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Porous carbon-based nanofiber thin film material loaded by metal monatomic and metal derivative thereof as well as preparation method and application thereof

A technology of metal derivatives and nanofibers, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of high cost, slow cathode oxygen reduction reaction, low reserves, etc., and achieve utilization High, simple method, high specific surface area effect

Active Publication Date: 2021-10-22
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cathodic oxygen reduction reaction is kinetically very slow, and the current commercial noble metal catalysts face the disadvantages of low reserves and high cost. Therefore, it is imminent to develop high-performance and low-cost oxygen reduction catalysts.

Method used

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  • Porous carbon-based nanofiber thin film material loaded by metal monatomic and metal derivative thereof as well as preparation method and application thereof
  • Porous carbon-based nanofiber thin film material loaded by metal monatomic and metal derivative thereof as well as preparation method and application thereof
  • Porous carbon-based nanofiber thin film material loaded by metal monatomic and metal derivative thereof as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Metal salt Zn(NO 3 ) 2 Dissolve in methanol with 2-methylimidazole respectively, stir and mix at room temperature, wash the centrifuged product with methanol, and obtain white powder solid ZIF-8 after vacuum drying;

[0046] The obtained ZIF-8 was dissolved in N,N-dimethylformamide and stirred well at room temperature to form a white solution. The polymer polyacrylonitrile PAN is added to the above solution, fully stirred and mixed for more than 24 hours, and the spinning solution is prepared. By using electrospinning technology, ZIF-8 nanoparticles doped polymer fiber film PAN / ZIF-8 was obtained;

[0047] Put the fibrous membrane PAN / ZIF-8 in 0.1~1g L -1 Fe(NO 3 ) 3 In the methanol solution, soak for 1-5 hours and then vacuum-dry to obtain PAN / ZIF-8 / Fe adsorbed by metal ions, and then perform heat treatment at a heating rate of 2-10°C / min, and the speed of heating is ≥500°C, and keep for 1-5h , to obtain metal single atom-supported nitrogen-doped carbon nanofibe...

Embodiment 2

[0049] Metal salt Zn(NO 3 ) 2 Dissolve in methanol with 2-methylimidazole respectively, stir and mix at room temperature, wash the centrifuged product with methanol, and obtain white powder solid ZIF-8 after vacuum drying;

[0050] The obtained ZIF-8 was dissolved in N,N-dimethylformamide and stirred well at room temperature to form a white solution. The polymer polyacrylonitrile PAN is added to the above solution, fully stirred and mixed for more than 24 hours, and the spinning solution is prepared. By using electrospinning technology, ZIF-8 nanoparticles doped polymer fiber film PAN / ZIF-8 was obtained;

[0051] Place the fibrous membrane PAN / ZIF-8 in 0.5g L -1 Fe(NO 3 ) 3 in methanol solution, soaked for 3 hours and then vacuum-dried to obtain PAN / ZIF-8 / Fe adsorbed by metal ions, followed by heat treatment at a heating rate of 5°C / min, at a rate of 800°C, and kept for 3h to obtain metal single-atom-supported nitrogen Doped carbon nanofibers SA-Fe-N-C.

Embodiment 3

[0053] Metal salt Zn(NO 3 ) 2 Dissolve in methanol with 2-methylimidazole respectively, stir and mix at room temperature, wash the centrifuged product with methanol, and obtain white powder solid ZIF-8 after vacuum drying;

[0054] The obtained ZIF-8 was dissolved in N,N-dimethylformamide and stirred well at room temperature to form a white solution. The polymer polyacrylonitrile PAN is added to the above solution, fully stirred and mixed for more than 24 hours, and the spinning solution is prepared. By using electrospinning technology, ZIF-8 nanoparticles doped polymer fiber film PAN / ZIF-8 was obtained;

[0055] Put the fibrous membrane PAN / ZIF-8 in 1~3g L -1 Fe(NO 3 ) 3 in methanol solution, soaked for 3 hours and then vacuum-dried to obtain PAN / ZIF-8 / Fe adsorbed by metal ions, followed by heat treatment at a heating rate of 2-10°C / min, with a rate of heating ≥ 500°C, and keeping for 1-5h to obtain Nitrogen-doped carbon nanofibers NP-Fe supported by metal carbide nano...

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Abstract

The invention discloses a preparation method and application of a porous carbon-based nanofiber thin film material loaded by a metal single atom and a metal derivative thereof, and belongs to the technical field of preparation of functional nano materials. The preparation method comprises the following steps: fully mixing a metal organic framework precursor MOF with a polymer to prepare a spinning solution, obtaining an MOF nano-particle doped polymer fiber film by virtue of an electrostatic spinning technology, adsorbing metal ions on the surface and inside of the fiber by virtue of dipping, and further performing heat treatment in an inert atmosphere to obtain the metal / nitrogen-doped porous carbon-based hybrid nanofiber thin film material. The carbon-based thin film material prepared by the method has the physical characteristics of abundant active sites, high conductivity, sufficient ion transmission channels, good flexibility, excellent self-supporting structure and the like. The material has the advantages of high activity, high capacity and high stability in the application of electrochemical catalytic reaction and electric storage. The whole material is simple in preparation process, low in energy consumption, environment-friendly and suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to a large-scale preparation method of a porous carbon-based nanofiber film material supported by metal single atoms and metal derivatives that can be used as electrochemical catalysis and energy storage materials, and belongs to the technical field of preparation of functional nanomaterials. Background technique [0002] The excessive use of fossil energy has led to increasingly serious environmental pollution and energy depletion, so it is urgent to find a clean energy to replace the use of fossil energy. Fuel cells, metal-air batteries, metal-ion batteries, etc. are considered as ideal next-generation energy storage or conversion technologies. Metal-air batteries have attracted increasing attention due to their high energy density, low cost, environmental friendliness, and safety. However, the cathodic oxygen reduction reaction is kinetically very slow, and the current commercial noble metal catalysts face the disadvantages of...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/88H01M12/06B82Y40/00B82Y30/00
CPCH01M4/9041H01M4/9083H01M4/8828H01M4/8882H01M12/06B82Y30/00B82Y40/00
Inventor 芮琨王文青朱纪欣武凯利
Owner NANJING UNIV OF TECH
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