CN116216702A - A coaxial DBD device of dysmorphism structure three-electrode for reducing graphene oxide - Google Patents
A coaxial DBD device of dysmorphism structure three-electrode for reducing graphene oxide Download PDFInfo
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- CN116216702A CN116216702A CN202310223222.9A CN202310223222A CN116216702A CN 116216702 A CN116216702 A CN 116216702A CN 202310223222 A CN202310223222 A CN 202310223222A CN 116216702 A CN116216702 A CN 116216702A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 35
- 206010066054 Dysmorphism Diseases 0.000 title claims description 3
- 239000011521 glass Substances 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims description 13
- 239000000523 sample Substances 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000011888 foil Substances 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 7
- 230000009467 reduction Effects 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 23
- 239000000843 powder Substances 0.000 description 22
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 20
- 229910052786 argon Inorganic materials 0.000 description 10
- 230000004888 barrier function Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005281 excited state Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000009832 plasma treatment Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/184—Preparation
Abstract
The invention discloses a three-electrode coaxial DBD device with a special-shaped structure for reducing graphene oxide, which is applied to the technical field of graphene preparation, and has the technical scheme that: the high-voltage power supply comprises a medium pipe, a nanosecond pulse power supply and a high-frequency alternating current power supply, wherein a first ground electrode is arranged in the medium pipe, a first high-voltage electrode, a second high-voltage electrode, a third high-voltage electrode, a fourth high-voltage electrode and a fifth high-voltage electrode are sequentially connected to the outer side of the medium pipe, the first high-voltage electrode, the third high-voltage electrode and the fifth high-voltage electrode are all connected with the nanosecond pulse power supply through wires, the second high-voltage electrode and the fourth high-voltage electrode are all electrically connected with the high-frequency alternating current power supply, and a special-shaped glass pipe is wrapped outside the medium pipe; the method has the technical effects that: the graphene oxide is treated by utilizing the atmospheric low-temperature plasma, so that the efficient reduction of the graphene oxide is realized, and the purity of the graphene is effectively improved.
Description
Technical Field
The invention relates to the technical field of graphene preparation, in particular to a three-electrode coaxial DBD device with a special-shaped structure for reducing graphene oxide.
Background
The atmospheric pressure low-temperature plasma is non-equilibrium plasma generated under the open atmospheric pressure condition by utilizing the gas discharge technology, and because the electron temperature in the system is far higher than the temperature of heavy particles, the gas temperature close to room temperature can be maintained while higher chemical activity is obtained, and the chemical reaction which is difficult to be generated under the conventional condition can be realized under normal temperature and normal pressure due to the characteristics of high energy electrons in the plasma, high energy and strong activity of active particles such as various excited state species and the like. The plasma is applied and researched in various fields such as chemical synthesis, film preparation, material surface treatment, material modification, ozone generation, nano material preparation and the like. As a very promising material treatment means, active particles such as high-energy electrons and various excited state species in low-temperature plasma can fully react with GO, and the active particles break chemical bonds (such as C-O, C =O) in GO, so that the effect of removing oxygen-containing functional groups is achieved.
Common reduction GO reactors are plasma jet, dielectric barrier discharge, etc. The plasma jet is in an open area, and when powder is treated, uncontrollable scattering of the powder can occur due to the influence of air flow, so that the powder is not suitable for treating GO powder. The dielectric barrier discharge can generate large-area low-temperature plasma, the operation is simple, and the powder treatment process is more controllable than jet flow. However, the conventional flat DBD has the problems of few discharge channels and uneven treatment effect. Compared with a flat-plate DBD, the coaxial DBD is easier to generate uniform discharge and has better treatment effect. However, the conventional coaxial DBD has the problems of few discharge channels, high initial voltage, and uneven treatment caused by powder flowing along with the airflow. One expects to achieve a better and more uniform discharge effect by changing the electrode structure, power supply parameters, etc. condition parameters. It was found experimentally that by adding a third electrode, the discharge effect of the plasma can be enhanced.
As patent CN103563984a proposes a method for preparing graphene composite material by using plasma jet, a stable plasma jet is generated by using a plasma jet device, the bottom of the device is full of glow, and the treated GO composite material is reduced for 20-30 minutes by passing through a plasma region, so that the effect of reducing the GO composite material is realized.
A method for preparing graphene by dielectric barrier discharge plasma is proposed as patent CN 107686108A. And a plasma discharge area is generated between the two ends of the flat DBD, and GO is placed in the plasma area between the two electrodes for reduction, so that the effect of reducing the GO composite material is realized.
As patent CN115055140a proposes a circulating integrated coaxial DBD powder coating device, a coaxial DBD is used to fuse with a cyclone separator, so that the ordered flow and separation of gas and solid phases are ensured, powder separation can be realized, and the electrode structure adopts electrode arrangement with high inside and high outside, so that the plasma and the powder are fully contacted.
As patent CN208675593U proposes a three-electrode pulse creeping-surface streamer discharge plasma ice-breaking device, in which a third electrode is added, and the third electrode is introduced to enhance creeping discharge between a high-voltage power supply and the ground electrode, so that the ordinary creeping discharge has better discharging effect, and the removal of ice on the surface of an insulating material is realized.
The above patent has the following problems: the method of plasma jet proposed in CN103563984a is not suitable for treating GO powder, and the powder moves to a non-plasma region along with the gas flow and also plugs the gas outlet of the device.
The method for preparing graphene by dielectric barrier discharge plasma is proposed in patent CN 107686108A. The existing powder is uncontrollable, the treatment effect is not uniform, the discharge starting voltage is high, and uniform discharge is difficult to realize.
The circulation-integrated coaxial DBD powder coating device proposed in patent CN115055140a can only process smaller and lighter powders, and larger or heavier powders cannot achieve fluidization effect. The device is a traditional coaxial DBD, has few discharge channels and high initial voltage, and achieves high uniform discharge voltage.
The device of the three-electrode pulse creeping light discharge plasma structure proposed in the patent CN208675593U, the introduction of the third electrode enhances the creeping discharge of the surface, and the creeping discharge structure cannot enhance the discharge area, and is not suitable for powder treatment.
Disclosure of Invention
The invention aims to provide a three-electrode coaxial DBD device with a special-shaped structure for reducing graphene oxide, which has the advantages that: the graphene oxide is treated by utilizing the atmospheric low-temperature plasma, so that the efficient reduction of the graphene oxide is realized, and the purity of the graphene is effectively improved.
The technical aim of the invention is realized by the following technical scheme: the utility model provides a coaxial DBD device of special-shaped structure for reducing graphene oxide, includes dielectric tube, nanosecond pulse power supply and high frequency alternating current power supply, be provided with first ground electrode in the dielectric tube, first high-voltage electrode, second high-voltage electrode, third high-voltage electrode, fourth high-voltage electrode and fifth high-voltage electrode have been connected gradually on the outside of dielectric tube, first high-voltage electrode, third high-voltage electrode and fifth high-voltage electrode all are connected through the wire with nanosecond pulse power supply, electric connection between second high-voltage electrode and fourth high-voltage electrode all and the high frequency alternating current power supply, the dielectric tube is wrapped up in the special-shaped glass tube outward, be provided with the second ground electrode outward, gas inlet and gas outlet have been seted up respectively on the special-shaped glass tube, the gas outlet has the high-voltage gas cylinder through the intake pipe intercommunication, be equipped with the argon gas in the high-voltage cylinder, special-shaped glass tube is sealed with first sealed fixed plug and first sealed fixed plug along the opening part of length direction both sides respectively.
According to the technical scheme, graphene oxide powder is firstly placed in a special-shaped glass tube, then the medium tube is placed in the special-shaped glass tube, the special-shaped glass tube is sealed through a first sealing fixing plug and a second sealing fixing plug, then an air inlet pipe is communicated with an air inlet, argon is introduced into the special-shaped glass tube, at the moment, a nanosecond pulse power supply and a high-frequency alternating current power supply are respectively connected, plasma is generated under the combined action of high-voltage electricity and the argon in a discharging mode, and the graphene powder is prepared after waiting for 1-3 min.
The invention is further provided with: the first electrode is made of stainless steel, and is 160mm long and 13mm in radius.
The invention is further provided with: the first high-voltage electrode, the second high-voltage electrode, the third high-voltage electrode, the fourth high-voltage electrode and the fifth high-voltage electrode are made of copper mesh or aluminum foil, and the width is 10mm.
The invention is further provided with: the spacing between the first high-voltage electrode, the second high-voltage electrode, the third high-voltage electrode, the fourth high-voltage electrode and the fifth high-voltage electrode is 20mm, and the arrangement rule of multiple electrodes is adopted.
The invention is further provided with: the second ground electrode is made of copper mesh and wrapped on the special-shaped glass tube, and the length of the second ground electrode is 150mm.
The invention is further provided with: the medium pipe is made of quartz material, and has a length of 350mm, an outer diameter of 15mm, an inner diameter of 13mm and a thickness of 1mm.
The invention is further provided with: the special-shaped glass tube is made of quartz glass, has a length of 260mm, an outer diameter of 25mm in the middle part, an inner diameter of 22mm and a thickness of 1.5mm.
The invention is further provided with: the nanosecond pulse power supply is electrically connected with a high-voltage probe and a current coil, the high-frequency alternating current power supply is electrically connected with the high-voltage probe and the current coil, and the two groups of the high-voltage probes and the current coils are electrically connected with an oscilloscope together.
The invention is further provided with: and a flowmeter and a one-way valve for controlling the gas flow rate are fixedly connected to the gas inlet pipe between the high-pressure gas cylinder and the gas inlet respectively.
To sum up:
1. firstly, placing graphene oxide powder in a special-shaped glass tube, then placing a medium tube in the special-shaped glass tube, sealing the special-shaped glass tube by a first sealing fixed plug and a second sealing fixed plug, then communicating an air inlet pipe with an air inlet, and introducing argon into the special-shaped glass tube, at the moment, respectively switching on a nanosecond pulse power supply and a high-frequency alternating current power supply, under the combined action of high-voltage electricity and argon, further discharging to generate plasma, and waiting for 1-3min to obtain the graphene powder;
2. the graphene oxide is treated by utilizing the atmospheric low-temperature plasma, so that the high-efficiency reduction of the graphene oxide is realized, and the purity of the graphene is effectively improved;
3. aiming at the problem that the movement range of the powder is uncontrollable, the reactor is designed into a special-shaped glass structure, so that graphene oxide powder can be fully contacted with a plasma discharge area, full reaction is realized, and the uniformity of the product treatment effect is improved;
4. the device electrode adopts a three-electrode structure of surface reinforcement dielectric barrier discharge, adopts alternating current and pulse dual-source drive, reduces discharge starting voltage, increases a discharge channel, is easier to realize uniform discharge effect, and obviously improves reduction efficiency and product purity of graphene oxide.
Drawings
FIG. 1 is a schematic view of the overall structure of the present embodiment;
FIG. 2 is a schematic diagram of the structure of a medium pipe according to the present embodiment;
FIG. 3 is a schematic view showing the structure of a shaped glass tube according to the present embodiment;
FIG. 4 is a schematic diagram showing the connection between a medium pipe and a special-shaped glass pipe according to the embodiment;
fig. 5 is a flowchart of the plasma treatment of graphene oxide in the present embodiment.
Reference numerals: 1. a nanosecond pulse power supply; 2. a high frequency ac power supply; 3. an oscilloscope; 4. a high pressure probe; 5. a current coil; 6. a medium pipe; 7. a first sealing fixed plug; 8. an air outlet; 9. a first ground electrode; 10. a first high voltage electrode; 11. a second high voltage electrode; 12. a third high voltage electrode; 13. a fourth high voltage electrode; 14. a fifth high voltage electrode; 15. a second ground electrode; 16. a shaped glass tube; 17. an air inlet; 18. a second sealing fixed plug; 19. a one-way valve; 20. a flow meter; 21. a high pressure gas cylinder.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Examples: referring to fig. 1-5, a three-electrode coaxial DBD device with a special-shaped structure for reducing graphene oxide comprises a medium tube 6, a nanosecond pulse power supply 1 and a high-frequency alternating current power supply 2, wherein a first ground electrode 9 is arranged in the medium tube 6, a first high-voltage electrode 10, a second high-voltage electrode 11, a third high-voltage electrode 12, a fourth high-voltage electrode 13 and a fifth high-voltage electrode 14 are sequentially connected to the outer side of the medium tube 6, the first high-voltage electrode 10, the third high-voltage electrode 12 and the fifth high-voltage electrode 14 are all connected with the nanosecond pulse power supply 1 through wires, the second high-voltage electrode 11 and the fourth high-voltage electrode 13 are all electrically connected with the high-frequency alternating current power supply 2, a special-shaped glass tube 16 is wrapped outside the medium tube 6, a second ground electrode 15 is arranged outside the special-shaped glass tube 16, an air inlet 17 and an air outlet 8 are respectively formed in the special-shaped glass tube 16, the air outlet 8 is communicated with a high-voltage air bottle 21 through an air inlet pipe, argon gas is filled in the high-voltage air bottle 21, and openings on two sides of the special-shaped glass tube 16 along the length direction are respectively connected with a first sealing fixing plug 7 and a first sealing fixing plug 7 in a sealing mode;
specifically, graphene oxide powder is placed in a special-shaped glass tube 16, a medium tube 6 is placed in the special-shaped glass tube 16, the special-shaped glass tube 16 is sealed through a first sealing fixing plug 7 and a second sealing fixing plug 18, an air inlet pipe is communicated with an air inlet, argon is introduced into the special-shaped glass tube 16, at the moment, a nanosecond pulse power supply 1 and a high-frequency alternating current power supply 2 are respectively connected, plasma is generated through discharging under the combined action of high-voltage electricity and the argon, and the graphene powder is prepared after waiting for 1-3 min.
Further, the first ground electrode 9 is made of stainless steel, the length is 160mm, the radius is 13mm, the second ground electrode 15 is made of copper mesh and is wrapped on the special-shaped glass tube 16, the length is 150mm, and the high-voltage discharge effect in the special-shaped glass tube 16 is improved.
Further, the first high-voltage electrode 10, the second high-voltage electrode 11, the third high-voltage electrode 12, the fourth high-voltage electrode 13 and the fifth high-voltage electrode 14 are made of copper mesh or aluminum foil, the width is 10mm, the distance between the first high-voltage electrode 10, the second high-voltage electrode 11, the third high-voltage electrode 12, the fourth high-voltage electrode 13 and the fifth high-voltage electrode 14 is 20mm, the multi-electrode arrangement rule is adopted, the nanosecond pulse power supply 1 and the alternating current power supply are alternately arranged between the middle electrodes, the discharge active particles are enhanced, more discharge channels are generated, and the powder treatment efficiency is improved.
Further, the medium tube 6 is made of quartz material, and has a length of 350mm, an outer diameter of 15mm, an inner diameter of 13mm, a thickness of 1mm, and a quartz glass of the shaped glass tube 16, a length of 260mm, an outer diameter of 25mm in the middle portion, an inner diameter of 22mm, and a thickness of 1.5mm, and the shaped glass tube 16 prevents powder from being blown out of the plasma treatment region by gas.
Further, the nanosecond pulse power supply 1 is electrically connected with the high-voltage probe 4 and the current coil 5, the high-frequency alternating current power supply 2 is electrically connected with the high-voltage probe 4 and the current coil 5, the two groups of the high-voltage probes 4 and the current coil 5 are electrically connected with the oscilloscope 3 together, the high-voltage probe 4 has a certain isolation function, high-voltage signals can be directly measured, and the current coil 5 mainly has two functions, namely choking, tuning and frequency selecting.
Further, a flowmeter 20 and a one-way valve 19 for controlling the flow rate of the gas are fixedly connected to the gas inlet pipe between the high-pressure gas cylinder 21 and the gas inlet 17, the flow rate of the argon gas is monitored through the flowmeter 20, and the one-way valve 19 realizes unidirectional flow and flow rate control of the argon gas.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.
Claims (9)
1. A coaxial DBD device of dysmorphism structure three-electrode for reducing graphene oxide, its characterized in that: including medium pipe (6), nanosecond pulse power supply (1) and high frequency alternating current power supply (2), be provided with first earth electrode (9) in medium pipe (6), first high-voltage electrode (10), second high-voltage electrode (11), third high-voltage electrode (12), fourth high-voltage electrode (13) and fifth high-voltage electrode (14) have been connected gradually on the outside of medium pipe (6), first high-voltage electrode (10), third high-voltage electrode (12) and fifth high-voltage electrode (14) all are connected with nanosecond pulse power supply (1) through the wire, electric connection between equal and the high frequency alternating current power supply (2) of second high-voltage electrode (11) and fourth high-voltage electrode (13), medium pipe (6) are wrapped up in and are had special-shaped glass pipe (16), be provided with second earth electrode (15) outside special-shaped glass pipe (16), gas cylinder (17) and gas outlet (8) have been seted up respectively on special-shaped glass pipe (16), gas outlet (8) have high-voltage cylinder (21) through the intercommunication, high-voltage cylinder (21) and first sealed plug (7) are fixed in the both sides of sealing plug (7) are connected respectively to the sealed both sides.
2. The profiled structured three-electrode coaxial DBD device for reducing graphene oxide according to claim 1, characterized in that: the first ground electrode (9) is made of stainless steel, and is 160mm long and 13mm in radius.
3. The profiled structured three-electrode coaxial DBD device for reducing graphene oxide according to claim 1, characterized in that: the first high-voltage electrode (10), the second high-voltage electrode (11), the third high-voltage electrode (12), the fourth high-voltage electrode (13) and the fifth high-voltage electrode (14) are made of copper mesh or aluminum foil, and the width is 10mm.
4. A profiled structured three-electrode coaxial DBD device for reducing graphene oxide according to claim 3, characterized in that: the first high-voltage electrode (10), the second high-voltage electrode (11), the third high-voltage electrode (12), the fourth high-voltage electrode (13) and the fifth high-voltage electrode (14) are arranged at intervals of 20mm, and a multi-electrode arrangement rule is adopted.
5. The profiled structured three-electrode coaxial DBD device for reducing graphene oxide according to claim 1, characterized in that: the second ground electrode (15) is made of a copper net and is wrapped on the special-shaped glass tube (16), and the length of the second ground electrode is 150mm.
6. The profiled structured three-electrode coaxial DBD device for reducing graphene oxide according to claim 1, characterized in that: the medium pipe (6) is made of quartz material, and has the length of 350mm, the outer diameter of 15mm, the inner diameter of 13mm and the thickness of 1mm.
7. The profiled structured three-electrode coaxial DBD device for reducing graphene oxide according to claim 1, characterized in that: the special-shaped glass tube (16) is made of quartz glass, has a length of 260mm, an outer diameter of 25mm in the middle part, an inner diameter of 22mm and a thickness of 1.5mm.
8. The profiled structured three-electrode coaxial DBD device for reducing graphene oxide according to claim 1, characterized in that: the nanosecond pulse power supply (1) is electrically connected with a high-voltage probe (4) and a current coil (5), the high-frequency alternating current power supply (2) is electrically connected with the high-voltage probe (4) and the current coil (5), and two groups of the high-voltage probes (4) and the current coils (5) are electrically connected with an oscilloscope (3) together.
9. The profiled structured three-electrode coaxial DBD device for reducing graphene oxide according to claim 1, characterized in that: a flowmeter (20) and a one-way valve (19) for controlling the gas flow rate are fixedly connected to the gas inlet pipe between the high-pressure gas cylinder (21) and the gas inlet (17) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310223222.9A CN116216702A (en) | 2023-03-09 | 2023-03-09 | A coaxial DBD device of dysmorphism structure three-electrode for reducing graphene oxide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310223222.9A CN116216702A (en) | 2023-03-09 | 2023-03-09 | A coaxial DBD device of dysmorphism structure three-electrode for reducing graphene oxide |
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| CN116216702A true CN116216702A (en) | 2023-06-06 |
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| CN202310223222.9A Pending CN116216702A (en) | 2023-03-09 | 2023-03-09 | A coaxial DBD device of dysmorphism structure three-electrode for reducing graphene oxide |
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