Graphene preparation method for stripping graphite through cooperation of ultrasound and rays
Through the method of collaborative peeling of ultrasonic and cathode rays, the problems of low production efficiency and low yield in graphene preparation by traditional mechanical separation methods are solved, and more efficient and higher quality graphene preparation is achieved.
Patent Information
- Application Number
- CN202411771577.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-03-21
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional mechanical separation methods have problems of low production efficiency and low yield in graphene preparation.
The method of synergistic peeling of ultrasonic and cathode rays is adopted to prepare graphene by setting a metal plate, an ultrasonic vibrating plate and a graphite plate in a reactor equipped with the reaction solution, and peeling the graphite plate using ultrasonic vibration and cathode rays.
It improves the production efficiency and product quality of graphene, which is more efficient and has better quality than traditional mechanical production methods.
Smart Images
Figure CN119660727A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of graphene preparation, and in particular relates to a graphene preparation method for collaboratively exfoliating graphene using ultrasound and radiation. Background Art
[0002] Graphene is an allotrope of carbon, with carbon atoms arranged in sp 2 Hybrid bonding forms a single-layer hexagonal honeycomb lattice graphene. Graphene's crystal structure can be used to construct fullerene (C60), graphene quantum dots, carbon nanotubes, nanobelts, multi-walled carbon nanotubes and nanohorns. Graphene has excellent optical, electrical and mechanical properties, and has important application prospects in materials science, micro-nano processing, energy, biomedicine and drug delivery. It is considered to be a revolutionary material in the future.
[0003] Graphene layers stacked together (more than 10 layers) form graphite, which is held together by van der Waals forces and has a crystal plane spacing of 0.335 nanometers. The preparation of graphene is the process of breaking up graphite.
[0004] The traditional mechanical separation method is to grind the graphite material, which puts pressure on the grinding structure and easily leads to mechanical damage, low production efficiency and low yield rate. Summary of the invention
[0005] In order to overcome the above technical problems, the present invention provides a method for preparing graphene by synergistically exfoliating graphene using ultrasound and radiation, which uses ultrasound and cathode rays to exfoliate graphite to prepare graphene, thereby improving production efficiency and quality.
[0006] The present invention adopts the following technical solutions:
[0007] A method for preparing graphene by synergistically exfoliating graphite using ultrasound and radiation, wherein a metal plate, an ultrasonic vibration plate and a graphite plate are arranged in a reactor filled with a reaction solution, the graphite plate is connected to the positive electrode of a power source, and the metal plate is connected to the negative electrode of a power source, and the ultrasonic vibration of the ultrasonic vibration plate and the cathode rays of the metal plate are used to simultaneously exfoliate the graphite plate, thereby preparing graphene.
[0008] Preferably, in the reactor, a graphite plate is placed between the ultrasonic vibration plate and the metal plate.
[0009] Preferably, a metal plate is inserted between the two ultrasonic vibration plates, a graphite plate is installed between the metal plate and each of the two ultrasonic vibration plates, and the outer peripheral edge of the graphite plate is closer to the inside than the edge of the metal plate. The side edge of the metal plate extends toward the ultrasonic vibration plate to form a side plate, the side plate corresponds to the side of the graphite plate, the side plate has several through holes, and two ultrasonic vibration plates, a metal plate, and two graphite plates form a stripping module.
[0010] Preferably, an agitator is arranged at the center of the reactor, and two groups of stripping modules are arranged in the reactor, and the two groups of stripping modules are respectively arranged on both sides of the agitator.
[0011] Preferably, the side wall of the reactor is connected to the crushing chamber and the cooling tower, and both the crushing chamber and the cooling tower are equipped with pumps to drive the reaction solution to flow through themselves so as to form a material circulation between themselves and the reactor.
[0012] Preferably, an energy-focusing ultrasonic vibrating rod is used in the crushing chamber to crush the graphite fragments flowing through the crushing chamber, and a low-temperature circulation box is used in the crushing chamber to cool the solution inside the crushing chamber from the side wall interlayer of the crushing chamber.
[0013] Preferably, the inner shape of the reactor is not cylindrical.
[0014] Preferably, the inner shape of the reactor is a hexagonal prism.
[0015] Preferably, the distance between the metal plate and the graphite plate is 1 cm, and the distance between the ultrasonic vibration plate and the graphite plate is 10 cm.
[0016] Preferably, the graphite plate is a graphite plate without adding a surfactant and an oxidant, the pH value of the reaction solution is 1.8-2.8, the conductivity is 2-4 ms / cm, and the solid content is 0.5-0.55%.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] 1. The present invention utilizes cathode rays and ultrasonic vibration to jointly peel off graphene, which has higher production efficiency and product quality than traditional mechanical production methods;
[0019] 2. The present invention places the graphite plate connected to the anode between the cathode metal plate and the ultrasonic vibration plate, and the edges of the graphite plate are closer to the inside than the edges of the metal plate, so that the cathode rays can impact and peel off the various sides of the graphite plate, thereby increasing the production speed. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is an overall schematic diagram of the present invention;
[0021] Figure 2 yes Figure 1 Enlarged schematic diagram at point A in the middle.
[0022] Description of reference numerals:
[0023] 1 Reactor; 2 Agitator; 3 Cooling tower; 4 Crushing chamber; 5 Ultrasonic vibration plate; 6 Graphite plate; 7 Metal plate; 8 Side plate. DETAILED DESCRIPTION
[0024] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. Unless otherwise specified, the raw materials and equipment used can be purchased from the market or are commonly used in the art. The methods in the embodiments are conventional methods in the art unless otherwise specified. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0025] Method for preparing graphene by synergistically exfoliating graphite using ultrasound and radiation
[0026] The internal shape of the reactor 1 is a hexagonal prism. An agitator 2 is arranged at the center of the reactor 1. A group of stripping modules are arranged on both sides of the agitator 2 in the reactor 1 filled with the reaction solution. The stripping modules are composed of two ultrasonic vibration plates 5, a metal plate 7, and two graphite plates 6. The graphite plate 6 is connected to the positive pole of the power supply, and the metal plate 7 is connected to the negative pole of the power supply. The power supply is a 3000W 48V power supply with a constant voltage of 30V and a constant current of 20A. The ultrasonic vibration of the ultrasonic vibration plate 5 and the cathode ray of the metal plate 7 are used to simultaneously strip the graphite plate 6 to prepare graphene. Specifically, a metal plate 7 is inserted between two ultrasonic vibration plates 5 in the stripping module, and a 40cm*80cm*5cm graphite plate 6 is installed between the metal plate 7 and the two ultrasonic vibration plates 5, the distance between the metal plate 7 and the graphite plate 6 is 1cm, the distance between the ultrasonic vibration plate 5 and the graphite plate 6 is 10cm, and the outer edge of the graphite plate 6 is closer to the inside than the edge of the metal plate 7, the size of the metal plate 7 is 42cm*82cm*5cm, each edge of the metal plate 7 exceeds the graphite plate by 1cm, and the side of the metal plate 7 extends to the side of the ultrasonic vibration plate to form a side plate 8, which corresponds to the side of the graphite plate 6, and has several through holes. The ultrasonic vibration plate 5 and the stirrer 2 are both installed on the top wall of the reactor 1, and the metal plate 7 and the graphite plate 6 are installed on the top wall of the reactor 1 through the top mounting frame and connected to electricity at the top.
[0027] The cathode rays emitted by the cathode metal plate 7 and the physical vibration of the ultrasonic vibration plate 5 act together on the graphite plate, overcoming the van der Waals force between the graphite layers, breaking up and destroying the stacked structure of the graphite, and obtaining partial graphene.
[0028] The side wall of the reactor 1 is connected to the crushing chamber 4 and the cooling tower 3. The crushing chamber 4 and the cooling tower 3 are both equipped with pumps to drive the reaction solution to flow through themselves so as to form a material circulation between themselves and the reactor 1. The crushing chamber 4 uses an energy-concentrating ultrasonic vibrating rod to crush the graphite fragments flowing through the crushing chamber 4 to obtain some graphene. The crushing chamber 4 uses an additional low-temperature circulation box to cool the solution inside the crushing chamber 4 from the side wall interlayer of the crushing chamber 4. The cooling tower 3 cools the solution in the reactor 1.
[0029] The prepared graphene is dispersed in a reaction solution, and then extracted to obtain graphene.
[0030] In some embodiments, the pH value of the reaction solution is 1.8-2.8, the conductivity is 2-4 ms / cm, the solid content is 0.5-0.55%, and no surfactant or oxidant is added during the reaction, so that graphene can be prepared more efficiently.
[0031] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the above embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A method for preparing graphene by synergistically exfoliating graphene using ultrasound and radiation, characterized in that: A metal plate, an ultrasonic vibration plate and a graphite plate are placed in a reactor filled with a reaction solution, the graphite plate is connected to the positive electrode of a power supply, and the metal plate is connected to the negative electrode of a power supply. The ultrasonic vibration of the ultrasonic vibration plate and the cathode rays of the metal plate are used to simultaneously peel off the graphite plate to prepare graphene.
2. The method for preparing graphene by cooperatively exfoliating graphene by ultrasound and radiation according to claim 1, characterized in that: In the reactor, a graphite plate is placed between the ultrasonic vibration plate and the metal plate.
3. The method for preparing graphene by cooperatively exfoliating graphene by ultrasound and radiation according to claim 2, characterized in that: A metal plate is inserted between the two ultrasonic vibration plates, and a graphite plate is installed between the metal plate and the two ultrasonic vibration plates, and the outer peripheral edge of the graphite plate is closer to the inside than the edge of the metal plate. The side edge of the metal plate extends out a side plate toward the ultrasonic vibration plate, and the side plate corresponds to the side of the graphite plate. The side plate has several through holes. Two ultrasonic vibration plates, a metal plate, and two graphite plates form a stripping module.
4. The method for preparing graphene by cooperatively exfoliating graphene by ultrasound and radiation according to claim 3, characterized in that: A stirrer is arranged at the center of the reactor, and two groups of stripping modules are arranged in the reactor. The two groups of stripping modules are respectively arranged at both sides of the stirrer.
5. The method for preparing graphene by cooperatively exfoliating graphene by ultrasound and radiation according to claim 4, characterized in that: The side wall of the reactor is connected to the crushing chamber and the cooling tower. Both the crushing chamber and the cooling tower are equipped with pumps to drive the reaction solution to flow through themselves so as to form a material circulation between themselves and the reactor.
6. The method for preparing graphene by cooperatively exfoliating graphene by ultrasound and radiation according to claim 5, characterized in that: The crushing chamber uses an energy-focusing ultrasonic vibrating rod to crush the graphite fragments flowing through the crushing chamber, and the crushing chamber uses a low-temperature circulation box to cool the solution inside the crushing chamber from the side wall interlayer of the crushing chamber.
7. The method for preparing graphene by cooperatively exfoliating graphene by ultrasound and radiation according to claim 3, characterized in that: The internal shape of the reactor is not cylindrical.
8. The method for preparing graphene by cooperatively exfoliating graphene using ultrasound and radiation according to claim 7, characterized in that: The internal shape of the reactor is a hexagonal prism.
9. The method for preparing graphene by cooperatively exfoliating graphene by ultrasound and radiation according to claim 3, characterized in that: The distance between the metal plate and the graphite plate is 1 cm, and the distance between the ultrasonic vibration plate and the graphite plate is 10 cm.
10. The method for preparing graphene by cooperatively exfoliating graphene using ultrasound and radiation according to claim 1, characterized in that: The graphite plate adopts a graphite plate without adding a surfactant and an oxidant, the pH value of the reaction solution is 1.8-2.8, the conductivity is 2-4ms / cm, and the solid content is 0.5-0.55%.