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Preparation method of graphene

A graphene and graphite technology, which is applied in the field of preparing graphene by ultrasonically exfoliating chloride-intercalated graphite, can solve problems such as low yield and poor graphene performance, and achieve the effects of few graphene layers, simple equipment and high yield

Inactive Publication Date: 2013-10-23
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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Problems solved by technology

[0003] At present, the method of preparing graphene mainly adopts the chemical vapor deposition method, and the graphene prepared by it is of high quality, but the output is small and the performance of graphene is poor.

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preparation example Construction

[0014] A kind of graphene preparation method that present embodiment provides, such as figure 1 shown, including the following steps:

[0015] S1. Add the chloride intercalated graphite to the beaker, then add deionized water, and stir to form a chloride intercalated graphite suspension with a concentration of 5-10 g / L;

[0016] S2. Heating the chloride intercalated graphite suspension to 80-90° C., and ultrasonicating for 30-60 minutes to obtain a graphene solution;

[0017] S3, the graphene solution is filtered, and then the graphene after filtering and acetone or ethanol is made into the graphene suspension that concentration is 5~10g / L; Preferably acetone;

[0018] S4. Ultrasonicate the graphene suspension at room temperature for 5 to 10 minutes and then filter to obtain the graphene filtrate, then wash and filter the graphene filtrate with deionized water several times, and then dry the cleaned graphite at 60°C The olefin filtrate was obtained for 8-12 hours to obtain g...

Embodiment 1

[0028] 1. Weigh 15g of graphite and 12g of ferric chloride intercalation material into a quartz tube, seal the quartz tube, heat up at 460°C, keep warm, and react for 6 hours. After the reaction, cool to room temperature to obtain ferric chloride intercalated graphite ;

[0029] 2. Take 10g of ferric chloride intercalated graphite and add it to a beaker, then add 2L of deionized water, and stir to form a ferric chloride intercalated graphite suspension with a concentration of 5g / L;

[0030] 3. Put the beaker in a 150W ultrasonic cleaner and heat it to 90°C for 30 minutes to obtain a graphene solution;

[0031] 4. Filter the graphene solution, then make it with acetone to form a suspension with a concentration of 5g / L, and filter again after ultrasonication at room temperature for 5 minutes to obtain the graphene filtrate;

[0032] 5. Wash and filter the graphene filtrate repeatedly with deionized water, and use AgNO3 to detect the absence of chloride ions in the filtrate, and...

Embodiment 2

[0035] 1. Weigh 15g of graphite and 15g of copper chloride intercalation material into a quartz tube, seal the quartz tube, heat up at 480°C, keep warm, and react for 4 hours. After the reaction, cool to room temperature to obtain copper chloride intercalated graphite ;

[0036] 2. Take 10g of copper chloride intercalated graphite and add it to a beaker, then add 1L of deionized water, and stir to form a copper chloride intercalated graphite suspension with a concentration of 10g / L;

[0037] 3. Put the beaker in a 150W ultrasonic cleaner and heat it to 80°C for 60 minutes to obtain a graphene solution;

[0038] 4. Filter the graphene solution, then make it with acetone to form a suspension with a concentration of 10g / L, and then filter again after ultrasonication at room temperature for 10 minutes to obtain the graphene filtrate;

[0039] 5. Wash and filter the graphene filtrate repeatedly with deionized water, and use AgNO3 to detect the absence of chloride ions in the filtr...

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Abstract

The invention belongs to the field of graphene, and discloses a preparation method of graphene, which comprises the following steps: preparing chloride intercalated graphite into a chloride intercalated graphite suspension; carrying out heating and ultrasonic treatment on the chloride intercalated graphite suspension to obtain a graphene; filtering the graphene solution, and preparing the filtered graphene and acetone into a graphene suspension; and carrying out ultrasonic and filtration treatment on the graphene suspension at room temperature, and removing chloride to obtain the graphene. By utilizing ultrasonic to strip the chloride intercalated graphite to prepare the graphene, the ultrasonic stripping method disclosed by the invention has the advantages of smaller number of layers of graphene, high yield, simple equipment, and simple and feasible operation, and can easily implement automatic and industrial production; and meanwhile, the graphene prepared by the ultrasonic stripping method has the advantages of fewer defects and complete crystal structure.

Description

technical field [0001] The invention relates to a method for preparing graphene, in particular to a method for preparing graphene by using ultrasonic exfoliation of chloride intercalation graphite. Background technique [0002] After its discovery in 1841, intercalated graphite has been extensively and in-depth researched on its properties and applications. Because it maintains the good properties of graphite and has some unique properties, it can be used in conductors, superconductors, batteries and other fields. Graphene is a two-dimensional carbon atom crystal discovered by Andre K. Geim of the University of Manchester in 2004; due to its unique structure and photoelectric properties, graphene has become a carbon material, nanometer Research hotspots in the fields of technology, condensed matter physics and functional materials have attracted many scientific and technological workers. [0003] At present, the method for preparing graphene mainly adopts the chemical vapor...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/19
Inventor 周明杰袁新生王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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