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Method for preparing nitrogen-doped graphene with polydopamine as raw material

A nitrogen-doped graphene and polydopamine technology, applied in graphene, nano-carbon and other directions, can solve the problems of dangerous chemical reagents, difficult preparation and high cost, and achieves easy reaction process, simple and easy preparation method and low cost. Effect

Inactive Publication Date: 2014-02-26
南京大学扬州化学化工研究院 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems of high toxicity and dangerous chemical reagents used in the current preparation method of nitrogen-doped graphene, difficult preparation and high cost, the technical purpose of the present invention is to propose a low-cost, fast, green and safe production of a few layers A new method of nitrogen-doped graphene, the products prepared by this method can be widely used in electronic devices, composite materials, sensing, biological analysis, energy storage materials and other fields

Method used

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  • Method for preparing nitrogen-doped graphene with polydopamine as raw material
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  • Method for preparing nitrogen-doped graphene with polydopamine as raw material

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Embodiment 1

[0027] The method for preparing nitrogen-doped graphene with polydopamine as raw material described in this embodiment comprises the following steps:

[0028] 1) Preparation method of raw material polydopamine: put the cleaned nickel foam into 2 mg / mL freshly prepared dopamine solution (Tris-HCl 50mM, pH 8.5), and stir and polymerize at room temperature for 5 hours. Take out the nickel foam PDA-Ni with polydopamine on the surface, wash away the polydopamine physically adsorbed on the surface with ultrapure water, dry the PDA-Ni under an infrared lamp, and store it in a desiccator for later use.

[0029] 2) Put the PDA-Ni into the crucible and place it in the middle heating area of ​​the tube furnace, pass in argon gas with a purity ≥ 99% to remove oxygen, and after 30 minutes, raise the temperature to 800°C at a heating rate of 13°C / min, and keep for 1 h; then slowly lowered to room temperature, and a black product was formed at the bottom of the crucible——nitrogen-doped graph...

Embodiment 2

[0036] Compared with embodiment 1, the difference is only in:

[0037] Step 2 of this embodiment is: put the PDA-Ni into the crucible and place it in the middle heating area of ​​the tube furnace, pass in nitrogen with a purity of ≥99% to remove oxygen, and after 30 minutes, raise the temperature to 700°C, kept for 1 h; then slowly lowered to room temperature, and nitrogen-doped graphene-coated nickel foam material NG-Ni was formed at the bottom of the crucible.

[0038] The quality of nitrogen-doped graphene (NG) obtained in this embodiment is similar to that of embodiment 1.

Embodiment 3

[0040] Compared with embodiment 1, the difference is only in:

[0041] Step 2 of this embodiment is: put PDA-Ni into the crucible and place it in the middle heating area of ​​the tube furnace, pass in argon gas with a purity of ≥99% to remove oxygen, and after 30 minutes, heat up at a heating rate of 15°C / min Keep at 900°C for 1 h; then slowly lower to room temperature, and a nitrogen-doped graphene-coated nickel foam material NG-Ni is formed at the bottom of the crucible.

[0042] The quality of nitrogen-doped graphene (NG) obtained in this embodiment is similar to that of embodiment 1.

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Abstract

The invention relates to a method for preparing nitrogen-doped graphene. The method comprises the steps: (1) with foam nickel as a substrate, making dopamine monomers undergo a polymerization reaction on the surface of the substrate to form polydopamine, and thus obtaining PDA-Ni; (2) with the generated PDA-Ni as a solid precursor and the foam nickel as a catalyst and a template, carrying out high temperature annealing in closed inert gas, finally cooling to the room temperature in the closed inert gas, and thus obtaining a foam nickel block NG-Ni coated with the nitrogen-doped graphene product; and (3) etching away the foam nickel template by hydrochloric acid, and thus obtaining a three-dimensional porous nitrogen-doped graphene material without support. By controlling the annealing temperature, a nitrogen doping type can be regulated and controlled. The preparation method is simple and easy to implement, allows the reaction process to be easy to control, has no special requirements on equipment, is low in cost, and is easy to popularize and use.

Description

technical field [0001] The invention relates to a preparation method of nitrogen-doped graphene, in particular to a method of preparing nitrogen-doped graphene by using polydopamine as a solid carbon source and nitrogen source, using nickel foam as a catalyst and a template, and adopting high-temperature heating under the protection of an inert gas. The method of hybrid graphene is simple and easy, and belongs to the field of material synthesis chemistry. Background technique [0002] Graphene is a new two-dimensional carbon material with a honeycomb lattice structure formed by a single layer of carbon atoms tightly packed, and is the basic unit for constructing other dimensional carbon materials. Since the successful preparation of graphene in 2004, graphene has rapidly become one of the hot research materials in the fields of condensed matter physics, materials science, and chemistry. In order to expand the application range of graphene materials, people often adjust the ...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/184
Inventor 王凤彬夏兴华王炯
Owner 南京大学扬州化学化工研究院
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