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Preparation method of three-dimensional porous nitrogen-doped graphene modified by iron-based alloy nanoparticles

A nitrogen-doped graphene and nanoparticle technology is applied in graphene, nanocarbon, nanotechnology and other directions to achieve the effects of low cost, good repeatability, and simple and easy operation.

Active Publication Date: 2020-01-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

According to literature research, there is no report on the preparation of iron-based alloy nanoparticles modified three-dimensional porous nitrogen-doped graphene composites by in-situ high-temperature chemical foaming

Method used

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  • Preparation method of three-dimensional porous nitrogen-doped graphene modified by iron-based alloy nanoparticles
  • Preparation method of three-dimensional porous nitrogen-doped graphene modified by iron-based alloy nanoparticles
  • Preparation method of three-dimensional porous nitrogen-doped graphene modified by iron-based alloy nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh polyvinylpyrrolidone powder, ferric nitrate nonahydrate and cobalt nitrate hexahydrate according to a mass ratio of 1:0.8:0.7, and dissolve polyvinylpyrrolidone powder, ferric nitrate nonahydrate and cobalt nitrate hexahydrate separately in deionized water to prepare a mixture Stir the solution ultrasonically for 10 minutes, then place the mixed solution in a blast drying oven at 80°C until it is completely dry, then grind the dried product into powder and transfer the powder to a crucible. The crucible is placed in a tube furnace. In an Ar atmosphere, it was heated to 700°C at a heating rate of 5°C / min and kept for 1h. After the tube furnace was cooled, the black foamed product was collected to obtain the iron-cobalt alloy nanoparticle modified three-dimensional porous nitrogen-doped graphene composite material.

Embodiment 2

[0023] Weigh polyvinylpyrrolidone powder, ferric nitrate nonahydrate and cobalt nitrate hexahydrate according to a mass ratio of 1:1.0:0.5, and dissolve polyvinylpyrrolidone powder, ferric nitrate nonahydrate and cobalt nitrate hexahydrate separately in deionized water to prepare a mixture Stir the solution ultrasonically for 10 minutes, then place the mixed solution in a blast drying oven at 80°C until it is completely dry, then grind the dried product into powder and transfer the powder to a crucible. The crucible is placed in a tube furnace. In an Ar atmosphere, it was heated to 700°C at a heating rate of 5°C / min and kept for 1h. After the tube furnace was cooled, the black foamed product was collected to obtain the iron-cobalt alloy nanoparticle modified three-dimensional porous nitrogen-doped graphene composite material.

Embodiment 3

[0025] Weigh polyvinylpyrrolidone powder, ferric nitrate nonahydrate and cobalt nitrate hexahydrate according to the mass ratio of 1:1.3:0.2, and dissolve polyvinylpyrrolidone powder, ferric nitrate nonahydrate and cobalt nitrate hexahydrate separately in deionized water to prepare a mixture Stir the solution ultrasonically for 10 minutes, then place the mixed solution in a blast drying oven at 80°C until it is completely dry, then grind the dried product into powder and transfer the powder to a crucible. The crucible is placed in a tube furnace. In an Ar atmosphere, it was heated to 700°C at a heating rate of 5°C / min and kept for 1h. After the tube furnace was cooled, the black foamed product was collected to obtain the iron-cobalt alloy nanoparticle modified three-dimensional porous nitrogen-doped graphene composite material.

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Abstract

The invention discloses a preparation method of iron-based alloy nano particle modified three-dimensional porous nitrogen-doped graphene. The preparation method comprises the following technological processes: 1. respectively dissolving ferric sulfate nonahydrate, other metallic nitrates and polyvinylpyrrolidone into deionized water to prepare a mixed solution, and ultrasonically stirring the solution for 5 to 10 min; 2. placing the obtained mixed solution into an air blasting drying box for complete drying, and then grinding the mixed solution into powder; 3. transferring the powder obtainedby grinding into a crucible, and then putting the crucible into a tubular furnace into an Ar atmosphere for heating at 1 to 20 DEG C / min to 500 to 900 DEG C, then preserving the heat for 1 to 3 hours,and obtaining a black foam-like product, namely the iron-based alloy nano particle modified three-dimensional porous nitrogen-doped graphene composite material. According to the preparation method disclosed by the invention, a series of iron-based alloy nano particle modified three-dimensional porous nitrogen-doped graphene composite materials can be prepared by controlling reaction conditions; the method is novel, short in production period, low in cost and high in repetitiveness, can realize large-scale preparation, has an important reference function for the preparation of graphene-based metal composite material, and also has a wide application prospect in the field of energy storage, catalysis and the like.

Description

Technical field [0001] The invention belongs to the field of functional nanomaterials, and in particular relates to a method for preparing a three-dimensional porous nitrogen-doped graphene composite material modified by iron-based alloy nanoparticles. Background technique [0002] As a new type of carbon material, graphene has been extensively studied in the fields of electronic equipment, sensors, catalysts, energy storage, and metal composite materials due to its excellent physical, mechanical, and electronic properties. The traditional methods of preparing graphene include mechanical exfoliation, oxidation-reduction, chemical vapor deposition, electrolysis, etc. However, the yield of graphene prepared by these methods is small and the cost is high, and some methods also bring environmental problems; in catalytic materials And in the field of electromagnetic wave absorbing materials, graphene sheets in the form of two-dimensional stacks have many limitations. Therefore, three...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184B82Y30/00B22F9/24
CPCB22F9/24B82Y30/00C01B2204/20
Inventor 李平韩坤刘志伟刘颖谭奇伟安富强曲选辉
Owner UNIV OF SCI & TECH BEIJING