Preparation method of graphite

A technology of graphene and intercalated graphite, which is applied in the field of new material synthesis, can solve the problem of not being able to take into account the high performance and high output of graphene at the same time, and achieve the effect of less defects, good mechanical properties, and high output

Inactive Publication Date: 2013-11-13
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

These methods currently have some shortcomings, such as the inability to take into account the high performance and high yield of the prepared graphene at the same time.

Method used

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  • Preparation method of graphite

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preparation example Construction

[0015] The preparation method of graphene provided by the invention comprises the following steps:

[0016] (1) Take intercalated graphite and place it in a sealed reactor. The intercalated substance between the intercalated graphite layers is an explosive substance, and the intercalated graphite is added in a ratio of 1 to 5 g / L to the volume of the reactor ;

[0017] (2) Heat the sealed reactor to 280~500°C to cause the explosive reaction to occur. After reaching the heating temperature, keep it for 1~5 minutes, stop heating, cool down, exhaust, and collect the solid product , the solid product is graphene.

[0018] Step (1) is to place the intercalated graphite in which the interlayer intercalated substance is an explosive substance in a sealed environment. The intercalated graphite can be prepared by common chemical or electrochemical methods.

[0019] The operation process of the chemical method is as follows: add natural flake graphite, explosive substances, ferric ch...

Embodiment 1

[0027] A kind of preparation method of graphene, comprises the following steps:

[0028] (1) Take 2g of nitromethane-intercalated graphite, put it in a 1L stainless steel reactor, and then seal the reactor;

[0029] Nitromethane-intercalated graphite is prepared by chemical method, and the preparation process is as follows: the natural flake graphite, nitromethane, ferric chloride and chromium trioxide are mixed according to the mass ratio of 1:3:0.8:0.4, under constant stirring Add it into a three-necked flask equipped with a reflux condensing device and a stirrer, put it in a constant temperature water bath at 60°C, stir and react for 60 minutes, wash until the solution is colorless and the pH value is neutral, filter it with suction, and vacuum at 50°C Dry in a drying oven for 20 hours to obtain nitromethane-intercalated graphite.

[0030] (2) Place the sealed reactor in a heating furnace and heat it to 500°C to cause the nitromethane to react explosively. After keeping it...

Embodiment 2

[0035] A kind of preparation method of graphene, comprises the following steps:

[0036] (1) Take 3g of potassium nitrate-intercalated graphite, put it in a 1L stainless steel reactor, and then seal the reactor;

[0037] Potassium nitrate-intercalation graphite is prepared by electrochemical method, the preparation process is as follows: use stainless steel sheet as current collector, press natural phosphorus flake graphite into 75×40×7mm 3 (about 2g) graphite sheet as the working electrode, lead plate as the counter electrode, Hg / Hg 2 SO 4 As a reference electrode, use a potassium nitrate solution with a concentration of 0.5mol / L as the electrolyte, put the three electrodes into the electrolytic cell and completely soak in the electrolyte, at 20mA / cm 2 The current density, the reaction at room temperature for 24 hours, potassium nitrate-intercalated graphite can be obtained.

[0038](2) Put the sealed reactor in a heating furnace and heat it to 400°C to cause an explosive ...

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Abstract

The invention provides a preparation method of graphite. The method comprises the following steps: placing intercalation graphite in a sealed reactor, wherein an insert substance between the layers of the intercalation graphite is an explosive substance, and the addition of the intercalation graphite is 1-5 g / L according to the volume of the reactor; heating the sealed reactor to 280-500 DEG C to induce explosion reaction on the explosive substance; after reaching the heating temperature, maintaining for 1-5 min and stopping the heating; and cooling, discharging gas and collecting a solid product namely the graphite. The invention employs simple equipment and simple feasible operations, and is easy to realize large-scale industrial production. The prepared graphite has high yield, good mechanical property, strong conductivity, and does not contain corrosive elements such as sulfur and chlorine; and the graphite has the advantages of little defect and complete crystal structure compared with the graphite prepared by a common redox method.

Description

technical field [0001] The invention relates to the field of new material synthesis, in particular to a method for preparing graphene. 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. [0003] 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, it has become a research hotspot in the fields of carbon materials, nanotechnology, condensed matter physics and functional materials, attracting many scientific and technological workers. Single-layer graphene has excellent electrical and thermal conductivity and low thermal expansion coefficient, and its theoretical specific surface area is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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