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Electricity-conductive graphene oxide, and preparation method and application thereof

A conductive oxidation and graphene technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of cumbersome steps, unsuitable for large-scale production, and long reaction time, so as to prolong the reaction time and realize partial oxidation The effect of short action and reaction time

Inactive Publication Date: 2019-08-02
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the existing preparation method needs to strictly control the reaction temperature in the reaction process, the reaction time is long, and the steps are cumbersome, so it is not suitable for large-scale production

Method used

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  • Electricity-conductive graphene oxide, and preparation method and application thereof
  • Electricity-conductive graphene oxide, and preparation method and application thereof
  • Electricity-conductive graphene oxide, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A kind of conductive graphene oxide, it is made by following preparation method:

[0056] A. Preparation of pretreated graphite by low temperature oxidation:

[0057] Add 20mL of concentrated sulfuric acid (98% concentration by mass) into a reaction vessel, then slowly add 1g of potassium permanganate and 1g of flake graphite (180 mesh), and keep stirring for 10min under water bath conditions (water bath temperature is 5°C) ;

[0058] Increase the temperature of the water bath to 35°C, and continue stirring for 2 hours; then add the reaction solution into 200mL of ice water, and add hydrogen peroxide with a mass fraction of 30% dropwise until no foam is produced, and continue stirring during this process; The liquid was filtered and washed to neutrality to obtain graphite slurry;

[0059] B. Sonicate the alkaline solution of pretreated graphite in a cell disruptor:

[0060] Add the above-mentioned graphite slurry into 1mol / L NaOH solution, place it in a cell disrupto...

Embodiment 2

[0065] A kind of conductive graphene oxide, it is made by following preparation method:

[0066] A. Preparation of pretreated graphite by low temperature oxidation:

[0067] Add 20mL of concentrated sulfuric acid (98% concentration by mass) into a reaction vessel, then slowly add 1g of potassium permanganate and 1g of flake graphite (325 mesh), and keep stirring for 5min under water bath conditions (water bath temperature is 0°C) ;

[0068] Increase the temperature of the water bath to 35°C, and continue stirring for 1 hour; then add the reaction solution into 200 mL of ice water, and add hydrogen peroxide with a mass fraction of 30% dropwise until no foam is produced, and continue stirring during this process; The liquid was filtered and washed to neutrality to obtain graphite slurry;

[0069] B. Sonicate the alkaline solution of pretreated graphite in a cell disruptor:

[0070] Add the above-mentioned graphite slurry into 1mol / L NaOH solution, place it in a cell disruptor...

Embodiment 3

[0075] A kind of conductive graphene oxide, it is made by following preparation method:

[0076] A. Preparation of pretreated graphite by low temperature oxidation:

[0077] Add 200mL of concentrated sulfuric acid (98% concentration by mass) into a reaction vessel, then slowly add 10g of potassium permanganate and 10g of flake graphite (12000 mesh), and continue stirring for 8min under water bath conditions (water bath temperature is 0°C) ;

[0078] Increase the temperature of the water bath to 30°C, and continue stirring for 1 hour; then add the reaction solution into 2000 mL of ice water, and add hydrogen peroxide with a mass fraction of 30% dropwise until no foam is produced, and continue stirring during this process; The liquid was filtered and washed to neutrality to obtain graphite slurry;

[0079] B. Sonicate the alkaline solution of pretreated graphite in a cell disruptor:

[0080] Add the above-mentioned graphite slurry into 0.8mol / L NaOH solution, place it in a ce...

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Abstract

The embodiment of the invention relates to the field of new materials, in particular to an electricity-conductive graphene oxide, and a preparation method and application thereof. According to the preparation method for the electricity-conductive graphene oxide provided by the invention, graphene oxide is partially oxidized and intercalated through reactions in a low-temperature stage and a medium-temperature stage; the graphene oxide is peeled by ultrasonic under an alkaline condition; the graphene oxide can be fully peeled without full oxidization of graphite; the temperature required by thereaction is low; and the electricity-conductive graphene oxide is safe and controllable. Moreover, the damage to conjugated structures caused by partial oxidation is relatively less; the original electricity conductivity of the graphite is also maintained as possible, so that the electricity-conductive graphene oxide prepared by the preparation method is only oxidized at a low degree; the oxidization degree is low; a lamellar structure is maintained relatively well and has electricity conductivity; and a single lamellar structure is dispersed stably in water. The electricity-conductive graphene oxide prepared by the preparation method has a potential application value in the fields of electricity-conductive composite materials and the like.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a conductive graphene oxide and its preparation method and application. Background technique [0002] Graphene oxide (GO) and reduced graphene oxide (RGO) have been widely studied as derivatives of graphene. Hummers method and improved Hummers method are the most widely used to prepare graphene oxide. The C / The O ratios are all less than 1, that is, the prepared graphene oxide has a high degree of oxidation, and the surface contains abundant functional groups, which provides conditions for its composite with materials or the construction of functional materials. [0003] But, there are following problems in existing method preparation graphene oxide: [0004] (1) The introduction of a large number of oxygen atoms destroys the conjugated structure of the original graphite, so the graphene oxide prepared by the Hummers method and the improved Hummers method has a high degree of oxida...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198
CPCC01B32/198
Inventor 张建明张泽军黄莎莎段咏欣侯家瑞
Owner QINGDAO UNIV OF SCI & TECH
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