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Novel method for preparing graphene with glycerol as liquid phase by using planetary muller through wet method

A technology of planetary ball mill and glycerol, applied in the direction of graphene, nano-carbon, etc., can solve the problems that hinder the application of graphene, the quality of graphene is uneven, and the size of graphene is small

Inactive Publication Date: 2018-01-12
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the efficiency of the tape tearing method is too low and the quality of the prepared graphene is uneven. Mortar grinding and stirring ball milling cannot peel graphite well because of the low energy provided by the equipment itself and the crystal size prepared is small. Although the ball mill can provide Higher grinding energy, but the impact force during grinding will make the prepared graphene smaller in size and more edge defects in the prepared graphene
The general disadvantage of existing physical exfoliation methods is that the obtained graphene is usually relatively small in size and poor in controllability
This will greatly hinder the application of graphene in practical devices

Method used

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  • Novel method for preparing graphene with glycerol as liquid phase by using planetary muller through wet method
  • Novel method for preparing graphene with glycerol as liquid phase by using planetary muller through wet method

Examples

Experimental program
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Embodiment 1

[0013] 1. Weigh 2g of graphite and place it in a ceramic jar and control the volume ratio of graphite in the ceramic jar to 1:1.5, then calcined in a muffle furnace at 300°C for 2 hours, and place the calcined expanded graphite in Serve in a brown glass container;

[0014] 2. Weigh 1g of expanded graphite, put it in a beaker, then pour 20ml of glycerol organic solution at a certain temperature into the beaker, and stir it ultrasonically for 60 minutes before use; control the molar ratio of graphite to ethanol to 1:4, The ultrasonic power range is 200W, and the glycerin organic solution is kept at 35°C for 300min before use, and the stirring temperature is controlled at 35°C;

[0015] 3. Pour the above liquid into the insulated agate jar, shake it to a uniform state, then put the agate jar on the planetary ball mill, after 500 rpm / min and 3h, pour out the liquid in the agate jar, and use a deionized After water centrifugation, the supernatant was taken and freeze-dried for 24 ...

Embodiment 2

[0017] 1. Weigh 3g of graphite and place it in a ceramic jar and control the volume ratio of graphite in the ceramic jar to 1:2, then calcined in a muffle furnace at 280°C for 3 hours, then place the calcined expanded graphite in Serve in a brown glass container;

[0018] 2. Weigh 0.5g of expanded graphite, put it in a beaker, then pour 15ml of glycerol organic solution at a certain temperature into the beaker, and stir it ultrasonically for 80min before use; control the molar ratio of graphite to ethanol to 1:3.5 , the ultrasonic power range is 300W, and the glycerin organic solution is kept at 30°C for 40 minutes before use, and the stirring temperature is controlled at 30°C;

[0019] 3. Pour the above liquid into the insulated agate jar, shake it to a uniform state, then put the agate jar on the planetary ball mill, after 400 rpm / min and 4h, pour out the liquid in the agate jar, and use a deionized After water centrifugation, the supernatant was taken and freeze-dried for ...

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Abstract

The invention provides a novel method for preparing graphene with glycerol as a liquid phase by using a planetary muller through a wet method. The preparation method comprises the following specific steps: by taking expanded graphite after high-temperature calcination as a raw material and glycerol as an organic solution, performing mechanical peeling on the expanded graphite by using the planetary muller through wet-type grinding, thereby obtaining graphene which is relatively complete in lamella and relatively large in crystal size. The novel method is simple in production process, low in cost, relatively small in defect when being compared with dry-type graphene, relatively complete in lamella, and relatively wide in application prospect.

Description

technical field [0001] The invention relates to a new method for preparing graphene by using glycerol as a liquid-phase planetary ball mill wet method, and belongs to the technical field of advanced nanomaterial preparation technology. Background technique [0002] Graphene, as a carbon material with a single atomic layer thickness and a two-dimensional honeycomb structure, has a huge specific surface area, ultra-high electron mobility and stable properties, and is widely used in the fields of electronics, sensors, medicine and catalysis. Provide new ideas and directions for wider research on nanocomposites. Since the discovery of graphene, it has become the focus of research by experts and scholars from various countries, and it is also considered to be a new material for improving the fields of sensors, medicine and catalysis. my country is the country with the most abundant graphite resources and a major producer, but the exploration of its high-tech deep processing is s...

Claims

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Application Information

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IPC IPC(8): C01B32/19
Inventor 马振壬王琦宋鹏杨中喜张京波卢露
Owner UNIV OF JINAN
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