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Preparation method for one-dimensional tubular MOF material, and preparation and application of one-dimensional nitrogen-doped porous carbon nanotube material

A technology of MOF and nanotubes, which is applied in the direction of carbon nanotubes, nanocarbons, electrical components, etc., can solve the problems of low specific capacity and restrict the development of lithium-ion batteries, and achieve high porosity, high yield, and less variety requirements. Effect

Active Publication Date: 2019-11-08
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional commercial graphite anode, due to the low specific capacity (372mAh / g), restricts the development of lithium-ion batteries

Method used

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  • Preparation method for one-dimensional tubular MOF material, and preparation and application of one-dimensional nitrogen-doped porous carbon nanotube material
  • Preparation method for one-dimensional tubular MOF material, and preparation and application of one-dimensional nitrogen-doped porous carbon nanotube material
  • Preparation method for one-dimensional tubular MOF material, and preparation and application of one-dimensional nitrogen-doped porous carbon nanotube material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1. Preparation of ZnCo-BTC nanowire powder.

[0033] (1) 0.42g of 1,3,5-trimesic acid was dissolved in 90ml of deionized water to form solution I, 0.25g of cobalt acetate tetrahydrate and 0.22g of zinc acetate dihydrate were dissolved in 10ml of deionized water to form solution II, When solution I is preheated to 100°C in an oil bath, add solution B, stir and react at a constant temperature for 1 min, centrifuge the product, wash it with ethanol, and dry it in an oven at 80°C to obtain ZnCo-BTC nanowire powder .

[0034] figure 1 For the ZnCo-BTC nanowire material prepared in this example, it can be seen that the unconverted MOFs materials are all one-dimensional nanomaterials, and the surface is relatively smooth.

Embodiment 2

[0035] Example 2. Preparation of one-dimensional tubular MOF materials by ZnCo-BTC nanowires

[0036] (1) 20mg ZnCo-BTC nanowire powder is dispersed in 30ml ethanol aqueous solution (V 醇 :V 水 =9:1), forming a uniform suspension A, 4g of 2-methylimidazole was dissolved in 10ml of aqueous ethanol (V 醇 :V 水 =9:1), forming solution B, preheating B in a water bath to 45°C, adding A, stirring at constant temperature for 15 minutes.

[0037] (2) Centrifuge the product, wash it with ethanol three times, and then wash it twice with deionized water, and dry it in an oven at 80°C to obtain a one-dimensional tubular MOF material powder.

[0038] figure 2 FESEM image and TEM image of the one-dimensional tubular MOF material powder prepared for this example. The FESEM image shows that the originally smooth nanowire surface becomes rough, and the TEM image shows a tubular structure. Figure 4 In the XRD pattern of the one-dimensional tubular MOF material prepared for this example, it ...

Embodiment 3

[0039] Example 3. Preparation of nitrogen-doped porous carbon material from one-dimensional tubular MOF material

[0040] (1) The one-dimensional tubular MOF material prepared by ZnCo-BTC was annealed at 900 ° C under argon protection, and kept for 2 hours; the one-dimensional tubular nitrogen-doped porous carbon material was obtained.

[0041] (2) The one-dimensional tubular nitrogen-doped porous carbon material was placed in a nitric acid solution (concentrated nitric acid: water = 1:2), and stirred and reacted in a water bath at 80° C. for 24 hours.

[0042] (3) Centrifuge the product, wash it with ethanol, and dry it in an oven at 80° C. to obtain a one-dimensional nitrogen-doped porous carbon nanotube material.

[0043] image 3 It is the FESEM image and TEM image of the one-dimensional tubular nitrogen-doped porous carbon material prepared in this example, indicating that after annealing and pickling steps, the morphology of the one-dimensional tubular MOF material can ...

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Abstract

The invention discloses a preparation method for a one-dimensional tubular MOF material. The preparation method comprises the following steps of: dispersing ZnCo-BTC nanowires in an aqueous ethanol solution to form a uniform suspension A; dissolving 2-methylimidazole in another aqueous ethanol solution to form a solution B; heating the solution B in a water bath kettle to a reaction temperature, pouring the suspension A, carrying out a reaction under stirring at a constant temperature, and subjecting a product to centrifugation; and then washing the product with ethanol and deionized water insequence, and finally carrying out drying to obtain the one-dimensional tubular MOF material. The one-dimensional tubular MOF material is annealed in argon and then pickled to obtain a one-dimensionalnitrogen-doped porous carbon nanotube material. The preparation method of the invention has the advantages of simple operation, low cost and easily controllable process; and the prepared product canbe applied not only to electrochemical lithium ion storage, but also to other fields such as separation, catalysis, sustained drug release and energy.

Description

technical field [0001] The invention belongs to the technical field of synthesis of functional nanomaterials, in particular to a preparation method of a one-dimensional tubular MOF material and the preparation and application of a one-dimensional nitrogen-doped porous carbon nanotube material. Background technique [0002] In recent years, lithium-ion batteries (LIBs) have been successfully commercialized due to their high energy density and long cycle life. However, the traditional commercial graphite anode has restricted the development of lithium-ion batteries due to its low specific capacity (372mAh / g). Therefore, it is of great significance to develop carbon-based anode materials with high reversible capacity, excellent rate capability and cycle stability. Hollow nanostructured materials can not only shorten the Li + transport path, and can also provide a large electrode / electrolyte interface for charge transfer reactions. At the same time, the doping of heterogeneou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C01B32/16H01M4/583
CPCC08G83/008C01B32/16H01M4/583Y02E60/10
Inventor 余东波邵齐宋清镜张永利崔接武吴玉程
Owner HEFEI UNIV OF TECH
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