Preparation method of novel metal organic complex fibers and derivative porous carbon fibers thereof

A porous carbon fiber, metal-organic technology, applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, rayon manufacturing, etc., to achieve the effect of high yield, easy operation and high specific surface area

Active Publication Date: 2016-08-17
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods still have room for improvement, such as the need to simplify the preparation process, increase product yield, etc.

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  • Preparation method of novel metal organic complex fibers and derivative porous carbon fibers thereof
  • Preparation method of novel metal organic complex fibers and derivative porous carbon fibers thereof
  • Preparation method of novel metal organic complex fibers and derivative porous carbon fibers thereof

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preparation example Construction

[0036] The invention discloses a method for preparing a metal-organic complex fiber and a porous carbon fiber derived therefrom, comprising the following steps:

[0037] Step a) using zinc nitrate hexahydrate and / or cobalt nitrate hexahydrate as a precursor, and adding dimethylimidazole to methanol respectively, then mixing the two solutions rapidly, reacting under magnetic stirring, centrifuging and washing the obtained product, Obtain metal-organic complex nanoparticles;

[0038] Step b) Dispersing metal-organic complex nanoparticles into N,N-dimethylformamide solution, then adding polyacrylonitrile, magnetic stirring to dissolve polyacrylonitrile, and obtaining milky white or purple electrospinning solution for later use;

[0039] Step c) preparing the electrospinning solution into metal-organic complex / polyacrylonitrile electrospun fibers by electrospinning technology, collecting them through a copper mesh, and then peeling off to obtain a metal-organic complex / polyacrylon...

Embodiment 1

[0045] Dissolve 1.49g of zinc nitrate hexahydrate in 100mL of methanol, and dissolve 3.28g of dimethylimidazole in 100mL of methanol, then mix the two solutions, stir magnetically at 250rpm for 2h, and centrifuge the obtained product (10000rpm, 10min) and washing to obtain ZIF-8 nanoparticles.

[0046] Disperse ZIF-8 nanoparticles in 4mL of N,N-dimethylformamide, add 0.35g of polyacrylonitrile, and magnetically stir to dissolve. The obtained milky white solution is the electrospinning solution.

[0047] Transfer the electrospinning solution into a 10 mL syringe for electrospinning. The flow rate is set to 0.16mL / h, the voltage is 7.5KV, and the distance from the needle to the receiving screen is 12cm. The ZIF-8 nanoparticle / polyacrylonitrile electromimetic fiber can be obtained on the collection screen, and the ZIF-8 / polyacrylonitrile fiber film can be obtained after electrospinning for 1 hour.

[0048] The prepared ZIF-8 nanoparticles and electrospun fibers were observed by...

Embodiment 2

[0050] Dissolve 1.49g of zinc nitrate hexahydrate and 0.03g of cobalt nitrate hexahydrate in 100mL of methanol, and dissolve 3.28g of dimethylimidazole in 100mL of methanol, then mix the two solutions and stir magnetically at 250rpm for 2h, the obtained product Centrifuge (13000rpm, 10min) and wash to obtain bimetallic organic complex nanoparticles with a molar ratio of Zn:Co=100:2.

[0051] Disperse bimetallic organic complex nanoparticles in 4 mL of N,N-dimethylformamide, add 0.35 g of polyacrylonitrile, stir and dissolve with magnetic force, and the obtained purple solution is an electrospinning solution.

[0052] Transfer the electrospinning solution into a 10 mL syringe for electrospinning. The flow rate was set to 0.16mL / h, the voltage was 7.0KV, and the distance from the needle to the receiving screen was 12cm. Bimetallic organic complex nanoparticles / polyacrylonitrile electrospun fibers can be obtained on the collection screen, and bimetallic organic complex nanoparti...

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Abstract

The invention discloses a preparation method of novel metal organic complex fibers and derivative porous carbon fibers thereof. The method comprises the following steps: respectively adding certain amounts of a precursor (zinc nitrate hexahydrate / cobalt nitrate hexahydrate) and dimethylimidazole to a methanol solution, and magnetically stirring above materials to obtain metal organic complex nano-particles; dispersing the metal organic complex nano-particles in an N,N-dimethyl formamide solution, and adding polyacrylonitrile to obtain an electrospinning solution; carrying out an electrospinning technology to obtain metal organic complex / polyacrylonitrile electrospinned fibers, collecting the metal organic complex / polyacrylonitrile electrospinned fibers with a copper mesh, and peeling to obtain a metal organic complex / polyacrylonitrile film; and calcining the film to obtain porous carbon fibers. The preparation method has the advantages of simple operation and high yield; and the derivative porous carbon fibers have high specific surface area and good electrocatalytic activity, and have very great application prospect in the fields of energy storage and conversion.

Description

technical field [0001] The invention belongs to the technical field of functional nanometer materials, and more specifically relates to a preparation method of a metal-organic complex fiber and a porous carbon fiber derived therefrom. Background technique [0002] Metal-organic complexes are crystalline porous solids with a supramolecular structure, which are formed by the combination of metal ions and organic ligands through coordination bonds. Recently, carbon materials derived from metal-organic complexes have attracted great research interest, because of their extremely high specific surface area and controllable pore structure, they have great application prospects in energy conversion and storage (EnergyEnviron . Sci. 2014, 7, 2071.). Many studies have reported the potential conversion of various types of metal-organic complex materials and other carbon sources into amorphous microporous carbons via direct pyrolysis under an inert atmosphere without any activation pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F9/14D01F6/54D01F1/02
CPCD01F1/02D01F6/54D01F9/14D01F9/22
Inventor 张传玲俞书宏卢兵荣曹付虎
Owner HEFEI UNIV OF TECH
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