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Method for preparing graphene oxide based on gelatin, and application

A graphene and gelatin technology, applied in chemical instruments and methods, applications, inorganic chemistry, etc., can solve problems such as high cost, unsafe, complicated process, and achieve low cost, high conductivity, safe and controllable process Effect

Active Publication Date: 2019-10-22
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, in order to solve the technical problems of unsafe factors, complicated process flow and high cost in the method for preparing graphene oxide in the prior art, the present invention provides a method and application of preparing graphene oxide based on gelatin

Method used

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  • Method for preparing graphene oxide based on gelatin, and application
  • Method for preparing graphene oxide based on gelatin, and application
  • Method for preparing graphene oxide based on gelatin, and application

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preparation example Construction

[0046] Step 2, the preparation of graphene oxide

[0047] The gelatin matrix of fixed form obtained in step 1 is carried out high-temperature carbonization treatment under the protection of inert gas atmosphere, is cooled to room temperature, obtains graphene oxide (such as figure 1As shown, this process undergoes carbonization, dehydrogenation, and denitrogenation of gelatin, and finally obtains graphene oxide).

[0048] In the above technical scheme, in step 1, gelatin is an existing technology, which can be obtained commercially without special restrictions, and is preferably a mixture of one or more of edible gelatin, medicinal gelatin, photographic gelatin, and industrial gelatin; the solvent mainly Dissolving effect, on the basis of not changing the gelatin composition, as long as the solvent that can dissolve the gelatin effect can be realized, it is preferably a mixture of one or more of water, glycerol, formic acid or acetic acid; the dissolution condition is preferab...

Embodiment 1

[0061] Step 1. Weigh 2g of gelatin and add it to 5mL of water, heat and magnetically stir until the gelatin is completely dissolved, then filter to obtain a gelatin solution, transfer the gelatin solution to a glass mold with a 5mL inner cavity, and evaporate the solvent in an oven , directly demoulding to obtain a cube block gelatin matrix;

[0062] Step 2. Put the cubic block gelatin matrix obtained in Step 1 in a tube furnace, and calcine it under the protection of argon. First, gradually increase the temperature from room temperature to 200° C. at a rate of 5° C. / min, and keep the temperature constant for 1 hour. Then, Raise the temperature to 400°C at a rate of 5°C / min, hold the temperature for 1 hour, and finally raise the temperature to 600°C at a rate of 5°C / min, hold the temperature for 1 hour, and cool to room temperature to obtain graphene oxide.

Embodiment 2

[0064] Step 1. Weigh 3g of gelatin and add it to 5mL of formic acid. Stir magnetically until the gelatin is completely dissolved. After filtration, the gelatin solution is obtained. Transfer the gelatin solution to a cylindrical glass mold with a cylindrical cavity, evaporate the solvent in an oven, and remove the gelatin directly. The mold obtains the cylindrical gelatin matrix;

[0065] Step 2. Place the cylindrical gelatin matrix obtained in Step 1 in a tube furnace, and calcine it under the protection of argon. First, gradually increase the temperature from room temperature to 100°C at a rate of 2°C / min, and keep the temperature constant for 1h. Then, Raise the temperature to 500°C at a rate of 5°C / min, hold the temperature for 1 hour, and finally raise the temperature to 1000°C at a rate of 10°C / min, hold the temperature for 1 hour, and cool to room temperature to obtain graphene oxide.

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Abstract

The invention relates to a method for preparing graphene oxide based on gelatin, and application thereof, and belongs to the technical field of graphene oxide. The technical problem that the method for preparing the graphene oxide in the prior art is unsafe, complex in process flow and high in cost is solved. The preparation method comprises the following steps: dissolving gelatin with solvent, and filtering to remove impurity to obtain a gelatin solution; volatizing the solvent in the gelatin solution to obtain a gelatin matrix in a fixed shape; and performing high-temperature carbonization treatment on the gelatin matrix in the fixed shape under the protection of the inert gas atmosphere protection, and cooling to room temperature to obtain graphene oxide. The preparation method takes biomass as a precursor to prepare the graphene oxide, the raw material is rich in resource, cheap and easy to obtain, pollution-free and renewable; and meanwhile, the method is safe and controllable inprocess, simple in flow and easy to operate.

Description

technical field [0001] The invention belongs to the technical field of graphene oxide, in particular to a method and application for preparing graphene oxide based on gelatin. Background technique [0002] Graphene is a two-dimensional carbon nanomaterial with excellent mechanical properties, electrical properties, thermal properties and optical properties, and has broad application prospects in transparent conductive films, field emission transistors, flexible electronic devices, sensors and supercapacitors. . As a derivative of graphene, graphene oxide has a similar structure. Due to the presence of oxygen-containing groups in its structure, graphene oxide has strong reactivity and good hydrophilicity, which can improve the mechanics, electricity and It has a more prominent effect on thermal performance. In the prior art, methods for preparing graphene oxide mainly include Hummers method, improved Hummers method, Brodie method, Staudenmaier method and the like. These me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198G01H11/08A61B5/02A61B5/00
CPCA61B5/02A61B5/6802A61B2562/02C01B32/198G01H11/08
Inventor 由爱梅张强
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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