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A kind of nitrogen-doped hollow carbon/graphite sphere nanometer material and preparation method thereof

A technology of hollow carbon spheres and nanomaterials, applied in the preparation/purification of carbon, nano-carbon, graphene, etc., can solve the problem of non-recyclable and reusable hard template agents, little attention to the thickness of hollow spherical shells, and increased template preparation In order to avoid problems such as the cost of the method, the product structure is uniform and controllable, the application prospect is good, and the effect of industrialization is easy.

Active Publication Date: 2020-03-24
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In short, hollow spheres with good repeatability can be obtained with hard templates, but since the hard templates currently used are mainly silica or polymer spheres, the maximum heating temperature does not exceed 850 degrees, and hollow graphite spheres cannot be obtained.
At the same time, the hard template agent cannot be recycled and reused, which increases the cost of the template preparation method to a certain extent.
In addition, many people only care about the formation of hollow spheres, and seldom pay attention to the thickness of hollow spherical shells.

Method used

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  • A kind of nitrogen-doped hollow carbon/graphite sphere nanometer material and preparation method thereof
  • A kind of nitrogen-doped hollow carbon/graphite sphere nanometer material and preparation method thereof
  • A kind of nitrogen-doped hollow carbon/graphite sphere nanometer material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A method for preparing nitrogen-doped hollow carbon / graphite sphere nanomaterials, specifically comprising the steps of:

[0043](1), measure 50ml 0.4M / L copper chloride dihydrate solution, then 100ml 1M / L sodium hydroxide solution, in the presence of surfactant, stir at room temperature at high speed to make mixed emulsification liquid. Then, add 60ml of 0.5M / L glucose solution, continue to stir for 10min, add 15ml of 0.1M / L hydrazine hydrate solution as a reducing agent, and continue to stir for 1h, the solution becomes a brick red suspension, after standing, filter, After washing and drying, spherical cuprous oxide with a particle size of about 600nm is obtained.

[0044] (2) In a solvent, use the cuprous oxide obtained in the above step (1) as a hard template, an organic nitrogen source, and an organic carbon source as a precursor. Under the condition of the presence of an alkaline substance, stir and react at room temperature for 24 hours , and subsequently, tran...

Embodiment 2

[0059] The process of preparing nitrogen-doped hollow graphite sphere nanomaterials in this embodiment is the same as the process in Example 1, except that step (2) template agent cuprous oxide, alkaline substance, organic nitrogen source, and organic graphite are used in Example 1. The dosage ratio of source and solvent is changed to: that is, cuprous oxide: alkaline substance, organic nitrogen source: organic graphite source: solvent: 1:0.04:0.7:1.02:100, so that nitrogen-doped hollow carbon with different thicknesses can be obtained spherical nanomaterials. The SEM photo of the nitrogen-doped hollow carbon sphere nanomaterial prepared by the present embodiment is as follows Figure 4 shown.

Embodiment 3

[0061] The process of preparing nitrogen-doped hollow carbon / graphite sphere nanomaterials in this example is the same as that in Example 1, except that the calcination temperature in step (3) in Example 1 is changed from 850°C to 750°C. Finally, nitrogen-doped hollow carbon sphere nanomaterials were prepared. The SEM photo of the nitrogen-doped hollow carbon sphere nanomaterial prepared by the present embodiment is as follows Figure 5 shown.

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Abstract

The invention discloses a nitrogen-doped hollow carbon / graphite sphere nano-material and a preparation method thereof. The preparation method comprises the steps of with spherical cuprous oxide as a hard template agent, carrying out hydrothermal reaction by virtue of an organic carbon source and an organic nitrogen source so as to generate an organic / inorganic composite, carrying out high-temperature roasting in an inert atmosphere, so as to obtain a copper / nitrogen-containing carbon / graphite spherical nano-composite material, and finally removing copper in the nano-composite material, so as to obtain the nitrogen-doped hollow carbon / graphite sphere nano-material. The prepared material has an internal hollow structure and is relatively high in nitrogen doping content, and the thickness ofa sphere shell can be adjusted. Besides, the preparation method is simple and feasible, an adopted template can be recycled, the cost is low, the repeatability is good, and the large-scale productionis easily realized.

Description

technical field [0001] The invention relates to a nitrogen-doped hollow carbon / graphite sphere nano material and a preparation method thereof, belonging to the technical field of inorganic nano materials. Background technique [0002] The development and utilization of new energy is an important issue in today's human society. The storage and conversion of energy provides a guarantee basis for the emergence and application of new energy. Among many energy storage systems, supercapacitors have received great attention due to their long cycle life, environmental friendliness, safety, and high specific energy density. Electrode material is a key factor affecting the performance of supercapacitors, so the preparation and performance research of electrode materials with high specific capacitance is the focus of supercapacitor research. [0003] Carbon / graphite materials have been widely concerned due to their unique morphology and properties. According to the different shapes o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C01B32/05
Inventor 张大伟沈绍典毛东森
Owner SHANGHAI INST OF TECH
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