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Metal organic framework derived nitrogen-doped carbon nanosheet as well as preparation method and application thereof

A metal-organic framework, nitrogen-doped carbon technology, applied in the field of inorganic non-metallic materials and electrochemistry, can solve the problems of cathode electrochemical kinetic loss, slow oxygen reduction reaction, lower reaction energy barrier, etc., and achieve good scalability , the effect of simple operation and simple preparation method

Pending Publication Date: 2022-03-22
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the oxygen reduction reaction that restricts the development of zinc-air batteries is slow, and high-efficiency catalysts are needed to reduce the reaction energy barrier to reduce the electrochemical kinetic loss of the cathode.
At present, Pt-based noble metals are mostly used as electrocatalysts, but their reserves are small and expensive. Therefore, the development of cheap and efficient alternative catalysts can effectively promote the development of zinc-air batteries.

Method used

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  • Metal organic framework derived nitrogen-doped carbon nanosheet as well as preparation method and application thereof
  • Metal organic framework derived nitrogen-doped carbon nanosheet as well as preparation method and application thereof
  • Metal organic framework derived nitrogen-doped carbon nanosheet as well as preparation method and application thereof

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Effect test

Embodiment 1

[0039] (1), 30 ml of DMF poured into the beaker, add 30 mg of ammonia acetic acid, add 450 mg of nitrate, 300 mg of terephthalic acid added to DMF solution, continued 40 min, then transfer solution transfer Between 50 ml of the reactor;

[0040] (3), place the reactor containing a solution in an oven, and the heat reaction is carried out 90 ° C, 15 hours;

[0041] (4), the sample after the solvent was hot, and the light pink precipitate was obtained by centrifugation, and the precipitate was placed in an oven at 60 ° C, drying for 24 hours;

[0042] (5) After the dried light pink powder is dispersed, it is placed in the ceramic boat, and the porcelain boat is placed in the tube furnace. After 20 minutes of high purity nitrogen, the temperature is warmed to 1000 ° C, the temperature rise rate is 10 ° C. / min, heat insulation for 2 hours, naturally cooled to room temperature, to obtain a dark black nitrogen dopilateral; specific surface area is 600 cm -2 G -1 The average aperture s...

Embodiment 2

[0046](1), 40 ml of DMF was poured into the beaker, and 200 mg of ammonia acetic acid was added, adding 1000 mg of nitric nitrate and 1000 mg of an amino group added to DMF solution, continued 40 min, then the solution Transfer to 50 mL of the reactor;

[0047] (3), place the reactor containing a solution in an oven, and the solvent is thermally reacted 120 ° C, 6 hours;

[0048] (4), the sample after the solvent was hot, and the light pink precipitate was obtained by centrifugation, and the precipitate was placed in an oven at 60 ° C, drying for 24 hours;

[0049] (5) After the dried light pink powder is dispersed, it is placed in a ceramic boat, and the porcelain boat is placed in the tube furnace. After 20 minutes of high purity nitrogen, the temperature is increased to 800 ° C, the temperature rise rate is 5 ° C. / min, heat insulation 10 hours, naturally cooled to room temperature, to obtain a dark black nitrogen dopilateral; the specific surface area is 800 cm -2 G -1 The av...

Embodiment 3

[0053] (1) Pour 50 ml of DMF into the beaker, 500 mg of ammonia water, add 1500 mg of nitrate and 1500 mg of amino group terephthalic acid to add to the DMF solution, continued 40 min, then transfer the solution to the solution 50 ml of the reactor;

[0054] (3), place the reactor containing a solution in an oven, and the solvent is thermally reacted 150 ° C, 8 hours;

[0055] (4), the sample after the solvent was hot, and the light pink precipitate was obtained by centrifugation, and the precipitate was placed in an oven at 60 ° C, drying for 24 hours;

[0056] (5) After the dried light pink powder is dispersed, it is placed in a ceramic boat, and the porcelain boat is placed in the tube furnace. After 20 minutes of high purity nitrogen, the temperature is increased to 1000 ° C, the temperature rise rate is 2 ° C. / min, heat insulation for 4 hours, naturally cooled to room temperature, to obtain a dark black nitrogen doped nanoflake; specific surface area is 1500 cm -2 G -1 The ...

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Abstract

The invention belongs to the field of inorganic non-metallic materials and electrochemistry, and discloses a metal organic framework-derived nitrogen-doped carbon nanosheet as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) adding a zinc salt, a ligand and a surfactant into an organic solvent, stirring, putting into a reaction kettle, putting the reaction kettle into a drying oven at 90-200 DEG C, reacting, cooling, cleaning, and preserving heat at 60 DEG C for more than 24 hours to obtain a metal organic framework nanosheet; and (2) placing the dried metal organic framework nanosheet in a hearth, heating to 800-1500 DEG C at different heating rates, preserving heat for 1-10 hours, and naturally cooling to room temperature to obtain the nitrogen-doped nanosheet. The method is simple in preparation, easy to operate and low in cost, and the obtained nitrogen-doped carbon nanosheet has very high application value in the fields of supercapacitors and aqueous zinc-air batteries.

Description

Technical field [0001] The present invention belongs to the inorganic non-metallic material and electrochemical field, and in particular, the present invention relates to a metal organic frame derived nitrogen doped carbon nanoflake and its preparation method and application thereof. Background technique [0002] With the reduction in renewable energy in the world, people have become more and more improved for renewable energy research, development and utilization. Metal - air battery with O 2 For positive fuel, lithium, magnesium, aluminum, zinc, magnesium, and other metals, low cost, high environmentally friendly, and high safety performance, are generally considered to be the next generation of green new energy technology. Among them, zinc metal air batteries due to their higher energy density (1218 WH kg) -1 ), And zinc resources are rich, so the zinc air battery in manufacturing, operation and processing, etc., is obtained by researchers. However, the oxygen reduction reacti...

Claims

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Application Information

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IPC IPC(8): H01G11/36H01G11/32H01G11/86
CPCH01G11/36H01G11/32H01G11/86Y02E60/13
Inventor 原长洲张金洋公天宇梁龙伟侯林瑞
Owner UNIV OF JINAN
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