Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of graphene

A graphene and pre-reaction technology, applied in the field of graphene, can solve the problems of high local temperature, high local temperature of reactants, affecting the quality of graphene, etc., and achieve the effect of good batch consistency

Inactive Publication Date: 2015-08-19
GUANGDONG ZHUGUANG NEW ENERGY TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a diluent is added to a strong oxidant, a large amount of heat will be released, causing the local temperature of the reactant to be too high, which will affect the quality of the final prepared graphene
[0005] In view of this, it is indeed necessary to develop a new graphene preparation method to solve the problem of excessive local temperature of reactants caused by adding diluent during the preparation of graphite oxide

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1, different from Comparative Example 1, this embodiment comprises the following steps:

[0033] Pre-reaction slurry configuration: according to graphite: potassium permanganate: concentrated sulfuric acid (mass concentration is 98%): the mass relation of sodium nitrate=2:5:60:1, in the reactor of 6 ℃, add the vitriol oil (mass Concentration is 98%), sodium nitrate, graphite and potassium permanganate, after being stirred uniformly, pre-reaction slurry is obtained;

[0034] Low-temperature reaction: place the pre-reaction slurry obtained above at 6°C for 4 hours to obtain a low-temperature reaction product;

[0035]Preparation of diluent: according to the mass relationship of deionized water: low temperature reaction product = 0.5:1, select deionized water at 25°C as the diluent, first inject deionized water into the reactor, and then slowly inject the low temperature reaction product into the above dilution In the agent, observe and record the phenomenon of...

Embodiment 2

[0040] Embodiment 2, different from Embodiment 1, this embodiment includes the following steps:

[0041] Preparation of diluent: according to the mass relationship of deionized water: low temperature reaction product = 0.05:1, select deionized water at 25°C as the diluent, first inject deionized water into the reactor, and then slowly inject the low temperature reaction product into the above dilution In the agent, observe and record the phenomenon of feeding time, material temperature change and dilution process.

[0042] Others are the same as in Example 1, and will not be repeated here.

Embodiment 3

[0043] Embodiment 3, different from Embodiment 1, this embodiment includes the following steps:

[0044] Preparation of diluent: according to the mass relationship of deionized water: low temperature reaction product = 5:1, select deionized water at 25°C as the diluent, first inject deionized water into the reactor, and then slowly inject the low temperature reaction product into the above dilution In the agent, observe and record the phenomenon of feeding time, material temperature change and dilution process.

[0045] Others are the same as in Example 1, and will not be repeated here.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention belongs to the technical field of graphene preparation, and particularly relates to a preparation method of graphene. The preparation method comprises the steps: in the process of preparation of graphite oxide, firstly a diluent with a proper temperature is selected and injected into a reactor; and secondly, a low-medium temperature reaction product is added into the diluent, so that the temperature of a diluted reactant is accurately controlled, and phenomenon that the partial temperature is overhigh in the dilution process is prevented. Compared to the prior art, when the graphene is prepared by using the method provided by the invention, the prepared graphene is relatively high in specific surface area, and the batch stability is remarkably higher.

Description

technical field [0001] The invention belongs to the technical field of graphene, in particular to a preparation method of graphene. Background technique [0002] In 2004, Andre K. Geim of the University of Manchester in the United Kingdom prepared graphene for the first time by mechanical exfoliation, which opened the prelude to the preparation and application of this material. The so-called graphene refers to a sheet-like body in which carbon atoms are arranged in a hexagonal ring, usually consisting of a single layer or multiple layers of graphite sheets, which can be infinitely extended in a two-dimensional space. Structural materials. It has outstanding advantages such as large specific surface area, excellent electrical and thermal conductivity, and low thermal expansion coefficient: specifically, high specific surface area (theoretical calculation value: 2630m 2 / g); high conductivity, carrier transport rate (200000cm 2 / V·s); high thermal conductivity (5000W / mK); h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01B31/04
Inventor 杨玉洁
Owner GUANGDONG ZHUGUANG NEW ENERGY TECH