CN108172793A - Centrifuge the method for preparing three-dimensional carbon foam/graphene oxide based composites - Google Patents
Centrifuge the method for preparing three-dimensional carbon foam/graphene oxide based composites Download PDFInfo
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- 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
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- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
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Abstract
It is a kind of to centrifuge the method for preparing three-dimensional carbon foam/graphene oxide based composites, it follows the steps below：(1) thermal cracking under inert atmosphere conditions after melamine resin foam is pre-processed, is made three-dimensional carbon foam framework；(2) three-dimensional carbon foam framework is immersed into graphene oxide dispersion or graphene oxide based composites dispersion liquid, squeezes the carbon foam for obtaining and being adsorbed with graphene oxide or graphene oxide based composites repeatedly；(3) it is placed in centrifuge tube or centrifugal bottle with sieve pore structure partition board, starts centrifuge, separation of solid and liquid is realized by partition board under the action of the centrifugal；(4) moisture removal is removed in the solid phase drying after detaching.The method of the present invention is simple and practicable, avoid it is harsh prepare environment, save a large amount of time, can the content of controllable adjustment graphene oxide in the composite, and can accomplish scale production；Product has good flexibility and electric conductivity.
Description
Technical field
The invention belongs to three-dimensional grapheme based composites technical fields, and in particular to a kind of centrifugation prepares three-dimensional carbon
The method of foam/graphene oxide based composites.
Background technology
Graphene is the bi-dimensional cellular shape structure being piled by single layer of carbon atom, be find so far it is most thin, conductive
Performance is best, the highest two-dimension nano materials of mechanical performance.The preparation of existing graphene or graphene oxide uses physics more
Method such as chemical vapor deposition (CVD) method and chemical method (Hummers).It is various more in order to meet the active demand of new energy field
Hole, the three-dimensional grapheme of bigger serface or its composite material are prepared out, for high-performance super capacitor, lithium-ion electric
The fields such as pond, sodium-ion battery.
At present, the preparation method of three-dimensional structure graphene mainly includes chemical vapor deposition (CVD) method, hydro-thermal method and template
Method etc..It is extremely complex that CVD method prepares three-dimensional grapheme, first to deposit to graphene on three-dimensional nickel foam, then with salt acidleach
Bubble removes metal, finally obtains three-dimensional grapheme, and this three-dimensional structure does not have good flexibility generally；Number of patent application is
201010183833.8, the Chinese patent of entitled grapheme foam and preparation method thereof discloses the preparation side of grapheme foam
Method is as follows：1) metal foaming material is put into vacuum tube furnace, and is calcined under non-oxidizing atmosphere；2) using chemistry
Vapour deposition process deposits graphene on metal foaming material after firing；3) by the metal foam of obtained graphene modified
Foam metal in material removes；Then obtained foamed material with deionized water, ethyl alcohol, ether is cleaned successively, takes out and dry
It is dry, finally obtain grapheme foam.
Hydro-thermal method, which needs graphene oxide dispersion being put into reaction kettle, is put into hydro-thermal process in 180~200 DEG C of baking ovens,
Three-dimensional grapheme hydrogel is prepared, this hydrogel, which generally requires freeze-drying, could keep good three-dimensional structure, but cold
Freeze drying process to generally require for a long time (more than for 24 hours)；Number of patent application is 201310370268.X, and entitled one kind is mesoporous
The hydro-thermal that the Chinese patent of grapheme foam and preparation method thereof discloses a kind of magnesia texture structure prepares with a kind of to knit
Structure magnesia carries out the preparation of mesoporous grapheme foam for template, which has abundant meso-hole structure
With excellent electrical properties.
Compared to first two method, template is relatively easy, need to will be on graphene or graphene oxide replica to template only
Can, such as sacrifice template and infusion process.Number of patent application is 201610992467.8, entitled to prepare graphite by chaff ketone resin
The Chinese patent of the method for alkene foamed material, grapheme foam material and application thereof discloses one kind and prepares stone by chaff ketone resin
The method of black alkene foamed material, the substance that the added non-carbon of chaff ketone resin and easy high temperature are rejected, after curing molding
High temperature cabonization and graphitization are carried out in inert gas environment, there is six sides or pentagonal two dimension or three-dimensional multi-panel so as to form one kind
The novel graphite alkene foamed material of crystalline network structures.Number of patent application is 201310292634.4, a kind of entitled three-dimensional stone
The Chinese patent of the preparation method of mertenyl foamed material is disclosed using polymeric foamed material as template, by simply impregnating
Method obtains the polymeric foamed material containing graphene oxide, and then heat treatment polymeric foam obtains three-dimensional stone under anaerobic
Mertenyl foamed material；This method can prepare the graphene-based foam macroscopic body with three-dimensional continuous structure.
In conclusion the preparation method of existing three-dimensional graphene composite material generally requires harsh environment (CVD method)
Or very long finishing time (freeze-drying of infusion process), it is difficult to realize three-dimensional grapheme or the quick preparation of its composite material
And large-scale production, especially it is difficult the three-dimensional grapheme based composites that graphene oxide content is fixed in controllable preparation.
Invention content
In order to solve the above problem existing for the technology of preparing of existing three-dimensional graphene oxide composite material, the present invention provides
It is a kind of to centrifuge the method for preparing three-dimensional carbon foam/graphene oxide based composites, by centrifugation, will aoxidize
The nanometer sheet of graphene or graphene oxide composite material is wrapped on carbon foam skeleton, quick and prepare with scale three-dimensional carbon bubble
Foam/graphene oxide based composites, can be by controlling centrifuge speed and time come controllable adjustment graphene oxide multiple
Content in condensation material.
Realize that the technical solution of the object of the invention follows the steps below：
(1) three-dimensional carbon foam framework is prepared：Melamine formaldehyde resin foam is cleaned respectively with distilled water and ethyl alcohol
Afterwards, ultrasonication in absolute ethyl alcohol is immersed in, washes off impurity, then take out drying or air-dries removal absolute ethyl alcohol, then lazy
Property atmospheric condition under, be warming up to 800~1000 DEG C with the speed of 5~10 DEG C/min, 2~5h of heat preservation carries out thermal cracking, with furnace cooling
But to room temperature, conductive three-dimensional carbon foam framework is obtained；
(2) carbon foam is adsorbed：Three-dimensional carbon foam framework is immersed into graphene oxide dispersion or graphite oxide alkenyl is answered
In condensation material dispersion liquid, 3~20min is impregnated, ensures that saturation is adsorbed by squeezing three-dimensional carbon foam framework repeatedly, is adsorbed with
The carbon foam of graphene oxide or graphene oxide based composites；A concentration of the 0.5 of the graphene oxide dispersion~
6.0mg/mL, a concentration of 0.5~6.0mg/mL of the graphene oxide based composites dispersion liquid；
(3) it centrifuges：Partition board with sieve pore structure is placed in centrifuge tube or centrifugal bottle, graphite oxide will be adsorbed with
The carbon foam of alkene or graphene oxide based composites is taken out, and is placed on the partition board of centrifuge tube or centrifugal bottle, then by centrifuge tube or
Centrifugal bottle is placed in centrifuge；Start centrifuge, separation of solid and liquid is realized by partition board under the action of the centrifugal, liquid phase is is separated
The graphene oxide dispersion or graphene oxide based composites dispersion liquid gone, solid phase for package stannic oxide/graphene nano piece or
The three-dimensional carbon foam framework of graphene oxide based composites nanometer sheet；
(4) moisture removal is removed into solid phase drying, three-dimensional carbon foam/graphene oxide based composites is made.
In the above method, the rotating speed of centrifuge is 500~10000rpm when being centrifuged, centrifugation time for 5~
20min。
In the above method, supersonic frequency during ultrasonication is 60Hz, and the time is 30~60min.
In the above method, the drying temperature of step (4) is 60~80 DEG C, and the time is 30~120min.
In the above method, three-dimensional carbon foam/graphene oxide based composites by weight percentage containing graphene oxide or
Graphene oxide based composites 3~16%.
Above-mentioned graphene oxide dispersion is the graphene oxide prepared using Hummers methods or chemical oxidation stripping
Aqueous dispersions.
Above-mentioned graphene oxide based composites dispersion liquid is to use chemical method by Nano particles of polyaniline growth in situ
Graphene oxide/dispersing polyaniline liquid in graphene oxide layer or using hydro-thermal method by metal oxide or hydrogen
The graphene oxide that oxide growth is prepared in graphene oxide layer/manganese dioxide composite material dispersion liquid, graphite oxide
Alkene/stannic hydroxide composite material dispersion liquid, graphene oxide/nickel hydroxide composite material dispersion liquid or graphene oxide/hydrogen-oxygen
Change cobalt composite material dispersion liquid.
Compared with prior art, the features of the present invention and advantageous effect are：
(1) three-dimensional carbon foam/graphene oxide based composites being prepared using centrifugal separation, method is simple and practicable, with
Traditional CVD method is compared with hydro-thermal method, can be saved a large amount of time to avoid harsh growing environment, can especially control
The content ratio of graphene oxide is adjusted, and can be accomplished scale production；
(2) it since basis material employs the three-dimensional foam of carbonization, and is wrapped on foam framework by centrifugal separation
A large amount of graphene oxide or its composite material lamella are wrapped up in；Therefore, the product of preparation have good flexibility, electric conductivity and
Hierarchical porous structure is particularly suitable for preparing ultracapacitor, lithium ion battery, the electrode material of sodium-ion battery or for inhaling
Pollutant in attached sewage includes greasy dirt, heavy metal ion etc..
Description of the drawings
Fig. 1 is the appearance photo figure of melamine formaldehyde resin foam before and after thermal cracking in the embodiment of the present invention 1；In figure
Left side is before thermal cracking, right side is after thermal cracking；
Fig. 2 is the SEM photograph figure of the three-dimensional carbon foam framework in the embodiment of the present invention 1；
Fig. 3 is the SEM photograph figure of three-dimensional carbon foam/graphene oxide based composites in the embodiment of the present invention 1；With figure
Distribution situation of the 2 more visible stannic oxide/graphene nano pieces in carbon foam skeleton.
Specific embodiment
The heating and heat preservation equipment used in the embodiment of the present invention is tube furnace.
SEM observation device model JSM-7500F scanning electron microscope (the Japan's electricity used in the embodiment of the present invention
Son).
Melamine formaldehyde resin foam in the embodiment of the present invention is commercial products.
Inert atmosphere in the embodiment of the present invention is nitrogen atmosphere or argon gas atmosphere.
Supersonic frequency in the embodiment of the present invention during ultrasonication is 60Hz, and the time is 30~60min.
Partition board is located in the middle part of centrifuge tube or centrifugal bottle in the embodiment of the present invention, and baffle surface has many sieve pores.
The rotating speed of centrifuge is 500~10000rpm when being centrifuged in the embodiment of the present invention.
The preparation method of the graphene oxide solution used in the embodiment of the present invention is：The 80mL concentrated sulfuric acids are put into round bottom to burn
It in bottle, places it in 80 DEG C of water bath with thermostatic control, adds in 15g potassium peroxydisulfates and 15g phosphorus pentoxides, magnetic agitation is until complete
Dissolving；Then 20g graphite powders are added in, continue to stir 5h；After being cooled to room temperature, filtering is washed to filtrate as neutrality, obtains pre- oxygen
Graphite；Above-mentioned pre-oxidation graphite powder is added in the 800ml concentrated sulfuric acids, reactor is placed on the ice-water bath that temperature is no more than 5 DEG C
In, it is stirred evenly after adding in 100g potassium permanganate；Then reactor is transferred to continuation magnetic agitation 2h in 30 DEG C of waters bath with thermostatic control,
It is then transferred in ice-water bath of the temperature no more than 5 DEG C, adds in water and material is diluted to total volume as 4L, be slowly added to the weight of 90mL
Measure the H of concentration 38%2O2Afterwards, uniform orange suspension is generated；Generation precipitation is stood overnight, outwells supernatant, precipitation is filtered
Filtrate is washed to as neutrality, is finally centrifugally separating to obtain the graphite oxide of concentration；The graphite oxide deionized water of concentration is dilute
After releasing 500mL, continuous ultrasonic processing 4h stripping graphite oxides obtain graphene oxide water solution, are measured using desivac dense
It spends for 8.0mg/mL；The graphene oxide water solution adds water to adjust the graphene oxide that concentration prepares required concentration in embodiment
Dispersion liquid.
Illustrate the specific embodiment of the invention with reference to embodiment, embodiments of the present invention are not limited only to embodiment
The content.
Embodiment 1
A concentration of 3.0mg/mL of the graphene oxide dispersion of use：
After melamine formaldehyde resin foam is cleaned respectively with distilled water and ethyl alcohol, it is immersed in absolute ethyl alcohol ultrasonic
Wave processing, washes off impurity, then takes out and air-dries removal absolute ethyl alcohol, then under inert atmosphere conditions, with the speed liter of 5 DEG C/min
For temperature to 800 DEG C, heat preservation 5h carries out thermal cracking, cools to room temperature with the furnace, obtains conductive three-dimensional carbon foam framework；Before and after thermal cracking
Appearance photo it is as shown in Figure 1；The SEM photograph of three-dimensional carbon foam framework is as shown in Figure 2；
Three-dimensional carbon foam framework is immersed into graphene oxide dispersion, 20min is impregnated, by squeezing three-dimensional carbon repeatedly
Foam framework ensures saturation absorption, obtains the carbon foam for being adsorbed with graphene oxide；
Partition board with sieve pore structure is placed in centrifuge tube or centrifugal bottle, graphene oxide or graphite oxide will be adsorbed with
The carbon foam of alkenyl composite material is taken out, and is placed on the partition board of centrifuge tube or centrifugal bottle, then by centrifuge tube or centrifugal bottle be placed in from
In scheming；Starting centrifuge, separation of solid and liquid is realized by partition board under the action of the centrifugal, the rotating speed of centrifuge is 10000rpm, from
The heart time is 5min；Liquid phase is the graphene oxide dispersion being separated, and solid phase is package stannic oxide/graphene nano piece
Three-dimensional carbon foam framework dries 60min by its 60 DEG C, three-dimensional carbon foam/graphene oxide based composites is made；Percentage by weight
Than containing graphene oxide 3%；SEM photograph is as shown in Figure 3.
Embodiment 2
With embodiment 1, difference is method：
(1) a concentration of 2.0mg/mL of graphene oxide dispersion；
(2) 1000 DEG C are warming up to the speed of 10 DEG C/min, heat preservation 2h is cracked；
(3) soaking time 10min；
(4) rotating speed of centrifuge is 2000rpm, centrifugation time 10min；
(5) solid phase dries 30min at 80 DEG C, by weight percentage containing graphene oxide 9%.
Embodiment 3
With embodiment 1, difference is method：
(1) a concentration of 6.0mg/mL of graphene oxide dispersion；
(2) 900 DEG C are warming up to the speed of 8 DEG C/min, heat preservation 3h is cracked；
(3) soaking time 3min；
(4) rotating speed of centrifuge is 500rpm, centrifugation time 20min；
(5) solid phase dries 45min at 70 DEG C, by weight percentage containing graphene oxide 16%.
Embodiment 4
The graphene oxide based composites dispersion liquid used is graphene oxide/a concentration of 3.5mg/ of dispersing polyaniline liquid
ML, preparation method are：
The graphene oxide solution of the hydrochloric acid of 10mL concentration 2mol/L and 10mL concentration 6mg/mL are mixed and stirred for uniformly,
It adds in the aniline of 1mL and stirs evenly as solution A；0.93g ammonium persulfates are dissolved in the hydrochloric acid of 20mL concentration 1mol/L simultaneously
It stirs evenly as B solution；A, B solution are respectively put into ice water of the temperature no more than 5 DEG C and cool down 10min, then by B solution
It pours into be put into ice-water bath of the temperature no more than 5 DEG C after stirring 2min in solution A and stands reaction for 24 hours, reaction end centrifugation and water
Filtrate is washed till as neutrality, water is then added to be made into graphene oxide/dispersing polyaniline liquid of 3.5mg/mL；
After melamine formaldehyde resin foam is cleaned respectively with distilled water and ethyl alcohol, it is immersed in absolute ethyl alcohol ultrasonic
Wave processing, washes off impurity, then takes out and air-dries removal absolute ethyl alcohol, then under inert atmosphere conditions, with the speed of 5~10 DEG C/min
Degree is warming up to 800 DEG C, and heat preservation 5h carries out thermal cracking, cools to room temperature with the furnace, obtains conductive three-dimensional carbon foam framework；
Three-dimensional carbon foam framework is immersed into graphene oxide/dispersing polyaniline liquid, 3min is impregnated, by squeezing repeatedly
Three-dimensional carbon foam framework ensures saturation absorption, obtains the carbon foam for being adsorbed with graphene oxide based composites；
Partition board with sieve pore structure is placed in centrifuge tube or centrifugal bottle, graphene oxide based composites will be adsorbed with
Carbon foam take out, be placed on the partition board of centrifuge tube or centrifugal bottle, then centrifuge tube or centrifugal bottle are placed in centrifuge；Start from
Scheming realizes separation of solid and liquid by partition board under the action of the centrifugal, and the rotating speed of centrifuge is 7000rpm, centrifugation time 5min；Liquid
It is mutually the graphene oxide based composites dispersion liquid being separated, solid phase is package graphene oxide based composites nanometer
The three-dimensional carbon foam framework of piece.120min is dried by its 60 DEG C, three-dimensional carbon foam/graphene oxide based composites are made；By weight
Measure percentage alkenyl containing graphite oxide composite material 5.3%.
Embodiment 5
The graphene oxide based composites dispersion liquid used is for graphene oxide/manganese dioxide dispersion liquid concentration
4.0mg/mL, preparation method are：
60mg potassium permanganate is added to ultrasonication 5min in 50mL concentration 2.0mg/mL graphene oxide water solutions
Afterwards, magnetic agitation 30min makes it be uniformly dispersed, and is then placed in ptfe autoclave, in 150 DEG C of baking ovens at hydro-thermal
Manage 12h, centrifuge after natural cooling, solid phase is washed three times, then plus water be made into the graphene oxide of a concentration of 4.0mg/mL/
Manganese dioxide dispersion liquid；
With embodiment 4, difference is rest part：
(1) 850 DEG C being warming up to the speed of 5~10 DEG C/min, heat preservation 4.5h carries out thermal cracking,
(2) three-dimensional carbon foam framework is immersed into graphene oxide/manganese dioxide dispersion liquid, soaking time 5min；
(3) rotating speed of centrifuge is 8000rpm, centrifugation time 8min；
(4) solid phase dries 50min, the by weight percentage composite material of alkenyl containing graphite oxide 5% at 65 DEG C.
Embodiment 6
The graphene oxide based composites dispersion liquid used is for graphene oxide/stannic hydroxide dispersion liquid concentration
4.5mg/mL, preparation method are：
90mg sodium stannate trihydrates are added in the graphene oxide water solution of 40mL concentration 3mg/mL and are ultrasonically treated 5min
Afterwards, then magnetic agitation 30min adds in 120mg urea and continues to be ultrasonically treated 5min, it is made to be uniformly dispersed, places into polytetrafluoro
In ethylene reaction kettle, hydro-thermal process for 24 hours, centrifuges after natural cooling in 180 DEG C of baking ovens, and solid phase is washed to during filtrate is
Property, water is then added to be made into graphene oxide/stannic hydroxide dispersion liquid of a concentration of 4.5mg/mL.
With embodiment 4, difference is rest part：
(1) 1000 DEG C being warming up to the speed of 5~10 DEG C/min, heat preservation 3h carries out thermal cracking,
(2) three-dimensional carbon foam framework is immersed into graphene oxide/stannic hydroxide dispersion liquid, soaking time 15min；
(3) rotating speed of centrifuge is 2000rpm, centrifugation time 15min；
(4) solid phase dries 30min, the by weight percentage composite material of alkenyl containing graphite oxide 12% at 80 DEG C.
Embodiment 7
The graphene oxide based composites dispersion liquid used is for graphene oxide/nickel hydroxide dispersion liquid concentration
5.0mg/mL, preparation method are：
70mg Nickelous nitrate hexahydrates are added in 50mL concentration 2.5mg/mL graphene oxide water solutions, ultrasonication
Then magnetic agitation 30min after 5min adds in 60mg urea and continues ultrasonication 10min, it is made to be uniformly dispersed, is then placed in
In ptfe autoclave, the hydro-thermal process 12h in 160 DEG C of baking ovens is centrifuged after natural cooling, and solid phase is washed to filtrate
For neutrality, water is then added to be made into graphene oxide/nickel hydroxide dispersion liquid of a concentration of 5.0mg/mL；
With embodiment 4, difference is rest part：
(1) 950 DEG C being warming up to the speed of 5~10 DEG C/min, heat preservation 2.5h carries out thermal cracking,
(2) three-dimensional carbon foam framework is immersed into graphene oxide/nickel hydroxide dispersion liquid, soaking time 18min；
(3) rotating speed of centrifuge is 1000rpm, centrifugation time 18min；
(4) solid phase dries 40min, the by weight percentage composite material of alkenyl containing graphite oxide 13% at 75 DEG C.
Embodiment 8
The graphene oxide based composites dispersion liquid used is for graphene oxide/cobalt hydroxide dispersion liquid concentration
6.0mg/mL, preparation method are：
Tetra- acetate hydrate cobalts of 80mg are added in 60mL concentration 2.0mg/mL graphene oxide water solutions, ultrasonication
Then magnetic agitation 30min after 5min adds in 120mg hexamethylenetetramines and continues ultrasonication 5min, it is made to be uniformly dispersed,
It places into ptfe autoclave, the hydro-thermal process 10h in 150 DEG C of baking ovens, is centrifuged after natural cooling, solid phase washing
It is neutrality to filtrate, water is then added to be made into the dispersion liquid of a concentration of 6.0mg/mL；
With embodiment 4, difference is rest part：
(1) 900 DEG C being warming up to the speed of 5~10 DEG C/min, heat preservation 2h carries out thermal cracking,
(2) three-dimensional carbon foam framework is immersed into graphene oxide/cobalt hydroxide dispersion liquid, soaking time 20min；
(3) rotating speed of centrifuge is 500rpm, centrifugation time 20min；
(4) solid phase dries 50min, the by weight percentage composite material of alkenyl containing graphite oxide 16% at 70 DEG C.
Claims (6)
1. a kind of centrifuge the method for preparing three-dimensional carbon foam/graphene oxide based composites, it is characterised in that according to
Lower step carries out：
(1) three-dimensional carbon foam framework is prepared：After melamine formaldehyde resin foam is cleaned respectively with distilled water and ethyl alcohol, leaching
The not ultrasonication in absolute ethyl alcohol, washes off impurity, then takes out drying or air-dries removal absolute ethyl alcohol, then in inert atmosphere
Under the conditions of, 800~1000 DEG C are warming up to the speed of 5~10 DEG C/min, 2~5h of heat preservation carries out thermal cracking, cools to the furnace often
Temperature prepares conductive three-dimensional carbon foam framework；
(2) carbon foam is adsorbed：Three-dimensional carbon foam framework is immersed into graphene oxide dispersion or graphite oxide alkenyl composite wood
Expect in dispersion liquid, impregnate 3~20min, ensure that saturation is adsorbed by squeezing three-dimensional carbon foam framework repeatedly, acquisition is adsorbed with oxidation
The carbon foam of graphene or graphene oxide based composites；A concentration of the 0.5 of the graphene oxide dispersion~
6.0mg/mL, a concentration of 0.5~6.0mg/mL of the graphene oxide based composites dispersion liquid；
(3) it centrifuges：Partition board with sieve pore structure is placed in centrifuge tube or centrifugal bottle, will be adsorbed with graphene oxide or
The carbon foams of graphene oxide based composites is taken out, and is placed on the partition board of centrifuge tube or centrifugal bottle, then by centrifuge tube or centrifugation
Bottle is placed in centrifuge；Start centrifuge, separation of solid and liquid is realized by partition board under the action of the centrifugal, liquid phase is separated
Graphene oxide dispersion or graphene oxide based composites dispersion liquid, solid phase are package stannic oxide/graphene nano piece or oxidation
The three-dimensional carbon foam framework of graphene-based composite material nanometer piece；
(4) moisture removal is removed into solid phase drying, three-dimensional carbon foam/graphene oxide based composites is made.
2. a kind of side for centrifuging the three-dimensional carbon foam/graphene oxide based composites of preparation according to claim 1
Method, it is characterised in that the rotating speed of centrifuge is 500~10000rpm when being centrifuged, and centrifugation time is 5~20min.
3. a kind of side for centrifuging the three-dimensional carbon foam/graphene oxide based composites of preparation according to claim 1
Method, it is characterised in that the drying temperature of step (4) is 60~80 DEG C, and the time is 30~120min.
4. a kind of side for centrifuging the three-dimensional carbon foam/graphene oxide based composites of preparation according to claim 1
Method, it is characterised in that the three-dimensional carbon foam/graphene oxide based composites by weight percentage containing graphene oxide or
Graphene oxide based composites 3~16%.
5. a kind of side for centrifuging the three-dimensional carbon foam/graphene oxide based composites of preparation according to claim 1
Method, it is characterised in that the graphene oxide dispersion is the aqueous dispersions of the graphene oxide prepared using Hummers methods.
6. a kind of side for centrifuging the three-dimensional carbon foam/graphene oxide based composites of preparation according to claim 1
Method, it is characterised in that the graphene oxide based composites dispersion liquid is using chemical method that Nano particles of polyaniline is in situ
Graphene oxide/dispersing polyaniline liquid for being grown in graphene oxide layer or using hydro-thermal method by metal oxide
Or hydroxide is grown in the graphene oxide/manganese dioxide composite material dispersion liquid prepared in graphene oxide layer, oxidation
Graphene/stannic hydroxide composite material dispersion liquid, graphene oxide/nickel hydroxide composite material dispersion liquid or graphene oxide/
Cobalt hydroxide composite material dispersion liquid.
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