Preparation method of graphene based on ascorbic acid

A technology of ascorbic acid and graphene, applied in the field of preparation of nanomaterial technology, can solve problems such as harm to people and the environment, and achieve the effect of shortening reaction time and being beneficial to mass production

Active Publication Date: 2009-12-16
上海碳源汇谷新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existence of dispersants will undoubtedly have an adverse effect on the subsequen

Method used

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  • Preparation method of graphene based on ascorbic acid
  • Preparation method of graphene based on ascorbic acid
  • Preparation method of graphene based on ascorbic acid

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Experimental program
Comparison scheme
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Embodiment 1

[0029] Such as figure 1 As shown, the preparation method described in this embodiment comprises the following steps:

[0030] 1. At room temperature, add 2g of 500-mesh granular natural graphite and 1g of sodium nitrate into a 250mL three-necked flask and cool to 0°C; then, slowly add 50mL of concentrated sulfuric acid into the three-necked flask and fully stir for 30 minutes while maintaining the temperature of the reaction system Not higher than 5°C; then add 0.3 grams of potassium permanganate into the there-necked flask and stir fully for 30 minutes, while keeping the temperature of the reaction system not higher than 10°C; within 1 hour, divide 7 grams of potassium permanganate into 3 Add batches into the three-necked flask, and keep the temperature of the reaction system not higher than 20°C. Finally, the cold bath was removed, and the temperature of the reaction system was heated to 35±3° C. with a water bath, and stirred thoroughly for 2 hours to obtain a brown graphi...

Embodiment 2

[0035] 1. At room temperature, add 2g of 500-mesh granular natural graphite and 1g of sodium nitrate into a 250mL three-necked flask and cool to -5°C; then, slowly add 50mL of concentrated sulfuric acid into the there-necked flask and stir for 30 minutes, and keep the temperature of the reaction system The temperature is lower than 0°C; then add 0.3 grams of potassium permanganate into the three-necked flask and stir it fully for 30 minutes, while keeping the temperature of the reaction system not higher than 5°C; within 1 hour, divide 7 grams of potassium permanganate into 3 Add batches into the three-necked flask, and keep the temperature of the reaction system not higher than 15°C. Finally, the cold bath was removed, and the temperature of the reaction system was heated to 35±3° C. with a water bath, and stirred thoroughly for 2 hours to obtain a brown graphite suspension.

[0036] 2. Slowly add 90mL deionized water into the three-necked flask, the temperature of the system...

Embodiment 3

[0040] 1. Preparation of graphite oxide: At room temperature, add 2 g of 500-mesh granular natural graphite and 1 g of sodium nitrate into a 250 mL three-necked flask and cool to -10°C; then, slowly add 50 mL of concentrated sulfuric acid into the three-necked flask and stir for 30 minutes. And keep the temperature of the reaction system lower than -5°C; then add 0.3 grams of potassium permanganate into the three-necked flask and fully stir for 30 minutes, while keeping the temperature of the reaction system not higher than 0°C; within 1 hour, add 7 grams of potassium permanganate Potassium manganate was added into the three-necked flask in 3 batches, and the temperature of the reaction system was kept not higher than 10°C. Finally, the cold bath was removed, and the temperature of the reaction system was heated to 35±3° C. with a water bath, and stirred thoroughly for 2 hours to obtain a brown graphite suspension.

[0041] 2. Slowly add 90mL deionized water into the three-nec...

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Abstract

The invention relates to a preparation method of graphene based on ascorbic acid, belonging to the technical field of nano materials. The preparation method comprises the following steps: preparing brown graphite suspending liquid; preparing luminous yellow graphite diluent; preparing graphite oxide solid; dispersing graphite oxide into deionized water, separating graphene oxide by ultrasonic separation treatment for 1 hour and preparing graphene oxide solution; and fully mixing the graphene oxide solution and ascorbic acid water solution, stewing and obtaining the graphene solution. The preparation adopts the ascorbic acid as a reducing agent, shortens reaction time under the condition that no stabilizing agent is added, obtains single-layer grapheme with the thickness of 0.8 to 1.2nm and is beneficial to batch production of the grapheme.

Description

technical field [0001] The invention relates to a preparation method in the technical field of nanomaterials, in particular to a method for preparing graphene based on ascorbic acid. Background technique [0002] Graphene, an ideal two-dimensional honeycomb crystal composed of a single layer of carbon atoms, has excellent electrical, thermal and mechanical properties due to its unique shape and structure. It is used in nanoelectronic devices, composite materials, solar cells, supercapacitors, Hydrogen storage materials and other fields have broad application prospects. [0003] After retrieving existing related documents, it is found that in order to prepare this nanomaterial, researchers have utilized different methods, such as Novoselov et al. published a paper entitled "Electric field effect in atomically thin carbon films" (the electric field effect of atomic carbon film), which reported the method of preparing single-crystal graphene film by using micromechanical metho...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82B3/00
Inventor 郭守武张佳利
Owner 上海碳源汇谷新材料科技有限公司
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