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Method for preparing nitrogen-functionalized hollow mesoporous carbon nanosphere

A technology of carbon nanospheres and empty mesopores, applied in the direction of nanocarbon, nanotechnology, nanotechnology, etc., can solve the problems of low specific surface area of ​​materials, limited practical application, cumbersome preparation methods, etc., and achieve high specific surface area, electrochemical The effect of excellent performance and low price

Inactive Publication Date: 2017-08-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method is cumbersome and time-consuming, and the specific surface area of ​​the obtained material is not high, which limits its practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Ammonia water, water, ethanol, resorcinol, formaldehyde solution and tetrapropoxysilane are taken in parts by mass of 1:3.7:20.5:0.059:0.22:0.50. First mix ammonia water, water, ethanol and tetrapropoxysilane, stir, react at 30°C for 15 minutes, add resorcinol, then add formaldehyde solution dropwise, continue stirring for 24 hours, then hydrothermally treat the reactant solution at 100°C 24h, get SiO 2 Nanoparticles of polymer nanospheres. In a tube furnace, under the protection of inert gas, the obtained polymer nanospheres were heated to 600 °C for carbonization at a heating rate of 1 °C / min, and finally the temperature was naturally cooled to room temperature, and SiO was removed with 3 mol / L NaOH solution. 2 template, to obtain hollow mesoporous carbon nanospheres. Mix hollow mesoporous carbon nanospheres and ionic liquid 1-ethyl-3-methylimidazolium dicyanamide at a mass ratio of 1:0.5, place in a tube furnace, protect with inert gas, and heat up at a rate of 3°C...

Embodiment 2

[0020] Ammonia, water, ethanol, resorcinol, formaldehyde solution and tetrapropoxysilane were taken in the quantity of 1:3.7:20.5:0.059:0.44:1.5 parts by mass. First mix ammonia water, water, ethanol and tetrapropoxysilane, stir, react at 30°C for 15 minutes, add resorcinol, then add formaldehyde solution dropwise, continue stirring for 24 hours, then hydrothermally treat the reactant solution at 100°C 24h, get SiO 2 Nanoparticles of polymer nanospheres. In a tube furnace, under the protection of inert gas, the obtained polymer nanospheres were heated to 700 °C for carbonization at a heating rate of 3 °C / min, and finally the temperature was naturally cooled to room temperature, and SiO was removed with 3 mol / L NaOH solution. 2 template, to obtain hollow mesoporous carbon nanospheres. Mix hollow mesoporous carbon nanospheres and ionic liquid 1-ethyl-3-methylimidazolium dicyanamide at a mass ratio of 1:1, place in a tube furnace, protect with inert gas, and heat up at 1°C / min ...

Embodiment 3

[0022] Ammonia water, water, ethanol, resorcinol, formaldehyde solution and tetrapropoxysilane were taken in the quantity of 1:3.7:20.5:0.059:0.66:1.0 parts by mass. First mix ammonia water, water, ethanol and tetrapropoxysilane, stir, react at 30°C for 15 minutes, add resorcinol, then add formaldehyde solution dropwise, continue stirring for 24 hours, then hydrothermally treat the reactant solution at 100°C 24h, get SiO 2 Nanoparticles of polymer nanospheres. In a tube furnace, under the protection of inert gas, the obtained polymer nanospheres were heated to 700 °C for carbonization at a heating rate of 10 °C / min, and finally the temperature was naturally cooled to room temperature, and SiO was removed with 3 mol / L NaOH solution. 2 template, to obtain hollow mesoporous carbon nanospheres. Mix hollow mesoporous carbon nanospheres and ionic liquid 1-ethyl-3-methylimidazolium dicyanamide at a mass ratio of 1:3, place in a tube furnace, protect with inert gas, and heat up at a...

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Abstract

The invention relates to a method for preparing nitrogen-functionalized hollow mesoporous carbon nanosphere. Ammonia water, water, ethyl alcohol, resorcinol, a formaldehyde solution and tetrapropoxysilane are taken according to a mass fraction quantity of 1: 3.7: 20.5: 0.059: 0.22 to 0.66: 0.50 to 1.5; the ammonia water, the water, the ethyl alcohol, and the tetrapropoxysilane are fixed and stirring is carried out, reaction is carried out for 15 minutes at a temperature of 30 DEG C, the resorcinol and the formaldehyde solution are added and stirring is carried out continuously for 24h, hydro-thermal treatment is carried out for 24 hours at a temperature of 100 DEG C, so that a polymer nanosphere including SiO2 nano particles is obtained; the polymer nanosphere is processed by carbonization at a temperature of 600 to 900 DEG C, a SiO2 template is removed by using a NaOH solution to obtain a hollow mesoporous carbon nanosphere; ionic liquid 1-ethyl-3methylimidazolium dicyanamide and the hollow mesoporous carbon nanosphere are fixed and then carbonization is carried out again at a temperature of 700 DEG C, so that a nitrogen-functionalized hollow mesoporous carbon nanosphere is prepared. According to the method provided by the invention, the prepared nitrogen-functionalized hollow mesoporous carbon nanosphere has advantages of having high specific surface area, nitrogen functional group, hollow structure, mesoporous channel and spherical geometrical morphology; and when the nitrogen-functionalized hollow mesoporous carbon nanosphere is used as a super capacitor electrode, the excellent electrochemical performance is realized.

Description

technical field [0001] The invention relates to a preparation method of nitrogen-functionalized hollow mesoporous carbon nanospheres, belonging to the technical field of material preparation technology. Background technique [0002] As a new type of energy storage device, supercapacitor has the characteristics of short charging time, long cycle life and environmental protection. It has important application prospects in many fields such as electric vehicles, uninterruptible power supplies, aerospace, and national defense. Electrode materials are one of the key factors affecting the main performance of supercapacitors, therefore, it is very important to prepare electrode materials with excellent properties. Mesoporous carbon spheres have the advantages of regular shape, high specific surface area, good electrical conductivity, stable chemical properties, and large mesoporous pore size, which is conducive to the rapid migration of electrolyte ions. They are very suitable for ...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/36H01G11/30H01G11/44C01B32/15B82Y30/00B82Y40/00
CPCY02E60/13H01G11/24B82Y30/00B82Y40/00C01P2004/34C01P2004/51C01P2004/62C01P2004/80C01P2006/12C01P2006/17C01P2006/40C01P2006/80H01G11/30H01G11/36H01G11/44
Inventor 甘礼华牛莎刘明贤
Owner TONGJI UNIV
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