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Preparation method of hollow carbon nanospheres

A nano-carbon sphere and hollow technology, applied in the direction of nanotechnology, can solve the problems of cumbersome process and poor controllability, and achieve the effect of less process steps, short reaction time and rounded spheres

Active Publication Date: 2016-12-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The key to this reaction is to ensure that the type and amount of reducing agent are properly selected. Secondly, the setting of reaction parameters is very critical. Therefore, this reaction not only involves the involvement of various surfactants and impurity ions, the process is cumbersome, and the controllability is poor. It is mainly to synthesize metal / metal oxide hollow spheres, but there are few reports on the preparation of hollow nanocarbon spheres by this method

Method used

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  • Preparation method of hollow carbon nanospheres
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  • Preparation method of hollow carbon nanospheres

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preparation example Construction

[0027] The preparation method of hollow nano carbon spheres of the present invention comprises the following steps:

[0028] s1. Provide nano-carbon sphere precursors with a particle size of 100-1000nm;

[0029] s2. Fully grind and disperse the carbon nanosphere precursor described in step s1 into a powder, then spread the powder in a crucible, and place the crucible in a muffle furnace for calcination to obtain the target product. The particle size of the target product is determined by the particle size of the precursor, which is 100-1000nm.

[0030] The calcination treatment conditions include: the calcination temperature is 300-800°C, the heating rate is above 2°C / min, the holding time is 0.2-12h, and the calcination atmosphere is air.

[0031] In the step s1, the preparation process of the nano-carbon sphere template includes: using glucose as a carbon source to perform a hydrothermal reaction to obtain nano-carbon spheres.

[0032] As one of the preferred specific appl...

Embodiment 1

[0037] s1. Take the nano-carbon sphere precursor with a particle size of 100-150nm and fully grind it with a mortar for more than 2 minutes, and disperse it into a powder;

[0038] s2. Spread the above-mentioned nano-carbon sphere powder on a crucible, place the crucible in a muffle furnace, and raise the temperature to 450° C. at a heating rate of 10° C. / min in an air atmosphere and keep it warm for 60 minutes to obtain hollow nano-carbons. ball.

[0039] figure 1 Shown is the transmission electron microscope photo of the hollow carbon nanospheres obtained in Example 1. It can be seen from the figure that the diameter of the hollow carbon nanospheres is 140 nm and the wall thickness is about 44 nm.

Embodiment 2

[0041] s1. Take the nano-carbon sphere precursor with a particle size of 100-150nm and fully grind it with a mortar for more than 2 minutes, and disperse it into a powder;

[0042] S2. Spread the above-mentioned nano-carbon sphere powder in a crucible, place the crucible in a muffle furnace, and in an air atmosphere, raise the temperature to 450 °C at a heating rate of 10 °C / min and keep it warm for 90 min to obtain hollow nano-carbon ball.

[0043] figure 2 Shown is the transmission electron microscope photo of the hollow carbon nanospheres obtained in Example 2. It can be seen from the figure that the diameter of the hollow carbon nanospheres is 132nm and the wall thickness is about 29nm.

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Abstract

The invention provides a preparation method of hollow carbon nanospheres. The method includes the steps that carbon nanosphere particles are provided as a precursor; the carbon nanosphere particles (CSs) with the same mass and different particle sizes are put into a muffle furnace to be roasted; residues generated after roasting are the target product. By means of the method, preparation of the hollow carbon nanospheres which have complete sphere bodies and are good in monodispersity and capable of being stably stored is achieved, wherein the particle size of the hollow carbon nanospheres is 100-1000 nm, and the wall thickness of the hollow carbon nanospheres is 10-500 nm and is uniform and controllable. No organic solvent or toxic reagent is added in the whole preparation process, no template is needed, and the preparation method is very simple in technology and high in controllability and repeatability; besides, precursor materials are wide in source and low in price, and thus the production cost is low; moreover, the preparation method is environmentally friendly and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of preparing nanospheres, in particular to a method for preparing hollow nanocarbon spheres. Background technique [0002] As a nanomaterial with high specific surface area and low density, hollow carbon nanospheres not only have good permeability, high chemical and thermal stability, adsorption characteristics, non-toxicity, biocompatibility, etc. The spherical structure makes hollow carbon nanospheres have great potential application value in many new technology fields such as gas storage, catalyst carrier, biocontrollable drug delivery, biocapsules, lightweight structural materials, micro-nano-containers, and supercapacitor electrode materials. At present, scholars have studied a variety of methods for preparing hollow carbon nanospheres. Among these methods, the template method is the most widely used, while the non-template method is less used. [0003] The template method is the most widely used method for prep...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y40/00
CPCC01P2004/04C01P2004/34C01P2004/62
Inventor 沈少华谭余波
Owner XI AN JIAOTONG UNIV
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