Method of large quantity preparing hollow carbon nano-cage

A carbon nanocage and hollow carbon technology, which is applied in the field of preparation of nanomaterials technology, can solve the problems of difficult fluidization, abnormal operation, and low specific surface area in the production process, and achieve the goals of reducing energy consumption, easy operation, and simplified process Effect

Inactive Publication Date: 2006-06-14
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon has a high specific surface area (>1000m 2 g -1 ), but its amorphousness determines that it is not conducive to conduction; multi-walled carbon nanotubes have a high degree of graphitization, so they have good electrical conductivity, but their specific surface area is usually low (100-200m 2 g -1 ), both of which restrict its application
Traditionally speaking, the chemical vapor deposition method is a method suitable for

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Preparation of solid carbon nanocages:

[0016] 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 main reactor internal injector 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 tail product collector of the main reactor.

[0017] (2) Preparation of hollow carbon nanocages:

[0018] 1. Carry out air oxidation at 400 DEG C with the solid carbon nanocage obtained in step (1), and the time is 0.5 hour;

[0019] ②Place the heated mixture in pure hydrochloric acid solution and oscillate ultrasonically for 1 hour;

[0020] ③Rinse and filter the mixture obtained in the above steps with deionized water until the solutio...

Embodiment 2

[0023] (1) Preparation of solid carbon nanocages:

[0024] The cobalt carbonyl and ethanol are uniformly proportioned 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 900°C, and nitrogen gas is introduced, and the nitrogen flow rate is 40 liters per hour -1 ; The reaction solution is sprayed from the main reactor internal injector through the electronic peristaltic pump, and the injection speed is 50 ml per hour -1 . Solid carbon nanocages wrapped with metal particles were obtained in the tail product collector of the main reactor.

[0025] (2) Preparation of hollow carbon nanocages:

[0026] 1. Carry out air oxidation at 350 DEG C with the solid carbon nanocage obtained in step (1), and the time is 1 hour;

[0027] ②Place the heated mixture in pure hydrochloric acid solution and oscillate ultrasonically for 1.5 hours;

[0028] ③Rinse and filter the mixture obtained in the above steps...

Embodiment 3

[0031] (1) Preparation of solid carbon nanocages:

[0032] The carbonyl iron and ethanol are uniformly proportioned in a volume ratio of 1:30 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 80 liters per hour -1 ; The reaction solution is sprayed from the main reactor internal injector through the electronic peristaltic pump, and the injection speed is 50 ml per hour -1 . Solid carbon nanocages wrapped with metal particles were obtained in the tail product collector of the main reactor.

[0033] (2) Preparation of hollow carbon nanocages:

[0034] 1. Carry out air oxidation at 300 DEG C with the solid carbon nanocage obtained in step (1), and the time is 2 hours;

[0035] ② Place the heated mixture in a mixed solution of pure hydrochloric acid and distilled water (V 酸 / V 水 =1:1), in the solution, ultrasonically oscillated for 1.5 hours;

...

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Abstract

The method for massively preparing hollow carbon nano cage includes the following steps: firstly, preparing solid carbon nano cage: uniformly mixing metal carbonyls liquid and low-carbons organic liquid according to a certain mixing ratio to obtain reaction solution and placing it into a volumetric flask; heating main reactor, introducing inert gas, then making the reaction solution be passed through an electronic peristaltic pump and injected into the volumetric flask by means of injector positioned in the end portion of main reactor so as to obtain solid carbon nano cage wrapped with metal particles from tail portion product collector of main reactor; then preparing hollow carbon nano cage: making the obtained solid carbon nano cage undergo the process of air oxidation treatment, then placing it in pure hydrochloric acid or pure hydrochloric acid and distilled water mixed solution and making ultrasonic oscillation, flushing the mixture obtained after ultrasonic oscillation with deionized water, filtering until the solution is neutrality or approaching to neutrality, standing still to make the solid matter be deposited and removing upper portion liquid, drying so as to obtain the invented hollow carbon nano cage.

Description

technical field [0001] The invention relates to a preparation method in the technical field of nanomaterials, in particular to a method for preparing a large number of hollow carbon nanocages. 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 nano-scale electronic components has broad application prospects, which determines that its preparation can achieve continuous and efficient requirements to meet this demand. The preparation methods of hollow carbon nanocages refer to the preparation methods of nano-metal composite particles, and there are two main categories: physical preparation methods and chemical synthe...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 王健农余帆盛赵旻
Owner SHANGHAI JIAO TONG UNIV
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