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Preparation method of chrysotile nanotube in direction arrangement

A fiber serpentine and directional arrangement technology is applied in the field of preparation of fiber serpentine nanotubes, which can solve the problems affecting the application of fiber serpentine nanotubes, low assembly success rate, inability to obtain quantum wires and the like, and achieves process conditions. Ease of control, simple preparation method, and the effect of pure crystalline structure

Inactive Publication Date: 2009-12-23
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the disordered arrangement of chrysotile nanotubes and impurities in the tubes, the assembly success rate of the above methods is all lower than 5%, and continuous quantum wires cannot be obtained; thus affecting the chrysotile nanotubes in the quantum Assembly Applications

Method used

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Examples

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preparation example Construction

[0015] The present invention provides a kind of preparation method of the chrysotile nanotube of alignment, and it comprises steps as follows:

[0016] 1) Prepare NaOH solution and put it in a hydrothermal reaction kettle;

[0017] 2) Prepare an aqueous solution doped with magnetic ions according to the requirement that the magnetic ion / (Mg+Si) molar ratio is 1% to 2%, and add it to the NaOH solution in step 1); wherein, the magnetic ions can be Fe 3+ 、Ni 2+ 、Cr 3+ or Co 2+ Any one in; the aqueous solution is selected from any one of sulfate solution, chloride solution or nitrate solution;

[0018] 3) According to MgO and SiO 2 Weigh active MgO and nano-SiO with a molar ratio of 3:2 2 The powder is sequentially added to the hydrothermal reaction kettle in step 2); then distilled water is added to adjust the pH value of the reaction system to be maintained at 11 to 13.8, and the total solution volume is kept to be 65 to 70% of the cavity volume of the hydrothermal reaction...

example 1

[0023] 1) Weigh 16g of NaOH solid powder into a 200ml volumetric flask, add distilled water to constant volume to prepare a 2mol / L NaOH solution; and put the solution into a hydrothermal reaction kettle;

[0024] 2) With magnetic Fe 3+ Ions are used as dopant ions, according to Fe 3+ / (Mg+Si) molar ratio of 1% requires the preparation of doped Fe 3+ Ferric chloride solution, and it is added in the NaOH solution described in step 1); According to MgO and SiO 2 Weigh active MgO and nano-SiO with a molar ratio of 3:2 2 The powder is sequentially added into the hydrothermal reaction kettle; then distilled water is added to adjust the pH value of the reaction system to 13-13.8, and the total solution volume is kept at 70% of the volume of the reaction kettle cavity;

[0025] 3) Seal the hydrothermal reaction kettle described in step 2), place it in a magnetic field with a magnetic field strength of 0.5T, and heat it to 220°C for constant temperature reaction for 72h, and then co...

example 2

[0029] 1) This step is the same as the step 1) in the example 1, and will not repeat them here;

[0030] 2) With magnetic Fe 3+ Ions are used as dopant ions, according to Fe 3+ / (Mg+Si) molar ratio is that the requirement of 1% ferric sulfate solution is prepared, and it is added in the NaOH solution described in step 1); Press MgO and SiO 2 Weigh active MgO and nano-SiO with a molar ratio of 3:2 2 The powder is sequentially added into the hydrothermal reaction kettle; then distilled water is added to adjust the pH value of the reaction system to 13-13.8, and the total solution volume is kept at 70% of the volume of the reaction kettle cavity;

[0031] 3) Seal the hydrothermal reaction kettle described in step 2), place it in a magnetic field with a magnetic field strength of 0.8T, and heat it to 140°C for constant temperature reaction for 80h, and then cool it naturally;

[0032] 4) Open the cooled hydrothermal reaction kettle described in step 3), slowly absorb the upper ...

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Abstract

The invention discloses a preparation method of chrysotile nanotubes in direction arrangement, comprising the following steps: 1) placing NaOH solution in a hydrothermal reaction kettle; 2) preparing water solution doped with magnetic ions, adding the water solution in the hydrothermal reaction kettle; 3) separately weighting active MgO and nano-SiO2 powder according to a molar ratio of 3 to 2, adding the active MgO and nano-SiO2 powder in the hydrothermal reaction kettle in turn, then adding distilled water in the reaction system, adjusting the pH value of the reaction system to 11-13.8; 4) sealing the hydrothermal reaction kettle and placing the kettle in a magnetic field; meanwhile, heating the hydrothermal reaction kettle and keeping temperature to perform a reaction for 15-80h, cooling; then opening the cooled hydrothermal reaction kettle, sucking up the upper clear liquid slowly and adding distilled water slowly for washing until the washing water which is sucked up is neutral; then heating and drying the product after opening the kettle to obtain the nanotubes of the invention. The method is simple, and the produced chrysotile nanotubes are pure with a perfect crystal structure so that the method is applicable to the nano-assembly and can be used in the preparation of nano-submicron devices.

Description

technical field [0001] The invention relates to a preparation method of christolite nanotubes, in particular to a preparation method of directional arranged christolite nanotubes, belonging to the field of inorganic nanometer materials. Background technique [0002] In the prior art, the research on the preparation of chrysotile nanotubes mainly focuses on the preparation of pure or doped chrysotile nanotubes by hydrothermal method; the disclosed technology includes the preparation of chrysotile by hydrothermal method Tinite single crystals, chrysotile nanotubes prepared by hydrothermal method, and Fe-doped nanotubes prepared by hydrothermal method 3+ The relevant research reports of chrysotile nanotubes; in recent years, there have also been researches on Fe 3+ Occupancy in the as-prepared chrysotile lattice to find the control mechanism of its inner diameter and the growth mechanism of chrysotile nanotubes; assembly of CdS quantum dots in pure chrysotile nanotubes prepare...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/22
Inventor 彭同江马国华李明
Owner SOUTHWEAT UNIV OF SCI & TECH
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