Method for preparing large-area graphene paper by utilizing hydroiodic acid

A technology of graphene paper and hydroiodic acid, which is applied in the field of material science, can solve the problems of difficulty in obtaining large-area graphene paper, limiting the wide application of graphene paper, and high cost, and achieves simple and rapid preparation, low cost, and wide application value Effect

Inactive Publication Date: 2017-05-24
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the vacuum filtration method is widely used to filter the reduced graphene slurry to obtain graphene paper. This method is time-consuming and expensive, and it is difficult to obtain large-area graphene paper, which limits the wide application of graphene paper.

Method used

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  • Method for preparing large-area graphene paper by utilizing hydroiodic acid
  • Method for preparing large-area graphene paper by utilizing hydroiodic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Preparation of graphene oxide using an improved Hummers method:

[0032] Step 1. Add 20ml of concentrated sulfuric acid (98wt%) to a 1L three-necked flask and stir for 5min under ice-water bath conditions;

[0033] Step 2: Add 1g graphite slowly to the concentrated sulfuric acid solution;

[0034] Step 3: Add 0.5 g of sodium nitrate to the above mixed solution and react for 10 minutes;

[0035] Step 4. Add 3g of potassium permanganate slowly and stir for 90min, observe the color change from purple to dark green;

[0036] Step 5. Increase the temperature, the temperature of the water bath is 35°C, react for 40 minutes, and observe the color change from dark green to brown;

[0037] Step 6. Add 46ml of deionized water, add dropwise, then heat to 98°C and stir for 40min;

[0038] Step 7. Add 13ml hydrogen peroxide dropwise and stir for 15min;

[0039] Step 8. After the reaction, wait for the solution to cool, add deionized water, stand still, and remove the supernatant liquid;

[004...

Embodiment 2

[0051] 1) Preparation of graphene oxide using an improved Hummers method:

[0052] Step 1. Add 23ml of concentrated sulfuric acid (98wt%) to a 1L three-necked flask and stir for 5min under ice-water bath conditions;

[0053] Step 2: Add 1g graphite slowly to the concentrated sulfuric acid solution;

[0054] Step 3: Add 0.5 g of sodium nitrate to the above mixed solution and react for 10 minutes;

[0055] Step 4. Add 3g potassium permanganate slowly and slowly and stir for 93min, and observe the color change from purple to dark green;

[0056] Step 5: Increase the temperature, the temperature of the water bath is about 36°C, react for 45 minutes, and observe that the color changes from dark green to brown;

[0057] Step 6. Add 46ml of deionized water, add dropwise, then heat to 98°C and stir for 40min;

[0058] Step 7. Add 15ml hydrogen peroxide dropwise and stir for 20min;

[0059] Step 8. After the reaction, wait for the solution to cool, add deionized water, stand still, and remove the s...

Embodiment 3

[0071] 1) Preparation of graphene oxide using an improved Hummers method:

[0072] Step 1. Add 25ml of concentrated sulfuric acid (98wt%) to a 1L three-necked flask and stir for 5min under ice-water bath conditions;

[0073] Step 2: Add 1g graphite slowly to the concentrated sulfuric acid solution;

[0074] Step 3: Add 0.5 g of sodium nitrate to the above mixed solution and react for 10 minutes;

[0075] Step 4. Add 3 g of potassium permanganate slowly and stir for 96 minutes, and observe that the color changes from purple to dark green;

[0076] Step 5: Raise the temperature, the temperature of the water bath is about 38°C, react for 53 minutes, and observe that the color changes from dark green to brown;

[0077] Step 6. Add 46ml of deionized water, add dropwise, then heat to 98°C and stir for 40min;

[0078] Step 7. Add 17ml hydrogen peroxide dropwise and stir for 15min;

[0079] Step 8. After the reaction, wait for the solution to cool, add deionized water, stand still, and remove the ...

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Abstract

The invention provides a method for preparing large-area graphene paper by utilizing hydroiodic acid. The method comprises the following steps: (1) preparing oxidized graphene by utilizing an improved Hummers method; (2) dispersing the oxidized graphene prepared in the step (1) in deionized water with ultrasonic to form uniformly dispersed oxidized graphene solution, and drying the oxidized graphene solution to obtain oxidized graphene paper; (3) putting the oxidized graphene paper obtained in the step (2) in a glass-substrate container; and (4) washing the reactant with deionized water after the reducing reaction is completed, and drying to obtain the large-area graphene paper. The method can be used for simply and quickly preparing graphene paper by utilizing hydroiodic acid reducing culture dish and other glass-substrate oxidized graphene paper, has simple, efficient, stable and controllable process flow, has the cost far lower than those of conventional graphene paper preparation methods, and has a wide application value in supercapacitors, electrodes, optoelectronic devices and the like.

Description

Technical field [0001] The invention relates to a method for preparing large-area graphene paper by using hydroiodic acid, and belongs to the technical field of materials science. Background technique [0002] Graphene has shown great potential application value in many fields such as electronics and optics due to its excellent electrical conductivity, light transmittance, heat transfer and mechanical properties. The redox method for preparing graphene has become the most effective method for preparing a large amount of graphene and realizing its industrial application. The method is divided into two methods: firstly oxidizing graphite to graphene oxide, and then reducing it with a certain reducing agent to obtain redox graphene. In this process, the former has become mature, and how to obtain large-area, high-quality redox graphene using reducing agents is still a huge challenge, and it is the key to realize the multifunctional application of graphene. Graphene paper is a film ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184C01B32/198
Inventor 郭新立张伟杰赵丽葛创张弘毅王小娟刘园园祝龙
Owner SOUTHEAST UNIV
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