Single-layer and multi-layer hollow carbon nanospheres, and preparation and application thereof

A hollow carbon sphere, single-layer technology, applied in the fields of nanotechnology, nanotechnology, hybrid/electric double-layer capacitor manufacturing, etc., can solve the problems of cumbersome steps in the template method, and achieve the effect of mild reaction conditions and simple operation methods.

Active Publication Date: 2015-09-09
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the steps of the template method are cumbersome, including steps such as the combination of the template and the carbon matrix and the removal of the template.

Method used

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  • Single-layer and multi-layer hollow carbon nanospheres, and preparation and application thereof
  • Single-layer and multi-layer hollow carbon nanospheres, and preparation and application thereof
  • Single-layer and multi-layer hollow carbon nanospheres, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1

[0094] Embodiment A1, using method A to prepare hollow carbon spheres:

[0095] 1) Weigh 0.1g 3-aminophenol (0.92mmol) and dissolve it in 30ml H 2 O to obtain a 3-aminophenol aqueous solution with a mass concentration of 3.3 mg / ml. Then add 0.1ml mass percent concentration of 25% ammonia (1.30mmol) and 0.1ml mass concentration of 37% formaldehyde solution (1.34mmol), stir at room temperature for 1.5h, this time 3-aminophenol formaldehyde can be obtained Solid spheres of resin polymers, such as figure 2 shown. Add 20ml of acetone to the reaction vessel, continue stirring at room temperature for 30min, centrifuge the precipitate, and wash it twice with ethanol, and place the obtained precipitate in a drying oven at 80°C for 4 hours to obtain a single layer of 3-aminophenol formaldehyde resin. Hollow spheres of ester polymers, i.e. intermediate I, such as image 3 shown;

[0096] 2) The dried intermediate product I was placed in a tube furnace with a hydrogen-argon gas mixt...

Embodiment A2

[0098] Embodiment A2, using method A to prepare hollow carbon spheres:

[0099] The difference with embodiment A1 is:

[0100] Weigh 0.12g resorcinol (1.09mmol) and dissolve in 20ml H 2 O, to obtain a mass concentration of resorcinol aqueous solution of 6mg / ml.

[0101] Finally, a single-layer hollow carbon sphere with a clean interior is obtained. The outer diameter of the obtained carbon sphere is 160-200nm, the inner diameter is 100-120nm, and the wall thickness is 30-50nm.

Embodiment A3

[0102] Embodiment A3, using method A to prepare the yolk-shell hollow structure with solid carbon spheres inside:

[0103] The difference with embodiment A1 is:

[0104] Weigh 0.6g 3-aminophenol (5.52mmol) in 40ml H 2 O, then sequentially added 0.2ml mass percent concentration of 25% ammonia (2.60mmol) and 0.6ml mass concentration of 37% formaldehyde solution (8.04mmol).

[0105] The end result is a hollow yolk-shell structure with solid carbon spheres inside. The outer diameter of the obtained hollow carbon sphere structure is 270-360nm, and the diameter of the inner solid sphere is 180-250nm.

[0106] Figure 5 It is the transmission electron microscope (TEM) figure of the hollow yolk-shell carbon sphere material that the interior prepared by the present embodiment is equipped with solid carbon spheres, as can be seen from the figure that the diameter of the internal solid carbon sphere is about 230nm, and the diameter of the external cavity is about 350nm .

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Abstract

The invention discloses a preparation method for hollow carbon nanospheres, comprising: 1) placing a phenol in water, adjusting the pH value, adding an aldehyde, and stirring the solution at a certain temperature for a period of time; 2) adding an etchant to the reaction system and performing stirring at a certain temperature to obtain an intermediate product through selective removal of parts with low polymeric properties in the polymer by using the solubility difference between internal substances for different solvents; 3) calcining, in an inert or a reducing atmosphere, the intermediate product obtained in Step 2), and cooling the substance, thereby completing preparation of the hollow carbon nanospheres. In addition, by using the property that the phenolic resin is capable of in-situ polymerization on different nanoparticle surface, on one hand, a multi-layer hollow structure can be made through multiple times of coating and layer-by-layer corrosion; and on the other hand, different nanoparticles can be in-situ packaged in a cavity, thereby making a core-shell or yolk-core structure.

Description

technical field [0001] The invention relates to the synthesis field of polymer materials and inorganic nano materials, in particular to a method for preparing single-layer and multi-layer hollow carbon sphere nano materials by using phenolic resin and corrosive agent. Background technique [0002] Hollow carbon sphere is a carbon material with special structure, which has high specific surface area, high porosity, excellent electrical conductivity, chemical stability and thermal stability, etc. The field has important application value. Due to its unique cavity structure, it can be used as a nanocage to accommodate different kinds of substances, so it can also be used in electrode materials, catalyst carriers, gas storage media, lubricants, substance adsorption and separation, drug sensors, drug release control, artificial cells, etc. , has a wide range of applications and has received a lot of attention. [0003] At present, there are various methods for preparing hollow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/00C01B31/02B82Y30/00H01G11/86
CPCY02E60/13
Inventor 曹安民池子翔万立骏
Owner INST OF CHEM CHINESE ACAD OF SCI
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