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Nitrogen-doped carbon nano SnO2 composite material and preparation method and application thereof

A composite material, nitrogen-doped carbon technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as complex preparation methods, achieve simple preparation methods, wide application prospects, repeatable good effect

Active Publication Date: 2020-11-03
EAST CHINA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, these existing oxygen-vacancy nano-SnO 2 The performance of nitrogen-doped carbon nanofiber composites still cannot effectively meet the existing needs, and the preparation method is complicated
Therefore, how to quickly and efficiently prepare SnO 2 Nitrogen-doped carbon nano-SnO with uniform size and uniform dispersion 2 Composite materials, effective use of nano SnO 2 The synergy between N-doped carbon matrix and nitrogen-doped carbon matrix to improve its application performance still faces great challenges

Method used

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  • Nitrogen-doped carbon nano SnO2 composite material and preparation method and application thereof
  • Nitrogen-doped carbon nano SnO2 composite material and preparation method and application thereof
  • Nitrogen-doped carbon nano SnO2 composite material and preparation method and application thereof

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Embodiment 1

[0053] (1) Preparation of poly-4-vinylpyridine / absolute ethanol solution: at room temperature, get 5.25g poly-4-vinylpyridine (weight average molecular weight 60000) and join in 50mL of absolute ethanol, and magnetic stirring makes it dissolve, obtains 4 -Poly(4-vinylpyridine) / absolute ethanol solution with a vinylpyridine monomer concentration of 1 mol / L.

[0054] (2) Preparation of SnCl 2 2H 2 O / absolute ethanol solution: take 11.28g SnCl 2 2H 2 O was added to 50 mL of absolute ethanol, and magnetically stirred to dissolve it to obtain SnCl with a concentration of 1 mol / L 2 2H 2 O / absolute ethanol solution.

[0055] (3) Preparation of carbonized precursor: under the condition of magnetic stirring at room temperature, the SnCl 2 2H 2 O / dehydrated ethanol solution is added in poly-4-vinylpyridine / dehydrated ethanol solution, molar ratio (Sn 2+ : 4-vinylpyridine monomer = 1:1); continue to stir for 12 hours to form a stable complex precipitate, and then evaporate and ...

Embodiment 2

[0058] (1) Preparation of poly-4-vinylpyridine / absolute ethanol solution: at room temperature, get 5.25g poly-4-vinylpyridine (weight average molecular weight 60000) and join in 50mL of absolute ethanol, and magnetic stirring makes it dissolve, obtains 4 -Poly(4-vinylpyridine) / absolute ethanol solution with a vinylpyridine monomer concentration of 1 mol / L.

[0059] (2) Preparation of SnCl 2 2H 2 O / absolute ethanol solution: take 2.82g SnCl 2 2H 2 O was added to 50 mL of absolute ethanol, and magnetically stirred to dissolve it to obtain SnCl with a concentration of 0.25 mol / L 2 2H 2 O / absolute ethanol solution.

[0060] (3) Preparation of carbonized precursor: under the condition of magnetic stirring at room temperature, the SnCl 2 2H 2 O / dehydrated ethanol solution is added in poly-4-vinylpyridine / dehydrated ethanol solution, molar ratio (Sn 2+ : 4-vinylpyridine monomer = 1:4); continue to stir for 12 hours to form a stable complex precipitate, and then evaporate an...

Embodiment 3

[0063] (1) Preparation of 4-vinylpyridine monomer / absolute ethanol solution: at room temperature, take 5.25g of 4-vinylpyridine monomer and add it to 50mL of absolute ethanol, and stir it magnetically to dissolve it to obtain 4-vinylpyridine monomer 4-vinylpyridine monomer / absolute ethanol solution with a concentration of 1mol / L.

[0064] (2) Preparation of SnCl 2 2H 2 O / absolute ethanol solution: take 11.28g SnCl 2 2H 2 O was added to 50 mL of absolute ethanol, and magnetically stirred to dissolve it to obtain SnCl with a concentration of 1 mol / L 2 2H 2 O / absolute ethanol solution.

[0065] (3) Preparation of carbonized precursor: under the condition of magnetic stirring at room temperature, the SnCl 2 2H 2 O / dehydrated ethanol solution is added in 4-vinylpyridine monomer / dehydrated ethanol solution, molar ratio (Sn 2+ : 4-vinylpyridine monomer = 1:1); continue to stir for 12 hours to form a stable complex precipitate, and then evaporate and dry to obtain the carbon...

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Abstract

The invention discloses a nitrogen-doped carbon nano SnO2 composite material and a preparation method and application thereof. The preparation method of the nitrogen-doped carbon nano SnO2 composite material comprises the following steps: (1) mixing a Sn2+ containing solution and a poly 4-vinylpyridine solution, performing stirring to form a complex precipitate, and removing a solvent from the complex precipitate to obtain a carbonized precursor, wherein in the poly 4-vinylpyridine solution, a solvent is ethanol and / or water; (2) carbonizing the carbide precursor to obtain the nitrogen-doped carbon nano SnO2 composite material. According to the nitrogen-doped carbon nano SnO2 composite material disclosed by the invention, the nitrogen-doped carbon nano SnO2 composite material with uniformSnO2 particle size, uniform dispersion and excellent electrochemical performance can be prepared only through one-step tin carbide nitrogen coordination of the precursor.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a nitrogen-doped carbon nanometer SnO 2 Composite materials and their preparation methods and applications. Background technique [0002] SnO 2 Due to the advantages of low material cost, simple preparation method, non-toxic and non-polluting, easy control of morphology and microstructure, high specific capacity, high thermal and chemical stability, nanomaterials have great potential in the fields of energy storage, sensing, and catalysis. Wide range of applications. But SnO 2 The characteristic of low conductivity itself seriously restricts the improvement of its application performance, and the nanoscale SnO 2 Due to the high surface energy, it is easy to agglomerate so that its activity decreases rapidly during the application process. To solve the above problems is to improve the SnO 2 The key to the application performance of nanomaterials. [0003] Nano...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M4/62B82Y30/00
CPCH01M4/362H01M4/483H01M4/625B82Y30/00H01M2004/027Y02E60/10
Inventor 江浩李春忠胡彦杰刘英胡晨
Owner EAST CHINA UNIV OF SCI & TECH
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