CN110862080A - Method for preparing graphene - Google Patents

Abstract

The invention provides a method for preparing graphene in the field of chemistry, which comprises the following steps of (1) preparing; (2) dispersing GO into deionized water in a three-neck flask, and adding ammonia water under the action of ultrasonic waves and strong mechanical stirring, wherein the mass-volume ratio of GO to oxygen water is 1:5(g: mL); (3) after 1 hour, adding hydrazine hydrate, wherein the mass-to-volume ratio of GO to the hydrazine hydrate is 1:2(g: mL); (4) carrying out ultrasonic treatment and strong stirring for 2 hours, heating to 98-100 ℃ by using an oil bath, and reducing for 24 hours; (5) the prepared black product is filtered and washed by deionized water until the pH value is 7, and the method is simple to operate and easy to control the temperature.

Description

Method for preparing graphene

Technical Field

The invention belongs to the field of chemistry, and particularly relates to a method for preparing graphene.

Background

The Graphite Oxide (GO) reduction method has the advantages of high yield, low cost, easily obtained raw materials and the like, and is one of the most common and promising methods for preparing graphene.

In the prior art, the process of preparing graphene generally comprises three stages of low-temperature reaction, medium-temperature reaction and high-temperature reaction, and each stage needs precise temperature control; the technology is complicated to operate, and the temperature control is difficult to meet the specified requirements.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to overcome the defects in the prior art and provides a method for preparing graphene, which is simple to operate and easy to control temperature.

The purpose of the invention is realized as follows: a method of preparing graphene, comprising the steps of:

(1) fully cooling a polytetrafluoroethylene kettle liner, graphite (60 meshes), potassium permanganate and concentrated sulfuric acid to 2 ℃ in a refrigerator;

(2) dispersing GO into deionized water in a three-neck flask, and adding ammonia water under the action of ultrasonic waves and strong mechanical stirring, wherein the mass-volume ratio of GO to oxygen water is 1:5(g: mL);

(3) after 1 hour, adding hydrazine hydrate, wherein the mass-to-volume ratio of GO to the hydrazine hydrate is 1:2(g: mL);

(4) carrying out ultrasonic treatment and strong stirring for 2 hours, heating to 98-100 ℃ by using an oil bath, and reducing for 24 hours;

(5) the resulting black product was washed with deionized water by suction filtration to pH 7.

Detailed Description

A method of preparing graphene, comprising the steps of:

(1) fully cooling a polytetrafluoroethylene kettle liner, graphite (60 meshes), potassium permanganate and concentrated sulfuric acid to 2 ℃ in a refrigerator;

(2) dispersing GO into deionized water in a three-neck flask, and adding ammonia water under the action of ultrasonic waves and strong mechanical stirring, wherein the mass-volume ratio of GO to oxygen water is 1:5(g: mL);

(3) after 1 hour, adding hydrazine hydrate, wherein the mass-to-volume ratio of GO to the hydrazine hydrate is 1:2(g: mL);

(4) carrying out ultrasonic treatment and strong stirring for 2 hours, heating to 98-100 ℃ by using an oil bath, and reducing for 24 hours;

(5) the resulting black product was washed with deionized water by suction filtration to pH 7.

The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts based on the disclosed technical solutions, and these substitutions and modifications are all within the protection scope of the present invention.

Claims (1)

1. A method for preparing graphene, comprising the following steps:

(1) fully cooling a polytetrafluoroethylene kettle liner, graphite (60 meshes), potassium permanganate and concentrated sulfuric acid to 2 ℃ in a refrigerator;

(2) dispersing GO into deionized water in a three-neck flask, and adding ammonia water under the action of ultrasonic waves and strong mechanical stirring, wherein the mass-volume ratio of GO to oxygen water is 1:5(g: mL);

(3) after 1 hour, adding hydrazine hydrate, wherein the mass-to-volume ratio of GO to the hydrazine hydrate is 1:2(g: mL);

(4) carrying out ultrasonic treatment and strong stirring for 2 hours, heating to 98-100 ℃ by using an oil bath, and reducing for 24 hours;

(5) the resulting black product was washed with deionized water by suction filtration to pH 7.