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Preparation method of porous carbon nano rod with high specific area

A high specific surface area, porous carbon technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of cumbersome steps, small specific surface area and high cost of carbon nanorods, and achieve low cost , High specific surface area, mild condition effect

Inactive Publication Date: 2014-12-17
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current preparation methods of carbon nanorods have disadvantages such as cumbersome steps, high cost, low purity, and small specific surface area.

Method used

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  • Preparation method of porous carbon nano rod with high specific area
  • Preparation method of porous carbon nano rod with high specific area
  • Preparation method of porous carbon nano rod with high specific area

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0032] This embodiment provides a method for preparing porous carbon nanorods with high specific surface area, which includes the following steps:

[0033] Weigh 2.6g of zinc acetate dihydrate (10mmol) and 2.5g of trimesic acid (12mmol), dissolve them in 100mL of DMF, stir at room temperature for 0.5h, and then carry out solvothermal treatment at 140°C for 2 days to obtain The solid was washed slowly with DMF, then with approximately 75 mL of CHCl 3 Exchange for 24 hours, repeat three times, and finally vacuum dry at 80°C for 5 hours to obtain a white powder, that is, a zinc trimesate metal-organic framework, and its XRD pattern is as follows: figure 1 shown;

[0034] Put the white powder in a nitrogen atmosphere, raise the temperature to 950°C at a rate of 5°C / min, and then keep it at this temperature for 2 hours to obtain carbon nanorods, and its XRD pattern is as follows figure 2 As shown, its BET specific surface area is 6510m 2 / g, langmuir specific surface area is 91...

Embodiment 2

[0036] This embodiment provides a method for preparing porous carbon nanorods with high specific surface area, which includes the following steps:

[0037] Weigh 10mmol of zinc nitrate tetrahydrate and 12mmol of trimesic acid, dissolve them in 100mL of DEF, stir at room temperature for 0.5h, then perform solvent heat treatment at 140°C for 1 day, wash the obtained solid with DEF slowly, and then With approximately 55 mL of CHCl 3 Exchange for 24 hours, repeat three times, and finally vacuum dry at 80°C for 3 hours to obtain a white powder;

[0038] The white powder was placed in a nitrogen atmosphere, the temperature was raised to 910° C. at a rate of 2° C. / min, and then kept at this temperature for 4 hours to obtain carbon nanorods.

Embodiment 3

[0040] This embodiment provides a method for preparing porous carbon nanorods with high specific surface area, which includes the following steps:

[0041] Weigh 100mmol of zinc chloride and 10mmol of trimesic acid, dissolve them in 200mL of DMAC, stir at room temperature for 0.5h, then perform solvent heat treatment at 100°C for 2 days, and slowly wash the obtained solid with 100-200mL of DMAC , then with approximately 100 mL of CHCl 3 Exchange for 12 hours, repeat three times, and finally vacuum dry at 80°C for 8 hours to obtain a white powder;

[0042] The white powder was placed in a nitrogen atmosphere, the temperature was raised to 980° C. at a rate of 15° C. / min, and then kept at this temperature for 2 hours to obtain carbon nanorods.

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Abstract

The invention provides a preparation method of a porous carbon nano rod with a high specific area. The preparation method comprises the following steps (1) weighing zinc salts and trimesic acid according to a ratio of amount of substance of 0.5-5:1, dissolving the zinc salts and trimesic acid in an organic solvent, fiercely stirring for 0.5-3 hours at a room temperature, then carrying out a solvent heat treatment for 1 to 4 days at a temperature of 80 to 160 DEG C, filtering, washing, carrying out solvent exchange, and drying the obtained solid in vacuum to obtain white powder, wherein the ratio of amount of substance of the organic solvent to zinc salts is 20-200:1; (2) rapidly heating the white powder obtained in the step (1) to a temperature of 910 DEG C or more at a speed of 2-20 DEG C / min in a nitrogen gas atmosphere, maintaining the temperature for 1 to 12 hours, cooling to the room temperature so as to obtain the porous carbon nano rod with a high specific surface area. The provided preparation method has the advantages of economic route, low cost, simple operation, and mild conditions. The target product has a high specific area and narrow pore size distribution, and has an amorphous carbon structure and a graphite carbon structure at the same time.

Description

technical field [0001] The invention relates to a method for preparing a porous carbon nanorod with a high specific surface area, and belongs to the technical field of carbon nanomaterial preparation. Background technique [0002] Porous carbon nanomaterials have good chemical stability, (water) thermal stability, and high specific surface area, and are widely used in many fields such as adsorption, separation, catalyst support, and electrochemistry. Among various carbon nanomaterials, carbon nanorods have great potential application value in battery anode materials due to their excellent electrochemical properties. However, the specific surface area of ​​carbon nanorods is usually small, and there is no mature and easy preparation method suitable for large-scale production, which seriously restricts the further application of carbon nanorods. Therefore, it is particularly important to research and develop the preparation method of carbon nanorods with high specific surface...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y40/00B82Y30/00
Inventor 杨英张鑫
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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