CN108862488A - A kind of preparation method of CDI graphene sponge structure electrode - Google Patents
A kind of preparation method of CDI graphene sponge structure electrode Download PDFInfo
- Publication number
- CN108862488A CN108862488A CN201810694347.9A CN201810694347A CN108862488A CN 108862488 A CN108862488 A CN 108862488A CN 201810694347 A CN201810694347 A CN 201810694347A CN 108862488 A CN108862488 A CN 108862488A
- Authority
- CN
- China
- Prior art keywords
- sponge structure
- cdi
- graphene
- structure electrode
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Abstract
The present invention relates to a kind of CDI preparation methods of graphene sponge structure electrode, carbon nanotube is uniformly mixed to obtain dispersion liquid with graphene oxide solution, dispersion liquid is sprayed at supporting body surface and obtains coating film, reduction swellability is carried out to coating film using luminescence method, obtain three-dimensional sponge structure, by three-dimensional sponge structure, physics is removed from supporter, obtains CDI graphene sponge structure electrode.The beneficial effects of the invention are as follows：Graphene obtained and carbon nanotube complex three-dimensional architecture are restored through luminescence method, effectively utilizes p-p effect, had not only avoided graphene reunion, but also keep 3D carbon electrode intensity；This sponge structure provides good ion transmission channel for electronics, improves ion diffuser efficiency；Graphene sponge structure electrode has highly stable electricity, mechanical property and specific surface area abundant, it is made to show distinctive advantage in CDI technology；Binder is not added, adsorption desorption performance is high, and stability is good, and the service life is permanent.
Description
Technical field
The invention belongs to the preparation fields of capacitive deionization technique film electrode material, are related to a kind of CDI graphene
The preparation method of sponge structure electrode.
Background technique
Capacitive deionization technology (CDI) is a kind of stabilization, energy conservation, efficient desalting technology, under DC Electric Field,
Ion in water flows through the septal pathways between electrode and is collected in the duct being fixed on inside carbon material, forms electric double layer,
This be capacitive energy storage foundation stone and salt ion fix and from salt water selective extraction mechanism.When ion enters
Internal clearance duct and from water be detached from reach adsorption saturation state after, electrode can be made to be regenerated by reversely pressurizeing.This
In cyclic process, the not intervention of novel chemical substance is that a pure physical property embodies, this feature make CDI have compared with
Long service life and lower later maintenance cost.The CDI electrode of the prior art is mostly based on active carbon, in binder
Under the action of coated or roll-forming, the electrode conductivuty that this kind of mode obtains is poor, complex process, and is main ratio with micropore
The ionic mobility in the solution of the active carbon of surface area is low, and adsorption desorption performance is poor.
Summary of the invention
The technical problem to be solved by the present invention is to：Based on the above issues, the present invention provides a kind of CDI graphene sponge knot
The preparation method of structure electrode.
The present invention solves a technical solution used by its technical problem：A kind of CDI graphene sponge structure electricity
Carbon nanotube is uniformly mixed to obtain dispersion liquid with graphene oxide solution by the preparation method of pole, and dispersion liquid is sprayed at support
Body surface face obtains coating film, carries out reduction swellability to coating film using luminescence method, three-dimensional sponge structure is obtained, by three-dimensional sponge knot
Structure physics from supporter is removed, and CDI graphene sponge structure electrode is obtained.
Further, graphene oxide solution is that graphene oxide is made through hummers oxidation-reduction method by graphite powder to coagulate
It is diluted with water to obtain after glue, the concentration of graphene oxide solution is 2~100mg/ml.
Further, graphene oxide solute and the mass ratio of carbon nanotube are 100 in dispersion liquid：1~5：1.
Further, dispersion liquid is put into cell pulverization instrument and disperses, and jitter time is 20~120min.
Further, supporter is the commercial sand paper of 100~3000 mesh.
Further, spraying number is 2~8 times, and coating film is with a thickness of 10~500 μm.
Further, luminescence method is near infrared spectrum irradiation, and light application time is 0.5~18h, and the power of near infrared light is 50
~500W.
Further, the sheet resistance of CDI graphene sponge structure electrode is 1~80 Ω/.
The beneficial effects of the invention are as follows：Graphene and carbon nanotube complex three-dimensional system knot obtained are restored through luminescence method
Structure effectively utilizes p-p effect, has not only avoided graphene reunion, but also keep 3D carbon electrode intensity；This sponge structure is simultaneously
Electronics provides good ion transmission channel, improves ion diffuser efficiency；Secondly, graphene sponge structure electrode has height
Stable electricity, mechanical property and specific surface area abundant, makes it show distinctive advantage in CDI technology；Finally, with
Graphene oxide solution and carbon nanotube are the electrode diaphragm that raw material sprays out, and do not add binder, and graphene oxide passes through light
Graphene is obtained according to reduction method, has ensured the good electric conductivity of electrode and suitable microcosmic cellular structure, adsorption desorption performance is high,
Stability is good, and the service life is permanent.
Detailed description of the invention
The following further describes the present invention with reference to the drawings.
Fig. 1 is the CDI adsorption desorption performance map of electrode diaphragm in embodiment 3.
Specific embodiment
Presently in connection with specific embodiment, the invention will be further described, following embodiment be intended to illustrate invention rather than
Limitation of the invention further.
Embodiment 1
Commercialized graphite powder is taken, it is stand-by to prepare graphene oxide gel with hummers method, is diluted with water 30mg/
Ml graphene oxide solution.Taking mass ratio is 20：1 graphene oxide solute and the mixing of carbon nanotube, put it into cell
It after dispersing 40min in crusher, is fitted into high pressure painting tank, is sprayed repeatedly on the sand paper of 200 mesh 3 times, spray film thickness control
80 μm are made as, then coating film is placed in using under 200W near infrared light, 4h is irradiated, physics removing is carried out to it, obtains graphite
Alkene sponge structure electrode film sheet resistance is 40 Ω/.
Embodiment 2
Commercialized graphite powder is taken, it is stand-by to prepare graphene oxide gel with hummers method, is diluted with water 50mg/
Ml graphene oxide solution.Taking mass ratio is 10：1 graphene oxide solute and the mixing of carbon nanotube, put it into cell
It after dispersing 60min in crusher, is fitted into high pressure painting tank, is sprayed repeatedly on the sand paper of 500 mesh 4 times, spray film thickness control
100 μm are made as, then coating film is placed in using under 200W near infrared light, 3h is irradiated, physics removing is carried out to it, obtains stone
Black alkene sponge structure electrode film sheet resistance is 20 Ω/.
Embodiment 3
Commercialized graphite powder is taken, it is stand-by to prepare graphene oxide gel with hummers method, is diluted with water 15mg/
Ml graphene oxide solution.Taking mass ratio is 25：1 graphene oxide solute and the mixing of carbon nanotube, put it into cell
After dispersing 50min in crusher, it is fitted into high pressure spray tank, is sprayed repeatedly on the sand paper of 1000 mesh 6 times, coating film thickness control
It is 200 μm, then coating film is placed in using under 300W near infrared light, 2h is irradiated, physics removing is carried out to it, obtains graphite
Alkene sponge structure electrode film sheet resistance is 10 Ω/.
Electrode diaphragm obtained in embodiment 3 is fitted into Small-sized C DI module (electrode size 8*8cm), voltage is applied
1.6V, processing water sample are tap water, and conductivity is 455.1 μ s/cm, and volume 250ml is taken to carry out electrode CDI adsorption desorption cyclicity
It can detect, it is as a result as follows：As shown in Figure 1, the adsorption process of 135min, conductivity drops to 145.8 μ by 455.1 initial μ s/cm
S/cm, removal efficiency 67.96%, reversed pressurization desorption 60min basically reach desorption equilibrium.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (8)
1. a kind of CDI preparation method of graphene sponge structure electrode, it is characterized in that：Carbon nanotube is molten with graphene oxide
Liquid be uniformly mixed obtains dispersion liquid, dispersion liquid is sprayed at supporting body surface and obtains coating film, using luminescence method to coating film into
Row reduction swellability obtains three-dimensional sponge structure, and by three-dimensional sponge structure, physics is removed from supporter, obtains CDI graphene
Sponge structure electrode.
2. a kind of preparation method of CDI graphene sponge structure electrode according to claim 1, it is characterized in that：It is described
Graphene oxide solution concentration be 2~100mg/ml.
3. a kind of preparation method of CDI graphene sponge structure electrode according to claim 1, it is characterized in that：It is described
Dispersion liquid in graphene oxide solute and the mass ratio of carbon nanotube be 100：1~5：1.
4. a kind of preparation method of CDI graphene sponge structure electrode according to claim 1, it is characterized in that：It is described
Dispersion liquid be put into cell pulverization instrument and disperse, jitter time is 20~120min.
5. a kind of preparation method of CDI graphene sponge structure electrode according to claim 1, it is characterized in that：It is described
Supporter be 100~3000 mesh commercial sand paper.
6. a kind of preparation method of CDI graphene sponge structure electrode according to claim 1, it is characterized in that：It is described
Spraying number be 2~8 times, coating film is with a thickness of 10~500 μm.
7. a kind of preparation method of CDI graphene sponge structure electrode according to claim 1, it is characterized in that：It is described
Luminescence method be near infrared spectrum irradiation, light application time is 0.5~18h, and the power of near infrared light is 50~500W.
8. a kind of preparation method of CDI graphene sponge structure electrode according to claim 1, it is characterized in that：It is described
CDI graphene sponge structure electrode sheet resistance be 1~80 Ω/.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810694347.9A CN108862488B (en) | 2018-06-29 | 2018-06-29 | Preparation method of graphene sponge structure electrode for CDI |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810694347.9A CN108862488B (en) | 2018-06-29 | 2018-06-29 | Preparation method of graphene sponge structure electrode for CDI |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108862488A true CN108862488A (en) | 2018-11-23 |
| CN108862488B CN108862488B (en) | 2021-09-07 |
Family
ID=64297051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810694347.9A Active CN108862488B (en) | 2018-06-29 | 2018-06-29 | Preparation method of graphene sponge structure electrode for CDI |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108862488B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103077766A (en) * | 2013-02-06 | 2013-05-01 | 青岛中科昊泰新材料科技有限公司 | Graphene conducting film and application of graphene conducting film to electrochemical capacitor |
| CN104183832A (en) * | 2014-08-13 | 2014-12-03 | 东南大学 | Preparation method and application of FeF3 flexible electrode based on carbon nano tube-graphene composite three-dimensional network |
| CN107565140A (en) * | 2017-10-31 | 2018-01-09 | 武汉理工大学 | Preparation method for the three-dimensional porous graphene carbon nanotube electrode of enzymatic |
-
2018
- 2018-06-29 CN CN201810694347.9A patent/CN108862488B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103077766A (en) * | 2013-02-06 | 2013-05-01 | 青岛中科昊泰新材料科技有限公司 | Graphene conducting film and application of graphene conducting film to electrochemical capacitor |
| CN104183832A (en) * | 2014-08-13 | 2014-12-03 | 东南大学 | Preparation method and application of FeF3 flexible electrode based on carbon nano tube-graphene composite three-dimensional network |
| CN107565140A (en) * | 2017-10-31 | 2018-01-09 | 武汉理工大学 | Preparation method for the three-dimensional porous graphene carbon nanotube electrode of enzymatic |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108862488B (en) | 2021-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Studying the electrosorption performance of activated carbon electrodes in batch-mode and single-pass capacitive deionization | |
| Zhao et al. | Performance comparison and energy consumption analysis of capacitive deionization and membrane capacitive deionization processes | |
| Chang et al. | Porous carbon derived from Metal–organic framework (MOF) for capacitive deionization electrode | |
| Li et al. | Resin-enhanced rolling activated carbon electrode for efficient capacitive deionization | |
| Guo et al. | Hierarchical porous carbon derived from sulfonated pitch for electrical double layer capacitors | |
| Krüner et al. | Hydrogen-treated, sub-micrometer carbon beads for fast capacitive deionization with high performance stability | |
| Wang et al. | Continuous desalination with a metal-free redox-mediator | |
| Hussain et al. | Fabrication of electrospun trace NiO-doped hierarchical porous carbon nanofiber electrode for capacitive deionization | |
| Hou et al. | Functionalized carbon materials for efficient solar steam and electricity generation | |
| CN103399064B (en) | A kind of graphene oxide/brucite/Nafion laminated film modified electrode and preparation method thereof | |
| CN104269744B (en) | A kind of high concentration little granule anion generator system | |
| CN103272559A (en) | Application of porous carbon electrode material in electrosorb technology | |
| CN103979650B (en) | A kind of self-assembling technique prepares the method for electro-adsorption assembly | |
| Wang et al. | The optimized flow-electrode capacitive deionization (FCDI) performance by ZIF-8 derived nanoporous carbon polyhedron | |
| CN109607711A (en) | A kind of hydridization capacitive deionization desalination module and desalination process | |
| Phuoc et al. | ZIF-67 metal-organic frameworks and CNTs-derived nanoporous carbon structures as novel electrodes for flow-electrode capacitive deionization | |
| CN104674382A (en) | Preparation method of porous carbon nanofiber for capacitive deionization | |
| Li et al. | Electrosorptive removal of salt ions from water by membrane capacitive deionization (MCDI): characterization, adsorption equilibrium, and kinetics | |
| Xue et al. | Exceptional capacitive deionization desalination performance of hollow bowl-like carbon derived from MOFs in brackish water | |
| CN105692585B (en) | The carbon nanomaterial and its preparation method of a kind of graphene-containing structure and application | |
| Lee et al. | Effect of surface modification of carbon felts on capacitive deionization for desalination | |
| CN105152280B (en) | A kind of preparation method of the membrane capacitance type desalination electrode based on three-dimensional grapheme | |
| CN103950917A (en) | Method for preparing porous carbon material | |
| CN108862488A (en) | A kind of preparation method of CDI graphene sponge structure electrode | |
| CN113213598A (en) | Ti-MXene derived sodium titanium phosphate/graphene composite material and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |