attached drawing 2 (b),
There are sizes for calcined Iceland spar micro-structure in the spherical particle of about 500nm diameter, and divides inside each spherical particle
Cloth mesoporous (see the attached drawing 3) of 20nm or so.The porosity of this height is conducive to methane gas well into and hole table
Face generates graphene.Larger change (see attached drawing 2c) does not occur for the calcium oxide microstructure for covering with graphene network.It is such as attached
Shown in Fig. 2 d, finally after calcium oxide is sufficiently etched, three-dimensional grapheme can accurately replicate the calcium oxide mould of high porosity
Plate generates the porous three-dimensional grapheme foam for having height hierarchical.
Embodiment 3: the microscopic appearance and its graphene quality characterization of three-dimensional graphene foam
For the microscopic appearance of three-dimensional graphene foam described in implementation column 2 as shown in attached drawing 4a, the graphene film of fold is whole
Synthesize macroscopic three dimensional space net structure.Transmission electron microscope figure such as attached drawing 4b also show that three-dimensional graphene foam be by
Made of the graphene film seamless connection of buckle fold.The fold two-dimensional graphene of these irregular accumulations makes three-dimensional grapheme
Formation of foam polycrystalline form, as in attached drawing 4b upper right illustration typical (100) and (002) diffraction ring shown in.Attached drawing 4b is left
The graphene that lower illustration demonstrates the synthesis of this kind of method is few layer graphene.Equally as shown in the Raman spectrum of Fig. 5, it will be apparent that D
Peak, the peak G, the peak 2D illustrate that synthesized graphene film is that there are the high quality of a small amount of defect to lack layer graphene at edge.The X of attached drawing 6
X-ray photoelectron spectroscopy X illustrates the graphene synthesized, and there are minimal amount of sp3The carbon of hydridization, it is most of still with sp2Hydridization form
Carbon exist, further illustrate the graphene high quality of synthesis.Attached drawing 7 is the nitrogen adsorption desorption figure of three-dimensional graphene foam,
Specific surface area by calculating three-dimensional grapheme reaches 180m2/ g, and the hole of the upper left cut line grapheme foam of attached drawing 7
Diameter distribution meets attached hole shown in Fig. 3.
Embodiment 4: electrochemical cathode electro-deposition active material makes electrode of super capacitor in three-dimensional graphene foam
Material
Three-dimensional grapheme described in implementation column 2 connects copper conductor after dry by elargol and immerses in the electrolyte prepared
It carries out cathode and deposits fake capacitance active material.The ingredient of electrolyte is the six water Ni (NO of 0.291g3)2, the six water Co of 0.582g
(NO3)2, the urea of 0.24g, the ethyl alcohol of 10mL, the deionized water of 50mL.It is electrodeposited under three electrode modes and carries out, working electrode
It is platinum electrode to electrode, reference electrode is saturated calomel electrode for three-dimensional grapheme.Working electrode holding -1V voltage, is sunk
After product 300s, electrode of super capacitor is made.As shown in the high-resolution Scanning Electron microscope figure of attached drawing 8a, about 15 nanometer thickness
Lamelliform Ni (OH)2/Co(OH)2Uniformly exist on three-dimensional grapheme.C, O, Co, Ni shown in attached drawing 8b equably divide
It is distributed in the visual field, it was demonstrated that the fake capacitance substance that the negative electrode electro-deposition is evenly distributed.
Embodiment 5: three-dimensional graphene foam electrochemical cathode deposit N i (OH)2/Co(OH)2The chemical property of electrode
Electro-deposition described in embodiment 4 Ni (OH)2/Co(OH)2Three-dimensional graphene foam chemical property performance afterwards
It is excellent.As shown in attached drawing 9a and 9b, when it is 5,10,20,30,40,50,60,80,100mv/s that potential, which sweeps speed, specific capacitance point
It Wei 2776.9,2428.8,2152.5,2020.6,1940.6,1882.5,1840,1768.1,1711.3F/g.Such as attached drawing 9c
Shown, when discharge current density is 3.1,4.2,5.0,6.3,9.4,18.7A/g, specific capacitance is respectively 3319.0,
2324.2,2180.5,1967.1,1885.7,1277.2F/g.The three-dimensional graphene foam for loading fake capacitance substance is assembled into
Symmetrical supercapacitor, assembling schematic diagram is as shown in attached drawing 10a, among the three-dimensional graphene foam of two pieces of load fake capacitance substances
The KOH solution diaphragm for being infiltrated 6mol/L separates, and is encapsulated in lithium battery case and symmetric form supercapacitor is made (see attached drawing
10b).Symmetrical supercapacitor series connection as two can light a red LED light bulb.The symmetrical supercapacitor shows
Excellent long-term cycle stability out, after the fast charging and discharging more than 8000 times, specific capacitance can still be maintained about 80%
Capacity (see attached drawing 10c).
Influence of the etching condition to the integrality of grapheme foam is investigated
Comparative example 1: grapheme foam is prepared using method same as Example 1, difference is to adopt water as etching liquid.
Specifically: direct etching covers with the calcium oxide template of graphene network in water, reacts excessively violent, generates a large amount of
Heat after cause solution to boil, the bubble of generation and the liquid of rolling tear grapheme foam, obtain powdered graphene.
By embodiment 1 and 1 experimental result of comparative example it is found that etching condition influences greatly grapheme foam integrality.
Big calorimetric can be generated in acid solution etching template procedure, if not in time guided the heat of generation, in etch liquids temperature
Liter is too fast, even more so that etch liquids boil, causes graphene template to burst, cannot get Complete three-dimensional grapheme foam.And it adopts
With suitable etching condition, reaction severe degree on the one hand is slowed down using ethyl alcohol, so that reaction tends towards stability；On the other hand anti-
The heat that should be generated can import in ice-water bath in time, guarantee that etching reaction carries out under conditions of gentle, finally obtain complete
Grapheme foam.
Although above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, fall within the scope of the claimed invention without departing from theon the basis of the spirit of the present invention.
Claims (9)
1. a kind of using ore as the method for template construct grapheme foam, which is characterized in that forged using chemical vapour deposition technique
Catalytic pyrolysis carbon matrix precursor in ore template after burning, forms continuous three-dimensional grapheme macroscopic body, and subsequent etching is fallen template, obtained
To three-dimensional graphene foam；
The ore is calcite, dolomite, magnesite, malachite, siderite, smithsonite, cerussite, one in chessy copper
Kind；
Gained ore template is calcined in carrier gas atmosphere high temperature, and porosity is the ore template of 90-99.6%；The carrier gas
For hydrogen, inert gas or the gaseous mixture between them；
The template etches in ice bath.
2. according to claim 1 using ore as the method for template construct grapheme foam, which is characterized in that before the carbon
Drive body is hydrocarbon.
3. according to claim 2 using ore as the method for template construct grapheme foam, which is characterized in that before the carbon
It drives body and is selected from one of methane, ethane, ethylene, acetylene, benzene, toluene, phenol, n-hexane, hexamethylene, ethyl alcohol, methanol, acetone
Or it is a variety of.
4. according to claim 1 using ore as the method for template construct grapheme foam, which is characterized in that the chemistry
The concrete technology condition of vapour deposition process are as follows: cracking temperature is 300-1200 DEG C, and duration of ventilation is -3 hours 5 minutes.
5. according to claim 1 using ore as the method for template construct grapheme foam, which is characterized in that the etching
The etching liquid of use is selected from one of aqueous solution of sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, ethyl alcohol or a variety of, and concentration is not higher than
6mol/L。
6. according to claim 1 using ore as the method for template construct grapheme foam, which is characterized in that including as follows
Step:
(1) in carrier gas atmosphere high temperature calcined ore, three-dimensional ore template is obtained；
(2) carbon matrix precursor is introduced, uses chemical vapour deposition technique catalytic pyrolysis carbon forerunner in three-dimensional ore template after firing
Body generates the three-dimensional network of graphene；
(3) by the calcined three-dimensional ore template of etching removal, grapheme foam is obtained.
7. grapheme foam made from claim 1-6 either method.
8. grapheme foam according to claim 7, which is characterized in that its specific surface area is 170-800m2/ g, density are
3-30mg/cm3, average cell size 1-50nm；Its pore-size distribution has<2nm micropore, and 2-50nm is mesoporous and>50nm macropore
Multi-level structure.
9. grapheme foam described in claim 7 or 8 turns in electrode material for super capacitor, battery electrode material, hot phase transformation
Change material, flexible electronic, sensor of chemical gas, water purification material, gas purification material, thermal management materials, enhancing composite wood
Application in material field.
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| CN115353099B (en) * | 2022-08-18 | 2023-06-30 | 西北工业大学 | Multi-boundary graphene foam with controllable porosity and pore size and preparation method thereof |
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| CN101831622A (en) * | 2010-05-20 | 2010-09-15 | 中国科学院化学研究所 | Grapheme foam and preparation method thereof |
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| CN101831622A (en) * | 2010-05-20 | 2010-09-15 | 中国科学院化学研究所 | Grapheme foam and preparation method thereof |
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| Title |
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| Scalable seashell-based chemical vapor deposition growth of three-dimensional graphene foams for oil–water separation;Shi L, et al.;《Journal of the American Chemical Society》;20160509;摘要部分、第6360页右栏-6361页左栏和图1 * |
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