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Method for preparing hollow carbon nanospheres through non-template method and application of hollow carbon nanospheres

A hollow nano, non-template technology, applied in the field of materials, can solve the problems of long preparation cycle, adverse environmental impact, cumbersome steps, etc., and achieve the effect of short preparation cycle, good electrical conductivity, and simple preparation process

Active Publication Date: 2015-11-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the preparation method of hollow nanocarbon spheres adopts template method, such as hard template method and soft template method, but the steps of this method are cumbersome, the preparation cycle is long, and it will have an adverse impact on the environment.

Method used

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  • Method for preparing hollow carbon nanospheres through non-template method and application of hollow carbon nanospheres
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  • Method for preparing hollow carbon nanospheres through non-template method and application of hollow carbon nanospheres

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preparation example Construction

[0027] The preparation method of the hollow nano-carbon spheres of the present invention comprises the following steps: using polymer vesicles as a precursor, calcining under the protection of an inert gas to obtain the hollow nano-carbon spheres.

[0028] Among them, polymersomes are self-assembled by polymer P(PMDA‐alt‐ODA). The polymer P(PMDA‐alt‐ODA) is an alternating copolymer of 4,4'‐diaminodiphenyl ether (ODA) and 1,2,4,5‐pyromellitic dianhydride (PMDA), containing a large amount of The benzene ring has a molecular weight of 5,000 to 100,000.

[0029] The preparation method of polymersomes is as follows: polymer P(PMDA-alt-ODA) is dissolved in dimethylformamide (DMF) at a concentration of 1.0-10.0mg / mL, and added dropwise under vigorous stirring Deionized water, the polymersome solution was obtained after dialysis in deionized water, and the polymersome was obtained after freeze-drying. The particle size range of the polymer vesicle is 100-800nm. In this method, the ...

Embodiment 1

[0042] This embodiment provides a method for preparing hollow carbon nanospheres, comprising the following steps:

[0043] (1), the preparation steps of polymersomes:

[0044] Dissolve 50 mg of Polymer P (PMDA‐alt‐ODA) in dimethylformamide (DMF) at a concentration of 1.0 mg / mL, and add twice the amount of deionized DMF dropwise under vigorous stirring. Water, after dialysis in deionized water to obtain a polymersome solution, freeze the polymersome solution to a solid state in a refrigerator, and then lyophilize it in a freeze dryer to obtain a polymersome (powder form);

[0045] (2), the preparation steps of hollow carbon nanospheres:

[0046] Under the protection of nitrogen, the vesicular polymer (in powder form) obtained in step (1) is calcined at 650° C. to obtain hollow carbon nanospheres with uniform dispersion and uniform particle size.

[0047] Wherein, in step (1), the molecular weight of the polymer P(PMDA-alt-ODA) used is 5000, and the particle diameter of the ob...

Embodiment 2

[0050] This embodiment provides a method for preparing hollow carbon nanospheres, comprising the following steps:

[0051] (1), the preparation steps of polymersomes:

[0052] Dissolve 50 mg of Polymer P (PMDA‐alt‐ODA) in dimethylformamide (DMF) at a concentration of 3.0 mg / mL, and add twice the volume of DMF dropwise under vigorous stirring. Water, after dialysis in deionized water to obtain a polymersome solution, the polymersome solution was frozen in a refrigerator to a solid state, and then freeze-dried in a freeze dryer to obtain a polymersome (in powder form).

[0053] (2), the preparation steps of hollow carbon nanospheres:

[0054] Under the protection of nitrogen, the vesicular polymer (in powder form) obtained in step (1) was calcined at 750° C. to obtain hollow carbon nanospheres with uniform dispersion and uniform particle size.

[0055] Wherein, in step (1), the molecular weight of the polymer P(PMDA-alt-ODA) used is 10000, and the particle diameter of the obta...

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Abstract

The invention provides a method for preparing hollow carbon nanospheres through a non-template method and application of the hollow carbon nanospheres. The method includes the steps that with polymeric vesicles being precursors, calcination is performed under protection of inert gas, and the hollow carbon nanospheres are obtained; the polymeric vesicles are formed by polymers P (PMDA-alt-ODA) in a self-assembly mode. No templates are needed according to the preparing method, the preparing process is simple, the preparing period is short, and the method is environmentally friendly; the particle size of the prepared hollow carbon nanospheres is 110-820 nm; because the polymers P (PMDA-alt-ODA) contain a large number of benzene rings, the hollow carbon nanospheres are provided with graphite-like ordered structures, the carbonation rate reaches 50%, and the hollow carbon nanospheres have very good conductive capacity and electricity storage capacity and can be used as active electrode materials of conductive materials, electricity storage materials or supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a preparation method of hollow nano carbon spheres, hollow nano carbon spheres and applications thereof. Background technique [0002] As we all know, fossil energy sources such as coal, oil and natural gas are non-renewable energy sources, and their reserves are quite limited. With the rapid development of the economy, the consumption of energy is increasing year by year, and the consumption of fossil energy is also increasing accordingly. Due to the non-renewability of fossil energy, once it faces depletion, it will have a great impact on human development. In addition, what's worse is that during the use of fossil energy, harmful substances that will affect the environment will be produced, which is not conducive to the sustainable development of the environment. Therefore, it is urgent to find an alternative energy source. [0003] Among the many energy sources, although el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 杜建忠孙辉
Owner TONGJI UNIV
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