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Universal method for preparing nitrogen-doped graphene by recycling metal salt through 3d printing

A nitrogen-doped graphene, 3D printing technology, applied in the fields of environmental materials and energy, can solve the problems of high sintering temperature, harmful etching conditions, non-recyclable templates, etc., achieve uniform shrinkage, reduce experimental risks, and flexible structure selectivity Effect

Pending Publication Date: 2022-03-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has inherent disadvantages, including high sintering temperature (1350 °C), harmful etching conditions (HF) and non-recyclable templates (SiO 2 )

Method used

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  • Universal method for preparing nitrogen-doped graphene by recycling metal salt through 3d printing
  • Universal method for preparing nitrogen-doped graphene by recycling metal salt through 3d printing
  • Universal method for preparing nitrogen-doped graphene by recycling metal salt through 3d printing

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0032] Fabrication of graphene foams templated with metallic nickel. With 56g nickel sulfate, 3mL Variquat CC 42NS, 22ml hexanediol diacrylate, 3ml ethoxylated trimethylolpropane triacrylate, 0.5g diphenyl-(2,4,6-trimethylbenzyl Acyl)phosphine, mixed and stirred at room temperature for 24 hours. A uniform nickel sulfate resin is obtained. Afterwards, it was designed into a double helix structure using digital light processing technology and printed out. Finally, the structure was sintered in a muffle furnace at 1100 °C for 5 hours. A nickel oxide template was prepared. Afterwards, the nickel oxide template is first reduced to a metal nickel template by using an argon-hydrogen mixed gas at 600° C. for ten hours to keep warm. Subsequently, using chemical deposition, pyrrole was used as a carbon source and nitrogen source, after 40 minutes of heat preservation at 800°C, it was rapidly cooled to room temperature, and the metal nickel template was removed with dilute acid. The...

example 2

[0034] Fabrication of graphene foam templated with metallic cobalt. With 58g cobalt sulfate, 3mL Variquat CC 42NS, 22ml hexanediol diacrylate, 3ml ethoxylated trimethylolpropane triacrylate, 0.5g diphenyl-(2,4,6-trimethylbenzyl Acyl)phosphine, mixed and stirred at room temperature for 24 hours. A homogeneous cobalt sulfate resin is obtained. Afterwards, it was designed into a double helix structure using digital light processing technology and printed out. Finally, the structure was sintered in a muffle furnace at 1100 °C for 5 hours. A cobalt oxide template was prepared. Afterwards, the cobalt oxide template is first reduced to a metal cobalt template by using an argon-hydrogen mixed gas at 600° C. for ten hours at a temperature of 10 hours. Subsequently, using chemical deposition, pyrrole was used as the carbon source and nitrogen source, after being kept at 800°C for 40 minutes, it was rapidly cooled to room temperature, and the metal cobalt template was removed with di...

example 3

[0036] Fabrication of graphene foams templated with metallic iron. With 28g ferric sulfate nonahydrate, 3mL Variquat CC 42NS, 11ml hexanediol diacrylate, 1.5ml ethoxylated trimethylolpropane triacrylate, 0.5g diphenyl-(2,4,6-trimethyl benzoyl) phosphine, mixed and stirred at room temperature for 24 hours. A uniform iron sulfate resin is obtained. Afterwards, it was designed into a double helix structure using digital light processing technology and printed out. Finally, the structure was sintered in a muffle furnace at 800 °C for 5 hours. Iron oxide templates were prepared. Afterwards, the iron oxide template is first reduced to a metal iron template by using an argon-hydrogen mixed gas at 600° C. for ten hours to keep it warm. Subsequently, using chemical deposition, pyrrole was used as the carbon source and nitrogen source, after being kept at 800°C for 40 minutes, it was rapidly cooled to room temperature, and the metal iron template was removed with dilute acid. The o...

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Abstract

The invention discloses a universal method for preparing nitrogen-doped graphene by recycling metal salt through 3d printing, and belongs to the technical field of energy and environmental materials. Firstly, a double-helix structure template is designed through computer software; the preparation method comprises the following steps: firstly, preparing a metal salt, then mixing and stirring metal salt, Variquat CC 42NS, hexanediol diacrylate, ethoxylated trimethylolpropane triacrylate and diphenyl-(2, 4, 6-trimethylbenzoyl) phosphorus oxide to obtain uniform metal salt resin, and then printing the metal salt resin into a double-helix structure by adopting a digital light processing technology; sintering in air to obtain a metal oxide template; heating and reacting the metal oxide template to obtain a metal template; heating and reacting the metal template, and removing the metal template by using dilute acid; cleaning the obtained graphene with deionized water, and then drying to obtain nitrogen-doped graphene; the excellent mechanical property of the composite material is about 16000 times of load of the weight of the composite material without obvious deformation. And under the conditions that the compression is 75% and the compression strength is 100kpa, circulation is performed for 100 times, and the structure is kept.

Description

technical field [0001] The invention belongs to the technical field of energy and environmental materials, and in particular relates to a method for preparing nitrogen-doped graphene from a general 3D printing recyclable metal salt. Background technique [0002] The rapid development of next-generation flexible electronics, including portable electronics, foldable displays, and wearable devices, requires independent flexible power sources. High charging speed and capacity are also key to making high-performance electronics. However, the lack of reliable materials with excellent electron and ion transport capabilities, mechanical flexibility, and stability poses a challenge to fabricate excellent energy storage devices. Graphene, a two-dimensional material, is currently the most commonly used electrode in various energy and environment-related applications due to its large surface area. Graphene can be transferred to flexible surfaces of any shape and easily folded into des...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/186B33Y10/00B33Y70/10
CPCC01B32/186B33Y10/00B33Y70/00C01B2204/26
Inventor 徐茜付港文杜俊杰李晨官操
Owner NORTHWESTERN POLYTECHNICAL UNIV
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