Method of in-situ filling symbiotic iron nanometer wire on thin wall nanometer pipe

A technology of iron nanowires and carbon nanotubes, which is applied in the direction of nanotechnology, nanotechnology, and nanostructure manufacturing, can solve the problems of rough tube walls, low filling rate, and tube wall thickness, and achieve simple and controllable preparation processes. Strong controllability, simple process and controllable effect

Inactive Publication Date: 2007-12-19
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the tube wall of carbon nanotubes is not smooth, the tube diameter is different, and the tube wall is thicker; there are many impurities in the product, and some Fe is often filled in the carbon nanotubes. 3 C; the filling rate is low, and the iron nanowire length is below the micron level

Method used

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  • Method of in-situ filling symbiotic iron nanometer wire on thin wall nanometer pipe
  • Method of in-situ filling symbiotic iron nanometer wire on thin wall nanometer pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Weigh 1.0 g of ferrocene powder, dissolve in 20 mL of dichlorobenzene solution, and mix to form a brown-yellow transparent solution;

[0040] 2) Put the quartz substrate base on the quartz boat, then slowly push the quartz boat into the middle of the quartz tube, seal both ends of the quartz tube with sealant, and use the method of heating gas expansion to ensure the air tightness of the quartz tube.

[0041] 3) Pass argon gas into the quartz tube, the flow rate is 200mL / min, and heat to the temperature required for the test at 750°C;

[0042] 4) Use a temperature controller to keep the temperature at the capillary port inserted into the quartz tube at 250°C;

[0043] 5) Adjust argon to 3000mL / min, and feed 200mL / min of hydrogen;

[0044] 6) Turn on the precision flow pump, and suck the reaction solution into the quartz tube at a feed rate of 0.4 mL / min;

[0045] 7) After 30min, stop the flow of hydrogen, reduce the flow of argon to 200mL / min, until the furnace tem...

Embodiment 2

[0047] 1) Weigh 1.2 g of ferrocene powder and dissolve it in 20 mL of dichlorobenzene solution, and mix to form a brownish-yellow transparent solution.

[0048] 2) Put the quartz substrate base on the quartz boat, then slowly push the quartz boat into the middle of the quartz tube, seal both ends of the quartz tube with sealant, and use the method of heating gas expansion to ensure the air tightness of the quartz tube.

[0049] 3) Pour argon gas into the quartz tube, the flow rate is 300mL / min, and heat to 900°C required for the test.

[0050] 4) Use a temperature controller to keep the temperature at the capillary port inserted into the quartz tube at 300°C.

[0051] 5) Adjust the argon gas to 3000mL / min, and pass the hydrogen gas of 200mL / min.

[0052] 6) Turn on the precision flow pump, and suck the reaction solution into the quartz tube at a feed rate of 0.6 mL / min.

[0053] 7) After 30min, stop the flow of hydrogen, reduce the flow of argon to 200mL / min, until the furna...

Embodiment 3

[0055] 1) Weigh 1.8 g of ferrocene powder and dissolve it in 20 mL of dichlorobenzene solution, and mix to form a brown-yellow transparent solution.

[0056] 2) Put the quartz substrate base on the quartz boat, then slowly push the quartz boat into the middle of the quartz tube, seal both ends of the quartz tube with sealant, and use the method of heating gas expansion to ensure the air tightness of the quartz tube.

[0057] 3) Pour argon gas into the quartz tube, the flow rate is 300mL / min, and heat to 820°C required for the test.

[0058] 4) Use a temperature controller to keep the temperature at the capillary port inserted into the quartz tube at 300°C.

[0059] 5) Adjust the argon gas to 3000mL / min, and pass the hydrogen gas of 200mL / min.

[0060] 6) Turn on the precision flow pump, and suck the reaction solution into the quartz tube at a feed rate of 0.8 mL / min.

[0061] 7) After 30min, stop the flow of hydrogen, reduce the flow of argon to 200mL / min, until the furnace ...

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Abstract

A process for preparing the in-situ symbiotic thin-wall carbon nano-tubes and iron nanowires filled in said nanotube includes such steps as dissolving ferrocene in Cl contained organic solvent, filling Ar gas in air-tight quartz tube, heating, controlling the temp at the end of capillary tube inserted in said quartz tube to be 250-300 deg.C, filling H2, pumping said solution in reactor, reaction, stopping to fill H2, and cooling.

Description

technical field [0001] The invention relates to a method for filling thin-walled carbon nanotubes with in-situ symbiotic iron nanowires, and belongs to the technical field of carbon nanomaterial synthesis and application. Background technique [0002] Carbon nanotubes are one-dimensional nanomaterials formed by one or several layers of graphite sheets rolled according to a certain helix angle. Carbon nanotubes are classified into single-walled, double-walled and multi-walled carbon nanotubes. Carbon nanotubes have sparked a global upsurge in research on carbon nanotubes due to their unique structure and excellent properties. The energy gap width of carbon nanotubes varies with the helix angle, and its electrical conductivity is between conductors and semiconductors; for example, carbon nanotubes have a current-carrying capacity of up to 10 9 A / cm 2 The order of magnitude is 1000 times higher than that of copper; theoretical calculations show that the elastic modulus of ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82B3/00
Inventor 王文祥韦进全王昆林吕瑞涛康飞宇张先锋吴德海
Owner TSINGHUA UNIV
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