CN105753113A - Graphene melamine foam compound membrane capacitor deionized electrode and preparation method thereof - Google Patents
Graphene melamine foam compound membrane capacitor deionized electrode and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
- C02F1/4691—Capacitive deionisation
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- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
本发明公开了一种石墨烯密胺泡沫复合型膜电容去离子电极及其制备方法，属于电容去离子技术领域。制备方法以密胺泡沫为模板吸附氧化石墨烯水溶液，然后通过高温煅烧得到氮掺杂的三维多孔石墨烯材料。并在石墨烯密胺泡沫复合材料上涂覆上戊二醛交联的季胺化聚乙烯醇聚合物作为阴离子交换膜。本发明制备工艺简单，条件可控，常温常压下操作。电极的比电容大、盐吸附效率高、稳定循环性好，非常适宜工业化生产。
The invention discloses a graphene melamine foam composite membrane capacitive deionization electrode and a preparation method thereof, belonging to the technical field of capacitive deionization. The preparation method uses melamine foam as a template to adsorb graphene oxide aqueous solution, and then obtains a nitrogen-doped three-dimensional porous graphene material through high-temperature calcination. And the quaternized polyvinyl alcohol polymer cross-linked by glutaraldehyde is coated on the graphene melamine foam composite material as an anion exchange membrane. The preparation process of the invention is simple, the conditions are controllable, and the preparation is operated under normal temperature and pressure. The electrode has large specific capacitance, high salt adsorption efficiency, good stability and cycle performance, and is very suitable for industrial production.
Description
Technical field
The present invention relates to capacitive deionization technical field, be specifically related to a kind of Graphene melamine foams composite membrane capacitive deionization electrode and preparation method thereof.
Background technology
Along with the high speed development of World Economics and industry, facing mankind the lot of challenges of energy scarcity and environmental pollution.Especially water resources crisis, has badly influenced the development of a lot of country.And water is not replaceable natural resources and strategic resources, it it is one of the mainstay of society's sustainable development.In view of sea water reserves are abnormal abundant, desalination technology development potentiality is very big.From the sea water accounting for the total moisture storage capacity in the world 96%, how to obtain one of cheap fresh water important channel becoming solution shortage of fresh water.Capacitive deionization (Capacitivedeionization, CDI), is a kind of electro-adsorption desalting technology based on electrochemical double-layer capacitor theory.Its basic thought is that under the effect of electrostatic field, in solution, conductance ion can be forced to move to the electrode place with opposite charges by applying electrostatic field at porous adsorption electrode two ends, thus reaching to remove the purpose of conductance ion in solution.CDI technology compensate for the defect of traditional desalting techniques, make low energy consumption, high efficiency, environmental protection desalting technology more and more nearer towards industrialization direction.It addition, under identical working condition, the desalting efficiency of membrane capacitance deionization (MCDI) is higher than corresponding CDI device.MCDI namely wherein one piece or two cube electrode sheet surfaces cover last layer ion exchange membrane, make counter ion to pass through, thus effectively suppressing the common-ion effect of electrode surface.Research shows, the desalting efficiency of MCDI improves about 50% (Water.Res., 2008,42,4923-4928) than CDI.
Electrode material serves very important central role in the work process of CDI device, and its property relationship is to the quality of desalination effect.Therefore the core of capacitive deionization technology and it is crucial that choosing to high performance electrode material.Generally, porous carbon material is various informative, stable performance, environmental friendliness, with low cost, simple to operate, and these features meet the requirement of capacitive deionization electrode all very much.And material with carbon element has high-specific surface area and excellent electrical conductance, it may be said that be optimum electrode material.Having developed conventional material with carbon element includes activated carbon, carbon fiber, carbon aerogels, CNT and Graphene etc. at present.
Compared with conventional porous carbon electrode, the high-specific surface area of Graphene, high porosity, high conductivity and the advantage such as good thermal conductivity and mechanical strength, make Graphene obtain good application prospect and wide potentiality in CDI technology.In general, Graphene, in CDI test experiments, generally adopts graphene oxide reducing process to prepare Graphene raw material.The Graphene yield prepared by this method is high, but remaining surface functional group still compares many, it is most important that easily reuniting, the number of plies is more.Zhang et al. is by polystyrene spheres (J.Mater.Chem.A, 2013,1,11778-11789), CNT (J.Mater.Chem., 2012,22,14696-14704), mesoporous carbon (Nanoscale, 2012,4,5440-5446) etc. various carbon materials inserts in Graphene as " sept ", not only inhibit the reunion of Graphene, more the excellent properties of other material with carbon elements is introduced, enable Graphene to give full play to self high-ratio surface and high conductivity, thus obtaining the higher efficiency that desalts.The present invention adopts melamine foams as support, effectively prevents the reunion of graphene film.And one layer of anion exchange membrane is covered on grapheme material surface, make the wettability of electrode be greatly improved.Significantly improve the desalting ability of graphene combination electrode.
Summary of the invention
It is an object of the invention to the shortcoming overcoming prior art with not enough, it is provided that a kind of Graphene melamine foams composite membrane capacitive deionization electrode being applied to the deionized N doping of membrane capacitance and preparation method thereof.
The purpose of the present invention is achieved through the following technical solutions:
A kind of preparation method of Graphene melamine foams composite membrane capacitive deionization electrode, this preparation method is with melamine foams for template adsorption and oxidation graphene aqueous solution, then pass through high-temperature calcination and obtain the three-dimensional porous Graphene melamine foams composite of N doping, again three-dimensional porous Graphene melamine foams composite is coated on electrically conductive graphite paper collector, obtain Graphene melamine foams composite capacitor deionization electrode, the last quaternary ammoniated polyvinyl alcohol polymer being covered with glutaraldehyde cross-linking that is coated with on Graphene melamine foams composite capacitor deionization electrode is as anion exchange membrane, obtain Graphene melamine foams composite membrane capacitive deionization electrode.
Further, following steps are specifically included:
(1) ultrasonic disperse that added water by graphene oxide obtains uniform graphene oxide water solution, then the melamine foams of different-thickness size is put in graphene oxide water solution and adsorb, and after repeatedly extruding, taking out melamine foams to stand, vacuum drying obtains graphene oxide melamine foams composite；Further high temperature cabonization obtains three-dimensional porous Graphene melamine foams composite；Repeatable above adsorption step obtains adsorbing the graphene oxide melamine foams composite of different graphene oxide amount；
(2) three-dimensional porous Graphene melamine foams composite step (1) obtained grinds uniformly with acetylene black, politef, it is coated on electrically conductive graphite paper collector, after finish-drying, obtains Graphene melamine foams composite capacitor deionization electrode；
(3) polyvinyl alcohol, glycidyl tri alkyl ammomium chloride are dissolved in potassium hydroxide aqueous solution, react at 60～70 DEG C, reaction precipitates out quaternized polyvinyl alcohol with dehydrated alcohol after terminating, it is re-dissolved in water and adds glutaraldehyde cross-linking, the crosslinking quaternized polyvinyl alcohol polymer-coated finally obtained is at Graphene melamine foams composite capacitor deionization electrode surface, and thing film finish-drying to be polymerized obtains Graphene melamine foams composite membrane capacitive deionization electrode.
Further, the mass fraction of the graphene oxide water solution described in step (1) is 2%～4%.Concentration is crossed conference and is caused graphene oxide reunion not easily to disperse；The too little number of times needing absorption of concentration becomes many, complex steps.
Further, the extrusion passes described in step (1) is 1～5 time, melamine foams can adsorption and oxidation graphene aqueous solution and dry completely after repeat absorption further, repeating absorption number of times is 1～3 time.
Further, the high temperature cabonization temperature described in step (1) is 400 DEG C～800 DEG C, and heating rate is 1～3 DEG C/min.Too low graphene oxide can not reduce completely, and melamine foams carbonization is incomplete；Temperature is too high can increase unnecessary power consumption.Carburizing atmosphere is blanket of nitrogen or argon atmospher, is conducive to protection melamine foams skeleton.
Further, three-dimensional porous Graphene melamine foams composite described in step (2), acetylene black, politef mass ratio are 80:10:10～90:5:5.
Further, the mass fraction of the potassium hydroxide aqueous solution described in step (3) is 5.6%～22.4%.The too much crystallization of potassium hydroxide, is unfavorable for again quaterisation very little
Further, the mass ratio of the polyvinyl alcohol described in step (3) and glycidyl tri alkyl ammomium chloride is 5:3-1:1, and the mass ratio of glycidyl tri alkyl ammomium chloride and potassium hydroxide is 1:1～4:1.Glycidyl tri alkyl ammomium chloride here provides quaternary ammonium group, and ratio crosses that I haven't seen you for ages causes that polyvinyl alcohol quaternization degree is on the low side, crosses saturated at most, wastes raw material.
Further, the time of step (3) described reaction is 4h.
Further, during step (3) crosslinking, the mass ratio of glutaraldehyde and quaternized polyvinyl alcohol is 10:1～50:1.
A kind of Graphene melamine foams composite membrane capacitive deionization electrode prepared by above-mentioned preparation method.
The present invention has the following advantages relative to prior art and technique effect:
1) present invention adopts melamine foams as support, can effectively stop graphene sheet layer to be reunited, enlarge markedly the specific surface area of Graphene.
2) after high-temperature calcination, Graphene N doping content is high, and electric conductivity and chemical property improve.
3) on Graphene melamine foams combination electrode surface plus polymer anion-exchange membrane, it is to avoid commercial ion exchange membrane expensive and with the shortcoming such as electrode surface loose contact.Effectively inhibit the generation of common-ion effect, and make the wettability of electrode be greatly improved.
4) the Graphene melamine foams composite membrane technology for preparing electrode that prepared by the present invention is simple, and condition is controlled, operates under normal temperature and pressure.Electrode bigger than electric capacity, salt adsorption efficiency is high, stable circulation good, is particularly suitable for industrialized production.
Accompanying drawing explanation
Fig. 1 is the stereoscan photograph of the Graphene melamine foams composite of N doping.
Fig. 2 is the stereoscan photograph that surface is covered with the Graphene melamine foams electrode of anion exchange membrane.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.The change made under other any spirit without departing from the present invention and principle, modification, replacement, combination, simplification, all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Embodiment 1
The preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode, comprises the following steps:
(1) ultrasonic disperse that added water by graphene oxide obtains the aqueous solution that mass fraction is 2%.Put into the melamine foams of 5mm*5mm*3mm, and repeatedly take out standing after extruding 3 times.Dried graphene oxide melamine foams composite is directly warming up to 800 DEG C of carbonizations with 2 DEG C/min under nitrogen atmosphere, obtains Graphene melamine foams composite.
(2) the Graphene melamine foams composite that step (1) obtained, acetylene black, politef grind uniformly according to 80:10:10 mass ratio, are coated on electrically conductive graphite paper collector.Graphene melamine foams composite capacitor deionization electrode is obtained after finish-drying.
(3) 0.25g polyvinyl alcohol, 0.15g glycidyl tri alkyl ammomium chloride are dissolved in the potassium hydroxide aqueous solution that mass fraction is 5.6%, at 60 DEG C, react 4h.Reaction precipitates out quaternized polyvinyl alcohol with dehydrated alcohol after terminating.The glutaraldehyde cross-linking accounting for quaternized polyvinyl alcohol aqueous solution quality 0.4% is added after quaternized polyvinyl alcohol is made into the aqueous solution that mass fraction is 4%, the crosslinking quaternized polyvinyl alcohol polymer-coated obtained is at Graphene melamine foams composite capacitor deionization electrode surface, and thing film finish-drying to be polymerized obtains Graphene melamine foams composite membrane capacitive deionization electrode.
(4) blue electric tester is used to test the ratio electric capacity of above-mentioned Graphene melamine foams composite membrane capacitive deionization electrode.Electrolyte is 1M sodium chloride solution, and electric current density is 1A/g, and voltage range is-1～0V.The ratio electric capacity recording this electrode is 170F/g.Testing its desalting performance in 300 μ s/cm saline, its adsorption capacity is 10.5mg/g.
Embodiment 2
The preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode, comprises the following steps:
(1) ultrasonic disperse that added water by graphene oxide obtains the aqueous solution that mass fraction is 3%.Put into the melamine foams of 5mm*5mm*2mm, and repeatedly take out standing after extruding 3 times.Dried graphene oxide melamine foams composite is directly warming up to 600 DEG C of carbonizations with 1 DEG C/min under nitrogen atmosphere, obtains Graphene melamine foams composite.
(2) the Graphene melamine foams composite that step (1) obtained, acetylene black, politef grind uniformly according to 80:10:10 mass ratio, are coated on electrically conductive graphite paper collector.Graphene melamine foams composite capacitor deionization electrode is obtained after finish-drying.
(3) 0.25g polyvinyl alcohol, 0.2g glycidyl tri alkyl ammomium chloride are dissolved in the potassium hydroxide aqueous solution that mass fraction is 11.2%, at 65 DEG C, react 4h.Reaction precipitates out quaternized polyvinyl alcohol with dehydrated alcohol after terminating.The glutaraldehyde cross-linking accounting for quaternized polyvinyl alcohol aqueous solution quality 0.2% is added after quaternized polyvinyl alcohol is made into the aqueous solution that mass fraction is 4%, the crosslinking quaternized polyvinyl alcohol polymer-coated obtained is at Graphene melamine foams composite capacitor deionization electrode surface, and thing film finish-drying to be polymerized obtains Graphene melamine foams composite membrane capacitive deionization electrode.
(4) blue electric tester is used to test above-mentioned Graphene melamine foams composite membrane capacitive deionization electrode.Electrolyte is 1M sodium chloride solution, and electric current density is 1A/g, and voltage range is-1～0V.The ratio electric capacity recording this electrode is 158F/g.Testing its desalting performance in 300 μ s/cm saline, its adsorption capacity is 8.6mg/g.
Embodiment 3
The preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode, comprises the following steps:
(1) ultrasonic disperse that added water by graphene oxide obtains the aqueous solution that mass fraction is 4%.Put into the melamine foams of 3mm*3mm*2mm, and repeatedly take out standing after extruding 5 times.Dried graphene oxide melamine foams composite is first warming up to 400 DEG C with 2 DEG C/min under nitrogen atmosphere and stops one hour, then is warming up to 800 DEG C of carbonizations, obtains Graphene melamine foams composite (see Fig. 1).
(2) the Graphene melamine foams composite that step (1) obtained, acetylene black, politef grind uniformly according to 90:5:5 mass ratio, are coated on electrically conductive graphite paper collector.Graphene melamine foams composite capacitor deionization electrode (see Fig. 2) is obtained after finish-drying.
(3) 0.25g polyvinyl alcohol, 0.25g glycidyl tri alkyl ammomium chloride are dissolved in the potassium hydroxide aqueous solution that mass fraction is 16.8%, at 65 DEG C, react 4h.Reaction precipitates out quaternized polyvinyl alcohol with dehydrated alcohol after terminating.The glutaraldehyde cross-linking accounting for quaternized polyvinyl alcohol aqueous solution quality 0.1% is added after quaternized polyvinyl alcohol is made into the aqueous solution that mass fraction is 4%, the crosslinking quaternized polyvinyl alcohol polymer-coated obtained is at Graphene melamine foams composite capacitor deionization electrode surface, and thing film finish-drying to be polymerized obtains Graphene melamine foams composite membrane capacitive deionization electrode.
(4) blue electric tester is used to test above-mentioned Graphene melamine foams composite membrane capacitive deionization electrode.Electrolyte is 1M sodium chloride solution, and electric current density is 1A/g, and voltage range is-1～0V.The ratio electric capacity recording this electrode is 184F/g.Testing its desalting performance in 300 μ s/cm saline, its adsorption capacity is 11.3mg/g.
(5) as it is shown in figure 1, after adding Graphene, it is fine that the three-dimensional internet network structure of melamine foams remains on；Additionally the existence of melamine foams also prevents the reunion of graphene sheet layer.As in figure 2 it is shown, quaternized polyvinyl alcohol polymer anion film thickness is about 50 μm, Graphene melamine foams combination electrode thickness is about 100 μm.The high card anionic membrane of trying hard to keep that adheres between the two does not come off in capacitive deionization test process.
Embodiment 4
The preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode, comprises the following steps:
(1) ultrasonic disperse that added water by graphene oxide obtains the aqueous solution that mass fraction is 1%.Put into the melamine foams of 2mm*2mm*1mm, and repeatedly take out standing after extruding 2 times.Dried graphene oxide melamine foams composite is directly warming up to 400 DEG C of carbonizations with 1 DEG C/min under nitrogen atmosphere, obtains Graphene melamine foams composite.
(2) the Graphene melamine foams composite that step (1) obtained, acetylene black, politef grind uniformly according to 90:5:5 mass ratio, are coated on electrically conductive graphite paper collector.Graphene melamine foams composite capacitor deionization electrode is obtained after finish-drying.
(3) 0.25g polyvinyl alcohol, 0.25g glycidyl tri alkyl ammomium chloride are dissolved in the potassium hydroxide aqueous solution that mass fraction is 22.4%, at 70 DEG C, react 4h.Reaction precipitates out quaternized polyvinyl alcohol with dehydrated alcohol after terminating.The glutaraldehyde cross-linking accounting for quaternized polyvinyl alcohol aqueous solution quality 0.08% is added after quaternized polyvinyl alcohol is made into the aqueous solution that mass fraction is 4%, the crosslinking quaternized polyvinyl alcohol polymer-coated obtained is at Graphene melamine foams composite capacitor deionization electrode surface, and thing film finish-drying to be polymerized obtains Graphene melamine foams composite membrane capacitive deionization electrode.
(4) blue electric tester is used to test above-mentioned Graphene melamine foams composite membrane capacitive deionization electrode.Electrolyte is 1M sodium chloride solution, and electric current density is 1A/g, and voltage range is-1～0V.The ratio electric capacity recording this electrode is 124F/g.Testing its desalting performance in 300 μ s/cm saline, its adsorption capacity is 6.8mg/g.
Embodiment 5
The preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode, comprises the following steps:
(1) ultrasonic disperse that added water by graphene oxide obtains the aqueous solution that mass fraction is 2%.Put into the melamine foams of 5mm*5mm*4mm, and repeatedly take out standing after extruding 3 times.Dried graphene oxide melamine foams composite repeats above adsorption step 2 times, and the sample finally obtained directly is warming up to 800 DEG C of carbonizations with 3 DEG C/min under an argon, obtains Graphene melamine foams composite.
(2) the Graphene melamine foams composite that step (1) obtained, acetylene black, politef grind uniformly according to 80:10:10 mass ratio, are coated on electrically conductive graphite paper collector.Graphene melamine foams composite capacitor deionization electrode is obtained after finish-drying.
(3) 0.25g polyvinyl alcohol, 0.15g glycidyl tri alkyl ammomium chloride are dissolved in the potassium hydroxide aqueous solution that mass fraction is 16.8%, at 70 DEG C, react 4h.Reaction precipitates out quaternized polyvinyl alcohol with dehydrated alcohol after terminating.The glutaraldehyde cross-linking accounting for quaternized polyvinyl alcohol aqueous solution quality 0.2% is added after quaternized polyvinyl alcohol is made into the aqueous solution that mass fraction is 4%, the crosslinking quaternized polyvinyl alcohol polymer-coated obtained is at Graphene melamine foams composite capacitor deionization electrode surface, and thing film finish-drying to be polymerized obtains Graphene melamine foams composite membrane capacitive deionization electrode.
(4) blue electric tester is used to test above-mentioned Graphene melamine foams composite membrane capacitive deionization electrode.Electrolyte is 1M sodium chloride solution, and electric current density is 1A/g, and voltage range is-1～0V.The ratio electric capacity recording this electrode is 176F/g.Testing its desalting performance in 300 μ s/cm saline, its adsorption capacity is 11.1mg/g.
Claims (10)
1. the preparation method of a Graphene melamine foams composite membrane capacitive deionization electrode, it is characterized in that, this preparation method is with melamine foams for template adsorption and oxidation graphene aqueous solution, then pass through high-temperature calcination and obtain the three-dimensional porous Graphene melamine foams composite of N doping, again three-dimensional porous Graphene melamine foams composite is coated on electrically conductive graphite paper collector, obtain Graphene melamine foams composite capacitor deionization electrode, the last quaternary ammoniated polyvinyl alcohol polymer being covered with glutaraldehyde cross-linking that is coated with on Graphene melamine foams composite capacitor deionization electrode is as anion exchange membrane, obtain Graphene melamine foams composite membrane capacitive deionization electrode.
2. the preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode according to claim 1, it is characterised in that specifically include following steps:
(1) ultrasonic disperse that added water by graphene oxide obtains uniform graphene oxide water solution, then melamine foams is put in graphene oxide water solution and adsorb, and after repeatedly extruding, take out melamine foams and stand, vacuum drying obtains graphene oxide melamine foams composite；Further high temperature cabonization obtains three-dimensional porous Graphene melamine foams composite；
(2) three-dimensional porous Graphene melamine foams composite step (1) obtained grinds uniformly with acetylene black, politef, is coated on electrically conductive graphite paper collector, obtains Graphene melamine foams composite capacitor deionization electrode after finish-drying；
(3) polyvinyl alcohol, glycidyl tri alkyl ammomium chloride are dissolved in potassium hydroxide aqueous solution, 60 ~ 70oReact under C, reaction precipitates out quaternized polyvinyl alcohol with dehydrated alcohol after terminating, it is re-dissolved in water and adds glutaraldehyde cross-linking, the crosslinking quaternized polyvinyl alcohol polymer-coated finally obtained is at Graphene melamine foams composite capacitor deionization electrode surface, and thing film finish-drying to be polymerized obtains Graphene melamine foams composite membrane capacitive deionization electrode.
3. the preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode according to claim 2, it is characterised in that the mass concentration of the graphene oxide water solution described in step (1) is 2% ~ 4%.
4. the preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode according to claim 2, it is characterised in that the extrusion passes described in step (1) is 1 ~ 5 time；Melamine foams adsorption and oxidation graphene aqueous solution and dry completely after repeat absorption further, repeating absorption number of times is 1 ~ 3 time.
5. the preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode according to claim 2, it is characterised in that the high temperature cabonization temperature described in step (1) is 400oC~800oC, heating rate is 1 ~ 3oC/min, carburizing atmosphere is blanket of nitrogen or argon atmospher.
6. the preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode according to claim 2, it is characterized in that, the three-dimensional porous Graphene melamine foams composite described in step (2), acetylene black, politef mass ratio are 80:10:10 ~ 90:5:5.
7. the preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode according to claim 2, it is characterised in that the mass concentration of the potassium hydroxide aqueous solution described in step (3) is 5.6% ~ 22.4%.
8. the preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode according to claim 2, it is characterized in that, the mass ratio of the polyvinyl alcohol described in step (3) and glycidyl tri alkyl ammomium chloride is 5:3-1:1, and the mass ratio of glycidyl tri alkyl ammomium chloride and potassium hydroxide is 1:1 ~ 4:1；The time of described reaction is 4h.
9. the preparation method of a kind of Graphene melamine foams composite membrane capacitive deionization electrode according to claim 2, it is characterised in that during step (3) crosslinking, glutaraldehyde is 10:1 ~ 50:1 with the mass ratio of quaternized polyvinyl alcohol.
10. a kind of Graphene melamine foams composite membrane capacitive deionization electrode that the preparation method described in any one of claim 1-9 prepares.
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| CN106058196A (en) * | 2016-07-26 | 2016-10-26 | 北京航空航天大学 | Nitrogen-doped three-dimensional nano porous carbon/porous graphene composite material and preparation method thereof |
| CN111484105A (en) * | 2020-05-06 | 2020-08-04 | 上海丁香环境科技有限公司 | Capacitive deionization electrode, preparation method thereof and capacitive deionization device |
| CN111525139A (en) * | 2020-04-09 | 2020-08-11 | 清华大学 | Graphite paper current collector, negative electrode and preparation method |
| CN111732165A (en) * | 2020-06-30 | 2020-10-02 | 东莞理工学院 | Asymmetric CDI desalination module and method for desalination using the same |
| CN115465925A (en) * | 2022-10-20 | 2022-12-13 | 沈阳工业大学 | A kind of polyvinyl alcohol-based gel composite membrane electrode and preparation method thereof |
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