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Iron disulfide/nitrogen-doped graphene nanocomposite, preparation and application

A technology of nitrogen-doped graphene and nanocomposite materials, which is applied in the field of hydrogen evolution electrocatalysis, can solve problems such as complex energy consumption, and achieve the effects of simple operation, wide range of sources, and low cost

Inactive Publication Date: 2017-05-24
GUANGDONG IND TECHN COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are relatively few literature reports on this aspect at present, and energy-consuming and complicated methods such as chemical vapor deposition and atomic etching are mainly used, so it is necessary to develop a simple and large-scale production method

Method used

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  • Iron disulfide/nitrogen-doped graphene nanocomposite, preparation and application
  • Iron disulfide/nitrogen-doped graphene nanocomposite, preparation and application
  • Iron disulfide/nitrogen-doped graphene nanocomposite, preparation and application

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Experimental program
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Effect test

Embodiment 1

[0042] This embodiment includes the following steps:

[0043] (1) Graphene oxide was prepared by the modified Hummers method.

[0044](2) 1 mmol of iron acetylacetonate, 5 mmol of L-cysteine ​​and 1 mmol of EDTA were dissolved in 15 mL of sodium tartrate-tartrate buffer solution (pH=3) at room temperature. Then 5mL of 1-octylamine and 10mL of ethanol were added to the above solution under magnetic stirring to form a uniform solution, and finally 120mg of the graphene oxide obtained in step 1 was further stirred and ultrasonicated for 1 h, so that the graphene oxide was evenly distributed in the solution.

[0045] (3) Add the solution obtained in step 2 into the reaction kettle, heat the reaction at 220° C. for 24 hours, and then let it cool down to room temperature naturally. Finally, the black precipitate was collected by centrifugation, washed thoroughly with deionized water and ethanol six times, and dried in a vacuum oven at 60 °C for 24 h to obtain FeS 2 / NG nanocomposi...

Embodiment 2

[0049] This embodiment includes the following steps:

[0050] (1) Graphene oxide was prepared by the modified Hummers method.

[0051] (2) 4 mmol of iron acetylacetonate, 4 mmol of L-cysteine ​​and 4 mmol of EDTA were dissolved in 15 mL of sodium tartrate-tartrate buffer solution (pH=3) at room temperature. Then 5mL of 1-octylamine and 10mL of ethanol were added to the above solution under magnetic stirring to form a uniform solution, and finally 120mg of the graphene oxide obtained in step 1 was further stirred and ultrasonicated for 1 h, so that the graphene oxide was evenly distributed in the solution.

[0052] (3) Add the solution obtained in step 2 into the reactor, heat the reaction at 200° C. for 20 h, and then let it cool down to room temperature naturally. Finally, the black precipitate was collected by centrifugation, washed thoroughly with deionized water and ethanol six times, and dried in a vacuum oven at 60 °C for 24 h to obtain FeS 2 / NG nanocomposites.

Embodiment 3

[0054] This embodiment includes the following steps:

[0055] (1) Graphene oxide was prepared by the modified Hummers method.

[0056] (2) 3 mmol of iron acetylacetonate, 2 mmol of L-cysteine ​​and 3 mmol of EDTA were dissolved in 15 mL of sodium tartrate-tartrate buffer solution (pH=3) at room temperature. Then 5mL of 1-octylamine and 10mL of ethanol were added to the above solution under magnetic stirring to form a uniform solution, and finally 120mg of the graphene oxide obtained in step 1 was further stirred and ultrasonicated for 1 h, so that the graphene oxide was evenly distributed in the solution.

[0057] (3) Add the solution obtained in step 2 into the reaction kettle, heat the reaction at 180° C. for 6 hours, and then let it cool down to room temperature naturally. Finally, the black precipitate was collected by centrifugation, washed thoroughly with deionized water and ethanol six times, and dried in a vacuum oven at 60 °C for 24 h to obtain FeS 2 / NG nanocomposi...

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Abstract

The invention belongs to the technical field of hydrogen evolution electrocatalysis and discloses an iron disulfide / nitrogen-doped graphene nanocomposite, preparation and application. A preparation method includes the following steps that an iron disulfide precursor solution is mixed with graphene oxide, a hydrothermal method reaction is carried out, and the iron disulfide / nitrogen-doped graphene nanocomposite is obtained. L-cysteine is adopted as a sulfur source and a reducing agent, ammonia water serves as a nitrogen source, ferric acetylacetonate serves as iron salt, a FeS2 nanocube is subjected to homogeneous nucleation growth on an NG surface through a hydrothermal method, and the FeS2 / NG nanocomposite is obtained, wherein the nitrogen content ranges from 0.38 wt% to 1.12 wt%; and by means of good hydrogen evolution electrocatalysis performance of iron disulfide and high specific surface area and high conductivity of nitrogen-doped grapheme, a good electrocatalysis hydrolysis hydrogen production effect is shown, and the nanocomposite can be applied to the field of hydrogen evolution electrocatalysis, especially preparation of hydrogen evolution electrocatalysis materials and can be directly used as an electrode material for electrocatalysis hydrolysis hydrogen production.

Description

technical field [0001] The invention belongs to the technical field of hydrogen evolution electrocatalysis, in particular to an iron disulfide / nitrogen-doped graphene nanocomposite material and its preparation method and application. Background technique [0002] Energy shortage and environmental degradation are common concerns in today's society, and finding clean energy and renewable energy has become a topic of common concern to all countries in the world. With the development of society and the advancement of science and technology, the development and utilization of various new energy sources requires the development of different types of energy storage devices to achieve efficient conversion and utilization of new energy sources. Hydrogen, as a promising clean chemical fuel, is an ideal energy carrier for renewable energy applications. Hydrogen production by electrolysis of water is an important part of some emerging clean energy technologies. Although Pt-based cataly...

Claims

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Application Information

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IPC IPC(8): C25B11/06C25B1/04
CPCC25B1/04C25B11/04Y02E60/36
Inventor 邱文达黎彧张泽敏游遨
Owner GUANGDONG IND TECHN COLLEGE
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