CN106495134A - Three-dimensional porous graphene and preparation method thereof - Google Patents

Three-dimensional porous graphene and preparation method thereof Download PDF

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Publication number
CN106495134A
CN106495134A CN201611002194.4A CN201611002194A CN106495134A CN 106495134 A CN106495134 A CN 106495134A CN 201611002194 A CN201611002194 A CN 201611002194A CN 106495134 A CN106495134 A CN 106495134A
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resin
dimensional porous
heating
transition
ion
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CN106495134B (en
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赵祖珍
徐永进
沈洋
南策文
袁美荣
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Shenzhen Research Institute Tsinghua University
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    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00Crystal-structural characteristics
    • C01P2002/70Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72Crystal-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
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00Crystal-structural characteristics
    • C01P2002/80Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
    • C01P2002/82Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by IR- or Raman-data
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
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    • C01P2004/03Particle morphology depicted by an image obtained by SEM

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Abstract

The present invention relates to a kind of preparation method of three-dimensional porous Graphene, comprises the following steps:Ion-exchange type resin is carried out ion exchange with the solution of transition-containing metal ion and obtains transition-containing metal ion crossover resin;The transition-containing metal ion crossover resin is dried process;The dried transition-containing metal ion crossover resin and solid base are mixed to get mixture;Heating is carried out to the mixture using intermittent microwave heating and obtains carbide resin;After acid neutralization is added in the carbide resin obtain three-dimensional porous Graphene.Above-mentioned preparation method raw material are easy to get, production equipment is simple, and operation is simple, it is to avoid prepare three-dimensional grapheme material using particular device, and production cost is substantially reduced.

Description

Three-dimensional porous Graphene and preparation method thereof
Technical field
The present invention relates to technical field of graphene preparation, more particularly to a kind of three-dimensional porous Graphene and its preparation side Method.
Background technology
Graphene (Graphene) be by carbon atom tightly packed into individual layer two dimension (2D) carbonaceous material.Graphene due to Extensively concerned with performances such as fabulous electricity, optics, machineries.At present, mechanical stripping method, epitaxial growth method, chemical gaseous phase After sedimentation, chemical reduction method etc. can prepare Graphene (Graphene G or electronation graphene oxide rGO) and its functionalization Derivative.
Three-dimensional (3D) Graphene typically refers to two dimension (2D) the Graphene assembly with 3D structures, is Graphene in recent years The new type functional material of chemical field.The physicochemical property that 3D grapheme materials not only have Graphene intrinsic, which is three-dimensional porous Micro/nano structure also to make which have that specific surface area big, high mechanical strength, electronic conduction ability be superior and mass transfer is quick concurrently etc. excellent Characteristic.These unique properties make 3D Graphenes and its composite receive much concern in material science.Integrate 2D Graphenes The Graphene assembly with specific three dimensional (3D) structure is built, and then the excellent function element of processability is for expansion graphite The macroscopic view application of alkene is significant.
At present, preparing the conventional method of 3D Graphenes has the hot method of directed flow construction from part, solvent/water, substrate interface assembling Method and chemical vapour deposition technique.However, the cost for 3D Graphenes being prepared by said method is general higher, limit which and develop.
Content of the invention
Be based on this, it is necessary to the problem of the method high cost of three-dimensional grapheme is prepared for tradition, there is provided a kind of three-dimensional many Hole Graphene and preparation method thereof.
A kind of preparation method of three-dimensional porous Graphene, comprises the following steps:
Ion-exchange type resin is carried out ion exchange with the solution of transition-containing metal ion and obtains transition-containing metal ion Crossover resin;
The transition-containing metal ion crossover resin is dried process;
The dried transition-containing metal ion crossover resin and solid base are mixed to get mixture;
Heating is carried out to the mixture using intermittent microwave heating and obtains carbide resin;And
After acid neutralization is added in the carbide resin obtain three-dimensional porous Graphene.
Wherein in one embodiment, the ion-exchange type resin be cation exchange resin, the transition metal At least one of the ion in iron ion, nickel ion and cobalt ions.
Wherein in one embodiment, the quality of the ion-exchange type resin and the solution of the transition-containing metal ion CEC<4.50mmol/g.
Wherein in one embodiment, at least one of the solid base in NaOH and potassium hydroxide.
Wherein in one embodiment, the transition-containing metal ion crossover resin and solid base by after the drying In the step of being mixed to get mixture, the transition-containing metal ion crossover resin after the drying with the volume ratio of solid base is 1:4~1:10.
Wherein in one embodiment, described the mixture is carried out heating by intermittent microwave heating obtain carbonization The step of resin, specifically includes:
The mixture is put into the first container, first container has protection cap;
First container is positioned in second container, activated carbon in the second container, is filled;
The second container is heated using intermittent microwave heating.
Wherein in one embodiment, described heating is carried out to the mixture using intermittent microwave heating obtain carbonization In the step of resin, each heat time is 2min~8min, and alternately the time interval of heating is 10s~50s, the number of times of heating For 2~30 times.
Wherein in one embodiment, described heating is carried out to the mixture using intermittent microwave heating obtain carbonization In the step of resin, the power of heating is 800W~1500W.
Wherein in one embodiment, the acid is at least one in hydrochloric acid and sulfuric acid.
A kind of three-dimensional porous Graphene, is obtained according to the preparation method of above-mentioned three-dimensional porous Graphene.
The preparation method of above-mentioned three-dimensional porous Graphene by the way of heating using microwave, first by ion-exchange type resin with The solution of transition-containing metal ion carries out ion exchange and obtains transition-containing metal ion crossover resin, by transition-containing metal ion Crossover resin is dried, then is mixed to get mixture with solid base, mixture is carried out by the method for alternate microwave heating plus Heat obtains carbide resin, and washing and drying after carbide resin acid neutralization is obtained three-dimensional porous grapheme material, preparation side Method raw material are easy to get, production equipment is simple, and operation is simple, it is to avoid prepare three-dimensional grapheme material using particular device, Production cost is substantially reduced.
Description of the drawings
Fig. 1 is the process chart of the preparation method of the three-dimensional porous Graphene of an embodiment;
Raman spectrograms of the Fig. 2 for the three-dimensional porous Graphene of embodiment 1;
X-ray diffraction spectrograms of the Fig. 3 for the three-dimensional porous Graphene of embodiment 1;
Stereoscan photographs of the Fig. 4 for the three-dimensional porous Graphene of embodiment 1.
Specific embodiment
Three-dimensional porous Graphene and preparation method thereof is carried out further below in conjunction with specific embodiment and accompanying drawing Explanation.
Fig. 1 is referred to, the preparation method of the three-dimensional porous Graphene of an embodiment is comprised the following steps:
Step S10, the solution of ion-exchange type resin and transition-containing metal ion is carried out ion exchange obtain containing transition Metal ion exchanged type resin.
Wherein in an embodiment, ion-exchange type resin specifically cation exchange resin mainly includes benzene Ethene system and acrylic acid series this two big series, additionally, ion-exchange type resin can be to be made up of other organic monomers polymerizations, such as Phenolic aldehyde system, epoxy, vinylpyridine system and ureaformaldehyde system etc..Wherein in an embodiment, the particle diameter of ion-exchange type resin For 1~5cm, ion-exchange type cross-linkage of resin is 80~90%.
In the solution of transition-containing metal ion, transition metal ions is selected from the iron ion, nickel ion and cobalt with catalytic property At least one in ion.Resin can obtain grapheme material by heating under the catalytic action of transition metal.Contain transition The anions of metal ion are selected from SO4 2-、SiO3 2-、PO4 3-、CO3 2-、SO3 2-、S2O3 2-、S2-、Cl-、Br-、I-、NO3 -、 NO2 -In at least one, it is believed that as long as the anion in solution can be formed with transition metal ions water-soluble strong Electrolytic salt.The concentration of the solution of transition-containing metal ion is 0.01mol/L~10mol/L, specifically, Ke Yishi 0.1mol/L~10mol/L.
When the solution of ion-exchange type resin and transition-containing metal ion is carried out ion exchange, ion-exchange type resin with The quality CEC of the solution of transition-containing metal ion<4.50mmol/g.Under this condition, ion-exchange reactions can be with Fully carry out.Specifically, ion-exchange type resin is placed in exchange column, then keeps certain flow velocity to lead to in ion exchange column Enter transition-containing metal ion solution, the reaction condition for carrying out ion-exchange reactions is:The pH of transition-containing metal ion solution be 0~ 14;Maximum operation (service) temperature:Hydrogen≤100 DEG C, sodium form≤120 DEG C;Transition expansion rate %:(Na+→H+)≤10;Work is exchanged to be held Amount:>=1000mmol/l (wet);The height of ion-exchange reactions exchange column:50cm;Time:About 30 minutes;Operation flow velocity:10 M/h~45 ms/h.
Step S20, transition-containing metal ion crossover resin is dried process.
Wherein in an embodiment, it is which is dried in vacuum to transition-containing metal ion crossover resin dried process Dry in case.Vacuum is less than 0.1~0.5 atmospheric pressure, and the temperature of drying and processing is 60 DEG C~150 DEG C, drying and processing when Between be 3~24 hours, time of specific drying and processing is 12~24 hours.In another embodiment, to containing transition Metal ion exchanged type resin dried process may be used also
So that using drying naturally or infrared drying, during using infrared drying, penetration power is strong, rate of drying Hurry up.
Step S30, by drying after transition-containing metal ion crossover resin and solid base be mixed to get mixture.
Wherein in an embodiment, at least one of the solid base in NaOH and potassium hydroxide.Contain transition Metal ion exchanged type resin is 1 with the volume ratio of solid base:4~1:10.By transition-containing metal ion crossover resin with solid State alkali is mixed the churned mechanically mode that mainly adopt so that both are sufficiently mixed uniformly.
Step S40, mixture is carried out heating by intermittent microwave heating obtain carbide resin.
Wherein in an embodiment, when alternate microwave heating is carried out to mixture, mixture is put into first first In container, mixture is not more than 80% in the ratio of the first vessel volume;First container has protection cap, can be located at first On container, play a part of sealing and starvation, protection mixture is not oxidized.First container is positioned over second container In, specifically, the first volume of a container is placed on the first container in second container less than 1/3rd of second container volume Afterwards, in second container, filling absorbent charcoal material is filled up to container.Specifically, the first container and second container can be crucible or Person's aluminium-foil containers.
Wherein in an embodiment, when carrying out alternate microwave heating to mixture, the time of heating is 2min every time ~8min, alternately the time interval of heating is 10s~50s, and the number of times of heating is 2~30 times.Just have when carrying out heating using microwave micro- Ripple stove is heated, and the power of heating using microwave is 800W~1500W.By the way of heating using microwave, than used by conventional method Time greatly reduces, and reaction rate is improved.And the characteristic using cationic exchange resin adsorption filtering metal ion, and using friendship For the 3D loose structures that microwave heating method can retain cationic ion-exchange resin to greatest extent.Meanwhile, in the effect of solid base Under, be conducive to separating carbon-coating, so as to prepare 3D porous graphene materials.
Step S50, in carbide resin add acid neutralization after obtain three-dimensional porous Graphene.
Wherein in an embodiment, in carbide resin, acid neutralization is added specifically to adopt in hydrochloric acid and sulfuric acid at least One kind, the concentration of the acid for being used is 0.1mol L-1~4mol L-1.Carry out sour neutralisation treatment to obtain to carbide resin for neutrality Three-dimensional porous Graphene.Add sour neutralisation treatment to be mainly used for neutralizing the highly basic in material, make three-dimensional porous Graphene Three-dimensional structure shows.
In another embodiment, after be neutralized carbide resin acid, then washed with water, it is right to generally require Carbide resin carries out repeatedly washing with the impurity in carbide resin of going out.After the completion of washing, by way of centrifugation or suction filtration Carbide resin and water are separated, then isolated carbide resin is dried process.Carbide resin is dried Processing can be carried out in convection oven or vacuum drying oven, carry out drying and processing, it is also possible to by drying in the air naturally below 180 DEG C The mode of dry or infrared drying.By said method, using solid base and transition-containing metal ion crossover mixed with resin Three-dimensional porous Graphene is prepared, acid is reused and is neutralized process, also reduce the usage amount of bronsted lowry acids and bases bronsted lowry, environmental pollution is little.
The preparation method of above-mentioned three-dimensional porous Graphene by the way of heating using microwave, first by ion-exchange type resin with The solution of transition-containing metal ion carries out ion exchange and obtains transition-containing metal ion crossover resin, by transition-containing metal ion Crossover resin is dried, then is mixed to get mixture with solid base, mixture is carried out by the method for alternate microwave heating plus Heat obtains carbide resin, and washing and drying after carbide resin acid neutralization is obtained three-dimensional porous grapheme material, preparation side Method raw material are easy to get, production equipment is simple, and operation is simple, it is to avoid prepare three-dimensional grapheme material using particular device, Production cost is substantially reduced.
Meanwhile, three-dimensional porous Graphene high income is prepared by said method, more than 60% yield can be reached.
It is specific embodiment part below.
Raw material information used in specific embodiment such as table 1:
Table 1
Embodiment 1
Take 100g cation exchanges resin I fully to exchange with 10L 0.1mol/L nickel chloride solutions, obtain containing nickel from The exchanger resin of son, cation exchange resin I are 100g with the quality CEC of nickel chloride solution.After fully exchanging The exchanger resin containing nickel ion be put into vacuum drying oven and be vacuum dried 12 hours, the temperature of vacuum drying oven is 60 degree, will drying The rear exchanger resin containing nickel ion and NaOH by volume 1:5 ratio is sufficiently mixed by mechanical agitation, mechanical agitation Time be 1h, speed is 1000rpm.Said mixture is put into the crucible that capacity is 300mL, protection cap is covered, by this earthenware Crucible is put in the crucible that another capacity is 1000mL, and is filled up inside 1000mL crucibles with activated carbon.Big crucible is put into family expenses 1500W power microwave stoves are heated by intermittent microwave heating, and heating schedule is heating 2 minutes every time, the time interval of heating For 30 seconds, heating times were 30 times, obtain carbide resin.After cooling 3 hours, carbide resin is put into 1000mL beakers and is passed through 1mol/L sulfuric acid is neutralized to neutrality, is then washed with deionized suction filtration, after 180 DEG C of vacuum drying ovens are dried obtains 3D porous classes Grapheme material.
Embodiment 2
Take 10g cation exchanges resin II fully to exchange with 10L 1mol/L copperas solutions, obtain containing ferrous iron The exchanger resin of ion, cation exchange resin II are 10g with the quality CEC of copperas solution.Fully will hand over The resin containing ferrous ion after changing is put into vacuum drying oven and is vacuum dried 24 hours, and the temperature of vacuum drying oven is 80 degree, will dry The resin containing ferrous ion after dry and KOH by volume 1:10 ratio is sufficiently mixed by mechanical agitation, mechanical agitation Time be 2h, speed is 800rpm.Said mixture is put into the crucible that capacity is 30mL, protection cap is covered, by this crucible It is put in the crucible that another capacity is 100mL, and is filled up inside 100mL crucibles with activated carbon.Big crucible is put into family expenses 800W Power microwave stove is heated by intermittent microwave method, and heating schedule is heating 5 minutes every time, and the time interval of heating is 10 seconds, plus Hot number of times is 10 times, obtains carbide resin.After cooling 3 hours, carbide resin is put into 100mL beakers by 0.5mol/L hydrochloric acid Neutralization acid is neutral, is then washed with deionized suction filtration, after 100 DEG C of vacuum drying ovens are dried obtains 3D porous class Graphene materials Material.
Embodiment 3
Take 1g cation exchanges resin II fully to exchange with 1L 1mol/L cobalt nitrate solutions, obtain containing cobalt ions Exchanger resin, cation exchange resin II are 1g with the quality CEC of cobalt nitrate solution.Containing after fully exchanging The exchanger resin for having cobalt ions is put into vacuum drying oven and is vacuum dried 24 hours, and the temperature of vacuum drying oven is 100 degree, by drying after Exchanger resin containing cobalt ions and KOH by volume 1:4 ratio is sufficiently mixed by mechanical agitation, the churned mechanically time For 3h, speed is 500rpm.Said mixture is put into the crucible that capacity is 20mL, protection cap is covered, this crucible is put into separately During one capacity is for the crucible of 100mL, and filled up inside 100mL crucibles with activated carbon.Big crucible is put into family expenses 800W power micro- Ripple stove is heated by intermittent microwave method, and heating schedule is heating 8 minutes every time, and the time interval of heating is 50 seconds, heating times For 2 times, carbide resin is obtained.After cooling 3 hours, carbide resin is put into 100mL beakers by the acid neutralization of 0.5mol/L sulfuric acid Sour neutral, suction filtration is then washed with deionized, after 90 DEG C of vacuum drying ovens are dried, obtains 3D porous class grapheme materials.
The Raman spectrogram of the three-dimensional porous Graphene of embodiment 1 is illustrated in figure 2, it can be seen that at two The G bands at the G peaks of~1580cm-1 and in~2700cm-1 are most significantly characterized in that, show to have synthesized three-dimensional porous Graphene material Material.
The X-ray diffraction spectrogram of the three-dimensional porous Graphene of embodiment 1 is illustrated in figure 3, it can be seen that occurring The characteristic peak of multi-layer graphene, further demonstrates that and has synthesized three-dimensional porous grapheme material.
The stereoscan photograph of the three-dimensional porous Graphene of embodiment 1 is illustrated in figure 4, can be with from stereoscan photograph Find out that Graphene has three-dimensional structure.
Each technical characteristic of embodiment described above arbitrarily can be combined, for making description succinct, not to above-mentioned reality Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously Therefore can not be construed as limiting the scope of the patent.It should be pointed out that for one of ordinary skill in the art Say, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the protection of the present invention Scope.Therefore, the protection domain of patent of the present invention should be defined by claims.

Claims (10)

1. a kind of preparation method of three-dimensional porous Graphene, it is characterised in that comprise the following steps:
Ion-exchange type resin is carried out ion exchange with the solution of transition-containing metal ion and obtains transition-containing metal ion exchange Type resin;
The transition-containing metal ion crossover resin is dried process;
The dried transition-containing metal ion crossover resin and solid base are mixed to get mixture;
Heating is carried out to the mixture using intermittent microwave heating and obtains carbide resin;And
After acid neutralization is added in the carbide resin obtain three-dimensional porous Graphene.
2. the preparation method of three-dimensional porous Graphene according to claim 1, it is characterised in that the ion-exchange type tree Fat is cation exchange resin, at least one of the transition metal ions in iron ion, nickel ion and the cobalt ions.
3. the preparation method of three-dimensional porous Graphene according to claim 1, it is characterised in that the ion-exchange type tree The quality CEC of fat and the solution of the transition-containing metal ion<4.50mmol/g.
4. the preparation method of three-dimensional porous Graphene according to claim 1, it is characterised in that the solid base is selected from hydrogen At least one in sodium oxide molybdena and potassium hydroxide.
5. the preparation method of three-dimensional porous Graphene according to claim 1, it is characterised in that described by the drying after Transition-containing metal ion crossover resin and solid base the step of be mixed to get mixture in, after the drying containing transition gold Category ion-exchange type resin is 1 with the volume ratio of solid base:4~1:10.
6. the preparation method of three-dimensional porous Graphene according to claim 1, it is characterised in that described by the mixture The step of heating obtains carbide resin is carried out by intermittent microwave heating to specifically include:
The mixture is put into the first container, first container has protection cap;
First container is positioned in second container, activated carbon in the second container, is filled;
The second container is heated using intermittent microwave heating.
7. the preparation method of three-dimensional porous Graphene according to claim 1, it is characterised in that the employing intermittent microwave During heating is carried out the step of heating obtains carbide resin to the mixture, each heat time is 2min~8min, alternately The time interval of heating is 10s~50s, and the number of times of heating is 2~30 times.
8. the preparation method of three-dimensional porous Graphene according to claim 1, it is characterised in that the employing intermittent microwave During heating is carried out the step of heating obtains carbide resin to the mixture, the power of heating is 800W~1500W.
9. the preparation method of three-dimensional porous Graphene according to claim 1, it is characterised in that the acid is hydrochloric acid and sulphur At least one in acid.
10. a kind of three-dimensional porous Graphene, it is characterised in that the three-dimensional porous graphite according to any one of claim 1~9 The preparation method of alkene is obtained.
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CN113752640A (en) * 2021-09-10 2021-12-07 山西新华防化装备研究院有限公司 Lightweight electromagnetic shielding tarpaulin and preparation method thereof
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CN113752640A (en) * 2021-09-10 2021-12-07 山西新华防化装备研究院有限公司 Lightweight electromagnetic shielding tarpaulin and preparation method thereof
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