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Novel route for preparing graphene using ethanol as liquid phase by planetary ball mill wet method

A planetary ball mill, graphene technology, applied in the direction of graphene, nano-carbon, etc., can solve the problems of low efficiency, poor controllability of the tape tearing method, and hindering the application of graphene.

Inactive Publication Date: 2018-03-06
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 route for preparing graphene using ethanol as liquid phase by planetary ball mill wet method
  • Novel route for preparing graphene using ethanol as liquid phase by planetary ball mill wet method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1. Weigh 5g of graphite and place it in a ceramic jar, and after calcining in a muffle furnace at 300°C for 2 hours, place the calcined expanded graphite in a brown glass vessel for substitution;

[0014] 2. Weigh 0.5g of expanded graphite, put it in a beaker, then pour 20ml of ethanol organic solution into the beaker, and stir it ultrasonically for 60min before use; control the molar ratio of graphite to ethanol to be 1:4;

[0015] 3. Pour the above liquid into the 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 centrifuge with deionized water Graphene can be obtained after taking the supernatant and freeze-drying for 24 hours.

Embodiment 2

[0017] 1. Weigh 3g of graphite and place it in a ceramic jar, and after calcining in a muffle furnace at 290°C for 2.5 hours, place the calcined expanded graphite in a brown glass vessel for substitution;

[0018] 2. Weigh 0.6g of expanded graphite, put it in a beaker, then pour 25ml of ethanol organic solution into the beaker, and stir it ultrasonically for 50min before use; control the molar ratio of graphite to ethanol to be 1:4;

[0019] 3. Pour the above liquid into the agate jar, shake it to a uniform state, then put the agate jar on the planetary ball mill, after 600 rpm / min and 2.5h, pour out the liquid in the agate jar, and centrifuge with deionized water Afterwards, the supernatant was freeze-dried for 24 hours to obtain graphene.

Embodiment 3

[0021] 1. Weigh 3.5g of graphite and place it in a ceramic jar, and after calcining in a muffle furnace at 310°C for 1.5h, place the calcined expanded graphite in a brown glass vessel for substitution;

[0022] 2. Weigh 0.35g of expanded graphite, put it in a beaker, then pour 18ml of ethanol organic solution into the beaker, and stir it ultrasonically for 40min before use; control the molar ratio of graphite to ethanol to be 1:4;

[0023] 3. Pour the above liquid into the agate jar, shake it to a uniform state, then put the agate jar on the planetary ball mill, after 450 rpm / min and 3.5h, pour out the liquid in the agate jar, and centrifuge with deionized water Afterwards, the supernatant was freeze-dried for 24 hours to obtain graphene.

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Abstract

The invention provides a novel rout for preparing graphene using ethanol as liquid phase by a planetary ball mill wet method. The preparation method comprises the following steps: using expanded graphite after being calcinated at a high temperature as a raw material, using ethanol as an organic solution, and grinding and mechanically exfoliating the expanded graphite by the planetary ball mill wetmethod to obtain the graphene with a relatively complete sheet layer and relatively large crystal size. The method has the advantages of simple production process and low cost. The prepared graphenehas fewer defects, more complete sheet layers, and broader prospect for the future application of the graphene compared with dry graphene.

Description

technical field [0001] The invention relates to a new method for preparing graphene by using ethanol as a liquid-phase planetary ball mill wet method, and belongs to the technical field of advanced nanometer material 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...

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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