Carbon nano hollow-ball and its making method

A hollow sphere, carbon nanotechnology, applied in the field of carbon materials in materials, can solve the problems of difficult mass production of carbon nanotubes

Inactive Publication Date: 2003-08-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, carbon nanotubes are currently d

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) prepare 200mL of hydrochloric acid solution containing 1% aniline and pH value of 0; 2) add 1ppm polyethylene glycol to the aforementioned solution; 3) prepare 5.2mL solution containing 20% ​​chromium trioxide and 18% hydrochloric acid; 4 ) adding the chromium trioxide solution dropwise to the aniline solution, and strengthening the stirring, where the molar ratio of chromium trioxide to aniline is 0.5; 5) filtering the obtained precipitate and washing it with water; 6) soaking the precipitate in In 100mL of 1% ammonia water, stir for 2 hours; 7) filter and wash the precipitate obtained; 8) dry the precipitate to obtain polyaniline / chromium hydroxide nanocomposite powder; 9) polyaniline / hydroxide The chromium nanocomposite powder is placed in a nitrogen atmosphere and heated at a high temperature of 300 ° C for 10 hours to obtain a carbon / chromium hydroxide nanocomposite powder; 10) soak the carbon / chromium hydroxide nanocomposite powder in hydrochloric acid solution ...

Embodiment 2

[0024] 1) preparing 20mL of hydrochloric acid solution containing 10% aniline and having a pH value of 3; 2) adding 5ppm polyethylene glycol to the aforementioned solution; 3) preparing 64mL of a solution containing 10% sodium dichromate and 10% hydrochloric acid; 4 ) adding the sodium dichromate solution dropwise to the aniline solution, and strengthening the stirring, where the molar ratio of sodium dichromate to aniline is 1; 5) filtering the obtained precipitate and washing it with water; 6) washing the precipitate Soak in 50mL of 5% ammonia water, stir for 1 hour; 7) filter and wash the precipitate obtained; 8) dry the precipitate to obtain polyaniline / chromium hydroxide nanocomposite powder; 9) mix polyaniline / chromium hydroxide The chromium hydroxide nanocomposite powder is placed in a nitrogen atmosphere, and heated at a high temperature of 400 ° C for 5 hours to obtain a carbon / chromium hydroxide nanocomposite powder; 10) soak the carbon / chromium hydroxide nanocomposit...

Embodiment 3

[0025] 1) Prepare 10 mL of hydrochloric acid solution containing 20% ​​aniline and a pH value of 1; 2) Add 10 ppm of polyethylene glycol to the aforementioned solution; 3) Prepare 1265 mL of a solution containing 1% potassium dichromate and 5% hydrochloric acid; 4 ) adding the potassium dichromate solution dropwise to the aniline solution, and strengthening stirring, where the molar ratio of potassium dichromate to aniline is 2; 5) filtering the obtained precipitate and washing it with water; 6) washing the precipitate Soak in 20mL of 10% ammonia water, stir for 0.1 hour; 7) filter and wash the precipitate obtained; 8) dry the precipitate to obtain polyaniline / chromium hydroxide nanocomposite powder; 9) mix polyaniline / chromium hydroxide The chromium hydroxide nanocomposite powder is placed in a nitrogen atmosphere, and heated at a high temperature of 500 ° C for 1 hour to obtain a carbon / chromium hydroxide nanocomposite powder; 10) soak the carbon / chromium hydroxide nanocompos...

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Abstract

The present invention relates to a carbon nano hollow sphere and its preparation method. Said method includes: using chromic compound to oxidize and polymerize aniline to form polyaniline and chromic hydroxide co-mixed precipitate, washing and drying to obtain the chromic hydroxide co-mixed precipitate, washing and drying to obtain the chromic hydroxide nano composite powder covered by polyaniline, under the condition of isolating air heating the polyaniline/chromic hydroxide nano composite powder to high-temp., making carbonization treatment to obtain the composite powder whose chromic hydroxide nano granule surface is covered with carbon, then dissolving said composite powder in acidic solution to remove chromic hydroxide to obtain the carbon nano hollow sphere which has the structure similar to carbon nano tube, can be used as hydrogen storing material or negative material of lithium ion cell.

Description

Technical field: [0001] The invention relates to a carbon nano hollow sphere and a preparation method thereof. The prepared carbon nano hollow sphere can replace carbon nanotubes as a new type of hydrogen storage material or lithium ion battery negative electrode material, and belongs to the carbon material in the material category [0002] technology field. Background technique: [0003] A carbon nanotube is a carbon material with a hollow tubular structure with a diameter of several nanometers and a length of several micrometers. Carbon nanotubes are a hydrogen storage material or a negative electrode material for lithium-ion batteries. The synthesis methods of carbon nanotubes mainly include arc discharge method and hydrocarbon pyrolysis method. When arc discharge is used to prepare carbon nanotubes, under the protection of inert gas and the action of metal catalysts, the graphite electrode is subjected to direct current discharge at a high temperature above 3000 ° C, a...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 廖川平顾明元
Owner SHANGHAI JIAO TONG UNIV
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