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A kind of ultrahigh specific surface area hollow carbon nanosphere and its preparation method and application

A technology of ultra-high specific surface area, carbon nanospheres, applied in the fields of nanomaterials technology and energy science, can solve the problems of hollow nanometer topography collapse and other problems, achieve large specific surface area and pore volume, uniform and stable size and shape, and good electrical conductivity sexual effect

Active Publication Date: 2016-11-09
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ultra-high specific surface area can be achieved by activation drilling, however harsh activation leads to collapse of hollow nanotopography

Method used

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  • A kind of ultrahigh specific surface area hollow carbon nanosphere and its preparation method and application
  • A kind of ultrahigh specific surface area hollow carbon nanosphere and its preparation method and application
  • A kind of ultrahigh specific surface area hollow carbon nanosphere and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Prepare a hollow carbon nanosphere with an ultra-high specific surface area according to the following steps:

[0035] (1) Dissolve 0.06g Triton X-100 in 60mL water at room temperature, then add 0.29mL pyrrole and 0.38mL aniline in turn, stir magnetically for 0.5h, and disperse ultrasonically for 0.5h; then place in an ice-water bath and stir for 30min; Add an aqueous solution of ammonium persulfate (obtained by dissolving 1.92g of ammonium persulfate in 5mL of water) pre-cooled to 0-5°C, and stir rapidly for 30 seconds with magnetic force; then put it in an ice-water bath for 12 hours, wash the product with water, and Filtrate under reduced pressure until the filtrate is close to neutral, and place the washed product in a vacuum oven at 50°C for 24 hours to obtain a hollow carbon nanosphere precursor;

[0036] (2) Place the hollow carbon nanosphere precursor obtained in step (1) under a nitrogen atmosphere with a flow rate of 400mL / min, raise the temperature to 900°C a...

Embodiment 2

[0041] Prepare a hollow carbon nanosphere with an ultra-high specific surface area according to the following steps:

[0042] (1) According to the step of step (1) in embodiment 1, hollow carbon nanosphere precursor is obtained;

[0043] (2) Place the hollow carbon nanosphere precursor obtained in step (1) under a nitrogen atmosphere at a flow rate of 400 mL / min, raise the temperature to 900 °C at a heating rate of 5 °C / min, carbonize at a constant temperature for 10 h, and cool down naturally to room temperature to obtain The ultra-high specific surface area hollow carbon nanosphere.

[0044] The prepared ultra-high specific surface area hollow carbon nanosphere has an outer diameter of 80 nm and a hollow cavity diameter of 19 nm. BET specific surface area is 2095m 2 / g, where the micropore surface area and the external pore surface area are respectively 1603m 2 / g and 492m 2 / g; the shell pore size distribution is 0.64 and 1.3nm; the total pore volume is 1.56cm 3 / g, wh...

Embodiment 3

[0046] Prepare a hollow carbon nanosphere with an ultra-high specific surface area according to the following steps:

[0047] (1) According to the step of step (1) in embodiment 1, hollow carbon nanosphere precursor is obtained;

[0048] (2) Place the hollow carbon nanosphere precursor obtained in step (1) under a nitrogen atmosphere at a flow rate of 800 mL / min, raise the temperature to 900 °C at a heating rate of 10 °C / min, carbonize at a constant temperature for 10 h, and cool down naturally to room temperature to obtain The ultra-high specific surface area hollow carbon nanosphere.

[0049] The BET specific surface area of ​​the prepared ultra-high specific surface area hollow carbon nanosphere is 2050m 2 / g, where the micropore surface area and external pore surface area are 889m 2 / g and 1161m 2 / g; the shell pore size distribution is 0.68nm, 1.3nm and 2.0nm; the total pore volume is 1.51cm 3 / g, where the micropore volume and external pore volume are 0.39cm 3 / g an...

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Abstract

The invention discloses ultrahigh-specific-area hollow carbon nano-spheres as well as a preparation method and application thereof. The preparation method comprises the following steps: performing polymerization at a micelle interface in the presence of a surfactant to prepare hollow polymer nano-spheres by taking aniline and pyrrole as comonomers and ammonium persulfate as an initiator; and then performing carbonization in an inert atmosphere to obtain ultrahigh-specific-area monodispersity hollow carbon nano-spheres. According to the ultrahigh-specific-area hollow carbon nano-spheres disclosed by the invention, a complex process of a template method is avoided, and the method is simple, is less in operation step, and breaks through the bottleneck that the present hollow carbon spheres are low in specific area and large in size. The specific area of the hollow carbon nano-spheres prepared by the method disclosed by the invention reaches up to 3022m<2> / g, the size reaches 69nm, and the size and the shape are uniform and stable, so that the hollow carbon nano-spheres can be used as a high-performance adsorption material, a high-energy and high-power-density super capacitor electrode material, and a limited sulfur nano carbon carrier electrode material of a lithium sulfur battery.

Description

technical field [0001] The invention belongs to the fields of nanomaterial technology and energy science, and specifically relates to a hollow carbon nanosphere with an ultrahigh specific surface area, a preparation method and application thereof. Background technique [0002] As an important spherical nanomaterial, hollow carbon nanospheres not only maintain the characteristics of large specific surface area, low density, high strength and good chemical stability of nanoporous carbon materials, but also have a unique carbon shell structure and its surrounding structure. The spherical nano-hollow cavity has received extensive attention in many fields and is expected to be used in nano-reactors, adsorption separation, catalyst supports, energy storage materials and other fields. Therefore, the controllable preparation of hollow carbon nanospheres has become one of the frontiers in the research field of porous carbon materials. These applications often require hollow carbon n...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y30/00B82Y40/00
Inventor 吴丁财徐飞黄思琦符若文唐志伟
Owner SUN YAT SEN UNIV
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