CN114525522A - Graphene oxide waste conversion and recovery device and method - Google Patents
Graphene oxide waste conversion and recovery device and method Download PDFInfo
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- CN114525522A CN114525522A CN202210073245.1A CN202210073245A CN114525522A CN 114525522 A CN114525522 A CN 114525522A CN 202210073245 A CN202210073245 A CN 202210073245A CN 114525522 A CN114525522 A CN 114525522A
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- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
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Abstract
The invention discloses a graphene oxide waste material conversion and recovery device and a method thereof. Graphene oxide waste material conversion recovery unit includes anode reaction subassembly and cathode reaction subassembly, and the anode reaction subassembly includes anode reaction room and first electrode, and first electrode installation is in the anode reaction room, and first electrode is used for connecting the power positive pole, and the cathode reaction subassembly includes cathode reaction room and second electrode, and the second electrode installation is in the cathode reaction room, and the second electrode is used for connecting the power negative pole. According to the graphene oxide waste material conversion and recovery device, the graphene waste material is recovered by an electrochemical method, and on one hand, the dispersed high-viscosity graphene oxide is efficiently converted and recovered into self-agglomerated and easily separated graphene; on the other hand, the method does not need any other chemical medicine, does not generate harmful substances to the environment, realizes green and pollution-free performance, and solves the problems of high cost, environmental unfriendliness, secondary pollution, difficult recovery, complex post-treatment and the like of the chemical treatment method in the traditional technology.
Description
Technical Field
The invention relates to the field of graphene waste treatment, in particular to a graphene oxide waste conversion and recovery device and a method thereof.
Background
With the wider application of graphene oxide, a large amount of graphene oxide waste (including sewage) is inevitably generated in the large-scale production process of graphene oxide. Due to the problems of unstable property, difficult determination of solid content, high slurry viscosity, poor consistency, large water consumption for cleaning and the like of the graphene oxide waste, the graphene oxide waste treatment mode has higher cost and certain pollution in treatment. At present, a general treatment method of graphene oxide waste comprises the following steps: the method for flocculating the flocculant and reducing the reducing agent has the problems of high cost, environmental unfriendliness, secondary pollution, difficult recovery, complex post-treatment and the like.
Disclosure of Invention
Based on this, it is necessary to provide a graphene oxide waste conversion and recovery apparatus and a method thereof. The graphene oxide waste conversion and recovery device is used for treating graphene oxide waste (including sewage), and has the advantages of being green, expandable, efficient and low in cost.
A graphene oxide waste material conversion recovery device comprises:
the anode reaction assembly comprises an anode reaction chamber and a first electrode, the first electrode is arranged in the anode reaction chamber, and the first electrode is used for being connected with the positive pole of a power supply; and
the cathode reaction assembly comprises a cathode reaction chamber and a second electrode, the second electrode is arranged in the cathode reaction chamber, and the second electrode is used for being connected with a power supply cathode.
In some embodiments, the cathode reaction assembly further comprises a driving mechanism connected to the second electrode for driving the second electrode to rotate.
In some embodiments, the driving mechanism includes a driving motor and a brush, the brush is mounted to the cathode reaction chamber, the brush is in sliding fit with the second electrode and is used for connecting a power supply cathode, and the driving motor is connected with the second electrode and is used for driving the second electrode to rotate.
In some embodiments, the driving mechanism drives the second electrode to rotate at a speed of 0-50 rpm.
In some of these embodiments, the first electrode comprises a first electrode frame on which at least one of the first microelectrodes is disposed, and a first microelectrode.
In some of these embodiments, the second electrode comprises a second electrode frame on which at least one of the second microelectrodes is disposed, and a second microelectrode.
In some embodiments, the current flowing between the first electrode and the second electrode is low-voltage direct current, and the voltage is 0.5-3V.
In some embodiments, the anode reaction chamber is in communication with the cathode reaction chamber, and a separator is disposed where the anode reaction chamber is in communication with the cathode reaction chamber, and the separator is used for separating graphene.
In some embodiments, the isolating member is a filter screen, and the mesh number of the isolating member is 800-1200 meshes.
In some of the embodiments, the bottom of the cathode reaction chamber is provided with a drain hole, and the drain hole is provided with a drain valve.
The invention also aims to provide a graphene oxide waste conversion and recovery method.
A graphene oxide waste material conversion and recovery method using the graphene oxide waste material conversion and recovery device comprises the following steps:
adding the graphene oxide slurry into a cathode reaction chamber, and adding water into an anode reaction chamber;
connecting the first electrode with the positive electrode of a power supply, connecting the second electrode with the negative electrode of the power supply, and performing reduction reaction by adopting direct current with the voltage of 0.5-3V; after the reaction is finished, the first electrode is disconnected with the positive electrode of the power supply, and the second electrode is disconnected with the negative electrode of the power supply;
filtering the solution in the anode reaction chamber to obtain a graphene and water mixture;
and carrying out vacuum freeze drying on the mixture of the graphene and the water to obtain graphene powder.
In some of these embodiments, the level of water added to the anode reaction chamber does not exceed 2/3 the height of the inner wall of the anode reaction chamber.
In some of these embodiments, the method further comprises the steps of: the second electrode was controlled to rotate at a speed of 0-50 rpm.
In some of these embodiments, the method further comprises the steps of: and when the graphene oxide slurry is in a solid state, soaking the graphene oxide waste for 3-12h, and then adding the graphene oxide waste into the cathode reaction chamber.
According to the graphene oxide waste material conversion and recovery device, the graphene oxide waste material is recovered by an electrochemical method, the electrochemical method is a green and efficient method for treating a water system solution, and when the graphene oxide is treated by the electrochemical cathode reduction method by utilizing the electrochemical characteristics of the graphene oxide, on one hand, the dispersed high-viscosity graphene oxide is efficiently converted and recovered into self-aggregated and easily separated graphene; on the other hand, the method does not need any other chemical medicine, does not generate any harmful substances in the environment, realizes green and pollution-free, and solves the problems of high cost, environmental unfriendliness, secondary pollution, difficult recovery, complex post-treatment and the like of the chemical treatment method in the traditional technology. The invention aims to prepare and treat graphene oxide waste through a green, expandable, efficient and low-cost path by adopting an electrochemical cathode reduction method. The graphene oxide waste material conversion and recovery device provided by the invention is simple in arrangement and simple and convenient in operation method, and can be used for reducing graphene oxide into self-agglomerated and easily-dispersed graphene only through a low-voltage power supply without any other chemical, generating no environmental harmful substances and realizing green and pollution-free operation, so that large-scale preparation can be expanded.
According to the graphene oxide waste conversion and recovery device, the driving mechanism is arranged to drive the second electrode to rotate, the rotating second electrode can accelerate the reduction reaction, and the graphene oxide waste treatment efficiency is improved.
The graphene oxide waste conversion and recovery device is provided with the driving mechanism to drive the second electrode to rotate at a speed of 0-50rpm, so that the reduction reaction can be accelerated, the graphene oxide waste treatment efficiency is improved, the driving mechanism is not suitable for driving the second electrode to rotate at an excessive speed, and when the driving mechanism is used for driving the second electrode to rotate at an excessive speed, such as more than 50rpm, the liquid flow rate in the cathode reaction chamber is excessive, so that self-aggregation and easy-separation graphene are not easy to aggregate.
The current introduced between the first electrode and the second electrode of the graphene oxide waste conversion and recovery device is low-voltage direct current, the voltage is 0.5-3V, electrochemical cathode reduction is promoted through the low-voltage current, and the graphene oxide waste treatment efficiency is improved.
The graphene oxide waste material conversion and recovery device is provided with the anode reaction chamber communicated with the cathode reaction chamber, so that the anode reaction chamber and the cathode reaction chamber can be conveniently processed and molded.
According to the graphene oxide waste material conversion and recovery device, the isolating piece is arranged as the filter screen, the mesh number of the isolating piece is 800-1200 meshes, the generated self-aggregation and easy-separation graphene can be effectively isolated, and the self-aggregation and easy-separation graphene is prevented from entering the anode reaction chamber.
According to the graphene oxide waste conversion and recovery device, the discharge hole is formed in the bottom of the cathode reaction chamber, so that self-aggregation and easily-separated graphene generated in the cathode reaction chamber can be conveniently discharged.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the application, and that other drawings can be derived from these drawings by a person skilled in the art without inventive effort.
For a more complete understanding of the present application and its advantages, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts in the following description.
Fig. 1 is a schematic view of a graphene oxide waste conversion and recovery apparatus according to an embodiment of the present invention.
Description of the reference numerals
10. A graphene oxide waste conversion and recovery device; 100. an anodic reaction assembly; 110. an anode reaction chamber; 120. a first electrode; 121. a first electrode frame; 122. a first microelectrode; 200. a cathode reaction assembly; 210. a cathode reaction chamber; 220. a second electrode; 221. a second electrode frame; 222. a second microelectrode; 230. a drive mechanism; 231. a drive motor; 232. an electric brush; 240. a drain valve; 300. a spacer.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The embodiment of the application provides a graphene oxide waste material conversion and recovery device 10 to solve the problems of high cost, environmental unfriendliness, secondary pollution, difficult recovery, complex post-treatment and the like in the existing graphene waste material treatment method. The following description will be made with reference to the accompanying drawings.
Fig. 1 shows an exemplary graphene oxide waste material conversion and recovery device 10 provided in an embodiment of the present application, and fig. 1 is a schematic structural diagram of the graphene oxide waste material conversion and recovery device 10 provided in an embodiment of the present application. The graphene oxide waste material conversion and recovery device 10 can be used for graphene waste material recovery and treatment.
In order to more clearly illustrate the structure of the graphene oxide waste material conversion and recovery device 10, the graphene oxide waste material conversion and recovery device 10 will be described below with reference to the accompanying drawings.
Exemplarily, please refer to fig. 1, and fig. 1 is a schematic structural diagram of a graphene oxide waste conversion and recovery apparatus 10 according to an embodiment of the present disclosure. A graphene oxide waste material conversion and recovery device 10 comprises an anode reaction assembly 100 and a cathode reaction assembly 200. The anode reaction assembly 100 includes an anode reaction chamber 110 and a first electrode 120. The first electrode 120 is installed in the anode reaction chamber 110. The first electrode 120 is used for connecting to the positive electrode of the power supply. The cathode reaction assembly 200 includes a cathode reaction chamber 210 and a second electrode 220. The second electrode 220 is installed in the cathode reaction chamber 210. The second electrode 220 is used for connecting a power supply cathode.
In some of these embodiments, the cathode reaction assembly 200 further includes a drive mechanism 230. The driving mechanism 230 is connected to the second electrode 220 for driving the second electrode 220 to rotate. According to the graphene oxide waste conversion and recovery device 10, the driving mechanism 230 is arranged, so that the driving mechanism 230 drives the second electrode 220 to rotate, the rotating second electrode 220 can accelerate the reduction reaction, and the graphene oxide waste treatment efficiency is improved.
In some of these embodiments, the drive mechanism 230 includes a drive motor 231 and a brush 232. The brush 232 is installed in the cathode reaction chamber 210, the brush 232 is in sliding fit with the second electrode 220 and is used for connecting a power supply cathode, and the driving motor 231 is connected with the second electrode 220 for driving the second electrode 220 to rotate.
In some embodiments, the driving mechanism 230 drives the second electrode 220 to rotate at a speed of 0-50 rpm. Preferably, the driving mechanism 230 can drive the second electrode 220 to rotate at a speed of 5-40 rpm. Still more preferably, the speed at which the driving mechanism 230 drives the second electrode 220 to rotate can also be 10-30 rpm. According to the graphene oxide waste material conversion and recovery device 10, the driving mechanism 230 is arranged to drive the second electrode 220 to rotate at a speed of 0-50rpm, so that the reduction reaction can be accelerated, the graphene oxide waste material treatment efficiency is improved, the driving mechanism 230 is not suitable for driving the second electrode 220 to rotate at an excessive speed, and when the driving mechanism 230 is used for driving the second electrode 220 to rotate at an excessive speed, such as more than 50rpm, the liquid flow rate in the cathode reaction chamber 210 is too high, so that the self-aggregation and easy-separation graphene is not easy to aggregate.
For example, in one embodiment, the driving mechanism 230 drives the second electrode 220 to rotate at a speed of 1rpm, and in another embodiment, the driving mechanism 230 drives the second electrode 220 to rotate at a speed of 50 rpm. It is understood that in other embodiments, the driving mechanism 230 may drive the second electrode 220 to rotate at 2rpm, 5rpm, 7rpm, 9rpm, 10rpm, 12rpm, 15rpm, 18rpm, 20rpm, 22rpm, 25rpm, 27rpm, 30rpm, 32rpm, 36rpm, 38rpm, 40rpm, 41rpm, 44rpm, 47rpm, 48rpm, 49rpm or other values.
In some of these embodiments, the first electrode 120 includes a first electrode frame 121 and a first microelectrode 122. At least a first micro-electrode 122 is disposed on the first electrode frame 121. For example, in one embodiment, a plurality of first microelectrodes 122 are disposed on the first electrode frame 121.
Preferably, as shown in fig. 1, the first electrode frame 121 has a frame-like structure. The drive shaft of the drive mechanism 230 is connected to the axis of the first electrode frame 121.
In some of these embodiments, the second electrode 220 includes a second electrode frame 221 and a second microelectrode 222. At least one second micro-electrode 222 is disposed on the second electrode frame 221. For example, in one embodiment, a plurality of second microelectrodes 222 are disposed on the second electrode frame 221. The number of the second micro-electrodes 222 is not limited, and the second micro-electrodes 222 are preferably arranged to cover the entire second electrode frame 221.
In some embodiments, the current flowing between the first electrode 120 and the second electrode 220 is low voltage DC, and the voltage is 0.5-3V. According to the graphene oxide waste conversion and recovery device 10, the current introduced between the first electrode 120 and the second electrode 220 is low-voltage direct current, the voltage is 0.5-3V, electrochemical cathode reduction is promoted through the low-voltage current, and the graphene oxide waste treatment efficiency is improved.
In some of these embodiments, the anode reaction chamber 110 is in communication with the cathode reaction chamber 210. Where the anode reaction chamber 110 communicates with the cathode reaction chamber 210, a separator 300 is provided. The separator 300 serves to isolate graphene. The graphene oxide waste conversion and recovery device 10 of the present invention is provided with the anode reaction chamber 110 communicated with the cathode reaction chamber 210, so as to facilitate the processing and molding of the anode reaction chamber 110 and the cathode reaction chamber 210, during the preparation, the anode reaction chamber 110 and the cathode reaction chamber 210 can be integrally molded, and a separator 300 is provided at a position where the anode reaction chamber 110 is communicated with the cathode reaction chamber 210 for separating graphene.
In some of these embodiments, the spacer 300 is a filter screen. The mesh number of the isolation piece 300 is 800 meshes and 1200 meshes. According to the graphene oxide waste conversion and recovery device 10, the partition 300 is a filter screen, the mesh number of the partition 300 is 800-1200 meshes, the generated self-aggregation and easy-separation graphene can be effectively isolated, and the self-aggregation and easy-separation graphene is prevented from entering the anode reaction chamber 110.
In some of these embodiments, the bottom of the cathode reaction chamber 210 is provided with a drain hole. A drain valve 240 is provided at the drain hole. According to the graphene oxide waste conversion and recovery device 10, the discharge hole is formed in the bottom of the cathode reaction chamber 210, so that the self-aggregation and easily-separated graphene generated in the cathode reaction chamber 210 can be conveniently discharged.
In some embodiments, the drain valve 240 may be a manual valve or an electric valve. When the drain valve 240 is an electric valve, the drain valve 240 and the driving device are all electrically connected to the control mechanism.
The invention also aims to provide a graphene oxide waste conversion and recovery method.
A graphene oxide waste material conversion and recovery method using the graphene oxide waste material conversion and recovery device 10 comprises the following steps:
the graphene oxide slurry is added to the cathode reaction chamber 210, and water is added to the anode reaction chamber 110.
Connecting the first electrode 120 with the positive electrode of a power supply, connecting the second electrode 220 with the negative electrode of the power supply, and performing reduction reaction by adopting direct current with the voltage of 0.5-3V; after the reaction is completed, the first electrode 120 is powered off, and the second electrode 220 is powered off.
The solution in the anode reaction chamber 110 is filtered to obtain a graphene and water mixture.
And carrying out vacuum freeze drying on the mixture of the graphene and the water to obtain graphene powder.
In some of these embodiments, the level of water added to the anode reaction chamber 110 does not exceed 2/3, the height of the interior walls of the anode reaction chamber 110.
In some embodiments, the method further comprises the following steps: the second electrode 220 is controlled to rotate at a speed of 0-50 rpm.
In some embodiments, the method further comprises the following steps: when the graphene oxide slurry is in a solid state, the graphene oxide waste is soaked for 3-12 hours and then added to the cathode reaction chamber 210.
According to the graphene oxide waste material conversion and recovery device 10, graphene waste material recovery is realized by an electrochemical method, the electrochemical method is a green and efficient method for treating a water system solution, and when graphene oxide is treated by an electrochemical cathode reduction method by utilizing the electrochemical characteristics of graphene oxide, on one hand, dispersed high-viscosity graphene oxide is efficiently converted and recovered into self-aggregated and easily separated graphene; on the other hand, the method does not need any other chemical medicine, does not generate any harmful substances in the environment, realizes green and pollution-free, and solves the problems of high cost, environmental unfriendliness, secondary pollution, difficult recovery, complex post-treatment and the like of the chemical treatment method in the traditional technology. The invention aims to prepare and treat graphene oxide waste through a green, expandable, efficient and low-cost path by adopting an electrochemical cathode reduction method. The graphene oxide waste conversion and recovery device 10 provided by the invention is simple in arrangement and simple and convenient in operation method, and can be used for reducing graphene oxide into self-aggregated and easily-dispersed graphene only through a low-voltage power supply without any other chemical, generating no environmental harmful substances and realizing green and pollution-free production, so that large-scale preparation can be expanded.
Example 1
The embodiment provides a method for converting and recycling graphene oxide waste. The graphene oxide waste material conversion and recovery method using the graphene oxide waste material conversion and recovery device 10 includes the following steps:
step 1: the graphene oxide slurry is added to the cathode reaction chamber 210, and water is added to the anode reaction chamber 110. The level of water added to the anode reaction chamber 110 does not exceed 2/3 the height of the inner wall of the anode reaction chamber 110. When the graphene oxide slurry is in a solid state, the graphene oxide waste is soaked for 3-12 hours and then added to the cathode reaction chamber 210.
Step 2: the second electrode 220 was controlled to rotate at a speed of 50 rpm.
And step 3: the first electrode 120 is connected with the positive electrode of a power supply, the second electrode 220 is connected with the negative electrode of the power supply, and direct current with the voltage of 0.5-3V is adopted for reduction reaction. After the reaction is completed, the first electrode 120 is powered off, and the second electrode 220 is powered off.
And 4, step 4: the solution in the anode reaction chamber 110 is filtered to obtain a graphene and water mixture.
And 5: and carrying out vacuum freeze drying on the mixture of the graphene and the water to obtain graphene powder. Or directly using the mixture of graphene and water as an additive.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (14)
1. The utility model provides a graphite oxide waste material conversion recovery unit which characterized in that includes:
the anode reaction assembly comprises an anode reaction chamber and a first electrode, the first electrode is arranged in the anode reaction chamber, and the first electrode is used for being connected with the positive pole of a power supply; and
the cathode reaction assembly comprises a cathode reaction chamber and a second electrode, the second electrode is arranged in the cathode reaction chamber, and the second electrode is used for being connected with a power supply cathode.
2. The graphene oxide waste conversion and recovery device of claim 1, wherein the cathode reaction assembly further comprises a driving mechanism, and the driving mechanism is connected to the second electrode.
3. The graphene oxide waste conversion and recovery device according to claim 2, wherein the driving mechanism comprises a driving motor and a brush, the brush is mounted in the cathode reaction chamber, the brush is in sliding fit with the second electrode and is used for connecting a power supply cathode, and the driving motor is connected with the second electrode.
4. The graphene oxide waste conversion and recovery device according to claim 2, wherein the speed of the driving mechanism driving the second electrode to rotate is 0-50 rpm.
5. The graphene oxide waste conversion and recovery device according to any one of claims 1 to 4, wherein the first electrode comprises a first electrode frame and a first microelectrode, and at least one first microelectrode is arranged on the first electrode frame.
6. The graphene oxide waste conversion and recovery device according to any one of claims 1 to 4, wherein the second electrode comprises a second electrode frame and a second microelectrode, and at least one second microelectrode is arranged on the second electrode frame.
7. The graphene oxide waste conversion and recovery device according to any one of claims 1 to 4, wherein the current passing between the first electrode and the second electrode is low-voltage direct current, and the voltage is 0.5 to 3V.
8. The graphene oxide waste conversion and recovery device according to any one of claims 1 to 4, wherein the anode reaction chamber is communicated with the cathode reaction chamber, and a separator is arranged at the position where the anode reaction chamber is communicated with the cathode reaction chamber.
9. The graphene oxide waste material conversion and recovery device as claimed in claim 8, wherein the separator is a filter screen, and the mesh number of the separator is 800-1200 meshes.
10. The graphene oxide waste conversion and recovery device according to any one of claims 1 to 4 or 9, wherein a drain hole is formed in the bottom of the cathode reaction chamber, and a drain valve is arranged at the drain hole.
11. A graphene oxide waste material conversion and recovery method using the graphene oxide waste material conversion and recovery apparatus according to any one of claims 1 to 10, comprising the steps of:
adding the graphene oxide slurry into a cathode reaction chamber, and adding water into an anode reaction chamber;
connecting the first electrode with the positive electrode of a power supply, connecting the second electrode with the negative electrode of the power supply, and performing reduction reaction by adopting direct current with the voltage of 0.5-3V; after the reaction is finished, the first electrode is disconnected with the positive electrode of the power supply, and the second electrode is disconnected with the negative electrode of the power supply;
filtering the solution in the anode reaction chamber to obtain a graphene and water mixture;
and carrying out vacuum freeze drying on the mixture of the graphene and the water to obtain graphene powder.
12. The graphene oxide waste conversion and recovery method according to claim 11, wherein the height of water added into the anode reaction chamber is not more than 2/3 of the height of the inner wall of the anode reaction chamber.
13. The graphene oxide waste conversion and recovery method according to claim 11, further comprising the steps of: the second electrode was controlled to rotate at a speed of 0-50 rpm.
14. The graphene oxide waste conversion and recovery method according to claim 11, further comprising the steps of: and when the graphene oxide slurry is in a solid state, soaking the graphene oxide waste for 3-12h, and then adding the graphene oxide waste into the cathode reaction chamber.
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| CN101634032A (en) * | 2009-08-14 | 2010-01-27 | 南京大学 | Green and fast electrochemical preparation method for graphene |
| CN104593802A (en) * | 2014-12-23 | 2015-05-06 | 中国科学院深圳先进技术研究院 | Electrochemical preparation method of graphene |
| CN106591871A (en) * | 2016-12-01 | 2017-04-26 | 燕园众欣纳米科技（北京）有限公司 | Method for preparing graphene through electrochemical in-situ oxidation and reduction |
| CN106676562A (en) * | 2016-12-13 | 2017-05-17 | 西安交通大学 | Method for preparing high-quality graphene through electrochemical reduction |
| US20210388513A1 (en) * | 2020-06-10 | 2021-12-16 | The Florida International University Board Of Trustees | Bipolar exfoliation and in-situ deposition of high-quality reduced graphene |
| CN113249740A (en) * | 2021-06-21 | 2021-08-13 | 广西师范大学 | Method for preparing graphene by electrochemical continuous and synchronous stripping and reduction |
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