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Method for mass preparing hollow nanometer carbon cages

A carbon nano-cage and hollow carbon technology, applied in the direction of nano-carbon, can solve the problems of easy adhesion, difficult removal, production and final product quality limitations, etc., and achieve the effect of simple device, easy operation and strong adjustability

Inactive Publication Date: 2005-02-23
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method involved in this method can only provide the reaction raw materials quantitatively, and cannot realize the continuous preparation process. Moreover, the inner core is carbide particles, which are not easy to remove in subsequent processing, so its yield and final product quality are subject to certain restrictions. limit
Traditionally speaking, the chemical vapor deposition method is a method suitable for continuous production, but the traditional gas-solid fluidized bed can only be used for the fluidized preparation process of non-carbon particles with a diameter greater than 30 microns. For catalytic cracking In the process of preparing nanocomposite particles, due to the appearance of one-dimensional nanomaterials and easy bonding, it is very easy to cause fluidization difficulties in the production process and cannot be operated normally

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step 1. Preparation of solid carbon nanocages:

[0019] The carbonyl iron liquid and ethanol are uniformly proportioned in a volume ratio of 1:5 to obtain a reaction solution and placed in a volumetric flask; the temperature of the main reactor is raised to 650 ° C, and nitrogen gas is introduced, and the nitrogen flow rate is 16 liters per hour -1 ; The reaction solution is sprayed from the top of the main reactor through the electronic peristaltic pump, and the injection speed is 6 milliliters per hour -1 . Solid carbon nanocages wrapped with metal particles were obtained in the bottom product collector of the main reactor.

[0020] Step 2, preparing hollow carbon nanocages:

[0021] (1) Place the solid carbon nanocages obtained in step 1 in pure nitric acid solution, then place the mixture in an ultrasonic oscillator for ultrasonic oscillation for 1 hour;

[0022] (2) heating the shaken mixture at 100°C, and adding circulating water to reflux for cooling;

[0023...

Embodiment 2

[0026] Step 1. Preparation of solid carbon nanocages:

[0027] Mix nickel carbonyl and ethanol in a ratio of 1:5 by volume to obtain a reaction solution and place it in a volumetric flask; raise the temperature of the main reactor to 800° C., and feed nitrogen with a nitrogen flow rate of 120 liters per hour -1 ; The reaction solution is sprayed from the top of the main reactor through the electronic peristaltic pump, and the injection speed is 100 ml per hour -1 . Solid carbon nanocages wrapped with metal particles were obtained in the bottom product collector of the main reactor.

[0028] Step 2, preparing hollow carbon nanocages:

[0029] (1) The solid carbon nanocage obtained in step 1 is placed in the mixed solution of pure nitric acid and distilled water (V 酸 / V 水 =1:1), and then place the mixture in an ultrasonic oscillator for ultrasonic oscillation for 2 hours;

[0030] (2) heating the shaken mixture at 150°C, and adding circulating water to reflux for cooling; ...

Embodiment 3

[0034] Step 1. Preparation of solid carbon nanocages:

[0035] Carbonyl iron and acetone are uniformly mixed in a volume ratio of 1:10 to obtain a reaction solution and placed in a volumetric flask; the temperature of the main reactor is raised to 750°C, and nitrogen gas is introduced, and the nitrogen flow rate is 40 liters per hour -1 ; The reaction solution is sprayed from the top of the main reactor through the electronic peristaltic pump, and the injection speed is 30 ml per hour -1 . Solid carbon nanocages wrapped with metal particles were obtained in the bottom product collector of the main reactor.

[0036] Step 2, preparing hollow carbon nanocages:

[0037] (1) Place the solid carbon nanocage obtained in step 1 in pure nitric acid solution, then place the mixture in an ultrasonic oscillator for ultrasonic oscillation for 3 hours;

[0038] (2) heating the shaken mixture at 200°C, and adding circulating water to reflux for cooling;

[0039] (3) Dilute the mixture ob...

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Abstract

A process for preparing a lot of hollow carbone nanocages includes such steps as proportionally mixing metallic carbonyl liquid with low-carbon organic liquid to obtain reaction solution, heating reactor while introducing inertial gas to it, pumping said reaction solution into the reactor to obtain solid carbon nanocages, putting them in pure nitric acid or the mixture of nitric acid and distilled water, ultrasonic oscillating, heating, reflux cooling, diluting by distilled water, laying aside for deposition, and baking the deposited substance.

Description

technical field [0001] The invention relates to a method for mass-preparing carbon nanocages, in particular to a method for mass-preparing hollow carbon nanocages. It is used in the technical field of nanomaterial preparation. Background technique [0002] In recent years, more and more attention has been paid to the practical application value of carbon nanomaterials and their specific performance in applications. The hollow carbon nanocage has unique physical and chemical properties, such as forming a carbon layer on the surface of metal nanoparticles to protect metal particles; Depositing different metal elements in its cavity to make nanoscale electronic components has broad application prospects, which determines that its preparation can achieve continuous and large-scale requirements to meet this demand. [0003] The preparation methods of hollow carbon nanocages refer to the preparation methods of nano-metal composite particles, and there are two main categories: phy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15
Inventor 余帆王健农盛赵旻苏连锋
Owner SHANGHAI JIAO TONG UNIV
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