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Chiral mesoporous carbon nanometer fiber and preparation method of chiral mesoporous carbon nanometer fiber

A technology of nanofiber and porous carbon, applied in the field of materials, to achieve the effect of large specific surface area and pore volume

Active Publication Date: 2012-10-03
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, nanoporous carbon fiber materials with chiral pores and helical shape structures have not been reported

Method used

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  • Chiral mesoporous carbon nanometer fiber and preparation method of chiral mesoporous carbon nanometer fiber
  • Chiral mesoporous carbon nanometer fiber and preparation method of chiral mesoporous carbon nanometer fiber
  • Chiral mesoporous carbon nanometer fiber and preparation method of chiral mesoporous carbon nanometer fiber

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Experimental program
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Effect test

Embodiment 1

[0028] The quality is 0.014g N-myristoyl L-glutamic acid (N-myristoyl L-glutamic acid is self-synthesized according to the literature, and the literature is: (1) J.Am.Oil Chem.Soc.1972, 49, 157. Or (2) Fan Zhaxing, Synthesis and Mechanism of Chiral Mesoporous Conductive Polymers, Shanghai Jiaotong University Master Dissertation, 2008) was added to 8ml of ethanol and fully dissolved at 60°C; followed by adding 40ml of deionized water and 0.55ml of pyrrole monomer were placed in an ice-water bath and stirred for 20 minutes; then 7.2ml of 1M HCl and persulfuric acid obtained by dissolving 1.824g of ammonium persulfate in 4ml of water that had been pre-cooled to 0~5°C were added Ammonium aqueous solution, then magnetically stirred in an ice-water bath for 1 h, filtered under reduced pressure, and washed alternately with water and ethanol until the filtrate was close to neutral, and the filtered and washed product was dried in a vacuum oven at 50°C for 24 h to obtain chiral Porous ...

Embodiment 2

[0034] Add 0.014g of N-myristoyl L-glutamic acid into 8ml of ethanol and fully dissolve at 60°C; then add 40ml of deionized water and 0.55ml of pyrrole monomer respectively, place in an ice-water bath and stir for 10min Then add 7.2ml 1M HCl and the 4.973g ferric chloride hexahydrate solution which is pre-cooled to 0 ~ 5 ℃ and dissolve the ferric chloride hexahydrate aqueous solution obtained in 2ml water, and magnetically stir the reaction in an ice-water bath for 0.5h, Filtrate under reduced pressure, and alternately wash with water and ethanol until the filtrate is close to neutral. The filtered and washed product is dried in a vacuum oven at 50°C for 24 hours to obtain a chiral mesoporous carbon nanofiber precursor. The obtained chiral mesoporous carbon nanofiber precursor was heated to 800°C at a heating rate of 3°C / min under a nitrogen atmosphere with a flow rate of 400ml / min, carbonized at a constant temperature for 3h, and naturally cooled to room temperature to obtain ...

Embodiment 3

[0038] Add 0.014g of N-myristoyl L-glutamic acid into 8ml of ethanol and fully dissolve at 60°C; then add 40ml of deionized water and 0.55ml of pyrrole monomer respectively, place in an ice-water bath and stir for 20min Add 7.2ml of water and 4.973g of ferric chloride hexahydrate dissolved in 4ml of water to obtain 7.2ml of water and 4.973g of ferric chloride hexahydrate, respectively, and react with magnetic stirring for 3h in an ice-water bath, and decompress Filter and wash alternately with water and ethanol until the filtrate is close to neutral. The filtered and washed product is dried in a vacuum oven at 50° C. for 24 hours to obtain a chiral mesoporous carbon nanofiber precursor. The obtained chiral mesoporous carbon nanofiber precursor was heated to 900°C at a heating rate of 5°C / min under a nitrogen atmosphere with a flow rate of 100ml / min, carbonized at a constant temperature for 5h, and naturally cooled to room temperature to obtain chiral mesoporous carbon nanofiber...

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Abstract

The invention belongs to the technical field of materials and discloses chiral mesoporous carbon nanometer fiber and a preparation method of the chiral mesoporous carbon nanometer fiber. The method is characterized in that pyrrole is used as an organic monomer, ammonium persulfate or ferric trichloride is used as oxidants, chiral amphipathic molecule N-myristoyl L-glutamic acid is used as a template, a chiral mesoporous carbon nanometer fiber precursor is synthesized by a chiral template molecule self-assembly induction method, and then, the chiral mesoporous carbon fiber is obtained through high-temperature carbonization in the inert atmosphere. The chiral mesoporous carbon fiber prepared by the method has the uniform and consistent spiral shape, meanwhile, a chiral mesoporous passage exists in the fiber axis center, the mesoporous passage size is 10.7 to 17.7nm, the specific surface area is 38 to 277 m<2> / g, the total pore volume is 0.09 to 0.38 cm<3> / g, in addition, rich nitrogen heteroatom is contained on a fiber wall carbon framework, and the nitrogen element content is 4.6 to 17.5 weight percent.

Description

technical field [0001] The invention belongs to the field of material technology, and in particular relates to a chiral mesoporous carbon nanofiber prepared by using a chiral amphiphilic molecular self-assembly as a template and a preparation method thereof. Background technique [0002] Chirality is one of the essential properties of nature, and it exists in various forms in nature, science, art and architecture. Designing and synthesizing porous materials with chiral structures has attracted widespread attention, mainly because of their broad application prospects in the fields of chiral separation, chiral recognition, and chiral catalysis. So far, the development of chiral porous materials has mainly focused on some inorganic compounds (such as chiral mesoporous silica), metal-organic framework materials, and helical polymers. Nanoporous carbon materials have the characteristics of high specific surface area, stable physical and chemical properties, high skeleton conduct...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y40/00C01B32/16
Inventor 吴丁财徐飞符若文孙镔
Owner SUN YAT SEN UNIV
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